Social Media Platform Limits Guide (2026)
You just spent 45 minutes editing a video. You go to upload it. And the platform says "file too large."
Or you write the perfect caption, hit post, and half of it gets cut off because you went over the character limit.
These moments are painful. And they're completely avoidable.
This guide covers every limit you need to know for the six major social media platforms in 2026: Instagram, TikTok, YouTube, Facebook, X (Twitter), and LinkedIn.
Bookmark this page. You'll come back to it.
Why Platform Limits Matter More Than You Think
Knowing your limits isn't just about avoiding errors. It's about creating content that fits each platform perfectly.
When you understand the boundaries, you can plan smarter. You can write captions that stay within range. You can export videos at the right length and file size the first time.
And when you're cross-posting content across multiple platforms, these differences become even more important. A caption that works on LinkedIn might get chopped on X. A video that fits TikTok might be too long for YouTube Shorts.
Let's break it all down, platform by platform.
Instagram Limits (2026)
Instagram has some of the tightest limits of any major platform, especially for captions and video length. Here's every number you need.
Instagram Text Limits
| Content Type | Limit |
|---|---|
| Caption length | 2,200 characters |
| Bio length | 150 characters |
| Username length | 30 characters |
| Hashtags per post | 30 max (3-5 recommended) |
| Comments | 2,200 characters |
| DM length | 1,000 characters |
The caption limit of 2,200 characters sounds generous, but it goes fast when you're writing storytelling captions or including hashtags at the end.
Here's the thing most people miss: Instagram truncates captions after about 125 characters in the feed. Everything after that goes behind a "...more" tap. So your first sentence needs to hook people immediately.
For hashtag strategy, Instagram's own recommendation is to use 3 to 5 highly relevant hashtags rather than stuffing all 30. The algorithm has evolved past hashtag-stuffing, and using too many can actually make your post look spammy.
Instagram Image Limits
| Spec | Limit |
|---|---|
| Image file size | 30MB |
| Recommended resolution | 1080 x 1350 (portrait) |
| Aspect ratios | 1.91:1 to 4:5 |
| Carousel images | Up to 10 slides |
| Image formats | JPEG, PNG |
Carousel posts are one of Instagram's best-performing formats right now. You get up to 10 slides, and the algorithm often re-shows carousels to people who didn't swipe the first time. That's essentially free extra reach.
Instagram Video Limits
| Spec | Limit |
|---|---|
| Reels length | Up to 15 minutes (90 seconds recommended) |
| Video file size | 4GB |
| Feed video length | Up to 60 minutes |
| Stories length | 60 seconds per story |
| Aspect ratio (Reels) | 9:16 |
| Video formats | MP4, MOV |
Instagram Reels can technically go up to 15 minutes now, but the sweet spot is still under 90 seconds. The 59-second rule for short-form content applies heavily here. Shorter Reels get more replays, and replays signal the algorithm to push your content further.
If you're uploading video, always use the Reels format. Instagram deprecated the old "Video" media type in late 2024, so all video uploads should go through Reels now.
Instagram Activity Limits
| Action | Limit |
|---|---|
| Follows per day | ~100 |
| Unfollows per day | ~100 |
| Likes per hour | ~60 |
| Comments per hour | ~30 |
| DMs per day | ~50-80 (new accounts lower) |
| Posts per day | No hard limit (10+ raises flags) |
| Stories per day | No hard limit (recommended under 10) |
These activity limits are soft caps that Instagram enforces through temporary blocks. If you hit them, you'll get a "Try Again Later" message and might lose action privileges for 24 to 48 hours.
New accounts have stricter limits. If your account is less than 3 months old, cut these numbers in half to stay safe.
Socialync tip: When you schedule posts across multiple platforms, you never have to worry about accidentally posting too fast. The scheduling queue spaces things out automatically, keeping you well within safe limits.
TikTok Limits (2026)
TikTok has loosened many of its limits over the past year, but there are still some important caps to know.
TikTok Text Limits
| Content Type | Limit |
|---|---|
| Caption length | 2,200 characters |
| Hashtags per post | 50 max |
| Bio length | 80 characters |
| Comment length | 150 characters |
| Username length | 24 characters |
TikTok and Instagram now share the same 2,200-character caption limit. But on TikTok, hashtags count toward that character limit. So if you load up on hashtags, you're eating into your caption space.
Most successful TikTok creators use 3 to 7 hashtags and keep captions short and punchy. Long-form storytelling captions don't perform as well on TikTok as they do on Instagram or LinkedIn.
TikTok Video Limits
| Spec | Limit |
|---|---|
| Video length | Up to 10 minutes |
| Video file size | 4GB |
| Aspect ratio | 9:16 (recommended) |
| Resolution | 1080 x 1920 (recommended) |
| Video formats | MP4, MOV, WebM |
The 10-minute limit gives you plenty of room for longer content, but TikTok's algorithm still heavily favors shorter videos. Videos under 60 seconds get the most distribution, especially for accounts that aren't already large.
If you're creating for both TikTok and YouTube Shorts, keep your videos under 60 seconds to fit both platforms. Check out our guide on TikTok scheduling for more tips on optimizing your posting workflow.
TikTok Photo Limits
| Spec | Limit |
|---|---|
| Photo file size | 72MB per photo |
| Photos per post | Up to 35 slides |
| Photo formats | JPEG, PNG, WebP |
TikTok's photo carousel feature (called "Photo Mode") supports up to 35 slides, which is significantly more than Instagram's 10-slide limit. Photo carousels have been performing well on TikTok, so this is worth experimenting with if you haven't tried it yet.
TikTok Activity Limits
| Action | Limit |
|---|---|
| Posts per day | No hard limit (3-5 recommended) |
| Follows per day | ~200 |
| Likes per day | ~500 |
| Comments per day | ~200 |
| DMs per day | Varies by account age |
| API posts per day | Rate limited (varies) |
TikTok's API rate limits are especially important if you're using scheduling tools. The platform throttles API posting to prevent spam, which means your scheduling tool needs to handle retries gracefully.
This is something Socialync handles automatically. If TikTok's API rate-limits a scheduled post, our retry system will attempt the upload again with proper backoff timing so nothing gets lost.
YouTube Limits (2026)
YouTube has two very different sets of limits: one for Shorts and one for long-form videos. Let's cover both.
YouTube Shorts Limits
| Spec | Limit |
|---|---|
| Video length | Up to 60 seconds |
| Title length | 100 characters |
| Description length | 5,000 characters |
| Aspect ratio | 9:16 |
| File size | Same as long-form (256GB) |
YouTube Shorts has a strict 60-second maximum. Not 61 seconds. Not 60.5. If your video is even a frame over 60 seconds, YouTube will classify it as a regular video instead of a Short.
This is one of the most common mistakes creators make when repurposing content across platforms. You create a 90-second Reel, try to upload it as a Short, and it doesn't get the Shorts treatment.
The title limit of 100 characters is tight compared to long-form YouTube. Make every character count and front-load your keywords.
YouTube Long-Form Limits
| Spec | Limit |
|---|---|
| Video length | Up to 12 hours |
| File size | 256GB |
| Title length | 100 characters |
| Description length | 5,000 characters |
| Tags | 500 characters total |
| Thumbnail size | 2MB (1280 x 720 recommended) |
| Playlist title | 150 characters |
| Video formats | MP4, MOV, AVI, WMV, FLV, WebM, 3GPP |
YouTube is the most generous platform when it comes to video length and file size. You can upload a 12-hour video if you want (and some creators do for live stream archives).
The 500-character tag limit is often overlooked. Tags aren't as important as they used to be for YouTube SEO, but they still help with misspelling coverage and topic association. Don't waste them on generic terms; use them for specific phrases and common misspellings of your topic.
YouTube Upload Limits
| Spec | Limit |
|---|---|
| Default upload limit | 15 minutes (unverified accounts) |
| Verified upload limit | 12 hours or 256GB |
| Uploads per day | No published limit |
| API quota | 10,000 units per day (default) |
New YouTube accounts are limited to 15-minute uploads until you verify your account with a phone number. This takes about 2 minutes and is worth doing immediately after creating your channel.
The API quota of 10,000 units per day matters for scheduling tools. A single video upload costs about 1,600 units, so the default quota supports roughly 6 video uploads per day through the API. If you need more, you can apply for a quota increase through Google's API console.
Facebook Limits (2026)
Facebook has some of the most generous text limits of any platform, but its video and image limits have some surprises.
Facebook Text Limits
| Content Type | Limit |
|---|---|
| Post length | 63,206 characters |
| Comment length | 8,000 characters |
| Page description | 255 characters |
| Ad headline | 40 characters (recommended) |
| Ad primary text | 125 characters (recommended) |
| Bio/Intro | 101 characters |
That 63,206-character post limit is not a typo. Facebook lets you write what amounts to a small book in a single post. Of course, nobody should actually do this. But it means you never have to worry about truncation on Facebook.
For most posts, keeping things under 500 characters tends to drive the best engagement. People scroll fast on Facebook, so shorter posts with a strong hook perform better than walls of text.
Facebook Image Limits
| Spec | Limit |
|---|---|
| Photos per post | Up to 10 |
| Image file size | 30MB |
| Recommended size | 1200 x 630 (link posts) |
| Cover photo size | 820 x 312 |
| Profile photo size | 176 x 176 |
| Image formats | JPEG, PNG, BMP, GIF, TIFF |
Facebook supports up to 10 photos per post, which matches Instagram's carousel limit. The platform automatically creates a collage layout when you upload multiple images.
Facebook Video Limits
| Spec | Limit |
|---|---|
| Video length | Up to 240 minutes |
| Video file size | 4GB |
| Recommended resolution | 1080p |
| Aspect ratios | 16:9, 9:16, 1:1, 4:5 |
| Video formats | MP4, MOV (recommended) |
| Reels length | Up to 90 seconds |
The 4-hour video limit on Facebook is generous, but most video content performs best when kept under 3 minutes for feed videos. Facebook Reels follow a similar pattern to Instagram Reels, capping at 90 seconds.
Facebook Activity Limits
| Action | Limit |
|---|---|
| Friend requests per day | ~20 |
| Page likes per day | ~200 |
| Group joins per day | ~10 |
| Posts per day (personal) | No hard limit |
| Posts per day (page) | No hard limit (2-5 recommended) |
| Messages per day | Varies |
Facebook's activity limits are less aggressive than Instagram's, but they still exist. The friend request limit is the one most people encounter first, especially if they're trying to grow a personal profile for business purposes.
Ready to manage all your platforms from one place? Socialync lets you schedule and post to Instagram, TikTok, YouTube, Facebook, X, and LinkedIn from a single dashboard. Try it free with 5 posts, then unlock unlimited posting for just $10/month.
X (Twitter) Limits (2026)
X has the most complex limit system because of the split between free and premium tiers. The platform's limits changed significantly after the introduction of X Premium.
X/Twitter Text Limits
| Content Type | Free Limit | Premium Limit |
|---|---|---|
| Post length | 280 characters | 25,000 characters |
| Reply length | 280 characters | 25,000 characters |
| DM length | 10,000 characters | 10,000 characters |
| Bio length | 160 characters | 160 characters |
| Display name | 50 characters | 50 characters |
| Username | 15 characters | 15 characters |
The 280-character limit on free accounts is the tightest text limit of any major platform. This forces you to be concise, which can actually be a strength. Some of the most viral posts on X are under 100 characters.
If you have X Premium, the 25,000-character long-form posts give you blog-like writing space directly on the platform. However, these longer posts are displayed differently in the feed, and engagement patterns are still evolving for this format.
X/Twitter Media Limits
| Spec | Free Limit | Premium Limit |
|---|---|---|
| Images per post | 4 | 4 |
| Image file size | 5MB (JPEG/PNG), 15MB (GIF) | 5MB (JPEG/PNG), 15MB (GIF) |
| Video length | 2 min 20 sec | Up to 4 hours |
| Video file size | 512MB | 8GB |
| Video resolution | 1920 x 1200 | 1920 x 1200 |
| Video formats | MP4 (H.264) | MP4 (H.264) |
The video limits show the biggest gap between free and premium. Free accounts are capped at 2 minutes and 20 seconds, while premium accounts can upload videos up to 4 hours long.
For most creators, the free video limit is sufficient for short-form content. But if you're uploading longer clips, tutorials, or repurposed YouTube content, the premium tier's 4-hour limit opens up a lot of possibilities.
X/Twitter Activity Limits
| Action | Free Limit | Premium Limit |
|---|---|---|
| Posts per day | ~2,400 | ~2,400 |
| DMs per day | ~500 | ~1,000 |
| Follows per day | ~400 | ~400 |
| Likes per day | ~1,000 | ~1,000 |
| Bookmarks | No limit | No limit |
| Lists | 1,000 | 1,000 |
X has the most generous posting limit at 2,400 posts per day. You'll never hit that organically, but it's relevant for brands running high-volume engagement strategies or automated threads.
X/Twitter API Limits
| Tier | Read Limit | Post Limit | Monthly Cost |
|---|---|---|---|
| Free | 1 app, limited reads | 1,500 posts/month | $0 |
| Basic | 10,000 reads/month | 3,000 posts/month | $100/month |
| Pro | 1,000,000 reads/month | 300,000 posts/month | $5,000/month |
X's API pricing is the most expensive of any social platform. This directly impacts scheduling tools and third-party apps. The $100/month Basic tier only allows 3,000 posts per month, which is shared across all users of a given app.
This is why many scheduling tools have had to adjust how they handle X/Twitter integration. The API costs get passed along to users in some form, whether through higher subscription prices or posting limits.
LinkedIn Limits (2026)
LinkedIn is the platform most people underestimate when it comes to content creation. Its limits are generally generous, and organic reach is still strong in 2026.
LinkedIn Text Limits
| Content Type | Limit |
|---|---|
| Post length | 3,000 characters |
| Article headline | 700 characters |
| Article body | 125,000 characters |
| Comment length | 1,250 characters |
| Connection note | 300 characters |
| Headline (profile) | 220 characters |
| Summary (profile) | 2,600 characters |
LinkedIn's 3,000-character post limit gives you enough room for detailed thought leadership posts. Many of the best-performing LinkedIn posts use 1,500 to 2,500 characters with line breaks every 1 to 2 sentences for readability.
The article headline limit of 700 characters is surprisingly generous. Most headlines should be under 100 characters anyway, but you have the space if you need it.
LinkedIn Media Limits
| Spec | Limit |
|---|---|
| Video length | Up to 10 minutes |
| Video file size | 5GB |
| Image file size | 10MB |
| Carousel slides | Up to 200 slides |
| Document size | 300 slides or 100MB |
| Image formats | JPEG, PNG, GIF |
| Video formats | MP4, ASF, AVI, FLV, MKV, MOV, WebM |
LinkedIn allows up to 200 carousel slides, which is wild. Document-style carousel posts are one of the highest-performing content types on LinkedIn, and having up to 200 slides means you can create incredibly detailed presentations.
Most viral LinkedIn carousels are between 8 and 15 slides. But having the extra room means you can repurpose entire slide decks without trimming.
The 5GB video file size limit is the largest of any platform on this list. Combined with the 10-minute length cap, this means you can upload very high-quality video without compression concerns.
LinkedIn Activity Limits
| Action | Limit |
|---|---|
| Connection requests per week | ~100 |
| Posts per day | No hard limit (1-2 recommended) |
| InMail per month | Varies by subscription |
| Page followers invites per month | 250 |
| Group memberships | 100 |
| Pending connections | 3,000 max |
LinkedIn is stricter about connection request limits than other platforms are about follows. Sending too many connection requests, especially without notes, can get your account restricted.
The recommendation of 1 to 2 posts per day is based on performance data. Unlike TikTok where more posting can mean more reach, LinkedIn tends to suppress your newer posts if you post too frequently. Quality over quantity matters most here.
Quick Comparison: All Platforms Side by Side
Here's the master comparison table you'll want to save.
Caption and Text Limits
| Platform | Post/Caption Limit |
|---|---|
| 2,200 characters | |
| TikTok | 2,200 characters |
| YouTube (title) | 100 characters |
| YouTube (description) | 5,000 characters |
| 63,206 characters | |
| X (free) | 280 characters |
| X (premium) | 25,000 characters |
| 3,000 characters |
Video Limits
| Platform | Max Length | Max File Size |
|---|---|---|
| Instagram Reels | 15 min | 4GB |
| TikTok | 10 min | 4GB |
| YouTube Shorts | 60 sec | 256GB |
| YouTube (long) | 12 hours | 256GB |
| 240 min | 4GB | |
| X (free) | 2 min 20 sec | 512MB |
| X (premium) | 4 hours | 8GB |
| 10 min | 5GB |
Images Per Post
| Platform | Max Images |
|---|---|
| 10 (carousel) | |
| TikTok | 35 (photo mode) |
| 10 | |
| X | 4 |
| 200 (carousel/document) |
When you see these numbers side by side, the challenge of multi-platform posting becomes obvious. A single piece of content needs to be adapted for wildly different constraints.
That's exactly why tools like Socialync exist. Instead of manually checking each platform's limits every time you post, Socialync handles the formatting and validation for you before your content goes live.
How Platform Limits Affect Scheduling Tools
If you use any kind of scheduling tool, platform limits add another layer of complexity. Here's what you need to know.
API Rate Limits
Every platform imposes rate limits on their APIs, which directly affect how scheduling tools operate.
Instagram's Graph API allows a limited number of content publishing calls per hour. TikTok's Content Posting API has similar restrictions. YouTube's Data API uses a quota system where each action costs a certain number of units.
These API limits mean your scheduling tool might not be able to post everything at the exact second you scheduled it. Good tools handle this with retry queues and backoff strategies. Bad tools just silently fail.
Socialync uses an automatic retry system with exponential backoff. If a platform's API temporarily rejects a post, the system waits and tries again, increasing the wait time between attempts. This means your content gets posted even during high-traffic periods when APIs are under strain.
File Size Validation
One of the most frustrating experiences is scheduling a post, walking away, and coming back to find it failed because the video was too large.
When you're scheduling content for multiple platforms at once, you need to ensure your media files meet every platform's requirements. A 4.5GB video will work on LinkedIn (5GB limit) but fail on Instagram, TikTok, and Facebook (all 4GB limits).
The smart approach is to always target the most restrictive platform in your set. If you're posting to Instagram, TikTok, and YouTube Shorts, your video needs to be under 60 seconds (YouTube Shorts limit) and under 4GB (Instagram and TikTok limit).
Caption Length Handling
When you write one caption and post it everywhere, something is going to get cut. A 1,000-character caption works perfectly on Instagram, Facebook, and LinkedIn. But it's way over X's 280-character limit.
The best practice is to write platform-specific captions. Your X caption should be a punchy, standalone thought. Your Instagram caption can tell a story. Your LinkedIn caption should provide professional context.
If you want to learn more about adapting content without getting penalized, check out our guide on avoiding content duplication penalties.
Daily Posting Best Practices by Platform
Knowing the limits is one thing. Knowing the optimal posting frequency is another. Here's what the data shows in 2026.
Instagram: 1-2 feed posts, 3-5 Stories per day
Instagram rewards consistency more than volume. One high-quality Reel per day outperforms three mediocre ones. Stories can be more frequent because they disappear after 24 hours and don't compete with your feed content.
TikTok: 1-3 posts per day
TikTok's algorithm gives each video independent reach regardless of your posting frequency. More posts means more chances to hit the algorithm's recommendation engine. But quality still matters. Three strong videos beat five weak ones.
YouTube Shorts: 1-2 per day
YouTube Shorts benefits from daily posting, but the algorithm values watch time and completion rate more than upload frequency. One Short per day is a solid baseline.
YouTube Long-Form: 1-2 per week
Long-form YouTube is the one platform where posting less often is actually better. Each video needs time to accumulate views, comments, and watch time. Posting too frequently can cannibalize your own content's performance.
Facebook: 1-3 posts per day
Facebook pages can post more frequently than personal profiles without penalty. Mix up your content types: link posts, image posts, video, and text-only posts all perform differently in the Facebook algorithm.
X/Twitter: 3-5 posts per day
X rewards high-frequency posting more than any other platform. The feed moves fast, and each post has a short lifespan. Mixing original tweets, replies, and retweets throughout the day keeps your profile active and visible.
LinkedIn: 1 post per day, 5 days per week
LinkedIn's algorithm can actually suppress your content if you post more than once per day. Stick to one high-quality post per weekday. Weekends tend to have lower reach, so save your best content for Tuesday through Thursday.
Managing posting schedules across six platforms is a lot. That's why creators use Socialync to plan, schedule, and publish everything from one dashboard. You get 5 free posts to try it out, then it's $10/month for unlimited scheduling across all platforms.
Hidden Limits Most People Don't Know About
Beyond the obvious character counts and file sizes, each platform has hidden limits that can trip you up.
Instagram's Shadowban Triggers
Instagram doesn't publicly acknowledge shadowbans, but certain behaviors consistently reduce your reach. Using the same set of hashtags on every post, posting and deleting content repeatedly, and using banned hashtags can all trigger reduced distribution.
The limit here isn't a number. It's a pattern. Vary your hashtags, keep your posts up once published, and avoid any hashtags that show a "recent posts hidden" warning when you search them.
TikTok's New Account Restrictions
New TikTok accounts face stricter limits for the first 7 to 30 days. You might not have access to live streaming, your posts might get fewer impressions, and certain features like links in bio are locked until you hit follower thresholds.
The follower threshold for the link-in-bio feature is currently 1,000 followers. For live streaming, you need at least 1,000 followers as well.
YouTube's Copyright System
YouTube's Content ID system is a limit in disguise. If your video contains copyrighted music, even a few seconds, it can get claimed. This doesn't always mean the video is removed, but it can mean the creator of the original content gets the ad revenue instead of you.
For Shorts specifically, YouTube provides a library of licensed music clips. Using music from this library is always safe. For long-form, consider royalty-free music libraries or original audio.
Facebook's Link Penalty
Facebook has consistently reduced the organic reach of posts that contain external links. If you're sharing blog posts or YouTube videos on Facebook, expect lower reach compared to native content.
The workaround is to put the link in the first comment instead of the post itself. This isn't officially sanctioned by Facebook, but many marketers report better reach with this approach.
X's Visibility Filtering
X uses a visibility filtering system that can reduce how many people see your posts. Accounts that post too many links, use certain keywords, or get frequently muted/blocked may have reduced distribution.
Engaging authentically, replying to others, and mixing content types helps maintain good standing in X's ranking system.
LinkedIn's SSI Score Impact
LinkedIn's Social Selling Index (SSI) score affects your content's organic reach. This score is based on four factors: establishing your professional brand, finding the right people, engaging with insights, and building relationships.
A higher SSI score correlates with better content distribution. You can check your score at linkedin.com/sales/ssi.
Formatting Content for Multiple Platforms
Now that you know all the limits, here's a practical workflow for creating content that works everywhere.
Step 1: Create for the Most Restrictive Platform First
If you're creating a short-form video, start with YouTube Shorts' 60-second limit. Every other platform supports at least 60 seconds, so this gives you a universal baseline.
For captions, write the X version first (280 characters). Then expand it for Instagram and TikTok (2,200 characters). Then add even more detail for LinkedIn (3,000 characters) and Facebook (unlimited, practically).
Step 2: Export at the Right Specs
For video, export at 1080 x 1920 (9:16 vertical) in MP4 format. This works on every platform.
Keep your file size under 4GB to be safe for Instagram, TikTok, and Facebook. If you're only posting to YouTube or LinkedIn, you have more headroom.
Step 3: Adapt, Don't Just Copy-Paste
Each platform has its own culture and expectations. What works as a LinkedIn post feels wrong on TikTok, and vice versa.
Write unique captions for each platform. Use hashtags differently. Adjust your call to action based on what the platform's audience expects. Our guide on cross-posting strategies goes deeper into how to adapt without duplicating.
Step 4: Schedule Everything at Once
Once your content is adapted for each platform, schedule it all in one sitting. This is where a multi-platform scheduler saves hours of time.
With Socialync, you can upload your video once and customize the caption, hashtags, and posting time for each platform individually. Everything goes out on schedule without you having to log into six different apps.
API Rate Limits for Developers and Power Users
If you're a developer building integrations or a power user who wants to understand why your scheduling tool behaves the way it does, this section is for you.
Instagram Graph API
Instagram's Content Publishing API allows 50 API-published posts per 24-hour period per Instagram account. This includes photos, videos, carousels, and Reels. The rate limit resets on a rolling 24-hour window, not at midnight.
For reading data (insights, comments, etc.), the limit is 200 calls per hour per user. More details are available in Meta's API documentation.
TikTok Content Posting API
TikTok's Content Posting API has rate limits that vary based on your app's approval level. New apps start with lower limits and can request increases after demonstrating legitimate use.
The posting flow involves a two-step process: initiate the upload, then publish. Each step has its own rate limit. Timeouts between steps can cause failed posts, which is why retry logic is essential.
YouTube Data API v3
YouTube uses a quota system rather than simple rate limits. Each API operation costs a certain number of quota units, and you get 10,000 units per day by default.
Here's the breakdown of common operations:
| Operation | Quota Cost |
|---|---|
| Video upload | ~1,600 units |
| Read operation | 1 unit |
| Search | 100 units |
| Write operation | 50 units |
With 10,000 daily units, you can upload about 6 videos per day through the API. For most creators, this is plenty. For agencies managing multiple channels, a quota increase request is necessary.
LinkedIn API
LinkedIn's Marketing API has a daily limit of 150 share creation calls per member per day. For organization pages, the limit scales based on the number of followers.
LinkedIn also enforces a rate limit of 100 API calls per day per member for most endpoints, with some endpoints having higher limits.
Facebook Graph API
Facebook's Graph API uses a tiered rate limiting system. App-level limits allow approximately 200 calls per user per hour. Page-level limits depend on the number of people engaged with your page.
For posting content, the practical limit is well above what any normal posting schedule would require.
What Happens When You Hit a Limit
Different platforms handle limit violations differently. Here's what to expect.
Instagram: You'll see a "Try Again Later" error. Repeated violations can lead to temporary action blocks lasting 24 to 48 hours. Severe or repeated offenses can lead to account restrictions.
TikTok: The platform may reduce your content's distribution or temporarily block certain actions. In extreme cases, accounts can be shadowbanned or suspended.
YouTube: Exceeding API quotas returns a 403 error. Your uploads will fail until the quota resets. The daily quota resets at midnight Pacific Time.
Facebook: Going over rate limits returns error codes that tell you exactly which limit you hit. Facebook's error messages are some of the most descriptive of any platform.
X/Twitter: API rate limit errors return a 429 status code with a header telling you when the limit resets. On the app itself, you'll see prompts to wait before performing more actions.
LinkedIn: Exceeding connection request limits triggers a temporary block on sending requests. Content posting limit violations are rare because the limits are so high.
Staying Within Limits While Maximizing Output
The goal isn't to hit every limit. It's to produce the maximum amount of quality content while staying comfortably within each platform's boundaries.
Here are three strategies that work.
Batch Creation
Create all your content for the week in one session. When you batch-create, you can plan your captions across platforms, ensure your videos meet length requirements for each platform, and schedule everything at once.
This approach eliminates the daily scramble of creating, formatting, and posting. It also makes it easier to stay within activity limits because you're spreading your engagement throughout the week rather than doing everything in bursts.
Platform Prioritization
You don't have to post on every platform every day. Pick 2 to 3 primary platforms and make those your focus. Treat the others as secondary distribution channels.
For most creators in 2026, the priority stack is:
- TikTok or Instagram Reels (short-form discovery)
- YouTube (long-form depth and search)
- LinkedIn or X (community and engagement)
Use a Scheduling Tool
This is the simplest way to stay within limits while maintaining a consistent presence across all platforms. When you schedule content in advance, you can see your entire week at a glance and avoid posting too much on any single platform.
Socialync makes this easy. Connect all your social accounts, schedule your posts with platform-specific customizations, and let the system handle the timing and delivery. Start with 5 free posts to see how it works, then go unlimited for $10/month.
Limits Change: How to Stay Updated
Platform limits change regularly. Instagram increased its Reels length. TikTok expanded to 10-minute videos. X overhauled its entire API pricing structure.
Here's how to stay current:
Follow official blogs. Each platform maintains a blog or newsroom where they announce changes. Instagram's Creator blog and TikTok's Newsroom are the most reliable primary sources.
Watch for in-app notifications. Platforms often roll out limit changes gradually and announce them through in-app banners or creator tools.
Follow this blog. We update our guides whenever major platform changes happen. Bookmark our cross-posting guide and this platform limits reference for the latest numbers.
Wrapping Up
Every platform has its own set of rules. Character limits, video lengths, file sizes, posting caps, API quotas... the list goes on.
But you don't have to memorize all of this. Bookmark this guide and come back whenever you need a quick reference.
The key takeaways:
- Instagram and TikTok share the same caption limit (2,200 chars) but have different video length caps
- YouTube Shorts has the strictest length limit at 60 seconds
- Facebook has the most generous text limit at 63,206 characters
- X/Twitter has the tightest text limit at 280 characters (free tier)
- LinkedIn offers the largest carousel and video file size allowances
- API rate limits affect all scheduling tools, so reliable retry systems matter
The simplest way to manage all of this? Use a tool that handles the complexity for you.
Socialync validates your content against each platform's limits before posting, retries failed uploads automatically, and lets you customize content for each platform from a single dashboard. Try it free with 5 posts, then unlock unlimited scheduling for $10/month.
Stop worrying about limits. Start creating.