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Instagram Reel size and specs
Instagram recommends 9:16 for reels, with at least 720 pixels and 30 frames per second. The Instagram app takes reels up to 20 minutes, and reels over 3 minutes are not recommended to new audiences. Through Instagram’s API, which scheduling tools use, a reel runs 3 seconds to 15 minutes. Files can be up to 300 MB. That is the limit for reels posted through Instagram’s API. Formats: MP4 and MOV. Instagram’s API allows 15:00. Socialync posts up to 3:00.
| Size and shape | 9:16 recommended, at least 720 pixelsUploads can be any shape from 1.91:1 landscape to 9:16 vertical, and 9:16 avoids cropping or blank space. At least 720 pixels and 30 frames per second. Through the API, at most 1,920 pixels wide and 60 frames per second. |
|---|---|
| Length | 3 seconds to 15:00The Instagram app takes reels up to 20 minutes, and reels over 3 minutes are not recommended to new audiences. Through Instagram’s API, which scheduling tools use, a reel runs 3 seconds to 15 minutes. |
| File size | Up to 300 MBThat is the limit for reels posted through Instagram’s API. |
| Formats | MP4, MOVH.264 or HEVC video with AAC audio. |
| What Socialync posts | Up to 3:00, files up to 4 GBInstagram’s API allows 15:00. Socialync posts up to 3:00. |
Platform numbers come from each platform's own help and developer pages, checked October 11, 2026. Socialync's numbers are the limits it checks before it publishes.
Check your video for Instagram Reels
Drop the file to see whether it fits Instagram Reels and every other platform you pick, with the fix for anything that fails. The check runs in your browser, so the video never leaves your device.
Frequently asked questions
What size is an Instagram Reel?
Instagram recommends 9:16 for reels, with at least 720 pixels and 30 frames per second. Uploads can be any shape from 1.91:1 landscape to 9:16 vertical, and 9:16 avoids cropping or blank space.
How long can an Instagram Reel be?
The Instagram app takes reels up to 20 minutes, and reels over 3 minutes are not recommended to new audiences. Through Instagram’s API, which scheduling tools use, a reel runs 3 seconds to 15 minutes. Instagram’s API allows 15:00. Socialync posts up to 3:00.
What is the maximum file size for an Instagram Reel?
Files can be up to 300 MB. That is the limit for reels posted through Instagram’s API.
What video formats does Instagram accept?
MP4, MOV. H.264 or HEVC video with AAC audio.
Does the checker upload my video?
No. Your browser reads the file size, type, length and frame size on your device, and nothing is sent anywhere.
Video specs for every platform
| Platform | Size and shape | Length | File size | Formats | Socialync posts |
|---|---|---|---|---|---|
| Instagram Reels | 9:16 recommended, at least 720 pixels | 3 seconds to 15:00 | Up to 300 MB | MP4 and MOV | Up to 3:00, files up to 4 GB |
| TikTok | 360 to 4,096 pixels on each side | Up to 10:00 | Up to 4 GB | MP4, WebM and MOV | Up to 3:00, files up to 4 GB |
| YouTube Shorts | Vertical or square, up to 1080p | Up to 3:00 | Up to 256 GB | MP4, MOV, WebM, AVI and more | Up to 3:00, files up to 4 GB |
| Facebook Reels | 1080x1920 (9:16) recommended | No limit | Not published | MP4 and MOV | Up to 3:00, files up to 4 GB |
| 256x144 to 4096x2304 | 3 seconds to 15:00 | 75 KB to 5 GB | MP4, MOV, AVI, WebM and more | Up to 3:00, files up to 4 GB | |
| X (Twitter) | 720x1280 recommended for vertical | 0.5 seconds to 2:20 | Up to 512 MB | MP4 and MOV | Up to 2:20 without X Premium, files up to 512 MB |
| Threads | 9:16 recommended, up to 1,920 pixels wide | Up to 5:00 | Up to 1 GB | MP4 and MOV | Up to 5:00, files up to 1 GB |
| Bluesky | Not published | Up to 10:00 | Up to 300 MB | MP4, MPEG, WebM and MOV | Up to 10:00, files up to 300 MB |