Free tool · No signup · Runs in your browser
Social media video size and length checker
Choose a video and see which networks accept it: file size, duration, dimensions, aspect ratio and container format, compared with the rules SimplePost checks before publishing. The video is read locally and never uploaded.
The file is read in your browser and never uploaded.
Results by network
Choose a file to compare it with each network's rules.
How to use it
How to use the video size checker
Choose the video
Pick the exported file you plan to publish.Check the upload limit
Hosted SimplePost accepts up to 50 MB per file in the web app and 500 MB through MCP, the API and the CLI.Read each network
Duration, size and shape are checked per network; Instagram also tells you whether the video works in a carousel.Schedule it
Upload in SimplePost or pass a public URL to your assistant.
What it checks
Video rules by network
TikTok accepts up to 10 minutes and 360 to 4,096 px per side. A single Instagram video is published as a Reel of 3 seconds to 15 minutes; carousel videos are limited to 60 seconds. Bluesky accepts one MP4 up to 10 minutes and 300 MB, Telegram bots up to 50 MB, and Threads up to 5 minutes. Browsers cannot read the codec, frame rate or bitrate, which SimplePost checks after upload.
| Network | Formats | Max size | Duration | Shape |
|---|---|---|---|---|
| X | Any accepted type | 512 MB | 0.5 s to 7,500 s | 1:3 to 3:1 |
| Any accepted type | 200 MB | Not limited by SimplePost | – | |
| MP4, MOV | 300 MB | 3 s to 900 s | Up to 1920 px wide | |
| Any accepted type | 4 GB | Not limited by SimplePost | – | |
| Threads | Any accepted type | 1 GB | Up to 300 s | – |
| Bluesky | MP4 | 286.1 MB | Up to 600 s | – |
| TikTok | Any accepted type | 4 GB | Up to 600 s | 360 to 4096 px per side |
| YouTube | Any accepted type | 256 GB | Up to 43,200 s | – |
| Any accepted type | 2 GB | 4 s to 900 s | – | |
| Telegram | MP4 | 50 MB | Not limited by SimplePost | – |
FAQ
Video size checker questions
How long can a TikTok video be?
Up to 600 seconds through SimplePost, or less if your TikTok account has a lower maximum. The video must be 360 to 4,096 px per side.
What is the Instagram Reels length limit?
A single video of 3 seconds to 15 minutes is published as a Reel. Videos inside a carousel are limited to 60 seconds.
Why is my video too large for SimplePost?
Hosted uploads are limited to 50 MB in the web app and 500 MB through MCP, the API and the CLI, even when the network allows more.
Is my video uploaded?
No. The browser reads its metadata locally. Nothing is sent anywhere.
Next steps
From checked draft to scheduled post
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