Facebook video checker
Drop a video to see whether it posts as a Facebook reel as is, and whether a scheduling tool can post it through Meta's API: length, shape, size, frame rate, codec and audio.
- Free, no sign-up
- Your videos stay on your device
- Rules checked November 10, 2026
Drop your videos
One file or a batch. MP4 and MOV are read directly, including phone rotation; other formats through your browser. Nothing is uploaded.
Rules from Meta's Help Center and Reels Publishing API, read on November 10, 2026.
Facebook video and reel rules in 2026
- In the app
- Any length or shapeEvery video is a reel since June 2025
- By API
- 3 to 90 seconds60 seconds for a reel shared as a Page story
- Shape
- 9:16 recommended16:9 to 9:16 by API
- Size
- 1080 × 1920540 × 960 minimum by API
- Frame rate
- 24–60 fps, fixedProgressive, 4:2:0, H.264 or H.265 (VP9, AV1)
- Audio
- AAC-LC stereo, 48 kHz128 kbps or more
Sources: Meta Business Help Center: Create a Facebook Reel · Meta for Developers: Reels Publishing API, video specifications, read on November 10, 2026.
The app and the API have different rules
In June 2025 Facebook renamed its Videos tab to Reels, and every video posted is now shared as a reel; Meta says reels can be any length or orientation. Scheduling tools work through Meta's Reels Publishing API instead, and that has firm rules: 3 to 90 seconds, a shape between 16:9 and 9:16, at least 540 × 960, 24 to 60 fps at a fixed frame rate, progressive, 4:2:0 and H.264 or H.265. The checker shows both, so you know whether a file will post from the app, from a scheduler, or both.
Phone videos and the fixed frame rate
Phones often record at a variable frame rate, which the API rules out. The video frame rate checker shows whether a clip varies and how to convert it to a fixed rate.
Where text goes on a reel
The profile name, caption and buttons sit over the bottom and right of a reel. The Facebook Reels safe zone template marks where, from Meta's Reels guidance, on a transparent 1080 × 1920 PNG to lay over your edit while you place text.
Embed this checker
Teachers, bloggers and course creators can put this facebook video checker on their own page for free. Paste the code below into your page's HTML. It loads from markstudios.com, so it stays current when we update the numbers.
Questions, answered.
Anything else? Message Mark and you'll get a written reply within one business day.
How long can a Facebook video be?
In the app, any length: since June 2025 every video posted to Facebook is a reel, and Meta says reels can be any length or orientation. Tools that post reels through Meta’s API are limited to 3 to 90 seconds, and a reel shared as a Page story to 60 seconds.
What size should a Facebook reel be?
9:16 vertical at 1080 × 1920, as Meta recommends; its API needs at least 540 × 960 and a shape between 16:9 and 9:16.
Why won’t my scheduling tool post my Facebook reel?
Meta’s Reels Publishing API is stricter than the app: 3 to 90 seconds, 24 to 60 fps at a fixed frame rate, progressive, 4:2:0, H.264 or H.265 (VP9 and AV1 too), AAC stereo audio at 48 kHz. A phone video with a variable frame rate or a long video fails it. The checker lists which rule a file misses.
Do Facebook videos have to be vertical?
No. Meta says reels can be any orientation; 9:16 fills a phone screen, which is why Meta recommends it.
Is my video uploaded anywhere?
No. The checker reads the file in your browser and nothing leaves your device.
Rather have it edited for you?
Send the footage, and the edit comes back cut and sized for Pinterest, Facebook and the rest, and you work directly with Mark.
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