Free tool · no signup

Video specs checker for LinkedIn, X, YouTube, Instagram and TikTok

Choose a video and see at once whether it meets the official upload limits of LinkedIn, X, YouTube, Instagram, TikTok, Meta ads and Product Hunt.

Your video

Choose a video (MP4, MOV or WebM; it stays on your computer)

Choose a video to check it.

Next step Video file size estimator →

Short answer

Choose your video and the checker reads its file size, length, resolution, shape and frame rate, then compares them with the official limits for 11 places to post. Each place shows Ready, Check or Fix first, with the reason and a link to the platform page the limit comes from.

By the Overnight Cut team, a product video studio for software teams · Updated 16 October 2026 · Runs in your browser; nothing you type is sent to us

Every platform has its own upload limits, and they differ more than most people expect. A film that posts fine on LinkedIn can be too long for a standard X account, the wrong shape for a LinkedIn ad, or below the frame rate Instagram asks for. Finding out at upload time, on launch morning, is the worst moment.

This checker reads your video in the browser and tests it against the limits each platform publishes on its own help or ads page. It never uploads the file. The limits were taken from the official pages and are dated, with a link to each source, so you can confirm any result yourself.

What it checks

File size against each platform's maximum, and LinkedIn's minimum of 75 KB.
Length against the shortest and longest video allowed, with a warning where a platform limits reach for longer videos.
Shape and resolution, such as the four shapes LinkedIn ads accept or the minimum size TikTok asks for.
Frame rate, measured by playing a second of the video. It is an estimate, so confirm it in your editor if a result is close.
File type, from the file's extension. The checker cannot see the codec inside the file, so export H.264 MP4 when in doubt.

The limits that catch people most

A standard X account takes videos up to 140 seconds and 512 MB, so a two and a half minute demo will not post there without cutting. LinkedIn ads accept only MP4 files in 16:9, 1:1, 4:5 or 9:16, and the page asks for less than 30 frames per second. Instagram asks Reels for at least 30 frames per second. Product Hunt does not take a video file at all: it takes the full link to a public YouTube video.

If a platform needs a different shape, re-lay the film for that shape rather than cropping it, so the text and the product stay in frame. Our guide to video aspect ratios for product launches explains how.

How to fix a failed check

Too big: export at a lower bitrate, and use the video file size estimator to find a bitrate that fits. Too long: cut a shorter version for that platform, such as a 15 second cut for feeds. Wrong frame rate: change it in your editor's export settings, for example to 29.97 for LinkedIn ads or 30 for Instagram. Wrong shape: make a version laid out for that shape. Need a GIF for a README instead? Use the video to GIF converter.

Every film we make arrives in 16:9, 9:16 and 1:1, each laid out for its shape. Launch + Ads adds three openings in all three shapes, ready for Meta and LinkedIn.

How to use it

Choose your video. Pick the exported file from your computer. It is read by your browser and not uploaded.
Wait a moment. The checker reads the size, length and resolution, then plays a second of the video to measure the frame rate.
Read the results. Each place to post shows Ready, Check or Fix first. Open any card to see the reason and the limit.
Fix and check again. Re-export the version that failed, choose the new file and check it again before you post.

Frequently asked questions

Where do the limits come from?

From each platform's own help or ads specification page, checked on the date shown under the results. Every card links to its source. Platforms change their limits, so confirm on the page before a big launch.

Is my video uploaded?

No. The video is opened by your browser on your own computer. The checker reads its details there and nothing is sent to us or anyone else.

Why does it say the frame rate is "about" a number?

Browsers do not report a video's frame rate directly, so the checker plays about a second and counts the frames shown. It is usually within a fraction of the real value. If a result is close to a limit, check the frame rate in your editor.

Can it check the codec, such as H.264 or ProRes?

No. The browser does not tell a web page which codec a file uses, so the checker only reads the file type from its name. LinkedIn ads, for example, do not accept ProRes, so export H.264 MP4 if you are not sure.

What video length works on every platform?

A film of 15 to 30 seconds fits the length limits of every place on this list, and sits inside LinkedIn's recommended range for ads. The shape still matters: Shorts and Reels need square or vertical video. Longer demos are best on YouTube and your own site.

Sources

Want it made for you? Launch + Ads, $899

For launches with ad money behind them: three openings in three shapes, a 60 second demo for people who want more, and everything in Launch Day. You see a storyboard and a private preview first, and pay only once you are happy.

See what's in Launch + Ads or get a free storyboard →