Compress video for TikTok
TikTok's byte caps depend on where you upload from — and a leaner file clears every one of them and posts faster, compressed on your device.
Drop your video here
or
MP4, MOV, WebM, MKV, AVI and more — any size, no upload
🔒 Files never leave your device — everything runs in your browser.
TikTok's real limits are per surface, and most of the numbers floating around converter sites are not among them. Officially: web uploads accept files under 10 GB and up to 30 minutes; the mobile app caps DURATION (up to 60 minutes uploaded, 10 recorded in-app) and publishes no file-size cap at all; scheduling tools posting through TikTok's API are capped at 4 GB; and videos for Ads Manager must be 500 MB or less.
In practice the win is speed and reliability: a phone-recorded 4K clip can be hundreds of megabytes for one minute of footage, and TikTok re-encodes everything you send anyway. Compressing first — especially to the 500 MB ads cap or the 4 GB scheduler cap — makes uploads finish in a fraction of the time on mobile data without changing what viewers see after TikTok's own processing.
How it works
- Drop your file
Any common format, any size. Nothing is uploaded — the tool runs in your browser.
- Pick your target
Use the presets above — this page's defaults are tuned for compress video for tiktok — or type any size.
- Download
Your converted file is ready on your device — nothing to wait for, nothing to delete from a server.
Frequently asked questions
What is TikTok's maximum upload size?
From the web, files under 10 GB and up to 30 minutes. From the app, TikTok publishes only duration limits — up to 60 minutes for uploaded videos — not a byte cap. Third-party schedulers using TikTok's API are limited to 4 GB, and ads to 500 MB.
Is the "287 MB iPhone limit" real?
It appears on no official TikTok page today, so we don't print it as fact. The officially documented byte caps are the web's 10 GB, the API's 4 GB, and Ads Manager's 500 MB — the app documents duration, not size.
Will compressing hurt quality after TikTok re-encodes?
TikTok re-encodes every upload to its own delivery formats, so a sensibly compressed file and a bloated original usually look the same to viewers. Keep the resolution at 720x1280 or higher — the web uploader's stated floor — and let the compressor spend the bytes where they matter.
Is my file uploaded to a server?
No. ConvertUno runs entirely in your browser on your own device. Your file never leaves your computer or phone — there is no upload at all.
Is it really free, with no watermark?
Yes. Processing happens on your device, so serving you costs us almost nothing — no watermark, no account, no file-size limit, no daily quota.