Compress video to 25 MB
The internet's favorite "reasonable file" ceiling — with a hard guarantee your video lands under it, compressed on your own 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.
25 MB is the default ceiling a huge slice of the web reaches for: course platforms, CMS media libraries, job application portals, contact forms — and Gmail, which made the number famous. Whoever enforces your limit, they check bytes exactly: a 25.4 MB file fails the same way a 250 MB one does, which is why ConvertUno targets the byte count itself.
One caveat if your destination is an inbox: email inflates attachments by about a third in transit, so a true-25 MB file can still bounce. The Gmail-safe 18 MB preset accounts for that — and our dedicated email page goes deeper with per-provider targets. For ordinary uploads, the full 25 MB preset is the right pick, and the output is guaranteed under it.
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 to 25mb — 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
Why did my upload fail when the file was under 25 MB?
Two usual culprits. Size rounding — a file your computer shows as "25.0 MB" can measure 25.3 MB to the server — and, for email specifically, transfer encoding that inflates attachments in transit. ConvertUno lands outputs safely under the target rather than at it, and the Gmail-safe preset covers the email case.
Is 25 MB enough for a phone video?
Comfortably, for the clips people actually share: one to two minutes keeps sharp 720p-class quality, and shorter clips can stay at full HD. Phone originals are just encoded extravagantly — a deliberate re-encode removes the excess, not the picture.
How long a video fits into 25 MB?
Roughly two minutes at good 720p-class quality, or four to five minutes at a reduced resolution. Screen recordings and static scenes stretch much further than action footage; the tool reports exactly what it chose after each run.
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.