Compress video to 16 MB
Sixteen megabytes, guaranteed. Compressed privately on your own device — nothing is uploaded anywhere.
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.
16 MB earned its fame as WhatsApp's long-standing media limit — and it is still the cap for WhatsApp Status videos and older app versions, as well as a popular attachment ceiling in messaging apps and email gateways across many regions. If a chat app trims or refuses your video, 16 MB is a very safe number to aim for.
It is also a sweet spot: double Discord's classic 8 MB but small enough to send quickly on mobile data. ConvertUno fits your clip under 16 MB with a hard guarantee, keeping audio when the budget allows and telling you honestly if it had to reduce the resolution to protect picture quality.
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 16mb — 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
Is 16 MB still the WhatsApp limit?
For normal chat videos WhatsApp now allows much larger files, but Status videos and many older app versions still enforce 16 MB — and WhatsApp re-compresses big videos aggressively anyway. Sending a pre-compressed 16 MB file keeps you in control of how the result looks.
How much video fits nicely into 16 MB?
Roughly a minute of sharp 720p-class footage, or two to three minutes at a reduced resolution. Fast-motion clips (sports, games) consume the budget faster than talking-head or static-scene footage.
Will the receiver need any special app to play it?
No — the output is a standard MP4 (H.264) file that plays natively on every phone, computer, and messaging app.
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.