About this tool
Phone videos are recorded at bitrates meant for editing, not sharing. Discord's free upload limit is 10 MB, email attachments cap around 25 MB, and messaging apps recompress anything large. This tool re-encodes your video with H.264 at a chosen compression level and optional resolution cap, typically cutting the size by 70-90%.
The medium setting at 720p is the sweet spot for sharing: it looks good on any phone screen and turns a 100 MB clip into a few megabytes. Pick 1080p and the light setting when the video will be viewed on a large screen. Audio is re-encoded to compact AAC.
Everything happens inside your browser. Your file is never uploaded to a server: the conversion runs on your own device using WebAssembly, and the result is downloaded straight from memory. Close the tab and nothing is left behind.
How to use it
- Drop your MP4 file into the box above, or click to browse. Nothing is uploaded.
- Adjust the options if you want; the defaults suit most files.
- Click the button and wait a moment.
- Download the result.
Frequently asked questions
How much will my video shrink?
A typical phone recording drops 80-90% with the recommended settings. Screen recordings with little motion compress even further.
How do I get under Discord's 10 MB limit?
Use the strong setting at 480p for clips up to about a minute, or trim the video first.
Why does re-encoding take so long?
Encoding video in the browser runs on a single CPU core, so a re-encode processes roughly real time or slower for 1080p footage. Container swaps (stream copy) are near instant. Keep clips short or lower the resolution when you need speed.
Is this really free?
Yes. The site is supported by ads, and there are no limits on how many files you convert.
Are my files uploaded anywhere?
No. The converter runs entirely in your browser. Files stay on your device, which also makes it faster than upload-based converters for anything larger than a few megabytes.
Is there a file size limit?
The only limit is your device's memory. Images and audio of any normal size are fine; for video, files under about 500 MB work well on most laptops and phones.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox, and Safari on desktop and mobile. Very old browsers without WebAssembly support will not work.