How it works
- Choose your WebM file.
- Press Convert to MP4.
- Download your MP4.
Where WebM files come from
WebM is a web video format. You'll often get one from browser screen recorders, video downloads, some messaging apps and website media. It plays well in browsers, but many phones, TV apps and editors like iMovie or some versions of Premiere don't import it. MP4 fixes that.
How the conversion works
WebM uses the VP8 or VP9 video codec and Opus audio. Kliprio decodes those in your browser and re-encodes them as H.264 video with AAC audio, the combination every device supports.
Frequently asked questions
Why won't my WebM play on iPhone?
Some iPhone apps don't support WebM files. Converting to MP4 makes them play in Photos and every other app.
Is my video uploaded anywhere?
No. Kliprio runs entirely in your browser using your device's built-in video encoder. Your file is never sent to a server, so it stays private and nothing is stored on our side.
Is there a file size limit?
Kliprio has no fixed limit. The practical limit is your device's memory: computers handle files of several gigabytes, while phones do best with videos under about 1 GB. If a very large file fails on your phone, try it on a computer.
Is Kliprio really free?
Yes. Kliprio is free to use and is supported by ads shown on the page, never inside the tool or on the download button. There's no watermark and no account.