Free Tool
Video Format Converter
Convert between MP4 (AVC/H.264), WebM VP9, and WebM VP8 — entirely in your browser. No upload, no server, no size limits. Your video never leaves your device.
Drag to compare
Convert between MP4, WebM VP9, and WebM VP8 entirely in your browser — no upload
Output format
Format support depends on your browser. Some options may fail.
Drop a video file or click to upload
MP4 · WebM · MOV · AVI — converted in a background worker
Format guide
WebM VP9 — modern, open format. Best compression, widely supported on Chrome, Firefox, Edge. Great for web delivery.
WebM VP8 — older open format. Universal browser support including Safari 14+. Slightly larger than VP9.
MP4 (AVC) — universally compatible with all browsers, devices, and video editors. Best for sharing and downloads.
Note: conversion re-encodes the video in real time using your browser's built-in codecs. The output quality depends on the browser encoder — Chrome VP9 typically produces excellent results.
Frequently asked questions
Will converting change the video quality?
Conversion re-encodes the video through the browser codec. There is a small quality cost each time you re-encode — for most conversions this is invisible at normal viewing sizes. To minimize loss, start from the highest-quality source you have.
Why does it take as long as the video?
The converter plays the video in real time to a canvas, which a MediaRecorder captures frame by frame. There is currently no faster path available in browsers without native FFmpeg access.
Which format should I use for Instagram and TikTok?
MP4 (AVC/H.264) is the safest choice for social platform uploads. VP9/WebM is excellent for web embeds in modern browsers.
Does this work on iPhone and Safari?
MP4 (AVC) output is supported in Safari. WebM VP9 output is not supported in Safari — use MP4 for iOS compatibility.
Is my video uploaded to a server?
No. All conversion happens in your browser. Your video never leaves your device.
Why it's different
Video format conversion entirely in your browser — no FFmpeg server, no upload, completely private. MP4, WebM VP9, and VP8 output with no size limits.
100% Private
Everything runs on your device using in-browser AI. Nothing is transmitted to any server — not the file, not metadata, not filenames.
True Alpha Channel
We export straight (non-premultiplied) alpha so transparent PNGs open with a real checkerboard in Photoshop and Figma — no black halos.
Free Forever
No paywall, no watermark, no premium tier. The full-quality AI is free, supported by non-intrusive ads.
Works Offline
Once loaded, the app and AI models cache locally. Process files without an internet connection. Installable as a desktop or mobile app.
Ready to try it?
Free, private, no signup.
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