Change video format
Change format of a video online to MP4, MOV, WebM, AVI or MKV in seconds. Try the tool right now. 100% local in-browser processing, nothing ever uploaded
Drop your video here
MP4, WebM, AVI, MOV supported
Supported formats
How it works
Step 1
Upload your video
Step 2
Select new format
Step 3
Download converted video
Common mistakes
- Uploading a video file too large for the browser (keep it under 2 GB).
- Closing the tab before processing finishes: the conversion stops.
- Using an exotic input format (prefer MP4, WebM, MOV, AVI).
- Picking a bitrate so low that quality drops noticeably.
Pro tips
- Pick H.264 (MP4) for the widest compatibility.
- For the web, use WebM (VP9/AV1): smaller file at the same quality.
- Keep the original: processing is local but the download is final.
- On mobile, plug in the charger for long videos.
Privacy guaranteed
local processing in your browser.
Change video format — MP4, MOV, AVI, MKV, WebM
Convert the container of your video between MP4, MOV, AVI, MKV and WebM, re-encode when needed with a compatible codec (H.264, H.265, VP9), update metadata and ensure smooth playback on every player, web browser, smart TV and iOS or Android mobile device.
Also discover our tool to convert video online.
Technical details
Convert between MP4, MOV, AVI, WebM, MKV or FLV containers to guarantee compatibility with any browser or device through reliable conversion.
Why choose our online format changer
Our online format changer stands out with 100% local processing via FFmpeg.wasm directly in your Chrome, Firefox, Safari or Edge browser — no server upload, no queue, no arbitrary size limit. You get a fast, free, no-signup, watermark-free tool compatible with all your MP4, MOV, AVI, MKV, WebM, FLV, WMV, M4V, 3GP files and more. Perfect for YouTubers, TikTokers, Instagram Reels creators, Premiere Pro editors, DaVinci Resolve, CapCut, Final Cut users, marketing pros, e-learning trainers and individuals who want to change video format without installing heavy software like HandBrake, Adobe Media Encoder or VLC.
Cross-device compatibility — PC, Mac, iPhone, Android
Our format changer works on Windows 10, Windows 11, macOS Ventura, Sonoma, Sequoia, Linux Ubuntu, Debian, Fedora, as well as iOS 16+ (iPhone, iPad), iPadOS, Android 10+ (Samsung Galaxy, Google Pixel, Xiaomi, OnePlus) and even Chrome OS on Chromebook. No native app, no APK, no .exe to download: just open the page in your favorite browser and start processing your videos. Compatible with videos from smartphones (4K HDR, slow-motion), GoPro cameras, DJI drones, OBS screen captures, After Effects exports, Loom screencasts and files downloaded from YouTube, Vimeo, TikTok, Twitch or Twitter/X.
Privacy, GDPR compliance and video security
Unlike competing services (Clideo, Kapwing, Veed.io, FlexClip, Online-Convert, Convertio, CloudConvert, FreeConvert, EZGif, Zamzar) that upload your files to remote servers in the US or Asia, our tool processes your entire video in your browser's RAM. Not a single byte is sent over the Internet, ensuring full GDPR, CCPA, LGPD and HIPAA compliance. Perfect for confidential business documents, medical, legal, educational videos, copyrighted content and any personal file you do not want to entrust to any third party.
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