Video Converter
MP4, MOV, MKV, WebM, GIF or sound only (MP3, WAV, M4A…), at the size and quality you pick.
Made by one person, free for everyone to use.Uses your browser’s own video encoders (WebCodecs), much faster than real time. When only the format changes (e.g. MP4 → MOV/MKV), the video is copied as-is: instant and lossless. Older browsers fall back to slower real-time recording.
How it works
- 1. Choose your fileMP4, WebM, MOV, MKV, TS. It opens on your device.
- 2. Set your optionsSee a live preview before anything is saved.
- 3. DownloadProcessed in your browser. Nothing is uploaded.
Free online video converter: fast, private and no signup
MP4, MOV, MKV, WebM, GIF or sound only (MP3, WAV, M4A…), at the size and quality you pick. Video Converter on JustEditFiles works right in your browser on Android, iPhone, Windows, Mac and Linux. There is nothing to install, no account to make and no watermark added to your MP4 or MOV or MKV or WebM or GIF or MP3 or WAV or M4A or AAC or OGG or FLAC file.
Unlike most online tools, your file is never uploaded: the video converter runs on your own device, so even private documents, photos and videos stay with you. It also means no waiting for uploads and less mobile data used.
People also use it to: mp4, webm, mov to mp4, mkv to mp4, video to mp4, compress video, resize video, change resolution.
Video Converter: questions and answers
How do I use the video converter online?
Open JustEditFiles's Video Converter page, choose your MP4, WebM and MOV file, set your options while watching the live preview, then download. It takes a few seconds and works in any modern browser.
Is this video converter really free?
Yes. Video Converter on JustEditFiles is completely free: no account, no trial, no daily limit and no watermark on your result.
Are my files uploaded to a server?
No. Video Converter runs inside your browser, on your own phone or computer. Your file is never uploaded, so it stays private and it saves your mobile data.
Which file formats does Video Converter support?
It opens MP4, WebM, MOV, MKV and TS and saves as MP4, MOV, MKV, WebM, GIF, MP3, WAV, M4A, AAC, OGG and FLAC.
Can I use Video Converter on my phone?
Yes. JustEditFiles is built for phones first, including low-cost Android phones, and works just as well on iPhone, tablets, Windows, Mac and Linux. There is nothing to install.
Is there anything I should know before using Video Converter?
Uses your browser’s own video encoders (WebCodecs), much faster than real time. When only the format changes (e.g. MP4 → MOV/MKV), the video is copied as-is: instant and lossless. Older browsers fall back to slower real-time recording.