Convert Video Online Free - MP4, MOV, WebM (No Upload)
Convert between MP4, MOV, and WebM All Private - instant and lossless when codecs match. No upload, no watermark, no sig…
Read article →How to use the Video Converter tool
- Choose the video you want to convert.
- Leave "Fast mode" on when it appears: it changes the container without re-encoding, so it is instant and lossless. Otherwise pick a quality.
- Press Convert.
- Preview the result and download it.
About this tool
A video file is really two things: a container (MP4, WebM, MOV) and the codecs inside it (for example H.264 video and AAC audio). Many "conversions" only need a new container. When your video already uses codecs the target container supports, this tool copies the streams straight across in a fraction of a second with zero quality loss.
When the codecs do not match, such as VP9 in WebM going to H.264 in MP4, the video is decoded and re-encoded with your browser's hardware encoder. You choose the quality, and the tool caps the bitrate so the new file does not balloon past the original.
Why use ToolsCrow for this
- Lossless fast mode. MOV to MP4 or MP4 to MOV with H.264 and AAC is a copy, not a re-encode.
- Three output formats. MP4 (H.264), WebM (VP9) and MOV (QuickTime).
- Private. Nothing is uploaded.
- Clear errors. If a codec cannot be handled in your browser, you get a plain-English explanation.
Good to know
- Browsers can only decode the codecs they ship with. AVI, WMV and MPEG-2 files often contain codecs (Xvid, DivX, WMV, MPEG-2) that browsers cannot read, so those files may be rejected. HEVC support depends on your device.
Frequently asked questions
Is my video uploaded to a server?
No. Everything runs inside your browser tab using your own device's video hardware. Your file is never sent to ToolsCrow or anyone else, which also means there is no waiting for an upload and it keeps working if your connection drops after the page has loaded.
Is it really free? Is there a watermark?
It is free with no sign-up, no watermark and no daily limits. The only limits are the ones your device sets: memory and processing power.
How large a video can I use?
Because the video is processed on your device, the limit is your device's memory rather than a server quota. Phone clips of several hundred MB are fine on most devices, and desktop computers usually handle 1 to 2 GB. Files over about 4 GB are not supported.
Which browsers work best?
Current Chrome, Edge and Safari (16.4 or newer, including iPhone and iPad) work best because they include the WebCodecs video engine. Recent Firefox versions work for many files. Older browsers fall back to a much slower real-time mode or may not work at all.
My iPhone video will not open. Why?
iPhones often record HEVC (H.265). Whether a browser can decode HEVC depends on your device: Safari usually can, Chrome and Edge only with supported hardware, Firefox generally cannot. If your video is rejected you will see a clear message rather than a broken file. In iPhone settings, Camera > Formats > Most Compatible records H.264 instead.
Why does my result have Opus audio instead of AAC?
Some browsers (for example Chrome on Linux) cannot encode AAC audio. When that happens the tool saves Opus audio instead and tells you. Opus plays in Chrome, Firefox, Edge, VLC and recent Safari; if you need AAC everywhere, run the tool in Chrome or Edge on Windows or macOS, or in Safari.
Which format should I pick?
Choose MP4 for maximum compatibility (phones, TVs, social platforms, email). Choose WebM for websites, where VP9 gives smaller files at the same quality. Choose MOV only when an Apple editing workflow asks for it.
Related video tools
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- MP4 to WebMConvert MP4 files to WebM in your browser.
- WebM to MP4Convert WebM files to MP4 in your browser.
- MKV to MP4Convert MKV files to MP4 in your browser.
- Video CompressorShrink any video to a fraction of its size while keeping it sharp, or type the exact size you need in MB.
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