Convert a supported video to MP4 or WebM right in your browser. Pick a file up to 128 MB and 5 minutes, then preview and download the result.
Drop a video here
MP4, MOV, MKV, WebM; limited MJPEG AVI · Up to 2 GB on a computer
Converting video…
Runs on your device. Keep this tab open.
ChatCut opens in a new tab with your request. Add your file there.
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Why ChatCut
Choose H.264/AAC MP4 for sharing, or VP9/Opus WebM for web video.
When the input already uses the target codecs, keep its encoded tracks instead of re-encoding them.
Play the converted file and compare its size with the original before downloading.
Conversion reads your file inside this tab. It does not upload the video.
The file this page produces has no added watermark, logo or end card.
Keep the primary video and audio. Extra audio, subtitles and attachments are not carried over.
How it works
Pick a supported video file from your device. Keep it within 128 MB and 5 minutes.
Choose the output format and start conversion. Compatible tracks are copied; other supported tracks are re-encoded.
Check the result, save the converted copy, or restart with another video.
Learn
MP4, MOV, MKV and WebM describe how a file packages its tracks. A codec describes how the pictures or sound are compressed inside that package. This is why two files with the same extension can behave differently in a browser. A MOV from a camera might contain H.264 or another codec. Check the source codec when a file will not open, rather than assuming that changing its extension will fix playback.
Convert supported video to MP4 with H.264 video and AAC audio, or choose WebM with VP9 video and Opus audio. MP4 is a practical interchange choice for a recipient asking for an ordinary video file. WebM is useful when a website or receiving tool specifically accepts it. Audio is included only when the source has a supported primary audio track. Check the finished copy in the destination player before treating a successful conversion as a completed handoff.
The tool checks video and audio separately against the selected output codecs. Matching tracks can be copied, while other supported tracks are encoded again. Re-encoded video uses a target bitrate of 8 Mbps, and re-encoded audio uses 192 kbps. These are encoding settings, not promises about the final size. H.264 encoding rounds odd dimensions up to even values, adding at most one pixel per dimension rather than cropping the picture.
The output carries the primary video and audio, leaving out extra soundtracks, subtitle tracks and attachments. Use the source when those additional assets matter. Files must fit the size, duration and resolution limits before conversion starts. A readable container still needs supported codecs, and an audio conversion failure stops the job rather than silently removing sound. For an unsupported file, export a standard H.264/AAC MP4 using a desktop converter first.
Use cases
Make an MP4 copy when the recipient cannot open your MOV or WebM.
Make a WebM version of a short clip for a website.
Try a supported MKV or MJPEG AVI without uploading the recording.
Keep editing
Add your downloaded file in ChatCut to trim it, add captions or make a vertical cut. Manual editing and export do not use credits; built-in Agent requests do.
Skills
100+ Skills. No experience needed. Start in one click.
FAQ
The tool reads supported MP4, MOV, MKV and WebM files. AVI is limited to MJPEG video with optional 16-bit PCM audio, up to 60 seconds; the codec matters as much as the extension.
This page outputs MP4 or WebM. The separate MP4 to MOV tool makes H.264 MOV files locally; it is not a general MOV export feature in the ChatCut editor.
Not necessarily. A container change may barely change the size, and re-encoding can make it larger; use the video compressor when smaller size is the goal.
Compatible tracks can be copied without re-encoding. Changing codecs re-encodes the affected tracks and may change their quality.
No. This tool keeps the primary video and audio only, and does not carry over extra soundtracks, subtitle tracks or attachments.
Yes. Conversion on this page is free, needs no sign-up and adds no watermark. Continuing in ChatCut is separate: built-in Agent messages use credits; manual editing and export do not.
No. The conversion engine reads and writes media inside your browser. If you choose to continue in ChatCut, add the downloaded file there yourself.
Use a recent browser with WebCodecs. Files are limited to 128 MB, 5 minutes and 4096 × 2160 pixels; AVI is limited to 60 seconds, and codec support varies by browser.
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