Different platforms and workflows prefer different video formats. Editing software commonly works with MOV, web playback often uses MP4 and WebM, and archival workflows may prefer MKV. This tool converts videos to the container you need directly in the browser without installing software or uploading the video.
MP4 is the most broadly compatible option and is supported by almost all devices, players, and social platforms. H.264 video with AAC audio is a common combination. WebM is designed for web playback and supports VP8 video with Vorbis audio in this tool. MOV is suitable for editing workflows and integrates well with the Apple ecosystem. MKV is a highly flexible container that can hold many types of codecs and is useful for archives and multi-track media. If you need an animated GIF, use the dedicated Video to GIF tool instead.
To avoid presenting a full screen of codec parameters, the common settings are limited to output container, video codec, resolution, and audio codec. The available video codecs change with the selected container: MP4 and MOV provide H.264 / H.265, MKV also provides H.264 and H.265, and WebM provides VP8. Audio options depend on the container and include AAC / MP3 / FLAC / Vorbis, with a No Audio option for video-only output. Resolution can remain at the source size or be reduced to 1080p, 720p, 480p, or 360p. The tool never enlarges the video. Whenever a setting changes, the conversion preview is updated immediately to compare input and output resolution, frame rate, and estimated size, and to explain the main effect of the conversion.
If you need more control over file size, you can specify a target bitrate. The encoder then uses the selected bitrate instead of CRF, making the output size easier to estimate. If the bitrate is left empty, the encoder uses constant-quality encoding. Frame rate is useful for screen recordings and footage with limited motion, where lowering the frame rate can reduce encoded data. The encoding preset controls the trade-off between speed and file size at similar quality: ultrafast is faster but can produce somewhat larger files, while slow takes longer but can produce smaller files at similar quality. Audio bitrate can be selected from 64 to 192 kbps, and 96 kbps is usually sufficient for speech.
Changing the video codec or resolution requires re-encoding and therefore introduces another compression step. H.264 and H.265 are both lossy codecs, and repeated transcoding can accumulate quality loss. It is therefore better to choose the desired format and settings in one step instead of repeatedly converting between formats. If the source video has already lost detail, choosing a lower CRF or higher bitrate cannot restore it; it only makes the resulting file larger.
Convert MOV files from phones or cameras to MP4 for broader device and platform compatibility; convert MP4 to WebM for web background video; standardize source material as MKV for archiving; or prepare footage with a specific codec for an editing workflow. All processing takes place on your own device.
This tool does not use server-side video conversion. The video is read locally through the browser file interface, encoding is performed inside the browser using a WebAssembly sandbox, and the output file is generated and downloaded by the browser. When the page is closed or refreshed, the file reference is released. The video is never uploaded or stored on the server.
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