Convert MP4, WebM, MOV, AVI, MKV, and other supported video formats locally in your browser. Files stay on your device and no account is required.
Media Tools converts supported video files directly in your browser with ffmpeg.wasm. Choose a file, select an output format, and download the result without creating an account. Processing stays on your device; conversion speed and practical file size depend on your browser, available memory, hardware, source codec, and selected output format.
Drag and drop a video here, or click to select
Supported formats: MP4, WebM, MOV, MKV, AVI, FLV, M4V, MPG, MPEG, TS, M2TS, VOB, OGV, ASF, WMV, MTS, M2T, GIF
Choose a format pair to open a converter with the input and output formats already selected.
The converter loads ffmpeg.wasm in your browser, reads the selected file from local browser memory, converts it on your device, and creates a downloadable output file. A faster processor and more available memory generally help with larger or longer videos.
The indexed conversion pages cover common pairs involving MP4, WebM, MOV, AVI, MKV, FLV, WMV, OGV, M4V, MPEG, and 3GP. Actual decoding and encoding support also depends on the codecs included in the browser FFmpeg build.
No. Media Tools performs the conversion in the browser and does not upload the selected video to its application server. The file still uses your browser memory and device resources while the conversion is running.
Technology reference: ffmpeg.wasm overview. Format and codec availability can vary with the included WebAssembly build and browser capabilities.
We constantly update our converter to support new formats and codecs.
Note: Conversion speed depends on your device's performance. For very large files, make sure you have enough free memory.
Convert WebM to MP4 when you need broad compatibility or to edit in tools that don’t support WebM. MOV to MP4 for sharing or uploading to platforms. MKV to MP4 for smaller size or device playback. Screen recordings, camera footage, and exports from editors often need a quick format change – this tool does it in the browser with no install.