Our Media Lab brings FFmpeg, compiled to WebAssembly, directly to your web browser — video transcoding, audio extraction, and trimming without ever sending your files to a remote server. This is the ideal solution for creators and professionals handling confidential footage or large media assets that would be cumbersome to upload.
Browser-Based Media Processing
Convert between MP4, MOV, AVI, GIF, and MP3 (WebM is accepted as an input, not currently an output option) using FFmpeg's default encoder settings — there isn't a manual quality/bitrate/resolution slider today, so output size follows the source file's characteristics. This runs on the single-threaded WebAssembly build of FFmpeg — solid for everyday clips, but a multi-minute 4K file will take noticeably longer than the same job on a desktop app that can spread work across CPU cores.
Extract the audio track from a video file as an MP3. Cut a clip to a specific time range, with optional pixel-precise cropping (width/height/X/Y) applied at the same time — trimmed output is always exported as MP4.