Drop your input and pick the compression level - higher levels trade quality for byte savings. Choose Smaller file for the biggest size reduction, Balanced for everyday sharing, or Higher quality when you want to keep as much detail as possible while still shrinking the file. The output keeps your original file extension and downloads with a "-compressed" suffix once FFmpeg.wasm finishes re-encoding it in this tab. Only video files are accepted here - an audio-only upload shows a clear error instead of a broken result.
Video Compressor
Reduce the byte size of a video file in the browser.
Pick one of three compression levels - Smaller file, Balanced, or Higher quality - before choosing your video. The output keeps the same file type as your input, just smaller, with the filename suffixed "-compressed".
Which codec the re-encode uses depends on your input's container: mp4, mov, avi, and mkv files re-encode with H.264 video and AAC audio, while webm files re-encode with VP9 video and Opus audio - each container keeps its own native codec pairing rather than being forced onto a single codec.
The whole re-encode runs locally using FFmpeg.wasm, entirely in this browser tab, so your video is never uploaded to a server. Because it runs single-threaded on your device rather than a server, large 4K or high-bitrate files can take several minutes.
Compression always re-encodes the video, so there is some quality loss even at the Higher-quality setting, and there is no control for an exact target file size or bitrate - only the three fixed levels. If you only need to cut a clip or drop the audio track with no quality loss at all, use the trim or strip-audio tools instead.
Output is downloadable immediately after processing.
Original input is not retained beyond the page session.
Frequently Asked Questions
What does Video Compressor do?
Reduce the byte size of a video file in the browser.
When should I reach for video compressor?
Output is downloadable immediately after processing.
What complementary tools work well alongside video compressor?
For format conversion, see the related-tools section.