Quality control
Choose a smaller, balanced, or higher-quality output.
VoysumPrivate browser tool
Video Compressor
Reduce MP4 file size on your device with a quality slider and optional resolution limit.
No uploadNo accountFree to use
✓ Runs locally in your browser
↥Choose or drop a filevideo/mp4, .mp4 · up to 500 MB
🔒 Your media file is never uploaded to Voysum.
Private by default
Useful conversion without giving up your file.
Optional resizing
Limit video width to reduce size further.
No cloud processing
Video remains in browser memory.
Common questions
Video Compressor FAQ
How local browser processing works and what to expect.
Why can compression take time?
Video encoding is computationally intensive and runs on your device CPU.
Will every result be smaller?
Usually, but already optimized source videos may not shrink substantially.
Keep working
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Resize Video
Change MP4 video width locally while preserving aspect ratio.
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Mute an MP4 by removing its audio track locally in your browser.
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Convert a short video clip to GIF locally in your browser.
Open tool →Turn your audio into a searchable transcript.
Voysum can transcribe the converted recording and create subtitle files.
Transcribe audio