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● Files never leave your device Compress video without uploading
Make a video smaller by reducing its resolution and/or bitrate. havenConverter re-encodes locally — on capable browsers using your hardware encoder — and shows the output size as you adjust the settings.
Everything happens in this browser tab on your own device — your video is never uploaded to a server, so even multi-gigabyte files stay private. There’s no file-size limit beyond what your device can handle, and no watermark on the output.
How to
- Add your video. Drop the video you want to compress into havenConverter.
- Lower the settings. Drop the resolution (e.g. 1080p → 720p) and/or pick a lower quality preset or bitrate.
- Export. Export and save — the file will be noticeably smaller.
Frequently asked questions
- Will compressing reduce quality?
- Lower bitrates trade quality for size. Use the live output-size readout and preview to find a balance you like.
- Is there a file-size limit?
- No fixed limit — large 4K files are the normal case. Processing streams to keep memory in check.
- Is it really private?
- Yes — the file never leaves your device. There is no server to upload to.
Guides
Compress a video for WhatsApp — no app, no uploadConvert 4K to 1080p on a Mac — free, no installMOV to MP4 — without uploadingReduce video size for email — under 25 MB
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