Compress video without losing quality
There’s no such thing as truly zero loss — but you can get close enough that the eye can’t tell. Keep your resolution, shed only the bitrate you’re wasting, and compress entirely in your browser.
Drop a video here, or browse
MP4 · MOV · WebM — compressed right here, nothing uploaded
100% on-device · no signup · no watermark
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Bigger files take longer — your CPU does the work, privately.
What “without losing quality” really means
Every common video codec — H.264, HEVC, VP9 — is lossy, so compressing always discards some data. The honest goal isn’t zero loss; it’s visually lossless: shedding the bitrate your eye can’t see while keeping everything it can. Most footage carries far more bitrate than it needs, which is exactly the slack a good compressor removes first.
Two rules protect quality: keep the original resolution (downscaling is what makes video look soft), and re-encode only once at a generous bitrate. This tool keeps your resolution by default and lets you aim for a high-quality target rather than the smallest possible file.
Settings for the least visible loss
Start from the “YouTube / quality” preset — it targets quality instead of a hard size cap and keeps up to 1080p. If you also need to fit a size limit, choose the largest target your destination allows; the more bitrate you give the encoder, the closer to the original it stays.
Avoid compressing an already-compressed export a second time, and don’t downscale unless you have to. If you must shrink a 4K clip hard, dropping it to 1080p for phone viewing loses far less that’s visible than crushing the bitrate at full 4K.
Frequently asked questions
Can you compress a video without losing any quality at all?
Not literally — every standard video codec is lossy, so some data is always discarded. What you can do is make the loss invisible: keep the resolution and trim only the bitrate your eye won’t miss. The result looks the same while being much smaller.
How do I keep quality when compressing?
Keep the original resolution, pick the largest target size your destination allows, and re-encode only once. Use the quality preset rather than forcing a tiny file — downscaling and over-shrinking are what make video look soft.
Why did my video look worse after compressing elsewhere?
Usually because the tool downscaled the resolution, set the bitrate too low for the clip’s length, or compressed an already-compressed file a second time. Keeping resolution and using a generous target avoids all three.
Is my video uploaded?
No. Compression runs entirely in your browser on your own device — nothing is uploaded, and you can go offline once the page has loaded.