🎬 Video Compressor
Shrink MP4, WebM and MOV videos right in your browser by lowering the resolution and bitrate — no upload, no watermark, no software. Free, private & best for short clips.
Shrink a video by lowering its resolution and bitrate — right in your browser. Processing runs in real time, so it works best on clips up to a few minutes.
Compress Video Without the Cloud
Real compression, clear controls and honest stats — all without a single frame leaving your browser.
No Upload, No Watermark
Your video is compressed entirely in your browser and never leaves your device — and the result is clean, with no watermark.
Resolution & Quality
Drop to 720p or 480p and pick High, Balanced or Small — the two biggest levers for shrinking a video.
Live Size Estimate
See the expected output dimensions and file size before you commit, so there are no surprises.
Preview Before Saving
Watch the compressed video right in the page and compare sizes before you download it.
Before/After Stats
See the percentage saved plus original vs new resolution and bitrate at a glance.
Works Everywhere
Responsive down to 280px with full dark mode — though desktop browsers handle big videos best.
How to Compress a Video
Four steps — though the compression itself runs in real time.
Add a video
Drag and drop or tap to choose an MP4, WebM or MOV — its details appear right away.
Pick resolution & quality
Lower the resolution and choose a quality preset; the estimated output size updates live.
Compress
Hit Compress and let it re-encode — it runs in real time, so keep the tab open.
Preview & download
Check the compressed preview and the size saved, then download your smaller video.
Frequently Asked Questions
How it works, privacy, how much smaller, formats, processing time, quality, and size limits.
How does this video compressor work?
It re-encodes your video right in the browser: it plays the clip through an off-screen canvas at your chosen resolution and re-records it at a lower bitrate, which is what shrinks the file. Because it processes in real time, compressing takes roughly as long as the video is — so it's ideal for short clips up to a few minutes.
Is my video uploaded anywhere?
No. Everything happens on your device using your browser's built-in video recorder — your video is never uploaded to any server, and there's no watermark. That makes it safe for personal clips, and it even works offline once the page has loaded.
How much smaller will my video get?
It depends on the original, but big savings are common. Dropping a 1080p phone clip to 720p at the Balanced preset often cuts the file by 60–80%, because phones record at very high bitrates. Lower the resolution or pick the Small preset for an even smaller file.
What video formats does it support?
It reads common formats your browser can play — MP4, WebM and usually MOV. The compressed output is MP4 or WebM depending on which your browser can record (Chrome and Edge often produce WebM; Safari produces MP4). Either plays in modern players and browsers.
Why does compressing take so long?
Unlike trimming, real compression has to re-encode every frame. This tool does that by playing the video through in real time, so a two-minute clip takes about two minutes. It's the trade-off for doing everything privately in your browser instead of on a server. Keep the tab open while it runs.
Will the quality drop?
Some, yes — compression always trades a little quality for a smaller size. The Balanced preset is tuned so the difference is hard to notice for most footage, while Small favours size over sharpness. You can preview the result before downloading and re-compress with different settings if needed.
What's the difference between resolution and quality here?
Resolution is the pixel size of the video (like 720p). Quality sets the bitrate — how much data each second of video gets. Lowering resolution removes pixels; lowering quality keeps the pixels but describes them with less data. Combining a smaller resolution with a lower quality preset gives the biggest savings.
Is there a file size or length limit?
There's no hard limit, but long or very large videos use a lot of memory and take a long time to process in real time, and some browsers struggle with huge files. For the smoothest experience, stick to clips of a few minutes; for hour-long videos a desktop application will be faster.