Shrink a video to a fraction of its size for email, WhatsApp or upload limits — without uploading it anywhere first.
Drag in an MP4 or MOV. It opens instantly because there is no upload — the work happens on your device.
Three honest presets and an optional resolution drop, with a live estimate of the output size before you export.
Real progress with a live fps counter — no fake spinner. The compressed MP4 downloads straight to your device.
Uploading a 500 MB video just to shrink it is absurd — half the job is moving the file. Zimblu starts compressing the moment you drop it.
Family videos, work recordings, screen captures — none of it leaves your machine. We never see a single frame.
No account, no watermark, no resolution cap behind a paywall. The download button just works.
No. Compression runs inside your browser on your own device — the file never touches a server. That's also why it starts instantly: there is no upload to wait for.
It depends on the source, but phone footage typically shrinks to between a quarter and half of its original size on the Balanced preset, and far more with Smallest file or a lower resolution. Zimblu shows a live size estimate before you export.
The presets are tuned so the result still looks good for its purpose: High quality is hard to tell from the original, Balanced is ideal for sharing in chat apps, Smallest file prioritises size for strict upload limits. You choose the trade-off, and audio is copied untouched.
Yes — you can keep the original resolution or downscale to 1080p or 720p. Dropping a 4K phone video to 1080p alone saves enormous space with little visible difference on most screens.
MP4 and MOV with H.264 or HEVC video — phone recordings, screen captures and camera footage. The output is a standard MP4 that plays everywhere. Files up to about 1 GB or 15 minutes are comfortable in the browser.