Shrink a video for email, WhatsApp or uploads — without sending it to a server.
Compression runs 100% in your browser, so your video never leaves your device. In-browser encoding is best for clips up to about 200 MB; larger files may run out of browser memory. On first use the video engine (about 32 MB) downloads once and is cached.
Compress a video to a smaller MP4 right in your browser — no upload, no sign-up, no watermark. Pick a quality preset, optionally cap the resolution at 720p, and download the result with before-and-after sizes.
A 60-second 1080p phone clip of about 95 MB typically compresses to roughly 20–30 MB on the Balanced preset — small enough for email and most upload forms — and to under 10 MB with the Small file preset plus the 720p cap.
The video is re-encoded in your browser by the FFmpeg encoder compiled to WebAssembly. H.264 video is written at a constant quality (CRF): lower CRF values keep more quality and produce larger files, higher values compress harder. Audio is re-encoded to AAC at 128 kbps when present. Nothing is uploaded: the file is read from your device, processed in browser memory and handed back as a download.
No. Compression happens entirely in your browser with WebAssembly. Your video never leaves your device, so private clips stay private.
Balanced suits most sharing. Choose High quality for archives and Small file when a platform enforces a size limit. Adding the 720p cap shrinks files far more than any preset alone when the original is 1080p or 4K.
Your browser is doing the same work a video app would, on one processing thread for maximum compatibility. Short clips finish quickly; long or 4K videos can take several minutes. Keep the tab open and in the foreground while it works.
Yes — the result is a standard MP4 with H.264 video and AAC audio, the most widely supported combination for phones, browsers, WhatsApp, email and upload forms.
There is no hard-coded limit, but browser memory is the ceiling: files above roughly 200 MB often fail, particularly on mobile. Trim the clip or split it into parts first if you hit that wall.