← Kaira Prime toolskairaprime.com/tools/video-compress

Compress video — smaller MP4/WebM/MOV, same player

Shrink a video with H.264, a quality slider, and an optional resolution downscale — right here in your browser. See the before/after size before you download.

Every feature. No limits. No sign-up. No watermark. Nothing uploaded. Free forever. It runs 100% in your browser via ffmpeg.wasm — your video is processed on your own device and never touches a server, so there is nothing to upload, nothing to unlock, and nothing to pay for.

Media never uploaded. Compression happens locally using WebAssembly ffmpeg — the same engine, running in your tab.

Drop a video here, or click to choose MP4 · WebM · MOV · one file at a time

Quality & resolution

Quality (CRF) 23

Best (18)Smallest (32)

Resolution

Mute audio (remove track)

Loading engine…0%

First use downloads the ~30MB engine once, then it's cached.

Compressing…0%

Download compressed video

A free tool by Kaira Prime — an independent software studio. Built local-first, like everything we make. Every feature. No limits. No sign-up. No watermark. Nothing uploaded. Free forever. More free, in-browser tools: kairaprime.com/tools →