Shrink massive video files for easy sharing.
Drag & Drop files here
Up to 2GB · 5 files / batch
MP4, MOV, WebM, MKV, AVI, GIF.
Add a large clip and move the quality slider. The compressor re-encodes locally to shrink file size while you preview progress. The tool requires an initial, one-time download of a local processing engine (Web Worker). This may take a few moments depending on internet speed, but ensures zero server uploads and total privacy.
Conversions run in your tab with JavaScript — no desktop app required.
Files stay on your device during processing. We do not receive your uploads.
Heavy codecs and AI models run locally via Web Workers and WASM (FFmpeg.wasm, Transformers.js).
Add a large clip and move the quality slider. The compressor re-encodes locally to shrink file size while you preview progress. The tool requires an initial, one-time download of a local processing engine (Web Worker). This may take a few moments depending on internet speed, but ensures zero server uploads and total privacy.
Heavy compression introduces artifacts. Extremely large inputs may fail on low-RAM devices. Processing is 100% offline in your browser — files never leave your device.
Yes. This tool is free convert online with no signup. Processing stays in your browser — no uploads.
You control quality settings. Choose higher quality for no quality loss when converting online.
Every conversion runs inside your browser tab using JavaScript and Web Workers. There is no background server queue and no account is required for core tools.
Your files are never uploaded to FreeConvertKit for processing. Originals, previews, and exports stay on your device unless you choose to download or share them yourself.
When codecs or AI models are needed, WebAssembly modules such as FFmpeg.wasm and Transformers.js execute locally — giving you desktop-class power with absolute file privacy.
Pack a clip small enough to send as an attachment.
Convert MP4 videos to WebM with a quality slider.