Compress Video Without Uploading
Your video never leaves your device. This tool runs ffmpeg entirely in your browser using WebAssembly — no server, no cloud, no privacy concerns.
Powered by ffmpeg.wasm - runs entirely in your browser
How browser-based compression works
When you drop a file into this tool, it is loaded into your browser's memory using the File API. ffmpeg.wasm (a WebAssembly port of FFmpeg) runs the H.264 encoding entirely within JavaScript. No network requests are made with your video data.
How to Get Started
Key Features
Zero uploads
No network traffic with your video data. Verified by opening DevTools Network tab.
GDPR friendly
No personal data (video content) ever leaves your device.
Works offline after load
Once the page loads, compression works even without internet.
Always free
No subscription, no credits. Free because server costs are zero.
Frequently Asked Questions
How do I verify no upload is happening?
Open Chrome DevTools (F12) > Network tab. Filter by "video" or check all requests. You'll see no upload requests when compressing.
Is this safe for confidential videos?
Yes. For business meetings, medical content, or personal videos, this is safer than cloud-based compressors.
What about the tool-site cookies?
The tool uses minimal cookies. No video data or metadata is transmitted.
Can I use this on a corporate network?
Yes. Since no video data is uploaded, corporate IT policies around data upload don't apply.
Related
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