Conversion tool · Free · No sign-up
Video Compressor
Compress MP4 and WebM videos directly in your browser.
About this tool
Compress videos directly in your browser using WebAssembly. This tool fetches a lightweight FFmpeg engine on-demand, meaning your video never leaves your device and your browser stays fast. Perfect for shrinking video files for email attachments or web embeds.
Key features
100% Private
Videos are processed locally in your browser. No server uploads.
On-Demand Engine
The FFmpeg engine loads instantly via CDN only when you click compress.
Format Support
Easily compress MP4, WebM, and MOV files to smaller sizes.
How to use it
- 1Click the upload area and select a video file (MP4, WebM, etc.).
- 2Click the 'Load Engine & Compress' button (this fetches the FFmpeg library).
- 3Wait for the progress bar to reach 100%.
- 4Click Download to save your compressed video.
Common use cases
- Shrinking a video file to send via email.
- Optimizing a video for a website landing page.
- Reducing file size before uploading to social media.
Frequently asked questions
Why does it take a moment to start compressing?
The tool lazily loads a ~25MB FFmpeg WebAssembly engine from a CDN on first use. This keeps our website fast for everyone else, but gives you full video processing power when you need it.
Are my videos uploaded to a server?
No. The compression happens 100% locally in your browser using WebAssembly. Your files are completely private.
What compression settings are used?
We use H.264 video encoding with a CRF (Constant Rate Factor) of 28, which provides an excellent balance between file size reduction and visual quality.
Private and free. Most of our tools run entirely in your browser, so the data you enter isn't uploaded or stored. There's no sign-up, and there never will be — they're built by the Fusion Trail Solutions team to be genuinely useful.
Need a custom tool or web app?
We design and build production-grade web apps, internal tools and SaaS platforms. Tell us what you need.
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