I built a media compressor that runs 100% in your browser (No uploads, no limits)

The Problem
I’ve always been annoyed by "free" online video compressors. Most of them have strict 50MB limits, make you wait in a "queue," or—worst of all—require you to upload your private videos to their servers just to shrink them.

I wanted a way to compress videos for Discord, Slack, or Email without the privacy risk or the slow upload speeds.

The Solution
I built LocalSquash.

It’s a simple, minimalist web tool that handles video, audio, and image compression/conversion. The "secret sauce" is that it uses FFmpeg.wasm. This means all the heavy lifting happens directly in your browser using your computer's CPU.

Why I think it’s useful:

• 100% Private: Your files never leave your computer. You can even turn off your internet after the page loads, and it will still work.

• No Limits: No "file size too large" errors (as long as your RAM can handle it).

• Fast: No waiting for a 200MB file to upload to a server before the processing starts.

• Clean: No ads, no tracking, no "Pro" upsells.

The Tech Stack

• Engine: FFmpeg.wasm (WebAssembly)

• Frontend: Next.js

• Hosting: Cloudflare Pages

What's next?
This started as a side project for my own use, but I’d love to know what the IH community thinks.

• Does the UI feel intuitive?

• Are there specific formats you'd like to see?

• Are there any bugs you run into?

Check it out here: https://localsquash.com