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We believe your files should never leave your device. Toolzum brings server-grade processing to your browser via WebAssembly — zero uploads, zero data retention, zero compromise.
The Browser is the Data Center.
Every tool compiles to WebAssembly and executes on your machine. No server racks, no cloud bills, no data leaving your device.
Built by a solo developer who was tired of uploading confidential PDFs and images to random cloud servers just to compress or convert them. So I built 905+ toolsthat never touch a server. The browser is all you need.
Bootstrapped. Zero VC funding. Zero servers. Zero compromises.
Every other online tool asks you to upload files to their server. They process it, then promise to delete it. That 2-hour deletion window is a liability — a breach waiting to happen. Toolzum eliminates the server entirely. Your file loads into your browser, gets processed locally, and downloads directly. There is no server copy to delete because there was never an upload.
When you load Toolzum, all tool compilers execute exclusively inside your browser's sandboxed worker thread. No metadata trackers, no temporary folders, and zero risk of file leakage.
We compile industry-standard processing libraries into WebAssembly binaries that run at near-native speed directly in your browser — Chrome, Safari, Firefox, or Edge. No plugins, no installs.
After the initial load, Toolzum requires no internet connection for most operations. Perfect for off-grid work, air-gapped networks, and environments where data cannot leave the premises.
We are always looking for ideas to improve. Reach out and tell us what you would like to see next.