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We believe your files should never leave your device. Toolzum brings server-grade processing to your browser via WebAssembly — 1026 tools run entirely on your device, zero uploads required.
The Browser is the Data Center.
Most tools compile to WebAssembly and execute 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 1065+ tools— 1026 run entirely in your browser, no server needed.
Bootstrapped. Zero VC funding. Privacy-first by design.
Traditional online tools ask you to upload files to their server. Toolzum flips that model — 1026 of our 1065 tools process entirely in your browser. Your file loads into browser memory, gets processed locally, and downloads directly. Cloud AI tools (36) are clearly marked so you always know what happens with your data.
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 and environments with restricted network access.
We are always looking for ideas to improve. Reach out and tell us what you would like to see next.