About DataToolsLab

Free, fast, and privacy-first browser-based developer tools. Convert CSV, manipulate PDFs, format JSON — all without uploading your files.

What we believe

Developer tools should be fast, private, and free. That's why every tool on DataToolsLab runs entirely in your browser. We never see — and never store — the files you process.

How tools are built

PDF tooling uses pdf-lib and pdfjs-dist. Other tools use plain JavaScript and standard browser APIs. The whole site is statically generated and works offline once you've visited a page.

Open data

Every tool, guide, and category is defined in a single registry so the navigation, search index, sitemap, and related-tools list all stay in sync automatically.