Launching today

OnlineToolHubs

Launching today

325 free tools, with 309 running privately in your browser

1 follower

325 free tools, with 309 running privately in your browser

1 follower

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OnlineToolHubs is a collection of 325 free calculators, converters, PDF tools, and developer utilities. 309 run entirely in the browser, so documents, code, and calculations stay on the user's device. There are no accounts, downloads, paid tiers, or usage limits. Each calculator explains its formula, assumptions, sources, and limitations.

Free

Launch tags:Developer Tools

Launch Team

Context.devAPI to scrape anything for AI, 20,000+ developers trust us.

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Maker

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I built OnlineToolHubs to make common one-minute tasks quick without requiring uploads, accounts, or software installations. The main technical choice was to keep processing on-device whenever possible: 309 of 325 tools run entirely in the browser. That matters for PDFs, tokens, code snippets and financial inputs. Each calculator also shows the formula and limitations so results can be checked rather than merely trusted. Feedback on missing tools and edge cases is welcome.

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2d ago