Developer Releases 30+ Single-File Browser Tools That Process Data Locally

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A developer has built a collection of over 30 single-file HTML tools, all available free at goodyuanbo.github.io, designed to run entirely in the user's browser without uploading any data to external servers. Each tool is a standalone .html file that uses JavaScript to process everything locally, requiring no accounts, logins, or internet connection after the page loads. The toolkit covers a wide range of use cases including CSV dashboards, finance calculators, password generation, subtitle editing, JWT decoding, and resume keyword matching. The developer chose the single-file format deliberately so tools remain functional offline and are not subject to service shutdowns or dependency changes. Downloadable offline versions with additional features such as batch mode and dark mode are available for purchase, with a discounted bundle option.

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