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Toolphin is a free collection of 10+ developer utilities that run entirely in your browser. No server calls, no sign-ups, no tracking - your data never leaves the page. Tools include: JSON Formatter, Base64 Codec, URL Encoder/Decoder, Hash Generator, Timestamp Converter, Color Picker, Markdown Preview, Regex Tester, JWT Decoder, and Text Diff. Built with Next.js and designed to be fast, accessible, and mobile-friendly.