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All dev tools JSON formatter Base64 encoder decoder URL encoder decoder Regex creator Regex tester UUID generator JWT decoder Timestamp converter HTML entity encoder decoder JSON to CSV converter Text diff checker
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Dev section

Dev tools

Explore browser-based dev utilities designed for fast checks, transformations, debugging and copy-paste workflows.

JSON formatterFormat, pretty-print, validate and minify JSON in a clean split view. Base64 encoder decoderTurn plain text into Base64 and decode it back locally. URL encoder decoderEncode query parts, decode URLs and check safe character sets. Regex creatorBuild regular expressions from simple inputs and common options. Regex testerTest patterns, flags and matches against real text samples. UUID generatorGenerate multiple UUID v4 values for IDs, testing and seed data. JWT decoderDecode JWT headers and payloads without sending tokens to a server. Timestamp converterConvert Unix timestamps into readable dates and back again. HTML entity encoder decoderEscape or restore HTML entities for snippets, content and debugging. JSON to CSV converterFlatten JSON arrays into CSV ready to export or paste into sheets. Text diff checkerCompare two text blocks and highlight line-level changes fast.