Developer
Everyday developer helpers: regex, JWT, cron, SQL formatting and more.
10 tools
JWT Decoder
Decode a JWT’s header and payload, explain standard claims like exp and iat, and see whether it has expired. Decodes only; never verifies or uploads.Regex Tester
Test JavaScript regular expressions live: highlight matches, list groups, preview replacements, with a syntax explainer and common patterns.Text Diff
Compare two texts side by side or inline, with changed words highlighted, ignore whitespace or case, and copy a unified patch.Cron Parser
Explain a cron expression in plain words, field by field, and list its next 10 run times in any time zone.SQL Formatter
Beautify messy SQL queries for MySQL, PostgreSQL, SQL Server, SQLite, BigQuery and more, with keyword case and indent options.URL Parser
Break a URL into scheme, host, port, path, query parameters and fragment, with IDN support and an editor that rebuilds the URL.Chmod Calculator
Tick read, write and execute boxes to convert Unix permissions between octal (755, 644) and rwxr-xr-x, with ready-to-run chmod commands.String Escape
Escape and unescape text for JSON, JavaScript, HTML, XML, CSV, SQL, shell and regex string literals, with error positions.Slug Generator
Turn titles into URL slugs: strip accents, choose the separator and maximum length, and keep or drop Chinese characters.Meta Tag Generator
Fill in a title, description and share image to generate SEO, Open Graph and Twitter card tags, with search result and social card previews.