Free Developer Tools — 17 offline workbench utilities

Format and validate JSON, convert CSV/XML, encode Base64, hash with SHA-256, and test regex — every developer tool computes offline so tokens and payloads stay on your machine.

All 17 tools

• JSON Formatter — Beautify with 2/4-space indentation, minify, and validate JSON payloads.
• CSV ⇄ JSON — Bidirectional parser between CSV tables and structured JSON arrays.
• Base64 & Hex — Encode and decode strings into Base64 and Hex formats with full UTF-8 support.
• Crypto Hashes — Generate SHA-1, SHA-256, SHA-384, and SHA-512 cryptographic digests via WebCrypto.
• String Inspector — Analyze words, characters, lines, and UTF-8 bytes — with case transforms and reversal.
• Regex Tester — Test regular expressions against text with flags, capture groups, presets, and one-click match extraction.
• YAML ↔ JSON — Convert YAML to JSON and back — nested maps, lists, comments, and typed scalars supported.
• JSON ↔ CSV — Flatten nested JSON arrays into CSV tables and parse CSV back into JSON objects.
• UUID Generator — Generate RFC 4122 v4 (random) and RFC 9562 v7 (time-ordered) UUIDs locally in bulk with multiple formats.
• URL Encoder — Percent-encode and decode URLs and query strings with encodeURIComponent / encodeURI semantics.
• SQL Formatter — Beautify messy SQL with clause-aware formatting, customizable keyword casing, and query minification.
• Diff Checker — Compare two blocks of text line-by-line with a unified LCS diff — additions, removals, similarity stats, and whitespace filters.
• Unix Timestamp — Convert between Unix timestamps (seconds/milliseconds) and human-readable dates in UTC and local time.
• Case Converter — Convert text between UPPERCASE, lowercase, Title, camelCase, PascalCase, snake_case, kebab-case, and CONSTANT_CASE.
• HTML Entities — Escape text into named or numeric HTML entities for safe embedding, and decode entities back to characters.
• PyQt5 → PyQt6 Migrator — Automatically convert Python code from PyQt5 to PyQt6. Migrate single files or entire projects with folder preservation for Pro.
• OpenGraph & Social Card Studio — Preview, audit, and design 1200×630 OpenGraph cards for Twitter/X, Facebook, LinkedIn, Discord & WhatsApp.