Developer Tools
Online developer utilities that run in your browser: Base64 and URL encoding, a regex tester, a JWT decoder, and UUID and hash generators — handy for quick encoding, debugging and testing without installing anything.
Checksum Calculator
Hash any file with 6 algorithms. Verify downloads, compare files, find duplicates.
JSON Formatter
Beautify, minify, and validate JSON in the browser. Live error line/column, 2/4/Tab indent. Free, no signup.
Text Diff
Compare two texts side by side. Line, word and character-level diff with insertion/deletion highlighting. Free, in your browser.
Cron Parser
Parse and explain cron expressions. See the next 10 run times in your timezone, with human-readable description and field breakdown.
Slug Generator
Generate URL-friendly slugs from text. Transliterate Cyrillic and Latin diacritics, choose separator, strip stop words, set max length.
Query String
Parse, edit and build URL query strings. Visual table editor, automatic encode/decode, array notation, JSON export.
JSON ↔ CSV
Convert between JSON arrays and CSV files. Auto-detect direction, configurable delimiter, type coercion, header row toggle. Free, in browser.
HTML Formatter
Beautify or minify HTML in your browser. Indent options, comment removal, void-element handling, preserves <pre>/<script>/<style> content.
MD File Viewer and Editor
Open an .md file and read it as a finished document. Edit, build tables, jump by outline, save to PDF, Word or HTML — in your browser.
YAML Formatter
Format, validate, and convert YAML in your browser. YAML ↔ JSON bidirectional, indent options, multi-document support.
Base64
Encode and decode Base64 in the browser. UTF-8 safe, URL-safe variant, file uploads. Auto-detect direction. Free.
URL Encoder
Encode and decode URL strings in the browser. Component vs full-URL mode, + for space, auto-detect. Free.
Regex Tester
Test JavaScript regular expressions in the browser. Highlight matches, see groups, preview replacement. Free.
JWT Decoder
Decode and inspect JSON Web Tokens in the browser. Header, payload, expiry, claims explained. No signing. Free.
UUID Generator
Generate UUID v4 (random), v7 (time-ordered), v1 (timestamp) or Nil UUIDs in your browser. Bulk, formatted, validated. Free.
Hash Generator
Calculate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 hashes for text or files in your browser. HMAC, hex or base64.
Hash Identifier
Identify the algorithm behind any hash: MD5, SHA-256, bcrypt, Argon2, NTLM and 50+ more. Ranked matches with hashcat & John modes. Free.
Font converter
Convert TTF, OTF, WOFF and WOFF2 in any direction, subset by language, pin variable axes and repair vertical metrics. Runs in the browser.
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