Free Online Developer Tools
JSON Extractor
Format, validate, minify, and extract data from JSON. A complete toolkit for working with JSON data efficiently.
Launch ToolEncoding Tools
Base64, URL, Hex encode/decode. Essential encoding utilities for developers.
Launch ToolText Diff
Compare two texts side-by-side with line-level and inline character diff highlighting.
Launch ToolRegex Tester
Test regular expressions in real-time with visual matching, capture groups, and replace mode.
Launch ToolJWT Decoder
Decode and inspect JSON Web Tokens. View header, payload, claims, and token expiration status.
Launch ToolHash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes. Hash text and files with instant comparison.
Launch ToolUUID / ULID Generator
Generate UUID v4, v7, and ULID. Bulk generation up to 100, validation, and version detection.
Launch ToolTimestamp Converter
Convert Unix timestamps to human-readable dates and back. Live clock, UTC, local time, and relative time display.
Launch ToolLorem Ipsum Generator
Generate Lorem Ipsum placeholder text. Choose paragraphs, sentences, or words. HTML wrap option included.
Launch ToolColor Converter
Convert colors between HEX, RGB, and HSL formats instantly. Color picker, live preview, and preset palette.
Launch ToolWord Counter
Count words, characters, sentences, and paragraphs instantly. Estimate reading time and check social media character limits.
Launch ToolQR Code Generator
Generate QR codes from any text or URL instantly. Adjust size and error correction level. Download as PNG.
Launch ToolPassword Generator
Generate strong random passwords instantly. Check password strength with entropy analysis, or create memorable passphrases. Uses crypto.getRandomValues.
Launch ToolMarkdown Editor
Live Markdown preview with side-by-side HTML output. GitHub Flavored Markdown, syntax-highlighted code blocks, file drag & drop, and a cheat sheet.
Launch Tool