32 fast, free, browser-based tools for developers and everyone. Nothing leaves your device.
Format, validate, and minify JSON. Highlight syntax errors instantly.
Decode and inspect JWT tokens — header, payload, and signature.
Test regular expressions with live match highlighting and flags.
Generate v4 UUIDs in bulk. Copy one or all at once.
Parse cron expressions into human-readable schedules.
Convert between HEX, RGB, HSL, and CSS color formats.
Compare two texts side-by-side and highlight what changed.
Convert text to camelCase, snake_case, PascalCase, kebab-case, UPPER, lower.
Count words, characters, sentences, paragraphs, and reading time.
Generate placeholder text by words, sentences, or paragraphs.
Write Markdown and see the live rendered HTML preview.
Escape or unescape strings for JSON, HTML, URL, and SQL.
Generate strong, random passwords with custom length and character sets.
Generate MD5, SHA-1, SHA-256, SHA-512 hashes from any text.
Hash passwords with bcrypt and verify hashes — all in your browser.
Encode and decode text or files to/from Base64.
Convert between JSON and YAML formats instantly.
Convert CSV data to JSON and back with column mapping.
Convert between Unix timestamps and human-readable dates.
Convert numbers between binary, octal, decimal, and hexadecimal.
Encode and decode URLs and query strings.
Encode/decode HTML entities like & < >
Look up geolocation, ISP, and info for any IP address.
Quick reference for all HTTP status codes with descriptions.
Break a URL into its components — protocol, host, path, params.
Generate QR codes for any URL, text, email, or phone number.
Paste SVG markup to preview it and inspect its dimensions.
Calculate percentages, percentage changes, and percentage of totals.
Convert length, weight, temperature, volume, and area units.
Paste any text and get it rewritten for clarity, tone, or brevity.
Describe what you want to match in plain English — get a regex.
Paste broken JSON and AI will repair and explain what was wrong.