Dev Tools Suite
30 developer tools in one page. JSON, JWT, regex, cron parser, diff checker, markdown preview, code beautifier, password generator, and more. Everything runs in your browser — nothing uploaded, nothing stored.
JSON Formatter & Validator
Paste JSON to format, minify, or validate. Syntax errors are highlighted with line numbers.
Base64 Encode / Decode
Convert text to and from Base64 encoding. Supports UTF-8 characters.
URL Encode / Decode
Encode or decode URL components. Handles special characters, spaces, and unicode.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text input. SHA hashes use the Web Crypto API.
UUID Generator
Generate cryptographically random v4 UUIDs. Bulk generate up to 1000 at once.
JWT Decoder
Paste a JSON Web Token to decode its header and payload. Shows expiration status.
Color Converter
Convert between HEX, RGB, and HSL color formats with a live preview swatch.
Regex Tester
Test regular expressions against a string. Matches are highlighted and capture groups are listed.
Timestamp Converter
Convert between Unix timestamps and human-readable dates. Live current timestamp updates every second.
Lorem Ipsum Generator
Generate placeholder text by paragraphs, sentences, or words.
Cron Expression Parser
Paste a standard 5-field cron expression (minute hour day-of-month month day-of-week) to see a human-readable description and the next 10 run times.
Diff Checker
Compare two blocks of text line by line. Additions, deletions, and unchanged lines are color-coded.
Markdown Preview
Live preview of Markdown. Supports headers, bold, italic, code, links, images, lists, blockquotes, horizontal rules, and tables.
Code Beautifier & Minifier
Format or minify HTML, CSS, JavaScript, XML, and SQL. Best-effort indentation using a bracket-aware formatter.
CSV ↔ JSON Converter
Convert between CSV and JSON. CSV must have a header row. Handles quoted values and commas inside quotes.
String Case Converter
Convert text between camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, Title Case, and more.
Character & Word Counter
Real-time character, word, line, sentence, paragraph counts and reading time estimates.
Text Sorter, Dedupe & Shuffle
Sort lines alphabetically, numerically, or reverse. Remove duplicates, shuffle, trim whitespace, and more.
Unix Permissions (chmod) Calculator
Click checkboxes or type the octal value. Read=4, Write=2, Execute=1.
| Read | Write | Execute | |
| Owner | |||
| Group | |||
| Other |
HTTP Status Code Reference
Complete list of HTTP status codes with descriptions. Filter by category or search by code or name.
User Agent Parser
Parse a User-Agent string to detect browser, OS, and device. Click "Use Mine" to parse your current browser's UA.
CIDR Subnet Calculator
Enter an IPv4 address in CIDR notation to calculate network, broadcast, first/last host, usable hosts, and netmask.
Text Escape & Unescape
Escape or unescape text for HTML entities, JavaScript strings, SQL, XML, and CSV.
Image → Base64
Drop or select an image to convert it to a Base64 data URI. Runs entirely in your browser — nothing is uploaded.
Password Generator
Generate cryptographically random passwords. Uses crypto.getRandomValues.
Number Base Converter
Convert between binary (base 2), octal (base 8), decimal (base 10), and hexadecimal (base 16). Supports integers up to 2^53.
ASCII Table Reference
Complete 0-127 ASCII character table with decimal, hex, octal, binary, and HTML entity. Click any row to copy the character.
Favicon Generator
Generate a simple favicon from text or an emoji. Outputs a PNG data URI you can drop into <link rel="icon">.
CSS Gradient Generator
Build a linear or radial CSS gradient. Live preview and copy-ready CSS.
URL Slug Generator
Convert text to URL-friendly slugs. Handles unicode, diacritics, and special characters.
Thought+Form
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