Programming
Everyday developer utilities — JSON formatting, encoding conversion, hashing, regex and more.
Convert and format JSON, XML, YAML and CSV; encode and decode Base64, Base32, Base58 and Base85; decode JWTs; work out when a cron expression next fires; translate chmod between octal and rwx; calculate IP subnets; parse User-Agent strings; and generate CSS grid, flexbox and gradient declarations. These cover the small "let me just check this" moments in the middle of a task. Everything is processed locally in the browser, so pasting in a token or an internal config value does not send it anywhere — which makes these a reasonable substitute when pasting company data into an online service would be inappropriate.
What people use these for
- Pretty-print an API response to read what came back
- Decode a JWT or Base64 blob on the spot
- Confirm when a cron expression will next run
- Get the network address and usable host count from CIDR notation
Tools in this category (81)
- ✨ CSS Formatter
- 🔌 Port Number Reference
- 🔤 ASCII Table
- 🎨 Color Picker
- 🧩 JSON Formatter
- 🔐 Base64 Encode/Decode
- 🆔 UUID Generator
- 🔒 Hash Generator
- 🧪 Regex Tester
- ⏰ Cron Expression Parser
- 🔓 JWT Decoder
- 📑 YAML ⇄ JSON Converter
- 🔣 HTML Entity Converter
- 🗃️ SQL Formatter
- 📡 HTTP Status Codes
- 🧪 Fake Data Generator
- 🌐 IP Subnet Calculator
- 🧬 JSON Data Generator
- 🔗 Slug Generator
- 🧮 Checksum Calculator
- 📻 Morse Code Converter
- 🌓 Color Contrast Checker
- 📊 Word Frequency Counter
- 📄 HTML Formatter
- 🔧 .env File Parser
- 🗜️ HTML Minifier
- 🖧 MAC Address Generator
- 🔲 HTML Table Generator
- 📋 Markdown Table Generator
- 🚫 .gitignore Generator
- 🤖 robots.txt Generator
- 🌈 CSS Gradient Generator
- 🏷️ Meta Tag Generator
- 🔑 Passphrase Generator
- 🌓 CSS Box Shadow Generator
- 🖼️ SVG to Base64 Converter
- 🔗 URL Parser
- 🧩 Query String Builder
- 🕵️ User-Agent Parser
- 🔍 JSON Diff
- 🔐 Caesar Cipher
- 💾 Binary ⇔ Text Converter
- 🌐 curl Command Builder
- 🔏 Vigenère Cipher
- 😀 Emoji Picker
- 📦 Flexbox Generator
- ✂️ CSS Clip-Path Generator
- 🔷 JSON to TypeScript
- 🔤 Base58 Converter
- 🏷️ Semantic Version Checker
- 🔠 Text to ASCII Art
- ♿ Accessible Palette Generator
- 🔎 Unicode Character Lookup
- ⏱️ Cron Expression Generator
- 📖 Regex Cheatsheet
- 🔡 Base32 Converter
- 🌐 IPv6 Subnet Calculator
- 📝 README Generator
- 🗺️ Sitemap Generator
- 🔲 CSS Grid Generator
- ✅ JSON Schema Validator
- ⚙️ .htaccess Generator
- 📰 XML Formatter
- 📋 HTTP Header Parser
- 📦 JavaScript Minifier
- 🔤 Levenshtein Distance Calculator
- 📏 Run-Length Encoding (RLE)
- 🔢 Hamming Distance Calculator
- 📚 ISBN Validator & Converter
- 🆔 ULID Generator
- ⏰ Cron Next Run Calculator
- 🔓 Caesar Cipher Cracker
- 🔢 IPv4 Address ↔ Integer Converter
- 🔤 Base85 (Ascii85) Converter
- 🔏 JWT Generator
- 🔊 Morse Code Audio Player
- 🔐 chmod Permission Calculator
- 🔲 Gray Code Converter
- 🔧 Logic Gate Truth Table Generator
- 🧮 CRC-8/CRC-16 Calculator
- 🔢 Base36 Converter