Developer Tools
Formatters, encoders, hash generators and debugging utilities for developers.
43 free tools, most used first
- Base64 Decoder Decode Base64 strings back to readable text.
- Base64 Encoder Featured Encode any text to Base64 (Unicode-safe).
- Caesar Cipher Encrypt or decrypt text with a Caesar shift cipher.
- Bcrypt Hash Generator Generate a secure bcrypt hash for passwords.
- CSS Minifier Minify CSS to reduce stylesheet size.
- Color Converter Convert colors between HEX, RGB and HSL.
- Credit Card Validator Check card numbers with the Luhn algorithm and detect the card type.
- JavaScript Minifier Light-minify JavaScript by stripping comments and whitespace.
- CSV to JSON Converter Convert CSV data with headers into a JSON array.
- JSON Minifier Strip whitespace from JSON to shrink payload size.
- JSON Formatter Featured Format and beautify minified JSON with proper indentation.
- JSON Validator Validate JSON and pinpoint syntax errors instantly.
- CRC32 Checksum Generator Calculate the CRC32 checksum of any text.
- Hex to Text Converter Convert hexadecimal byte values back to text.
- JSON to CSV Converter Convert a JSON array of objects into CSV format.
- JWT Decoder Decode a JWT and inspect its header and payload (no verification).
- Regex Tester Test regular expressions against sample text and see matches.
- MD5 Hash Generator Featured Generate the MD5 hash of any text.
- Text to Hex Converter Convert text into hexadecimal byte values.
- SQL Formatter Format SQL queries with keywords on new lines.
- UUID Generator Featured Generate random version-4 UUIDs.
- HTML Minifier Minify HTML by removing comments and extra whitespace.
- SHA256 Hash Generator Featured Generate the SHA-256 hash of any text.
- PHP Serializer Convert JSON into PHP serialized format.
- HTML Decoder Convert HTML entities back to readable characters.
- Unix Timestamp Converter Convert Unix timestamps to dates and back.
- HTML Encoder Escape HTML special characters into safe entities.
- HTML Entities Converter Convert all applicable characters to HTML entities (server-grade).
- IP Address Lookup Validate and analyze IPv4 addresses.
- SHA1 Hash Generator Generate the SHA-1 hash of any text.
- Whirlpool Hash Generator Generate the Whirlpool hash of any text.
- XML Formatter Pretty-print and indent XML so it's easy to read and debug.
- Cron Expression Explainer Translate a cron expression into plain English so you know when it runs.
- CSS Beautifier Format and indent minified or messy CSS into clean, readable style rules.
- ROT13 Encoder Apply the classic ROT13 letter substitution cipher.
- SHA512 Hash Generator Generate the SHA-512 hash of any text.
- HTML Formatter Indent and format messy or minified HTML into a clean, readable structure.
- JSON String Unescaper Decode an escaped JSON string back into readable text with real line breaks.
- Query String Parser Break a URL or query string into readable key/value parameters.
- JSON String Escaper Escape text into a safe JSON string — quotes, newlines and special characters handled.
- Number Base Converter Convert numbers between binary, octal, decimal and hexadecimal.
- Markdown to HTML Converter Convert Markdown to clean HTML you can paste anywhere — headings, bold, italics, lists, links and code.
- PX to REM Converter Convert px to rem (and rem to px) for responsive, accessible CSS — with a handy reference table.
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