Free Developer Tools
Privacy-focused online tools for developers. All processing happens in your browser - your data never leaves your device.
Text Encoder/Decoder
Encode and decode text in Base64, HEX, URL, and HTML formats with hash generation
JSON Formatter
Format, validate, repair, and beautify JSON data with syntax checking
Password Generator
Generate cryptographically secure and strong passwords with custom options
Hash Generator
Generate cryptographic hashes including MD5, SHA1, SHA256, SHA512 checksums
Base64 Image Converter
Convert images to Base64 data URLs and decode Base64 back to images
Regex Tester
Test and validate regular expressions with pattern matching and replace functionality
Color Picker
Visual color picker with HEX, RGB, HSL format conversion and CSS color support
UUID Generator
Generate cryptographically secure UUID v4 and GUID unique identifiers in batches
QR & Barcode Generator
Generate QR codes and barcodes including Code 128, Code 39, EAN-13, EAN-8 formats
JWT Decoder
Decode, debug, parse, and validate JSON Web Tokens (JWT) safely
URL Parser
Parse and analyze URLs with component breakdown, query parameters, and validation
Timestamp Converter
Convert between Unix timestamps and dates with timezone and epoch converter
SQL Formatter
Format, beautify, and validate SQL queries with MySQL and PostgreSQL support
XML Formatter
Format, validate, beautify, and minify XML documents with namespace support
Text Diff Checker
Compare and diff texts side-by-side using Myers algorithm with highlighting
Text Cleaner
Remove non-printable characters, control codes, and invisible unicode from text
CSS Formatter
Format, beautify, minify, and validate CSS stylesheets with syntax highlighting
HTML Formatter
Format, beautify, and validate HTML markup with syntax highlighting and structure analysis
Markdown Converter
Convert Markdown to HTML and vice versa with GitHub Flavored Markdown and live preview
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text with custom lengths and classical Latin structure
CRON Expression Generator
Generate and validate CRON expressions with visual builder for Unix automation and scheduling
API Key Generator
Generate secure and random API keys with custom formats and authentication security
Unit Converter
Convert between measurement units including metric, imperial, length, weight, temperature, volume, and area
Number Base Converter
Convert numbers between bases including binary, decimal, hexadecimal, octal with bit representation
CSV/JSON Converter
Convert between CSV and JSON data formats with parser, formatter, and custom delimiter support