Online Developer Tools
Free, fast, and easy-to-use web tools for developers. Streamline your workflow with our comprehensive suite of utilities.
Popular Tools
Base64 Encode/Decode
Convert text to Base64 format and decode Base64 strings
Notepad
Create, edit, save and manage notes directly in your browser.
Text Case Converter
Convert text between different casing conventions
Word/Character Counter
Count words, characters, sentences, and paragraphs in your text
✨ New Tools
11 new toolsRegex Tester
Build, test, and debug regular expressions with instant match highlighting and flag support
CSV ⇄ JSON Converter
Convert between CSV and JSON formats with smart parsing, custom delimiters, and file upload/download support
Duplicate Lines Remover
Remove duplicate lines from text while preserving order
JWT Decoder / Encoder
Decode, encode, and verify JSON Web Tokens (JWT) with HS256 signature support.
Markdown ⇄ HTML Converter
Convert Markdown to HTML and HTML back to Markdown. Support for headers, links, images, code blocks, lists, tables, and more
UUID Generator
Generate RFC 4122 compliant UUIDs (v1 and v4) with multiple output formats for databases, APIs, and applications
JSON Formatter & Validator
Format, validate, and minify JSON data with syntax highlighting and error detection
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates with timezone support and current timestamp generation
Password Generator
Generate secure, random passwords with customizable length, character types, and strength indicators
QR Code Generator
Generate custom QR codes for URLs, text, contact info, and more with customizable colors and sizes
Hash Generator
Generate MD5, SHA1, SHA256, and SHA512 hashes from text input
Encoders
(5 tools)Base64 Encode/Decode
Convert text to Base64 format and decode Base64 strings
HTML ⇄ Entities Converter
Encode and decode HTML entities
URL Encoder/Decoder
Encode and decode URL components
Base64 ⇄ Image
Convert between Base64 and Image formats
Hash Generator
Generate MD5, SHA1, SHA256, and SHA512 hashes from text input
Converters
(7 tools)JSON Formatter & Validator
Format, validate, and minify JSON data with syntax highlighting and error detection
Text ⇄ Binary ⇄ Hex ⇄ Octal
Convert between text and different number systems
Color Converter
Convert between HEX, RGB, HSL color formats
QR Code Generator
Generate custom QR codes for URLs, text, contact info, and more with customizable colors and sizes
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates with timezone support and current timestamp generation
Markdown ⇄ HTML Converter
Convert Markdown to HTML and HTML back to Markdown. Support for headers, links, images, code blocks, lists, tables, and more
CSV ⇄ JSON Converter
Convert between CSV and JSON formats with smart parsing, custom delimiters, and file upload/download support
Text Tools
(3 tools)Text Case Converter
Convert text between different casing conventions
Word/Character Counter
Count words, characters, sentences, and paragraphs in your text
Duplicate Lines Remover
Remove duplicate lines from text while preserving order
Security Tools
(2 tools)Utilities
(5 tools)UUID Generator
Generate RFC 4122 compliant UUIDs (v1 and v4) with multiple output formats for databases, APIs, and applications
Calendar
Manage and view events by day, week, or month in a smart calendar interface
Random Number Generator
Generate random numbers between a defined min and max value with one click.
Notepad
Create, edit, save and manage notes directly in your browser.
Regex Tester
Build, test, and debug regular expressions with instant match highlighting and flag support