DevTools Logo

DevTools

Free online developer tools for encoding, formatting, generating, and security tasks

All processing is done in your browser - your data never leaves your device

Popular Developer Tools

Quick access to our most used tools

Base64 Encoder/Decoder
Encode and decode Base64 strings online free
URL Encoder/Decoder
Encode and decode URL components safely
JSON Formatter/Validator
Format and validate JSON data
UUID Generator
Generate UUID v1 and v4 unique identifiers
Password Generator
Generate secure random passwords
JWT Decoder
Decode and analyze JWT tokens without secret key

Browse by Category

Explore our complete collection of developer tools

Encoders & Decoders
Encode and decode various data formats

Tools included:

Base64, URL, HTML Entity, Binary, Hex

Formatters & Validators
Format and validate code and data

Tools included:

JSON/Validator, XML/Validator, YAML/Validator, CSS/Minifier, HTML/Validator, SQL

Generators
Generate various types of data

Tools included:

UUID, QR Code, Password, Lorem Ipsum, Random Data

Security Tools
Security and cryptographic tools

Tools included:

JWT, Hash, SSL Certificate

Converters
Convert between different formats and units

Tools included:

Timestamp Converter, Color Converter, Unit Converter, Image Format Converter

Utilities
Helpful development utilities and tools

Tools included:

Regex Tester, Text Diff Checker, Lorem Ipsum, Word Counter, URL Analyzer, IP Address Lookup, WHOIS Lookup, DNS Lookup, Website Speed Test, SSL Certificate Checker

Data Converters
Convert between different data formats

Tools included:

CSV to JSON Converter, JSON to CSV Converter, XML to JSON Converter, JSON to XML Converter, Markdown to HTML Converter, HTML to Markdown Converter

Image Tools
Image processing and optimization tools

Tools included:

Image Resizer & Compressor, SVG Optimizer, Favicon, Image to Base64 Converter

Text Processors
Advanced text processing and manipulation

Tools included:

Case Converter, Text Sorter & Deduplicator, Escape/Unescape String, Text to ASCII Converter, Random String

Crypto Tools
Cryptographic and security utilities

Tools included:

JWT, AES Encrypt/Decrypt, RSA Key, HMAC, OTP

Web Tools
Web development and optimization tools

Tools included:

JavaScript Minifier/Beautifier, CSS Grid, robots.txt, Browser Feature Detector, Email Validator, Credit Card Validator, Phone Number, Cron Expression, User Agent Parser, ASCII Art

View All Developer Tools

Browse our complete collection of free online developer tools

Why Choose Our Developer Tools?

Free & No Registration

All our developer tools are completely free to use. No registration, no limits, no hidden costs.

Privacy & Security

All processing happens in your browser. Your data never leaves your device, ensuring complete privacy.

Fast & Reliable

Instant results with no server processing. Perfect for developers who need quick conversions and formatting.

Advertisement space - More tools coming soon!

© 2025 DevTools