Free Developer Tools Collection
A comprehensive collection of 40+ essential developer tools for formatting, encoding, generating, converting, and analyzing data. All tools work offline with no data transmission to external servers.
✓ Completely Free ✓ No Registration Required ✓ Works Offline ✓ Privacy Focused
Converters
JSON ↔ String Converter
Bidirectional conversion with proper escaping and real-time validation
CSV → JSON Converter
Convert CSV to JSON with automatic delimiter detection
YAML ↔ JSON Converter
Bidirectional YAML and JSON conversion with proper formatting
XML ↔ JSON Converter
Convert between XML and JSON with attribute handling
Timestamp Converter
Convert between Unix timestamps, ISO dates, and human-readable formats
cURL to Code Converter
Convert cURL commands to code in multiple programming languages
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and custom bases
Markdown to HTML
Convert Markdown content to clean HTML with live preview and syntax highlighting
Date Format Converter
Convert between different date and time formats including Unix timestamps and ISO 8601
Encoders
Formatters
JSON Formatter
Format JSON with customizable indentation and key sorting
XML Formatter
Format XML with proper element nesting and indentation
Code Minifier
Minify JSON, CSS, HTML, and JavaScript code
Regex Tester
Test regular expressions with real-time matching and explanation
Text Diff Checker
Compare two texts and highlight differences with side-by-side view
Markdown Preview
Preview Markdown with syntax highlighting and live rendering
SQL Formatter
Format and prettify SQL queries with syntax highlighting
HTML Preview Tool
Preview HTML code in real-time with responsive design testing
Environment Variable Manager
Manage environment variables across multiple formats with security validation
Generators
Hash Generator
Generate MD5, SHA1, SHA256, and SHA512 hashes
Password Generator
Generate secure passwords with customizable options and strength analysis
QR Code Generator
Generate QR codes for text, URLs, WiFi, email, and more
JWT Token Decoder
Decode and validate JWT tokens with header, payload, and signature analysis
UUID Generator
Generate UUID v1, v4, and custom UUIDs for database IDs
Color Palette Generator
Generate color palettes, convert between formats, and extract colors
Lorem Ipsum Generator
Generate placeholder text in words, sentences, or paragraphs
Image Optimizer
Compress and resize images with quality control
API Tester
Test REST APIs with request builder and response viewer
Cron Expression Builder
Build and validate cron expressions with human-readable descriptions
Certificate Decoder (X.509)
Decode and analyze X.509 SSL/TLS certificates with detailed information
RBAC Designer
Design, test, and generate Role-Based Access Control policies for any application
Background Remover
Automatically remove backgrounds from images using intelligent algorithms
URL Shortener
Create short, memorable links with custom aliases and detailed analytics
Domain Name Checker
Check domain availability across popular TLDs and discover alternative suggestions
Email Template Generator
Create professional, responsive email templates for marketing and transactional campaigns
Why Choose Our Developer Tools?
Privacy First
All processing happens locally in your browser. No data is sent to external servers.
Lightning Fast
Instant results with no loading times. All tools are optimized for maximum performance.
Mobile Friendly
Responsive design that works perfectly on desktop, tablet, and mobile devices.
Always Free
No hidden costs, no premium plans. All tools are completely free to use forever.
Complete Developer Toolkit
Data Conversion Tools
Transform data between different formats effortlessly. Convert JSON to strings, encode Base64, decode JWT tokens, and switch between number bases. Perfect for API development and data manipulation tasks.
- • JSON Formatter & String Converter
- • Base64 Encoder & Decoder
- • URL Encoder & Decoder
- • Number Base Converter
Code & Text Processing
Enhance your coding workflow with powerful text processing tools. Format SQL, minify code, test regular expressions, and compare text differences. Essential tools for code optimization and debugging.
- • Code Minifier & Formatter
- • SQL & XML Formatter
- • Regex Tester & Builder
- • Text Diff Checker
Security & Encryption
Generate secure passwords, create hash values, and manage authentication tokens. Essential security tools for developers working with user authentication and data protection.
- • Password Generator
- • Hash Generator (MD5, SHA)
- • JWT Token Decoder
- • UUID Generator
ETL & Data Processing
Professional-grade tools for Extract, Transform, Load workflows and data analysis. Validate data quality, profile datasets, convert date formats, and ensure data integrity for business intelligence and analytics projects.
- • Data Validator & Quality Checker
- • Data Profiler & Statistics
- • Date Format Converter
- • Schema Validation Tools
Web Development Utilities
Streamline web development with specialized tools for modern workflows. Test APIs, generate QR codes, optimize images, and create email templates. Everything you need for full-stack development.
- • API Tester & Debugger
- • QR Code Generator
- • Image Optimizer & Resizer
- • Email Template Generator