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๐Ÿ’ป Developer Tools

Essential tools for web developers and programmers. Format code, generate hashes, create QR codes, validate JSON, and streamline your development workflow with professional-grade utilities.

22 Tools
Pro Grade
Fast Processing
Free Always
Category Rating
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4.7 / 5
303 total ratings across all tools

Essential Developer Tools

Professional development utilities to boost productivity and streamline workflows.

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JSON Formatter

Format, validate, and minify JSON data beautifully with syntax highlighting and error detection.

  • Syntax highlighting
  • Error detection
  • Minify & beautify
  • Tree view
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4.8 (34 votes)
Most Used Format JSON โ†’
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JSON Validator

Validate JSON syntax and find formatting errors with detailed error reporting.

  • Syntax validation
  • Error reporting
  • Schema validation
  • Fix suggestions
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4.8 (33 votes)
Essential Validate JSON โ†’
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API Response Formatter

Format and beautify API responses including JSON, XML, and HTML with syntax highlighting for better readability and debugging.

  • Multi-format support
  • Syntax highlighting
  • Response validation
  • Pretty printing
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5.0 (1 vote)
API Tools Format API Response โ†’
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QR Code Generator

Generate QR codes for URLs, text, WiFi, and contacts with customization options.

  • Multiple data types
  • Custom colors
  • Logo embedding
  • High resolution
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4.8 (29 votes)
Popular Generate QR โ†’
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Regex Tester

Test, validate, and debug regular expressions with real-time matching, group capture, and pattern explanation for JavaScript, Python, PHP.

  • Real-time testing
  • Multiple regex flavors
  • Group capture display
  • Pattern explanation
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5.0 (1 vote)
Testing Test Regex โ†’
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Password Generator

Generate secure passwords with custom criteria and cryptographic strength.

  • Cryptographically secure
  • Custom length
  • Character sets
  • Bulk generation
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4.5 (28 votes)
Security Generate Password โ†’
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Password Strength Checker

Analyze password strength and security with detailed feedback and improvement suggestions.

  • Strength analysis
  • Security scoring
  • Improvement tips
  • Pattern detection
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5.0 (1 vote)
Security Check Strength โ†’
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JWT Encoder Decoder

Encode, decode, and verify JSON Web Tokens (JWT) with signature validation, payload inspection, and security analysis for authentication.

  • JWT encode/decode
  • Signature verification
  • Payload inspection
  • Security validation
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5.0 (1 vote)
Security Process JWT โ†’
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MD5 Generator

Generate MD5 hashes for data integrity verification and checksum validation.

  • Text & file hashing
  • Hex & Base64 output
  • Batch processing
  • Hash comparison
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4.6 (15 votes)
Crypto Generate Hash โ†’
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UUID Generator

Generate unique identifiers for applications and database records.

  • UUID v1, v4, v5
  • Bulk generation
  • Multiple formats
  • Copy to clipboard
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4.7 (20 votes)
Database Generate UUID โ†’
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SQL Formatter

Format, beautify, and optimize SQL queries with syntax highlighting, keyword capitalization, and indentation for MySQL, PostgreSQL, Oracle.

  • SQL beautification
  • Multi-database support
  • Syntax highlighting
  • Query optimization
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5.0 (1 vote)
Database Format SQL โ†’
โœจ

JavaScript Beautifier

Format and beautify JavaScript code with syntax highlighting and custom settings.

  • Code formatting
  • Syntax highlighting
  • Minification
  • Custom settings
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4.7 (28 votes)
JavaScript Format JS โ†’
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CSS Beautifier

Format and organize CSS code beautifully with property sorting and optimization.

  • CSS formatting
  • Property sorting
  • Minification
  • Vendor prefixes
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4.7 (22 votes)
CSS Format CSS โ†’
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HTML Beautifier

Format and indent HTML markup properly with tag validation and optimization.

  • HTML formatting
  • Tag validation
  • Minification
  • Custom settings
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4.7 (20 votes)
HTML Format HTML โ†’
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YAML Formatter

Format, validate, and beautify YAML files with syntax highlighting, indentation correction, and error detection for configuration files.

  • YAML validation
  • Syntax highlighting
  • Indentation fixing
  • Error detection
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5.0 (1 vote)
Configuration Format YAML โ†’
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JSON to CSV

Convert JSON data to CSV format for spreadsheets with nested data support.

  • Nested JSON support
  • Custom delimiters
  • Header mapping
  • Download CSV
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4.6 (18 votes)
Conversion Convert JSON โ†’
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CSV to JSON

Convert CSV data to JSON format for APIs with auto header detection.

  • Auto header detection
  • Custom separators
  • Type inference
  • Pretty formatting
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4.6 (16 votes)
Conversion Convert CSV โ†’
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XML Generator

Generate well-formatted XML documents with validation and custom structure options.

  • XML structure generation
  • Schema validation
  • Custom formatting
  • Syntax highlighting
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4.6 (16 votes)
Markup Generate XML โ†’
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QR Code Decoder

Decode and read QR codes from images with batch processing support.

  • Image upload
  • Multiple formats
  • Batch decoding
  • Data extraction
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4.6 (14 votes)
Scanner Decode QR โ†’
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IP Subnet Calculator

Calculate network subnets, IP ranges, and CIDR notations for network planning.

  • CIDR calculations
  • IP range analysis
  • Subnet planning
  • Binary conversion
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4.5 (2 votes)
Network Calculate Subnet โ†’
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Favicon Generator

Generate complete favicon packages with all sizes and formats for websites and web apps.

  • Complete favicon package
  • Multiple formats & sizes
  • HTML code generation
  • Apple Touch icons
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5.0 (1 vote)
Web Generate Favicon โ†’
๐Ÿ–ผ๏ธ

Lorem Pixel Generator

Generate placeholder images with custom dimensions and colors for design mockups.

  • Custom dimensions
  • Color options
  • Category themes
  • Bulk generation
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5.0 (1 vote)
Design Generate Images โ†’

Development Best Practices

Essential tips and techniques to improve your development workflow and code quality.

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JSON Best Practices

Follow JSON formatting standards for better readability and API compatibility.

{ "name": "John Doe", "age": 30, "skills": ["JavaScript", "Python", "React"], "active": true }
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Password Security

Generate strong passwords with mixed characters and adequate length for security.

โ€ข Minimum 12 characters โ€ข Mix uppercase, lowercase, numbers, symbols โ€ข Avoid dictionary words โ€ข Use unique passwords per service
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UUID Usage Guidelines

Choose the right UUID version for your specific use case and requirements.

UUID v1: Timestamp-based (contains MAC address) UUID v4: Random (most common, cryptographically secure) UUID v5: Namespace-based (deterministic)
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Code Formatting Standards

Maintain consistent code formatting for better readability and team collaboration.

โ€ข Use 2-4 spaces for indentation โ€ข Keep lines under 80-120 characters โ€ข Use meaningful variable names โ€ข Add comments for complex logic
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QR Code Optimization

Design QR codes for maximum scannability and user experience.

โ€ข Use high contrast colors โ€ข Maintain quiet zone around code โ€ข Test on various devices โ€ข Keep data concise for better scanning
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Hash Function Selection

Choose appropriate hash functions based on security requirements and use cases.

MD5: File integrity (not cryptographically secure) SHA-256: Digital signatures, certificates bcrypt: Password hashing HMAC: Message authentication

Frequently Asked Questions

What's the difference between JSON formatting and validation? +
JSON formatting beautifies and structures the code for readability, while validation checks syntax correctness and identifies errors. Both are essential for working with JSON data effectively.
Are the generated passwords truly secure? +
Yes, our password generator uses cryptographically secure random number generation (CSPRNG) to create passwords that are unpredictable and suitable for security-critical applications.
When should I use UUID v1 vs UUID v4? +
Use UUID v4 for most applications as it's random and doesn't leak information. Use UUID v1 only when you need timestamp ordering and don't mind exposing MAC address information.
Can QR codes store sensitive information safely? +
QR codes are not encrypted by default and can be read by anyone. For sensitive data, encrypt the information before encoding or use QR codes only as references to secure systems.
Is MD5 still safe for password hashing? +
No, MD5 is not secure for passwords due to collision vulnerabilities and speed. Use bcrypt, scrypt, or Argon2 for password hashing instead. MD5 is still acceptable for file integrity checks.
Do these tools work offline? +
Yes, most tools process data client-side in your browser and work offline once loaded. This ensures privacy and security as your data never leaves your device.
Can I integrate these tools into my development workflow? +
While these are web-based tools, you can bookmark them for quick access. For CI/CD integration, consider using command-line equivalents of these tools in your build processes.
What's the maximum file size for processing? +
Most tools can handle files up to 10MB. For larger files, consider breaking them into smaller chunks or using specialized tools designed for big data processing.
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200+ Forever Free Tools

Complete collection of converter tools, generators, and utilities. All completely free to use without registration, forever.

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Fast & Browser-Based

Lightning-fast processing that currently happens in your browser. Most tools work offline and your data stays on your device.

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Mobile Optimized

All tools work perfectly on mobile phones, tablets, and desktop computers with responsive design and intuitive interfaces.

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Privacy Committed

Current browser-based processing means your files never leave your device. Ad-supported for sustainability, transparent about practices.

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