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Browse all 74 free online developer tools organized by category.
Blog Articles
- Random String Generator: Security & Entropy
- List Randomizer & Fisher-Yates Shuffle
- Emoji Picker, Accessibility & Unicode on the Web
- Text Sorter: Alphabetize Lines for Developers
- Duplicate Remover: Text Cleaning Workflows
- Countdown Timer & Pomodoro Productivity
- Dice Roller & Probability Basics for Developers
- Team Generator: Fairness & Randomization
- GPS Coordinates & GeoJSON for Developers
- MAC Addresses & OUI: Networking Basics
- Credit Card Test Numbers & Luhn Check
- Loan Amortization Explained: Schedules & Interest
- Salary Calculator: Net vs Gross Explained
- Base64URL vs Base64: JWT & URL-Safe Encoding
- UUID v7: Sortable Identifiers for Developers
- Cryptographically Secure Random: CSPRNG for Developers
- CSS Minify & Performance: Lean Stylesheets
- IPv4 Subnets & CIDR: Notation for Developers
- ROT13 & Caesar Ciphers: Developer Playbook
- Morse Code for Developers: Encoding & Testing Patterns
- JavaScript Formatter: Best Practices for Readable Code
- Lorem Ipsum & Placeholder UX: Layout Without Fake Meaning
- API Key Management: Best Practices for Teams
- Hex & Binary for Developers: Nibbles, Bytes & Converters
- UTF-8 & Unicode for Web Developers: charset, utf8mb4 & Mojibake
- URL Encoding vs HTML Entities: What Developers Get Wrong
- Bcrypt Explained: Adaptive Hashing for Passwords
- HMAC Signatures for Webhooks and APIs
- QR Codes for Developers: Use Cases and Quality Tips
- Synthetic Test Data: Privacy and Realism
- SQL Formatting for Readability and Code Review
- Markdown to HTML for Documentation Pipelines
- XML and JSON Together: Integration Patterns
- HEX, RGB, and HSL: Web Color Formats for Developers
- Image Base64 and Data URIs: Performance Trade-offs
- Unit Conversion in Apps: Precision and Rounding
- Naming Case Conventions: camelCase, snake_case, kebab-case
- Cron Schedules in Production: Patterns and Pitfalls
- Checksums and File Integrity: Downloads Done Right
- Passphrases vs Passwords: What Users Actually Remember
- Text Diff for Code Review and Config Audits
- URL Slugs for SEO-Friendly Permalinks
- Word Counts for SEO, Essays, and Social Limits
- EMI and Loan Repayment: What Changes Your Cost
- BMI Categories and Healthy Ranges Explained
- Practical Percentage Math: Discounts, Tax, and Growth
- JSON vs YAML: Complete Conversion Guide
- SIP Calculator Guide: Plan Your Investments
- Unix Timestamp Guide: Complete Developer Tutorial
- JSON to CSV Conversion: Complete Developer Guide
- Base64 Encoding: The Complete Developer Guide
- JSON Formatting Best Practices for Clean APIs
- Creating Unbreakable Passwords: A Security Guide
- JWT Tokens Explained: Authentication Made Simple
- UUID Generation: Choosing the Right Version
- Cryptographic Hash Functions: MD5, SHA-256, and Beyond
- Regex Mastery: Pattern Matching Made Simple
- Essential Developer Tools List: 75+ Free Online Utilities
- API Debugging Guide: Tools & Techniques for Developers
- JSON Schema Guide: Validation & Structure Definition
- Mutual Fund Returns Calculator Guide: SIP vs Lump Sum
- CSV Data Cleaning Guide: Best Practices & Tools
Tools by Category
Generators
Generate random data, passwords, UUIDs, and more
Mock Data
Generate realistic test data for development
Text & String
Text manipulation and string generation tools
Encoders & Decoders
Encode and decode data in various formats
Converters
Convert between different data formats
Hash & Crypto
Generate hashes and cryptographic functions
Formatters
Format and beautify code and data
Utilities
Helpful everyday tools and calculators
Calculators
Financial, health, and everyday calculators