A collection of powerful, privacy-focused online tools for developers. Generate secure passwords, format JSON, encode URLs, and more. All tools run locally in your browser - fast, secure, and completely free.
Choose from our growing collection of free online developer utilities
Generate strong, random passwords with customizable length and character sets. Uses cryptographically secure methods for maximum security.
Generate RFC4122 compliant UUIDs (v1 and v4). Perfect for database keys, API tokens, and unique identifiers.
Encode text to Base64 or decode Base64 strings. Supports URL-safe encoding for safe data transmission.
Encode URLs and query parameters or decode URL-encoded strings. Essential for web APIs and query strings.
Decode and inspect JSON Web Tokens. View header, payload, signature, and expiration details instantly.
Convert text into clean, SEO-friendly URL slugs. Perfect for creating readable URLs and identifiers.
Format, validate, and beautify JSON data. Minify or prettify with customizable indentation.
Pick colors and convert between HEX, RGB, HSL, HSV formats. Generate color palettes instantly.
Create beautiful CSS box-shadows with live preview. Adjust offset, blur, spread and color instantly.
Generate placeholder text for designs and mockups. Create paragraphs, sentences, or words instantly.
Compare two texts and see differences instantly. Perfect for code review and document comparison.
Test and debug regular expressions with real-time highlighting and detailed match information.
Generate MD5, SHA-1, SHA-256 hashes
Live markdown preview and conversion
All tools run locally in your browser. Your data never leaves your device.
Instant results with no server round-trips. Works offline once loaded.
No subscriptions, no limits, no ads. Just pure functionality.
DevToolsPro.org is a comprehensive collection of free online developer utilities designed to streamline your web development workflow. Whether you're building applications, managing APIs, or handling sensitive data, our tools provide instant, privacy-focused solutions.
Every tool on DevTools runs entirely in your browser using modern JavaScript APIs. This means your data never leaves your device, ensuring complete privacy and security.
No registration required, no data collection, and no server-side processing.
From generating secure passwords to formatting JSON data, our growing suite of developer tools helps you work more efficiently. All tools are optimized for speed, fully responsive for mobile use, and completely free - no subscriptions or hidden costs.