Developer Tools - Format, Encode, Validate, and Convert
Free online utilities: format JSON, encode Base64, validate data, convert formats, and more. Everything runs in your browser.
Featured Tools
MD5 Generator
Convert any text to its MD5 hash. Useful for integrity verification and file comparison.
SHA-256 Cipher + Salt (PBKDF2)
Generate a derived hash with PBKDF2 + SHA-256. Add salt, control iterations and hash size for enhanced cryptographic security.
JSON Formatter
Format and beautify JSON to improve readability. Automatically detects syntax errors.
Cron Explainer
Describe cron expressions in natural language and shows upcoming executions.
Other Useful Tools
Base64 Encoder
Encode text to Base64 format. Useful for transmitting binary data through text-only media.
Base64 Decoder
Decode Base64 formatted text to its original value.
URL Encoder
Encode text for safe use in URLs. Converts special characters to %XX format.
URL Decoder
Decode URL-encoded text. Converts %XX format to original characters.
JSON Validator
Validate your JSON syntax and show detailed errors if any.
Minify JSON
Compress JSON by removing unnecessary whitespace and line breaks. Reduces file size.
JSON to CSV
Convert a JSON array to CSV format. Ideal for importing data into Excel or Google Sheets.
XML Formatter
Format and beautify XML code to improve readability with proper indentation.
XML to JSON
Convert XML to JSON format. Useful for working with modern APIs that use JSON.
UUID Generator
Generate universally unique identifiers (UUID v4) for your projects.
Password Generator
Create secure and random passwords customizable to your needs.
Timestamp Converter
Convert between Unix timestamps and readable dates. Useful for debugging and log analysis.
Case Converter
Convert text between different capitalization formats.
Remove Duplicate Lines
Remove duplicate lines from text, leaving only unique instances. Useful for cleaning lists.
Text Sorter
Sort text lines alphabetically in ascending or descending order.
JWT Decoder
Decode JWT (JSON Web Tokens) to inspect their header and payload. Does not validate signature.
Regex Tester
Test and validate regular expressions in real-time. Visualize all matches found.
Markdown Viewer
View and render Markdown files with standard syntax support. Ideal for documentation and READMEs.
HTML Entities
Encode and decode HTML entities. Convert special characters to <, &, é and back.
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal. Accepts 0x, 0b and 0o prefixes.
Chmod Calculator
Calculate Unix permissions in octal and symbolic notation with an interactive r/w/x permission matrix.
CSV to JSON
Convert CSV data to JSON format with automatic delimiter detection and header support.
YAML ⇄ JSON
Convert between YAML and JSON in both directions with automatic input format detection.
Color Converter
Convert colors between HEX, RGB, HSL and OKLCH with preview and WCAG contrast analysis.
Text Diff Checker
Compare two texts line by line and highlight added and removed differences.
Why DevToolsHub?
DevToolsHub is your 100% free developer tools platform. All utilities run directly in your browser, ensuring your data never leaves your device. No logging, no tracking, just fast and efficient tools.
From JSON formatters to hash generators, Base64 encoders to data validators. Our tools are designed for developers who need quick results without complications. Everything works offline when you need it.