JSON formatter, Base64 encoder, URL encoder, hash generators, password generator, UUID generator, and more. Free and instant.
Format, validate, and minify JSON data.
Encode text to Base64 or decode Base64 back to text.
Encode or decode URLs and query parameters.
Generate cryptographic hashes of any text.
Generate secure random passwords with customizable options.
Generate random UUIDs (Universally Unique Identifiers).
Beautify or minify HTML code.
Minify JavaScript code by removing whitespace and comments.
Decode JSON Web Tokens to view header and payload.
Test regular expressions against text and see matches highlighted.
Compare two texts and highlight the differences.
Write Markdown and see live HTML preview.
AllToolsHub provides essential developer tools for everyday coding tasks. Format and validate JSON, encode and decode Base64 and URLs, generate cryptographic hashes, create strong passwords, generate UUIDs, format HTML, minify JavaScript, decode JWTs, test regular expressions, compare text differences, and preview Markdown - all running entirely in your browser for maximum privacy and speed.
Read our comprehensive guide with tips, tutorials and best practices.
Read the Full GuideSoftware developers, web designers, and IT professionals regularly need utility tools for formatting, encoding, hashing, and generating data. AllToolsHub Developer Tools provides a comprehensive suite of free, browser-based developer utilities including JSON formatter and validator, HTML/CSS/JS minifier, Base64 encoder/decoder, URL encoder/decoder, hash generator (MD5, SHA1, SHA256), password generator, UUID generator, regex tester, image to Base64 converter, and more.
Working with JSON data is a core part of modern web development. Our JSON formatter beautifies minified JSON for readability, validates JSON syntax to catch errors, minifies formatted JSON for production use, and provides a tree view for navigating complex data structures. This is essential for debugging API responses, editing configuration files, and working with NoSQL databases.
Base64 encoding and decoding is needed for embedding data in HTML, email attachments, and API payloads. URL encoding ensures special characters are properly handled in web addresses. Our hash generator creates MD5, SHA1, SHA256, and SHA512 hashes for data integrity verification. The password generator creates cryptographically strong random passwords with customizable length and character requirements.
Reduce the size of your HTML, CSS, and JavaScript files by removing whitespace, comments, and unnecessary characters. Minification is a key optimization step for web performance, reducing file transfer times and improving page load speed. Our minifier handles each language appropriately, ensuring the output is functionally identical to the original code.
JSON formatter, Base64 encoder/decoder, URL encoder, hash generator (MD5, SHA1, SHA256), password generator, UUID generator, regex tester, HTML/CSS/JS minifier, and more.
Yes, it accurately formats, validates, and beautifies JSON data. It highlights syntax errors and provides helpful error messages.
Yes, our password generator creates cryptographically random passwords with customizable length, uppercase, lowercase, numbers, and special characters.
Absolutely. All processing happens in your browser. No code or data is sent to any server.
Yes, our regex tester lets you write patterns and test them against sample text with real-time highlighting of matches.
Yes, upload an image and get its Base64 encoded string for embedding directly in HTML, CSS, or JSON.