Developer Tools
Developer tools cover everyday coding tasks: formatting and validating JSON, XML and HTML, minifying CSS and JavaScript, encoding Base64 and URLs, generating UUIDs and hashes, and converting data between formats.
All Developer Tools
JSON Formatter Format, validate and beautify JSON with configurable indentation. Use Tool → JSON Validator Check whether your JSON is valid and inspect its structure. Use Tool → JSON Minifier Remove all whitespace and compress JSON to save space and bandwidth. Use Tool → JSON to CSV Convert a JSON array of objects into a CSV table. Use Tool → XML Formatter Format and indent XML for easier reading and editing. Use Tool → XML Validator Check whether your XML is well-formed. Use Tool → CSS Minifier Minify CSS by removing comments, whitespace and unnecessary characters. Use Tool → JavaScript Minifier Minify JavaScript by removing comments and unnecessary whitespace. Use Tool → SQL Formatter Format SQL queries with clean line breaks and indentation. Use Tool → HTML Formatter Format and indent HTML for easier reading and editing. Use Tool → Base64 Encoder Encode text to Base64 for data transmission. Use Tool → Base64 Decoder Decode Base64 strings back to readable text. Use Tool → URL Encoder Encode text for safe inclusion in URLs and query strings. Use Tool → URL Decoder Decode percent-encoded URLs and query strings. Use Tool → HTML Entities Encode Escape HTML characters to prevent rendering and injection. Use Tool → HTML Entities Decode Decode HTML entities back into readable characters. Use Tool → UUID Generator Generate one or many UUIDs (v4) instantly. Use Tool → Hash Generator Generate SHA-1, SHA-256 and SHA-512 hashes of your text. Use Tool → Color Converter Convert hex colors to RGB, HSL, HSV and CMYK. Use Tool →
Related Articles
JSON Formatter – Complete Guide & Free Online Tool A JSON formatter takes minified or messy JSON and reformats it with clean indentation so it is easy to read. It also validates your input and shows meaningful errors when the JSON is invalid. Free online tool included. Read guide → JSON Validator – Complete Guide & Free Online Tool A JSON validator confirms whether your input is valid JSON and, if so, reports its root type (object, array, etc.) and top-level keys. Invalid input produces a clear error. Free online tool included. Read guide → JSON Minifier – Complete Guide & Free Online Tool A JSON minifier strips all unnecessary whitespace from your JSON, producing a compact form that is smaller and faster to transfer while remaining valid. Free online tool included. Read guide → JSON to CSV – Complete Guide & Free Online Tool A JSON to CSV converter turns an array of objects into a comma-separated table, using the union of all keys as columns. Free online tool included. Read guide → XML Formatter – Complete Guide & Free Online Tool An XML formatter adds consistent indentation to your XML, making nested elements easier to read and edit. Free online tool included. Read guide → XML Validator – Complete Guide & Free Online Tool An XML validator checks that your XML is well-formed, ensuring every opening tag has a matching closing tag and elements are correctly nested. Free online tool included. Read guide → CSS Minifier – Complete Guide & Free Online Tool A CSS minifier removes comments, extra whitespace and redundant characters from your stylesheets, shrinking file size for faster page loads. Free online tool included. Read guide → JavaScript Minifier – Complete Guide & Free Online Tool A JavaScript minifier removes comments and unnecessary whitespace to reduce file size, helping pages and apps load faster. Free online tool included. Read guide → SQL Formatter – Complete Guide & Free Online Tool An SQL formatter reformats your queries by placing keywords like SELECT, FROM and WHERE on their own lines with consistent indentation. Free online tool included. Read guide → HTML Formatter – Complete Guide & Free Online Tool An HTML formatter re-indents your HTML so tags and their nesting are visually clear, making markup easier to read and edit. Free online tool included. Read guide → Base64 Encoder – Complete Guide & Free Online Tool A Base64 encoder converts text into a Base64 string — a safe, ASCII representation used to transmit binary data over text-based systems. Free online tool included. Read guide → Base64 Decoder – Complete Guide & Free Online Tool A Base64 decoder converts a Base64 string back into its original text, reversing the encoding process. Free online tool included. Read guide → URL Encoder – Complete Guide & Free Online Tool A URL encoder converts special characters into percent-encoded sequences so text can be safely placed in URLs and query parameters. Free online tool included. Read guide → URL Decoder – Complete Guide & Free Online Tool A URL decoder converts percent-encoded sequences back into readable characters, reversing URL encoding. Free online tool included. Read guide → HTML Entities Encode – Complete Guide & Free Online Tool An HTML entities encoder converts characters like <, >, & and " into their entity codes, so they render as plain text instead of markup. Free online tool included. Read guide → HTML Entities Decode – Complete Guide & Free Online Tool An HTML entities decoder converts entity codes like & and < back into their normal characters. Free online tool included. Read guide → UUID Generator – Complete Guide & Free Online Tool A UUID generator creates Universally Unique Identifiers — 128-bit values used to uniquely identify records, files and resources. It can produce many at once. Free online tool included. Read guide → Hash Generator – Complete Guide & Free Online Tool A hash generator computes a fixed-size hash of your text using algorithms like SHA-256, useful for checksums and integrity verification. Free online tool included. Read guide → Color Converter – Complete Guide & Free Online Tool A color converter takes a hex color and converts it to RGB, HSL, HSV and CMYK, showing a color swatch and all common formats. Free online tool included. Read guide → What Is JSON and How to Read It JSON is the data format behind most APIs. Learn its structure, common errors and how to format it. Read guide → What Is Base64 Encoding? Base64 converts binary data into ASCII text for safe transmission. Learn how it works. Read guide →
Frequently Asked Questions
Are these developer tools free?
Yes, all developer tools are free to use with no registration required.
Is my code processed securely?
All processing happens locally in your browser. Your code never leaves your device.
Do I need to install anything?
No. Everything runs directly in your web browser.