Free Online Developer Tools — Formatters, Encoders & Validators
Format JSON, HTML, XML, and SQL, encode or decode Base64 and JWTs, test regex, diff code, and generate UUIDs — all directly in your browser. Built for everyday developer workflows.
JSON Formatter & Validator
Format, beautify, minify, and validate JSON with syntax highlighting and tree view.
Try now →HTML Formatter
Beautify and format HTML code with proper indentation and structure.
Try now →XML Formatter
Format and validate XML documents with syntax highlighting.
Try now →SQL Formatter
Format and beautify SQL queries for better readability across multiple dialects.
Try now →Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to plain text.
Try now →JWT Decoder
Decode and inspect JSON Web Tokens — view header, payload, and signature.
Try now →UUID Generator
Generate random UUIDs (v4) for databases, APIs, and applications.
Try now →JSON Escape / Unescape
Escape special characters in JSON strings or unescape them back to readable format.
Try now →Regex Tester
Test and debug regular expressions against sample text with live match highlighting.
Try now →Diff Checker
Compare two blocks of code or text and highlight line-by-line differences.
Try now →Lorem Ipsum Generator
Generate placeholder Lorem Ipsum text in custom word, sentence, or paragraph counts.
Try now →