Free developer and web utility tools for formatting, encoding, validating, and debugging everyday code — format JSON and XML, encode Base64 and URLs, test regex patterns, decode JWTs, minify CSS and JavaScript, format SQL, convert timestamps, and validate UUIDs. Everything runs in your browser with no sign-up required.
Built for API debugging, frontend development, and quick data transformations without leaving the browser. Paste a payload, see instant results, and copy output to your clipboard — whether you are cleaning a config file, checking token claims, or preparing encoded strings for HTTP requests.
JSON FormatterBeautify JSON with 2-space, 4-space, or tab indentation.
JSON ValidatorCheck JSON syntax and surface parse error messages.
Base64 EncoderEncode text to Base64 with UTF-8 support.
Base64 DecoderDecode Base64 strings back to readable text.
URL EncoderPercent-encode URLs and query string components.
URL DecoderDecode percent-encoded URLs and text values.
HTML Entity EncoderConvert characters to safe HTML entities.
HTML Entity DecoderDecode HTML entities to plain characters.
Regex TesterTest regex patterns with live match results.
JWT DecoderDecode JWT header and payload without verification.
XML FormatterIndent and beautify XML documents.
XML ValidatorValidate XML syntax and catch parse errors.
CSS MinifierRemove comments and whitespace from CSS.
CSS BeautifierFormat minified CSS with readable indentation.
JavaScript MinifierStrip comments and compress JavaScript whitespace.
JavaScript BeautifierAdd line breaks and indentation to minified JS.
SQL FormatterFormat SQL with keyword line breaks.
Timestamp ConverterConvert Unix, milliseconds, and ISO dates.
Unix Time ConverterConvert Unix epoch seconds and milliseconds.
UUID ValidatorValidate UUID format and detect version.
JSON ValidatorCheck JSON syntax and surface parse error messages.
Base64 EncoderEncode text to Base64 with UTF-8 support.
Base64 DecoderDecode Base64 strings back to readable text.
URL EncoderPercent-encode URLs and query string components.
URL DecoderDecode percent-encoded URLs and text values.
HTML Entity EncoderConvert characters to safe HTML entities.
HTML Entity DecoderDecode HTML entities to plain characters.
Regex TesterTest regex patterns with live match results.
JWT DecoderDecode JWT header and payload without verification.
XML FormatterIndent and beautify XML documents.
XML ValidatorValidate XML syntax and catch parse errors.
CSS MinifierRemove comments and whitespace from CSS.
CSS BeautifierFormat minified CSS with readable indentation.
JavaScript MinifierStrip comments and compress JavaScript whitespace.
JavaScript BeautifierAdd line breaks and indentation to minified JS.
SQL FormatterFormat SQL with keyword line breaks.
Timestamp ConverterConvert Unix, milliseconds, and ISO dates.
Unix Time ConverterConvert Unix epoch seconds and milliseconds.
UUID ValidatorValidate UUID format and detect version.