Developer tools
A focused developer toolbox. Pretty-print and validate JSON, convert JSON to CSV, YAML or XML, decode JWTs without verifying them, encode and decode Base64 and percent-encoding, test regular expressions against sample text, generate UUIDs and hashes, and convert between timestamps, colour spaces and number bases. Text never leaves the page.
20 tools · JSON, YAML, XML, CSV, TXT, MD, SVG, HTTP · processed locallyJSON FormatterPretty-print JSON with the indentation you actually want.format jsonPopularJSON ValidatorCheck a JSON document and be told exactly where it breaks.validate jsonPopularJSON MinifierStrip every byte of formatting from a JSON document.minify jsonJSON to CSVTurn a JSON array of records into a spreadsheet-ready table.json to csvCSV to JSONParse CSV properly, quotes and embedded newlines included.csv to jsonJSON to YAMLConvert JSON into the indentation-based format people prefer to read.json to yamlYAML to JSONConvert a YAML document to JSON, and see where the types shift.yaml to jsonXML FormatterRe-indent XML without touching the text inside it.format xmlBase64 EncoderEncode text as Base64 without corrupting anything outside Latin-1.base64 encodeBase64 DecoderDecode Base64 to text, with a clear reason when it will not decode.base64 decodeURL EncoderPercent-encode a value or a whole URL, and know which one you needed.url encodeURL DecoderRead a percent-encoded URL, including values encoded more than once.url decodeJWT DecoderRead a JSON Web Token — and see, clearly, that it proves nothing.jwt decoderUUID GeneratorGenerate random v4 UUIDs from the browser’s cryptographic source.uuid generatorRegular Expression TesterTest a pattern against sample text and see every match, group and index.regex testerTimestamp ConverterMove between Unix seconds, milliseconds and ISO 8601 without guessing.timestamp converterHash GeneratorHash text with SHA-256, SHA-384, SHA-512 or SHA-1.hash generatorColour ConverterConvert HEX, RGB, HSL and HSV in both directions.colour converterText Case ConverterEleven case styles, including camelCase, snake_case and CONSTANT_CASE.case converterMarkdown PreviewSee your Markdown rendered — safely, with nothing able to execute.markdown preview
Common developer jobs
Most people arrive here with one of a handful of jobs in mind. These three cover the majority of it, and each one is a working tool rather than a description of one.
Where to go next
These are the tools people usually reach for alongside the developer work.