Developer tools
The small things you reach for a dozen times a day: base64, JWTs, URL encoding, regex, cron, timestamps, colour maths.
28 tools · free · nothing uploaded
Base64 EncodeTurn text into Base64, with optional URL-safe outputBase64 DecodeDecode Base64 back to readable textURL EncodePercent-encode text for safe use in a URLURL DecodeTurn percent-encoded text back into plain charactersHTML Entity EncodeEscape &, <, > and quotes so markup renders as textHTML Entity DecodeConvert & and é back to real charactersJWT DecoderRead the header and claims inside a JSON Web TokenRegex TesterTest a pattern against sample text and see every matchUUID GeneratorGenerate v4 or v7 UUIDs from your browser's crypto sourceCron Expression ParserRead a cron line in plain English and see the next runsUnix Timestamp ConverterMove between epoch seconds, milliseconds and readable datesColor ConverterOne colour, every notation — HEX, RGB, HSL, OKLCH, CMYKCSS Gradient GeneratorBuild a linear or radial gradient and copy the CSSBox Shadow GeneratorDial in a CSS shadow and copy the ruleQuery String ParserBreak a URL's query into readable key–value pairsSlug GeneratorTurn a title into a clean, URL-safe slugLorem Ipsum GeneratorPlaceholder copy in paragraphs, sentences or wordsJSON to TypeScriptGenerate interfaces from a sample JSON payloadJSON Schema GeneratorTurn a sample payload into a JSON Schema you can validate againstSQL to TypeScriptTurn CREATE TABLE statements into typed row interfacesGraphQL FormatterReindent or minify a query, mutation or schemaCIDR & Subnet CalculatorNetwork, broadcast, usable hosts and subnet splits from any blockDNS Record ParserTurn raw dig, host or nslookup output into a readable tableUser Agent ParserRead the browser, engine, OS and device out of a UA stringUnicode Character InspectorFind the invisible and look-alike characters hiding in a stringSVG OptimizerShrink an SVG by rounding coordinates and dropping editor junkgitignore GeneratorBuild a .gitignore from the stacks you actually useMock Data GeneratorSeeded fake rows as JSON, CSV or SQL, with Indian names by default