Tools for developers

The ones you'd otherwise reach for a VS Code extension or an npm package to do — instead, open a tab.

JSON Formatter & ValidatorFormat, validate, minify Regex TesterLive match highlighting, JS flavor Hash GeneratorSHA-1 / 256 / 384 / 512 Base64 Encode/Decode URL Encoder/Decoder HTML Entity Encoder UUID Generatorv4, bulk output Unix Timestamp Converter Binary / Hex / Decimal Converter Markdown Previewer CSS Gradient Generator Slug Generator Whitespace & Text Cleaner JWT DecoderHeader + payload + expiry check Cron Expression ExplainerPlain English + next 5 runs cURL Command BuilderNo more memorizing flags Subnet CalculatorIPv4 CIDR made readable CSV ↔ JSON ConverterBoth directions, client-side What Is My IP Address?Public IP + browser/OS info DNS LookupA, AAAA, MX, TXT, CNAME, NS records Color Contrast CheckerWCAG AA/AAA pass/fail YAML ↔ JSON ConverterBoth directions, client-side Markdown Table GeneratorPaste CSV/TSV, get Markdown HTTP Status Codes ReferenceSearchable, plain-English