Developer Tools
Fast, free utilities for everyday dev tasks. No signup, no install — just paste and go.
Computer Science
Binary / Hex / Decimal ConverterConvert exact integers between base 2, 10, and 16ASCII / Unicode ExplorerInspect characters, code points, bytes, and escapesBitwise Operations CalculatorEvaluate AND, OR, XOR, NOT, and bit shifts by widthTwo's Complement CalculatorConvert signed decimals to fixed-width binary and backTruth Table GeneratorGenerate propositional logic truth tables in the browser
Code & Markup
Text / Code Diff CheckerCompare text or code with readable diff outputRegex TesterTest regex patterns with live highlightingHTML FormatterFormat or minify HTML codeCode FormatterFormat CSS, JS & TypeScript with PrettierMarkdown to HTMLConvert Markdown to HTMLXML Formatter & ValidatorFormat, minify, and validate XMLSQL FormatterFormat SQL queries with dialect-aware rulesCron Expression ParserExplain cron schedules and preview upcoming run timescURL to fetch / AxiosConvert curl commands into fetch or axios codeHTML to JSX ConverterConvert pasted HTML into JSX-friendly markup
JSON & Data
JSON ValidatorValidate & pretty-print JSONJSON FormatterFormat, minify, and filter JSON by keysJSON VisualizerVisualize and filter JSON as an interactive node graphCSV to JSONTransform CSV data to JSONYAML ↔ JSON ConverterConvert YAML to JSON and JSON to YAMLQuery String Parser / JSON ConverterConvert query strings and flat JSON objects both waysJSON to TypeScript Interface GeneratorGenerate TypeScript interfaces from JSON samplesJSON Schema Validator / GeneratorValidate JSON with Draft 2020-12 or generate starter schemas
Encoders & Decoders
Base64 EncoderEncode or decode Base64 stringsURL EncoderEncode or decode URL stringsURL Parser / InspectorInspect normalized URL parts and decoded query parametersHTML Entity Encoder / DecoderEncode text as HTML entities or decode entities back to textMorse Code TranslatorTranslate text to and from Morse codeBinary Code TranslatorConvert text to binary and backROT13 / Caesar CipherEncode with ROT13 or Caesar cipher