All 55 developer tools
Every tool, organized by category. Press Ctrl+K to search instead.
Formatters
11 toolsJSON FormatterFormat, validate, and minify JSON data.JSON DiffCompare JSON documents and inspect their differences.JSON Schema ValidatorValidate JSON data against JSON Schema draft 2020-12.SQL FormatterFormat SQL queries across common database dialects.HTML FormatterBeautify HTML markup with readable structure.CSS FormatterFormat CSS rules, selectors, and media queries.JavaScript FormatterFormat modern JavaScript code using Prettier.HTML MinifierCompress HTML by removing comments and unnecessary whitespace.CSS MinifierCompress stylesheets while preserving strings and URLs.JavaScript MinifierCompress modern JavaScript with Terser.XML FormatterBeautify XML with readable indentation and precise parse-error locations.
Converters
10 toolsBase64Encode text to Base64 or decode Base64 safely.URL EncoderEncode and decode URL component strings.Base64 File EncoderEncode files to Base64 or restore files from Base64 data.Timestamp ConverterConvert Unix timestamps and dates, with UTC, ISO 8601, and relative time.Number Base ConverterConvert exact integers between binary, octal, decimal, and hexadecimal.JSON YAML ConverterConvert documents between JSON and YAML.Color ConverterConvert colors between HEX, RGB, HSL, HSV, and CMYK with alpha.HTML Entity EncoderEncode and decode HTML special-character entities.XML JSON ConverterConvert between XML and JSON with configurable attribute handling.CSV JSON ConverterConvert between CSV and JSON with a choice of delimiter and header row.
Security
7 toolsJWT DecoderInspect JWT headers and payloads without verification.JWT GeneratorCreate locally signed HS256 tokens for development.Hash GeneratorHash text with MD5, SHA-1, SHA-256, SHA-384, and SHA-512 at once.Password GeneratorGenerate secure random passwords locally in your browser.RSA Key Pair GeneratorGenerate a real RSA public/private key pair in PEM or DER.AES Encrypt / DecryptEncrypt or decrypt text with AES-256-GCM, keyed by a passphrase.Bcrypt HashHash and verify text with bcrypt at a chosen cost factor, in a Web Worker.
Utilities
13 toolsUUID GeneratorGenerate one or more UUID v4 values.UUID Bulk GeneratorGenerate batches of up to 100 UUID v4 identifiers.Random String GeneratorGenerate secure random strings with custom character sets.Regex TesterTest JavaScript regular expressions against text.Regex Replace TesterTest JavaScript regular-expression replacements.Cron ParserExplain six-field cron expressions.URL ParserInspect the protocol, host, path, query, and fragment of a URL.Query String ParserDecode query strings into readable parameters and JSON.Query String BuilderAdd key-value pairs and generate a properly encoded query string or full URL.Markdown PreviewWrite Markdown and preview its rendered output instantly.QR Code GeneratorGenerate a QR code from text, a URL, Wi-Fi details, or a vCard.Meta Tag GeneratorGenerate meta, Open Graph, and Twitter Card tags with a live preview..gitignore GeneratorSearch and combine language, framework, and editor templates into a .gitignore.
Reference
4 toolsNetwork
4 toolsIPv4 Subnet CalculatorCalculate network/broadcast addresses, host ranges, and VLSM splits from a CIDR block.MAC Address LookupFind the manufacturer behind a MAC address's OUI prefix, search which OUI blocks a vendor holds, or batch-lookup many addresses at once.MAC Address GeneratorGenerate random MAC addresses with a vendor OUI prefix, unicast/multicast and administration bits, and Cisco dot-notation output.IPv6 ULA GeneratorGenerate RFC 4193 Unique Local Address /48 prefixes from a random or MAC-based SHA-1 Global ID, and list their /64 subnets.
Text
6 toolsText DiffCompare two blocks of text by character, word, or line.Case ConverterConvert text between camelCase, snake_case, kebab-case, and more.Lorem Ipsum GeneratorGenerate placeholder text by words, sentences, or paragraphs.SlugifyTurn text into a URL-friendly, transliterated slug.Text StatisticsCount characters, words, sentences, and paragraphs, with reading time.Whitespace RemoverCollapse repeated spaces, blank lines, and trim each line of text.