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Technology
Developer tools to format code, encode text, and look up common technical values.
Base64 DecoderDecode Base64 into UTF-8 text and reject values with bad characters or padding.
Base64 EncoderEncode text as Base64, including Unicode. This is encoding, not encryption.
CIDR CalculatorFind the network, broadcast, mask, and usable range for an IPv4 CIDR block.
Cron GeneratorBuild a five-field cron expression and read a plain-language description.
CSS FormatterFormat CSS with Prettier. The stylesheet is not applied to this site.
Hash GeneratorHash text with SHA-256, SHA-384, SHA-512, or legacy SHA-1. A hash is not encryption.
HTML FormatterFormat HTML with Prettier. The markup is not rendered or executed.
HTTP Status CodesLook up common HTTP status codes, what they mean, and what to do next.
JavaScript FormatterFormat JavaScript with Prettier. The code is never executed.
JSON FormatterFormat, validate, and minify JSON in the browser. Nothing you paste is uploaded.
JSON to YAMLConvert valid JSON into YAML with a maintained parser. Invalid JSON is rejected.
JSON ValidatorCheck whether text is valid JSON and see a readable error when it is not.
JWT DecoderView a JWT header, payload, and signature locally. This does not verify the signature.
Regex TesterTest a JavaScript regular expression against a sample and see each match.
SQL FormatterFormat a SQL statement for reading. It is not executed against a database.
Unix TimestampConvert Unix seconds or milliseconds to local time, UTC, and ISO 8601.
URL DecoderDecode a percent-encoded URL component and explain values that are not valid.
URL EncoderEncode or decode a URL component with encodeURIComponent and decodeURIComponent.
User-Agent ParserRead a browser, OS, device, and engine from a User-Agent string. Detection is imperfect.
UUID GeneratorGenerate version 4 UUIDs with the browser's cryptographic random source.
XML FormatterFormat or minify well-formed XML and report a missing end tag.
YAML to JSONConvert YAML into formatted JSON. Indentation and colon errors are reported.