Developer tools

Free developer utilities: Base64 and URL encode/decode, JWT decoder, UUID generator, hash generator, timestamp converter, regex tester and markdown preview. Client-side and private.

Base64 EncoderEncode plaintext or binary strings into standard or URL-safe Base64. Developer

Base64 DecoderDecode Base64 payloads back to UTF-8 plain text with error checking. Developer

URL EncoderPercent-encode query parameters and URI components safely. Developer

URL DecoderConvert percent-encoded URLs (%20, %2F) back into readable strings. Developer

HTML EncoderEscape special HTML entities like &, <, >, and ". Developer

HTML DecoderDecode HTML entities back to raw text markup. Developer

UUID GeneratorGenerate RFC 4122 compliant UUID v4 identifiers in bulk. Developer

Hash GeneratorCalculate cryptographic SHA-256, SHA-512, MD5, and SHA-1 hashes. Developer

JWT DecoderInspect header claims, payload, subject, and expiration status of JSON Web Tokens. Developer

Timestamp ConverterConvert human dates to Unix timestamps and vice versa with local timezone. Developer

Unix Timestamp TickerLive ticking epoch clock with 1-click current timestamp copy. Developer

Random String GeneratorGenerate secure alphanumeric strings, tokens, and test keys. Developer

Password GeneratorGenerate cryptographically secure passwords with custom entropy rules. Developer

Regex TesterTest regular expressions with live match highlighting and group extraction. Developer

Markdown PreviewLive split-screen markdown editor and rendered HTML previewer. Developer