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Developer
Free Developer calculators and browser tools. Instant results, no sign-up required.
Unix Timestamp ConverterConvert Unix timestamps to human-readable dates and back.→JSON Formatter & ValidatorFormat, validate, and inspect JSON in your browser.→JSON MinifierMinify valid JSON to a compact single-line form.→Base64 Encoder / DecoderEncode text to Base64 or decode Base64 back to text.→URL Encoder / DecoderEncode or decode URL components safely.→UUID GeneratorGenerate one or many cryptographically random UUID v4 values.→Number Base ConverterConvert numbers between binary, octal, decimal, and hexadecimal.→Regex TesterTest regular expressions against text and inspect matches.→HTML Entity Encoder / DecoderEncode special HTML characters or decode HTML entities.→JWT DecoderDecode JWT header and payload locally without verifying the signature.→