Developer Utilities
JWT decoder, timestamp and number-base converters, hash and UUID generators, code formatters and archive tools.
19tools in this collection
DEVNewJWT DecoderDecode a JSON Web Token's header and payload, with exp/iat/nbf shown as readable dates and expiry status.DEVNewUnix Timestamp ConverterConvert Unix timestamps (seconds, ms, µs, ns) to dates and dates back to timestamps — one per line.DEVNewNumber Base ConverterConvert numbers between binary, octal, decimal and hexadecimal — arbitrarily large, one per line.DEVNewHash GeneratorGenerate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 checksums of text or any file.DEVNewBase32 EncoderEncode text or any file to RFC 4648 Base32 (used by TOTP secrets and many APIs).DEVNewBase32 DecoderDecode RFC 4648 Base32 back to text, or to a binary file when the content is not text.DEVNewHex DumpView the raw bytes of any file as an xxd-style hex dump with offsets and an ASCII column.DEVNewUUID GeneratorGenerate cryptographically random UUID v4, time-ordered UUID v7 or ULID identifiers in bulk.DEVNewPassword GeneratorGenerate strong random passwords with the browser's cryptographic RNG — length and character sets are adjustable.DEVNewCSS MinifierMinify CSS by stripping comments and whitespace to shrink stylesheets.DEVNewCSS BeautifierFormat minified or messy CSS into readable, consistently indented rules.DEVNewJavaScript MinifierShrink JavaScript by safely removing comments and whitespace, without renaming or rewriting code.DEVNewSQL FormatterFormat SQL queries with uppercase keywords and one clause per line for readable code reviews.DEVNewHTML BeautifierIndent and tidy HTML markup — nested tags on their own lines, inline text kept together.DEVNewCron Expression ExplainerExplain cron expressions in plain English and list the next run times — paste a whole crontab if you like.DEVNewFile to Data URIEncode an image, font or any file as a data: URI ready to inline in HTML or CSS.DEVNewData URI to FileDecode a data: URI (Base64 or URL-encoded) back into a downloadable file with the right extension.ZIPNewConvert Archive to TARExtract a ZIP, RAR or 7z archive locally and repack it as a TAR or TAR.GZ with folder paths intact.ZIPNewList Archive ContentsSee every file inside a ZIP, RAR, 7z or TAR archive with sizes and dates, without extracting it.
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Start with JWT Decoder here, or switch format inside the workspace.
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TXTJWT
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Decode a JSON Web Token's header and payload, with exp/iat/nbf shown as readable dates and expiry status.
The signature is not verified. Tokens are decoded locally and never sent anywhere.