Base64 Encode / Decode
Convert text to Base64 or back. Optionally encode a file or download decoded bytes.
JSON Format / Minify / Validate
Beautify, minify, or validate JSON with clear line/column error messages.
UUID v4 Generator
Cryptographically random UUIDs via crypto.getRandomValues.
Timezone Converter
Convert a datetime between IANA time zones. Shows local, UTC, and your target.
Local
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UTC
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Etc/UTC
Target
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SHA-256 Hash
Hash text with the Web Crypto API. Output is lowercase hex.
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