Programming
Programming tools.
Developer utilities that run entirely in your browser: generate UUIDs and hashes, decode JWTs, format JSON, encode data, convert timestamps, and more. Nothing you paste is uploaded.
10 tools
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Programming
UUID Generator
Generate one or many cryptographically secure UUID v4 identifiers locally.
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Hash Generator
Generate SHA-256, SHA-384, or SHA-512 hashes from UTF-8 text locally.
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JWT Decoder
Decode JWT headers, payloads, and registered claims locally without verification.
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Number Base Converter
Convert integers between binary, octal, decimal, and hexadecimal exactly.
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Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 to Unicode text entirely in your browser.
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Unix Timestamp Converter
Convert Unix timestamps to readable dates, or dates to epoch time in seconds and milliseconds.
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URL Encoder & Decoder
Encode or decode URL components and full URLs with browser-native percent encoding.
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JSON Formatter & Validator
Format, minify, and validate JSON directly in your browser.
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Password Generator
Generate strong, random passwords locally in your browser with custom length and character options.
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Cron Expression Converter
Convert cron expressions to plain English and build cron schedules from readable options, with upcoming run times.
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