Security & Privacy

Privacy-respecting security utilities. Passwords are generated with the browser’s cryptographically secure random number generator, hashes are computed with the Web Crypto API, and nothing you type is stored or transmitted. These tools help with good habits; they are not a substitute for a password manager or a professional security review.

UUID GeneratorGenerate random UUID v4 or time-ordered UUID v7 identifiers in bulk using your browser’s secure random generator.
JWT DecoderDecode a JSON Web Token to read its header and payload, with expiry and issued-at times in readable form.
Hash Generator (SHA)Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes and HMAC signatures of text using the browser’s Web Crypto API.
Password GeneratorGenerate strong random passwords with your choice of length and character sets, using your browser’s cryptographic random number generator.
File Checksum (SHA-256)Calculate SHA-256, SHA-384, SHA-512 and SHA-1 checksums of a file in your browser and compare them with the hash published by the download site.
Text Encrypt / DecryptEncrypt a private note with a password using AES-256-GCM and PBKDF2, then decrypt it later on this page.

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