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A focused toolbox for 2FA, passwords, QR codes, hashing and everyday development tasks. Sensitive values stay in your browser.

4 toolsProcessed on this deviceNo account

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JSON Formatter

Format, minify and validate JSON with useful error locations.

VALID JSON ✓
{ "safe": true, "speed": "0ms" }
PARSER TREECLEAN FORMAT
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Processed on this device
Developer

JWT Decoder

Inspect JWT header and payload without verifying or uploading the token.

TOKEN INSPECTORHS256
eyJhbGci....eyJzdWIi....SflKxwR...
HEADER · PAYLOAD · SIGNATUREVALID
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Developer

UUID Generator

Generate UUID v4 values using browser cryptography.

RFC 4122 v4CSPRNG
4f7d2b8c-9a1e-4c7b-8d3f-e1a2b3c4
RANDOM BITS: 122COLLISION: 0%
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Processed on this device
Developer

Timestamp Converter

Convert Unix seconds or milliseconds to readable time and back.

EPOCH CONVERTERUTC / LOCAL
1724502000➔2026-08-24
MILLISECONDS / SECONDSISO-8601
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2FA & OTP2 toolsPasswords2 toolsQR Code2 toolsEncoding & Hashing3 tools
All Systems Nominal·WebCrypto CSPRNG Sandbox
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SFranKeySFranKeySecurity & Developer ToolsSecurity and developer tools

Private-first tools for security and development.

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Ecosystem & Support

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Sfrankie EmailTemp Mail

Disposable temporary inbox service. Receive OTP verification codes without spam.

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