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    Quick Info

    Best For

    Developers, security-conscious teams, and anyone working with sensitive data who needs offline-capable utility tools

    Category

    AI Daily

    Key Features

    JSON formatter and validator
    SQL formatter
    JWT decoder
    RSA key generator

    Community Rating

    Secure Devutils

    free • From Free
    Updated Jun 2026

    Secure Devutils is a privacy-first developer toolkit built as a progressive web app that runs entirely in your browser. With 33 specialized utilities, it handles sensitive data like API keys, JWT tokens, and certificates without ever sending information to a server. Designed for developers working in regulated, air-gapped, or high-security environments, it works offline after the first load and requires no installation. Tools include JSON and SQL formatters, JWT decoders, RSA key generators, regex testers, and more — all processed client-side so your data never leaves the browser.

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    Pros

    • 100% client-side processing — no data ever leaves the browser
    • Works offline as a PWA after first load
    • 33 utilities covering formatting, encoding, crypto, and validation
    • Perfect for air-gapped or high-security environments
    • No installation or signup required

    Cons

    • No cloud sync or team collaboration features
    • Limited to browser performance for large datasets
    • No built-in documentation or tutorials for utilities
    • UI is functional rather than polished
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    All Features

    JSON formatter and validator
    SQL formatter
    JWT decoder
    RSA key generator
    Regex tester
    Base64 encoder/decoder
    URL encoder/decoder
    Hash generators (MD5, SHA-256)
    HTML entity encoder/decoder
    Cron expression parser
    UUID generator
    Diff checker

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