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    universaldevtools.in

    74 tools / no account / runs in your browser

    Free online developer tools that run in your browser

    Format JSON, decode a JWT, hash a string, convert YAML or generate test data. Paste your input, get the result, copy it. Nothing you paste is uploaded.

    Or jump to all 74 tools and the guides.

    most used8
    1. 01JSON FormatterFormat, beautify, and validate JSON data
    2. 02Base64 Encoder/DecoderEncode and decode text to/from Base64 format
    3. 03Password GeneratorGenerate secure, random passwords with customizable length and character sets
    4. 04QR Code GeneratorCreate QR codes from text, URLs, or data
    5. 05UUID GeneratorGenerate UUIDs (v1, v4, v7) for unique identifiers
    6. 06Hash GeneratorGenerate MD5, SHA-1, SHA-256, and SHA-512 hashes
    7. 07JWT DecoderDecode and inspect JSON Web Tokens
    8. 08Unix Timestamp ConverterConvert between Unix timestamps and human-readable dates

    Every tool, by category

    Open the full index

    How it runs

    01 / processing
    Every tool is plain JavaScript running in your tab. JSON, tokens, passwords and files are processed locally and never sent to a server.
    02 / no account
    No sign-up and no usage limits. Once a page has loaded, most tools keep working offline.
    03 / what we collect
    Google Analytics counts page views and Google AdSense shows ads that fund the site. Details are in the privacy policy.

    Questions

    Are these tools free to use?
    Yes. Every tool is free, with no account and no usage limits. The site is supported by ads.
    Is my data safe when using these tools?
    The tools process your input in your browser with JavaScript, so the text, files, and keys you paste are not uploaded to our servers. The site does use Google Analytics for anonymous page statistics and Google AdSense for ads; the privacy policy explains both.
    Can I use these tools offline?
    Once a tool page has loaded, most tools keep working without a connection because all processing happens in your browser.
    What types of developer tools are available?
    There are 74 tools across 9 categories: generators, mock data, text and string tools, encoders and decoders, converters, hash and crypto, formatters, utilities, and calculators.