Developer builds 84 free browser-based tools with no signup, ads, or server tracking

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A developer has launched encoder.guru, a collection of 84 free tools that run entirely in the browser, requiring no account creation or server-side data processing. The suite covers a wide range of developer needs, including JWT building and verification, AES-256 encryption, JSON formatting, PDF manipulation, and subnet calculation. Frustration with existing tool sites that displayed heavy ads, required signups, or silently transmitted sensitive data to remote servers motivated the project. All cryptographic operations use the browser's native Web Crypto API, while PDF handling relies on pdf-lib and pdfjs-dist — keeping the toolset lightweight and auditable. The project was built using vanilla HTML, CSS, and JavaScript with no frameworks or build steps, allowing new tools to be shipped quickly.

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