All processing happens in your browser. We never see your data. Not a single byte leaves your machine.
about
WhetKit.
A collection of privacy-first developer tools that run entirely in your browser. No data ever leaves your device. No servers, no uploads, no tracking.
why WhetKit?
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100% private
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no servers
Every tool is a static HTML file. There is no backend, no database, no API — just pure front-end code.
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no tracking
We use GoatCounter for basic analytics — privacy-focused, no cookies, respects Do Not Track.
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always free
Every tool is and will remain free. No premium tiers, no paywalls, no account required.
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works offline
Once loaded, most tools continue working without internet. Built as progressive web apps.
built with
HTML
Vanilla JS
CSS custom properties
zero frameworks
GoatCounter
GitHub Pages
We're actively adding new tools. If there's a developer tool you'd like to see, let us know. Our goal is to build a comprehensive toolkit that covers the most common daily needs of developers — from encoding and formatting to validation and conversion.