about

Who's behind PrivacyKit

PrivacyKit is built and maintained by one independent developer. There is no company behind it, no team and no investors — just an engineer who got tired of pasting passwords, JWTs and JSON into random websites that quietly upload everything to a server. I build the tools I wanted to exist: small, single-purpose and honest about what they do.

Why it exists

Most "free online tools" work by sending your input to a backend, processing it there, and sending the result back. For a colour converter that is harmless. For a password, a private key, a JWT that carries your session, or a photo with GPS coordinates buried in its metadata, it means handing sensitive data to a stranger's server and trusting their logging, their retention and their security. PrivacyKit exists to remove that trade-off: the tool runs where your data already is.

The client-side promise

Nearly every tool here runs entirely in your browser using JavaScript and the Web Crypto API. Your input is processed on your own machine and never reaches a server. You can confirm this yourself — open your browser's network tab, use a tool, and watch that nothing goes out.

Three tools are the honest exception, because their job is impossible without a network request, and each says so on its own page. What Is My IP asks Cloudflare which address your connection presents; DNS Lookup sends the domain you type to Cloudflare's DNS-over-HTTPS resolver; and the Password Leak Checker sends only the first five characters of your password's SHA-1 hash to Have I Been Pwned, never the password itself. The privacy policy spells out exactly what each one sends.

How it's funded

Every tool is free, with no signup and no account. Running the site costs little because there is no backend to pay for, but it isn't free to me, so PrivacyKit is supported two ways. Some pages link to products I would recommend anyway — password managers, VPNs, a domain registrar — and if you buy through one of those links I may earn a commission at no extra cost to you. Those links are always marked, and the affiliate disclosure explains the arrangement. Later, once the site qualifies, unobtrusive ads may appear; the privacy policy already describes how that will work before a single ad loads.

What I won't do is sell data, add tracking to the tools, or put anything behind a paywall. The funding model only works if the tools stay trustworthy, and that is the whole point of the site.

Get in touch

Found a bug, want a tool that isn't here yet, or spotted something inaccurate? I read every message — see the contact page.