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OneUtil/

Privacy

Privacy

Short version: what you type into these tools never leaves your browser. The site does show ads, and those are served by Google, which does track for ad personalisation. Both things are true and they’re worth keeping separate.

What stays on your device

Every tool runs entirely as JavaScript in your browser. There is no backend, no account, and no upload step. That includes the things you’d most want to keep private:

  • PDFs you open, edit, split, or redact — they are read into memory and never transmitted.
  • JWTs and the secrets you verify them with.
  • Passwords, hashes, and any file you drop onto the hash or Base64 tools.
  • Diagrams, JSON documents, Markdown drafts, and bookmarks, saved in your browser’s own storage.

You can verify this: open your browser’s network panel and use any tool. Apart from the two exceptions below, nothing is sent anywhere.

What does leave your device

  1. Ads. This site is free and supported by Google AdSense. The ad script sets cookies and may use your browsing to personalise what it shows. It is the only third-party script here. You can opt out of personalised ads in Google’s ad settings, and a content blocker will stop it loading at all — the tools work fine either way.
  2. The currency converter. It fetches exchange rates from Frankfurter (ECB data, no API key). It sends the currency pair, nothing else. Every other tool is offline.

Your consent choices

If you are in the UK, the EEA or Switzerland, you are asked for consent before any personalised advertising cookie is set, through Google’s consent message. You can change or withdraw that choice at any time with the Manage ad consent link in the footer of any page. Declining does not switch anything off — the tools behave identically either way, you simply get non-personalised ads.

Wherever you are, you can opt out of personalised advertising in Google’s ad settings, and a content blocker will stop the ad script loading at all.

Analytics

There are none. No analytics product, no error reporting, no session recording, no fingerprinting. Nothing counts your visits except Google’s ad serving.

Storage

Preferences (theme, sidebar, recent tools) live in localStorage. Bookmarks and diagrams live in IndexedDB. All of it is on your machine, and clearing your browser data removes it. Nothing syncs.

Contact

This is a personal project, hosted free. For any privacy question — including a request to understand what is stored — email hello@oneutil.dev. There is more about the project on the about page, or you can go back to the tools.