Last updated: 12 September 2026
Short version: our tools run in your browser. What you type into a tool — the numbers, the text, the files you open — is never collected, stored, sold, or shared, because it never leaves your device in the first place. There is nothing we could hand over even if we wanted to. Separately from that, this site is funded by advertising and uses analytics: Google AdSense and Google Analytics both load only after you accept on the cookie banner, and both set their own cookies and storage when they do. This policy covers both halves.
Done In Browser is an independent, one-person project and is the controller of the limited personal data described here. For any privacy question, email [email protected] or use the contact page.
Nothing you enter leaves your device. Every calculator, converter, generator and formatter on this site processes your input locally in JavaScript in your own browser. There is no backend, no database, and no endpoint that tool input is submitted to. You can confirm this for yourself by opening your browser's developer tools (Network tab) while you use a tool: you will see the page load, and you will see the advertising and analytics requests described below if you have accepted them, but you will not see your inputs going anywhere. Shareable URLs encode your inputs in the URL itself, so anyone you send that link to can see those inputs — but we do not have a copy.
This is the claim that the “we don't collect, store, sell, or share” line above is about, and it is limited to tool input data. It is not a claim that no third party ever sees anything about your visit. Advertising and analytics are third-party services, they do run on this site once you consent, and they are described in full below.
This site displays advertising served by Google AdSense (publisher ID pub-9001818132101390). The AdSense script is not present in the page markup; it is injected by our cookie banner only if you click “Accept all”. If you reject, or if you have not yet answered the banner, no advertising script is loaded and no advertising cookies are set by us or by Google through this site.
Once advertising is loaded, the following applies:
https://adssettings.google.com).https://www.aboutads.info).In serving ads, Google may process technical data about your visit, including your IP address, the page URL, your browser and device type, and previously set advertising cookies. How Google uses this data is described in How Google uses information from sites or apps that use our services. Withdrawing consent through the Cookie settings link in the footer stops us loading the script again; cookies already set in your browser by Google can be cleared through your browser's site-data controls or the opt-out links above.
Pages served in embed mode (?embed=1, used by the small number of tools that support iframe embedding on other sites) never load the advertising script at all, regardless of consent state.
We use Google Analytics 4 (measurement ID G-D980GHWEWK) to understand which tools are popular and how visitors find the site. Like advertising, it loads only if you click “Accept all” — if you reject, it never loads and no analytics cookies are set. When active, it sets cookies (such as _ga and _ga_*) and sends aggregate usage data to Google, which may process it on servers in the United States. It does not receive the values you type into the tools. You can read how Google uses this data in its privacy & terms, and you can opt out across all sites with the Google Analytics Opt-out Browser Add-on.
The site is hosted on Cloudflare Pages. Cloudflare logs standard server data (IP address, browser type, requested URL) and sets a small bot-detection cookie, which is strictly necessary for security and is set regardless of your banner choice. We don't get analytics from this beyond what Cloudflare's dashboard shows in aggregate. Cloudflare's privacy policy covers what they do.
This is everything that can be stored in your browser by this site, including by third parties. Only the first two are set before you make a choice.
| Item | Set by | Category | Purpose |
|---|---|---|---|
cookie_consent_v1 (localStorage, not a cookie) | This site | Strictly necessary | Remembers whether you accepted or rejected, so the banner isn't shown on every page. |
| Cloudflare bot-detection cookie | Cloudflare (host) | Strictly necessary | Distinguishes human visitors from automated traffic. |
_ga, _ga_* | Google Analytics | Analytics — loaded only on consent | Distinguishes visitors and sessions for aggregate usage statistics. |
| Google advertising cookies and storage | Google AdSense and its ad partners | Advertising — loaded only on consent | Ad serving, frequency capping, personalisation based on prior visits, and click measurement. The specific names are set by Google, not by us. |
The older wording of this policy said the site stores “one item” in local storage. That is true of what we store, and it is still the only thing stored before you consent — but it was never a complete inventory of third-party storage, so the table above replaces it.
On your first visit you are asked to accept or reject non-essential storage, with no pre-ticked boxes and no cookie wall — the tools work identically either way. Your choice is stored locally and applies on return visits.
You can reopen the consent banner at any time via the Cookie settings link in the footer of every page, and change your answer. Withdrawing consent is as easy as giving it.
One honest limitation to state: our banner is a self-built consent notice, not a Google-certified consent management platform integrated with the IAB Transparency and Consent Framework. Visitors in the EEA, the UK and Switzerland may therefore be served non-personalised or limited ads.
Because we don't store your inputs, there's nothing for us to retrieve, correct, or delete on request. For the data processed by Google as a result of advertising and analytics, your rights are exercised through Google — the Ads Settings and opt-out links above are the direct routes, and Google's own privacy policy explains the rest. If you want Cloudflare's server log relating to your visit removed, or you have any other privacy question, email [email protected] and we'll help. If you're in the EU, UK, or California and you'd rather raise it with your local data-protection authority, you can.
If this policy changes materially, the “Last updated” date above changes too, and we'll re-prompt you through the cookie banner if any new processing requires consent.