NumTrans Privacy Policy

Last updated: August 19, 2026

Summary

NumTrans reads the text of the pages you visit locally, inside your browser, only to find currency amounts. Webpage content is never transmitted anywhere. To convert those amounts, the extension does make one kind of external request: it asks a public exchange-rate service for a daily rate, and that request contains nothing but a currency pair such as USD/INR.

What NumTrans is

NumTrans is a Chrome extension that detects US dollar, euro and pound sterling amounts on webpages and shows their approximate Indian rupee equivalent when you hover over them, formatted in lakh and crore.

There is no account, no sign-in, no dashboard and no subscription. There is no NumTrans server: we do not operate a backend that your browser talks to.

Reading webpage content

To find amounts, NumTrans inspects the text of the page you are viewing. This inspection happens entirely on your device, in your browser, as the page renders.

Page text is examined only to locate currency amounts. It is not stored, not logged, and not transmitted to us or to anyone else.
The extension reads text nodes only. It never uses innerHTML, and the page's visible text is left unchanged character for character.
It deliberately skips scripts, styles, form inputs, textareas, <code> elements and anything editable, so it does not read or alter what you are typing.
Content inside embedded frames is not scanned.

What is not collected

Your browsing history is not collected. The extension does not request the tabs, activeTab, history, cookies or scripting permissions, so it cannot see the list of pages you visit.
Page URLs are never sent anywhere.
Webpage content is never sent anywhere.
No analytics, telemetry or tracking of any kind is included.
No personal information is requested, collected or stored.
NumTrans does not load or execute any remote code.

Exchange rates and the one external request

Converting an amount requires an exchange rate, and rates change. NumTrans gets them from the Frankfurter API, a free public service that publishes European Central Bank reference rates. This is the only external service NumTrans contacts.

Each request carries only the currency pair being looked up — for example USD/INR. It contains no page content, no page URL, no account, no identifier and nothing that describes you or what you were reading. Requests are made by the extension's background service worker, not by the page you are viewing.

As with any request to any website, Frankfurter's servers will see your device's IP address and standard connection details. Their handling of that information is governed by their own policies, not ours. We receive none of it.

Rates are cached for the day, so a page containing fifty prices results in at most one request per currency — not one per amount. If the service cannot be reached, NumTrans falls back to the last cached rate and visibly labels it as older rather than presenting it as current. With no cached rate at all, it shows that conversion is unavailable and leaves the page alone.

Data stored on your device

NumTrans uses Chrome's storage permission to keep one exchange rate per currency per day, together with the date it was fetched. This is the only thing it stores.

That cache lives locally on your device, is not synced to any account, and is removed when you uninstall the extension. It contains exchange rates only — no browsing data of any kind.

Permissions and why they exist

Permission	Why it is needed
`storage`	Cache one exchange rate per currency per day, so the same rate is not requested repeatedly.
`https://api.frankfurter.dev/*`	The only host NumTrans contacts — to read those exchange rates.
Access to webpages	Run the content script that finds currency amounts on the page you are reading and shows the hover tooltip.

That is the complete list. NumTrans requests no tabs, activeTab, cookies, history or scripting permissions.

Accuracy of conversions

Converted values are approximate. They are based on daily reference rates, rounded for readability, and are intended to help you make sense of an unfamiliar amount at a glance. NumTrans is not a trading tool and its figures should not be relied on for financial decisions.

Children

NumTrans is a general-purpose browsing utility. It collects no personal information from anyone, including children.

Changes to this policy

If the extension's behaviour changes in a way that affects this policy, this page will be updated and the date at the top will change. Material changes will be reflected here before the updated version is published.

Contact

Questions about this policy or about how NumTrans works can be sent to support@atoice.com.