Privacy Policy

Last updated: October 2026

TextDiffHub ("we", "us") is responsible for textdiffhub.com. This page describes the data we handle and the control you have over it. The summary: both texts you paste never leaves your device, because that is where the calculation runs.

Which tool this covers

The tool this page covers is TextDiffHub, a text diff checker. Put simply, it compares two texts at line, word or character level with inline highlights and context folding, and the way it does so is this: it runs the Myers difference algorithm to find the shortest edit script between the two inputs, then groups the changes so a moved block reads as one edit instead of a wall of noise. Everything stated here applies to that tool and the values it handles, and to nothing else.

In day-to-day use the tool works only from both texts you paste, and it is usually opened for things like reviewing a document revision. None of that reaches us, so none of it can be stored.

Data you give the tool

All processing happens on your device. Your input is handed to the page's own script, a result comes back, and that is the whole exchange. No request leaves your machine, and no copy of what you entered exists once the tab is closed.

How long data is kept, and how it is protected

Because your inputs are never transmitted, there is no store of personal measurements to retain or protect. Standard security practice applies to the site itself, including HTTPS on every page.

Under-13 users

The site is not designed for, or marketed to, children under 13, and we do not knowingly collect their personal information.

Rights you can exercise

Depending on where you live you may have the right to access, correct or delete personal information held about you, or to object to certain processing. Because we do not store what you enter, there is usually no personal data to produce — but you are welcome to ask.

When this policy is revised

This policy is reviewed when the site changes. Any material revision is shown by the "last updated" date at the top of the page.

Information collected as you browse

Standard server logs are generated when your browser requests a page. They cover technical details like your IP address, browser, referring URL and timestamps, and are used only to keep the site running and secure. None of it is linked to the input you give the tool.

Advertising, cookies and your choices

We set a cookie only to remember whether you have dismissed the cookie notice. Third-party advertising partners, including Google, may use cookies or similar technologies to serve ads based on your visits to this and other sites. You can control personalized advertising in your browser settings or through Google's ad settings. Blocking cookies does not affect the tool: the calculation requires none.

Analytics and aggregate statistics

Usage statistics, when collected, are anonymous and aggregated. They tell us which pages are useful; they do not identify you and they never include your input to the calculator.

The snippets you drop in

Anything you paste — a payload, a token, a configuration file — is processed in the browser. There is no upload step, which is rather the point: a private key stays exactly as private as it was before you pasted it.

Getting in touch about privacy

For any privacy question, use the contact page and we will reply.