Privacy Policy

Introduction

DiffNexa (“DiffNexa”, “we”, “us”) provides tools at diffnexa.com that compare two versions of a document, or a public web page against a baseline you saved, and show what changed with the evidence behind each change. This policy covers the website and those tools. If you have a question about it, write to info@diffnexa.com.

Information we collect

DiffNexa handles two kinds of information:

• Information you provide when you use a tool or write to us: the files you compare, the web addresses you check, labels you type, baseline files you upload, and the emails you send.
• Information collected automatically when your browser talks to our servers, and by Google Analytics: technical details of each request, and how the site is used.

DiffNexa has no accounts, so it holds no profile about you, no password and no history of what you have compared.

Information you provide

• Files and web addresses. Explained in the next two sections.
• Labels. Some tools let you type a label, such as a competitor's name, a product name or a page type. The label is saved in the baseline file on your device and sent with a comparison so it can appear in your result. It is not stored by DiffNexa.
• Emails. If you write to info@diffnexa.com, we receive your email address, your message and anything you attach. We use them to reply and to deal with what you asked. Please do not send confidential documents unless we ask for a specific file to investigate a problem.

Uploaded files and comparison data

This applies to PDF Compare, DOCX Compare and Excel Compare.

• Before anything is sent, your browser checks each file you choose, for example that it is the right type and can be opened. That check happens on your device.
• When you choose to compare, both files are sent over HTTPS to our website's server, which passes them to DiffNexa's comparison service. The service reads the two files, compares them and returns the result.
• While a comparison runs, the files are held in the service's memory. A large upload may be buffered in a temporary file on the server for the length of that request. When the request ends, the files are discarded. They are not saved to a database or file storage, and we cannot retrieve them afterwards.
• The result is sent back to your browser and exists only in the open page. Closing or reloading the page removes it. The PDF pages shown in a result are drawn in your browser from your own files.
• Our code does not write file names, file contents or comparison results to logs. We do not use your files or results to train AI models, and we do not sell them.

Web addresses you submit

This applies to Website Change Detector, Policy & Terms Monitor, Competitor Monitor and Price Monitor.

• When you capture or check a page, the address you enter is sent to DiffNexa's comparison service, which fetches that one public page as DiffNexaBot. It follows the site's robots.txt rules, refuses private and internal network addresses, and does not run the page's JavaScript or load its images, scripts or other files.
• The page's text and structure are returned to your browser. When you capture a page, you download the result as a baseline file that stays on your device. When you check the page later, you upload that file again; it is used for that comparison and then discarded.
• The website you check receives a request from our server, not from your browser. We do not send it your IP address or anything that identifies you. It may log the request under its own policies.
• DiffNexa does not keep the addresses you check, the pages it fetched or your results.

AI Change Analyst

AI Change Analyst is optional. Nothing is sent to an AI service unless you choose to run it after a comparison.

• What is sent: the list of changes the comparison already found — the type of each change, where it is, the values before and after, and short quoted excerpts from each version. The number of changes and the length of each excerpt are limited. Your complete files, or a whole web page, are never sent.
• Who receives it: the third-party AI provider DiffNexa is configured to use. DiffNexa supports Google Gemini or a provider offering an OpenAI-compatible service, and every analysis names the provider that produced it. The provider handles the request under its own terms and privacy policy.
• What is kept: neither the request nor the reply is stored. The comparison service logs only counts for each analysis — how many changes, how much text was processed and how long it took — to follow usage and cost. The logs never contain your content.

Automatically collected information

• Request details. When your browser loads a page or uses a tool, our servers receive the standard details every web request carries, such as your IP address, your browser's user agent, the address requested and the time.
• Limits on use. To stop any one visitor overloading the service, our website counts recent comparisons, page checks and AI analyses per IP address. These counts are held in the server's memory only. They are not written to a database, and they expire within an hour or when the server restarts.
• Hosting logs. Our hosting providers may keep standard technical logs of requests, such as IP addresses, times and the pages or services requested, under their own policies. These logs do not contain the files you upload.
• Analytics. Google Analytics collects information about how the site is used. See Analytics.

Cookies and similar technologies

DiffNexa's own code does not set cookies, and it does not use your browser's storage to track you.

Google Analytics sets first-party cookies whose names begin with _ga (for example _ga and _ga_ followed by an identifier). They distinguish one visitor and one visit from another, and by default they can last up to two years.

You can block or delete cookies in your browser's settings. Blocking the Google Analytics cookies does not affect the tools. DiffNexa does not use advertising cookies today; see Advertising and Google AdSense for what would change if it did.

Analytics

DiffNexa uses Google Analytics 4, a service provided by Google, to understand how many people visit the site, which pages they use and how they found it. Google Analytics collects information such as:

• the pages you view and the site that referred you;
• an approximate location, such as country or city, derived from your IP address;
• your device type, browser, operating system and screen size;
• when and for how long you visit, and basic interactions such as scrolling or following a link to another site, when those measurement settings are switched on.

DiffNexa does not send Google Analytics the files you compare, their names, the addresses you check, your comparison results or AI analyses.

Google processes this information under its own policies. You can read how Google uses information from sites that use its services, and you can stop Google Analytics collecting information about your visits with the Google Analytics Opt-out Browser Add-on.

Advertising and Google AdSense

DiffNexa does not currently show advertising. We may show advertising in the future, for example through Google AdSense. We will update this policy before advertising is switched on and, where the law requires it, ask for your consent first.

When advertising is enabled

• Third-party vendors, including Google, use cookies to serve ads based on a user's prior visits to this website or other websites.
• Google's use of advertising cookies enables it and its partners to serve ads to users based on their visits to this site and/or other sites on the Internet.
• You may opt out of personalized advertising by visiting Google's Ads Settings. You can also opt out of some third-party vendors' use of cookies for personalized advertising by visiting www.aboutads.info.
• If other advertising networks are used, they will be named in this policy with links to their websites and opt-out options.

How we use information

• To provide the tools: to compare your files, fetch the pages you ask about, and run AI Change Analyst when you ask.
• To keep the service reliable and fair: to limit how much one visitor can use it and to diagnose errors.
• To understand how the site is used, through Google Analytics, so we can improve it.
• To reply to messages you send us.
• To meet legal obligations, and to protect the service and the people who use it.

We do not sell personal information, and we do not build profiles of the people who use DiffNexa.

How we share information

• Service providers that run parts of DiffNexa for us, listed in the next section. They receive only what their part of the service needs.
• Websites you ask us to check receive a request from DiffNexaBot for the page you named.
• When the law requires it, or where it is necessary to protect the rights, safety or security of DiffNexa, its users or others.

Service providers and hosting

• Hostinger hosts the diffnexa.com website and its server. See Hostinger's privacy policy.
• Render hosts DiffNexa's comparison service, which processes your files and fetches web pages. See Render's privacy policy.
• Google provides Google Analytics. See Google's privacy policy.
• The AI provider configured for AI Change Analyst receives requests only when you run it, as described above.

Data retention

• Files you compare: discarded when the comparison request ends. Not stored.
• Comparison results: kept only in your open browser page.
• Baseline files: kept on your device, under your control. DiffNexa keeps no copy.
• Web pages fetched for you: not kept after your result is returned.
• AI Change Analyst requests and replies: not kept. Usage counts without content may appear in the comparison service's logs, which are kept under our hosting provider's log retention.
• Usage-limit counts: held in memory and gone within an hour.
• Analytics: kept by Google for the retention period set in DiffNexa's Google Analytics account.
• Emails: kept for as long as needed to deal with your message and any follow-up. You can ask us to delete them.

Data security

• Pages and uploads travel over HTTPS.
• The comparison service is set up to accept requests only from DiffNexa's own website.
• Uploaded files are treated as untrusted: macros are never run, spreadsheet formulas are never calculated, and links inside documents are never followed.
• The page fetcher refuses private and internal network addresses, and limits how long it waits and how much it reads.
• Keys for the AI service are kept on the server and are never sent to your browser.

Keeping as little as possible is also a safeguard: what is not stored cannot be exposed later. Still, no method of sending or processing information over the internet is completely secure, and we cannot guarantee absolute security.

Your choices and requests

• You choose what to compare and which pages to check. Do not submit anything you are not comfortable sending.
• You can use every tool without AI Change Analyst. Nothing is sent to an AI service unless you ask.
• You can block cookies in your browser, or use the Google Analytics Opt-out Browser Add-on. The tools work the same either way.
• Depending on where you live, you may have the right to ask for access to, correction of or deletion of personal information about you, or to object to how it is used. Email info@diffnexa.com with your request. Because DiffNexa keeps no accounts, files or results, most requests will concern emails you have sent us or analytics data held by Google.

Third-party links

DiffNexa links to other websites, such as Google's settings pages, and its results show the addresses of pages you checked. Other websites have their own privacy practices, which this policy does not cover.

Children's privacy

DiffNexa is a general-purpose tool for comparing documents and web pages. It is not directed at children, and we do not knowingly collect personal information from children. If you believe a child has sent us personal information, contact us and we will delete it.

International data transfers

DiffNexa's service providers may process information in countries other than the one you live in, whose data-protection laws may differ from yours. Where that happens, the information is handled under the providers' own safeguards and policies, linked above.

Changes to this policy

If DiffNexa changes how it handles information — for example, if it introduces accounts or advertising — this policy will be updated first, and the date at the top of the page will change. Significant changes will be described on this page.

Contact us

For questions about this policy or a privacy request, email info@diffnexa.com. You can also use the contact page. The Terms of Service explain the rules for using DiffNexa.