Privacy Policy

This Privacy Policy explains what data CADXChange collects through the CADXChange website (the "Site") and the CADXChange desktop applications — BlockSync, BlockCopy, BlockCompare, TextSync, TextCompare, Dwg2Pdf, DwgSearch, P3DSync and LayerSync (each a "Tool") — and how it's used. CADXChange is operated by an independent software developer based in Japan.

Every Tool processes DWG files locally through AutoCAD's own engine (accoreconsole.exe) running on your computer. No drawing content, filename, file path, or extracted data (block attributes, text, layers, geometry) is ever uploaded to CADXChange, Stripe, or any other party. Excel exports, backups, and reports a Tool produces are written only to folders on your own machine that you chose. The only exception is a file you decide to send us yourself, described in section 4.

Each Tool contacts a license-verification service at startup and periodically while running. That check transmits only: the license key (Pro tier only), your computer's name, a one-way hash of the Windows machine identifier (the raw identifier is never sent), a random one-time value that prevents a reply from being reused, an identifier of the Pro module build shipped with the Tool (not personal), and your IP address. The server stores the IP address only as a keyed hash, together with the country it maps to, the time, and whether the request was accepted, for 30 days. This is used to rate-limit requests and to notice a license being shared across far more machines than its terms allow; such a notice is informational and never blocks a license automatically. No drawing content or file metadata is included in this check.

The first time you run a Tool, it asks whether you want to send anonymous usage statistics. The box is unticked by default, declining changes nothing about what the Tool can do, and you can switch it on or off at any time under Settings. Until you opt in, nothing is sent; when you switch it off, sending stops immediately.

If you opt in, a Tool sends: the Tool name and version; when it starts and exits; which feature was used (for example "extract to Excel" or "compare"), how many files that run covered — a number, never file names — how long it took and whether it succeeded, failed or was cancelled; a random identifier created each time the Tool starts, which only groups the reports of one run and is not kept on your computer; whether an update was offered, downloaded or failed, with the version number only; the Tool's edition (Free or Pro), the AutoCAD version, the Windows version and the interface language; the country the report comes from, which our server works out from the connection (the IP address itself is not stored with these records); when a license is activated or deactivated; and, if the Tool crashes or an operation times out, the name of the error type only (no stack trace, path or message). If a Tool cannot read a drawing, it also sends the drawing's format version (for example "AC1032"), the code page stored in the file header and a coarse class of the error (for example damaged or unsupported) — never the file name, the path or the error text. Each installation is identified by a random ID generated on your computer. That ID is not linked to your email address or license key, and we do not store your IP address with these statistics.

This is used only to see which Tools and features are used, which AutoCAD versions and languages matter, and what to fix first. Detailed records are kept for 90 days in our database and are then archived in compressed form for at least three years; only aggregated totals are kept beyond that in the dashboard. Because the ID is anonymous, we cannot look up or delete the records of a particular person; switching the setting off stops any further collection.

If you email us for support, we receive whatever you send us (your email address and message content) and use it only to respond to your request. If you subscribe to release notifications on the Site, we store the email address you provide for that sole purpose and it is never sold or shared for marketing by third parties. If you attach files to a support report on the Site, or press "Send this file to us" after the online viewer could not open a drawing, the files you chose are uploaded to private storage that only we can read. They are used only to reproduce and fix the problem, are checked for file type but not opened by anyone else, and are deleted automatically 90 days after upload. Nothing is uploaded unless you attach it or press Send; a drawing may contain your design data, so only send one you are comfortable sharing.

Pro license purchases are made through Stripe's Managed Payments service, in which Stripe is the merchant of record. Stripe collects your billing details (name, email, payment method, billing address) directly, to process payment, calculate tax and prevent fraud. CADXChange receives from Stripe the information needed to deliver and support your license — your email address, the product purchased, and the order/license identifiers — but never your full card number. Stripe's handling of your payment data is governed by Stripe's own Privacy Policy (https://stripe.com/privacy), in addition to this policy governing CADXChange's own handling of your data.

The Site does not use advertising scripts or advertising cookies. Cloudflare, which hosts the Site, provides us with aggregate, cookie-free traffic statistics. The Site also uses the analytics described below, and keeps logs to understand what visitors need and to improve the Tools. None of this is used on the administration pages, and none of it is switched on when your browser sends a Do Not Track or Global Privacy Control signal.

Visitor behavior analytics: the Site uses Microsoft Clarity, a service of Microsoft Corporation, to see how visitors use the pages — for example where they click, how far they scroll and where they get stuck — through anonymized session recordings and heatmaps. Clarity sets cookies in your browser to recognize a visit and a returning browser, and receives your IP address, browser and device type, approximate location and the pages you view. Text you type into form fields is masked and is not recorded. Microsoft processes this data under the Microsoft Privacy Statement (https://privacy.microsoft.com/privacystatement). We use the results only to improve the Site and do not use them for advertising.

Page statistics: the Site counts which pages are opened, how long they are actively read, how far they are scrolled and which downloads and links are used. This is stored without cookies or browser storage; a visitor appears only as an anonymous value that changes every day.

Homepage searches: the text you type into the search box, the Site language, the country your connection comes from (resolved at request time — your IP address is not stored), what the search returned, and which result, if any, you opened. No IP address, cookie or other identifier is stored with a search, so searches cannot be linked to you or to one another. Search text is also sent to Cloudflare's Workers AI service to find matching results. Please don't type personal information into the search box.

Online DWG viewer: the viewer counts how it is used, never what is in it. When the page loads, and when a drawing is opened or exported to PDF, it records the type of event, whether it worked, how long it took, the file type (DWG or DXF), a size range, the Site language and the country your connection comes from. When a drawing does not open properly it also records the drawing's format version (for example "AC1032"), the code page stored in its file header, where in the opening sequence it failed, a coarse class of the error, whether it opened empty, your browser family, and your device's memory range as the browser reports it. File names and drawing content are never sent — drawings are opened entirely in your browser. No IP address or cookie is stored, and the random identifier that groups one visit's events exists only until you close the page.

Download clicks: when you click a download button we record the product and version, the time, the Site language, your approximate location (country, region, city), your IP address, browser user agent and the referring page, in order to count downloads and filter out automated traffic.

License and support records are kept for as long as needed to provide the license and related support, and as required for tax and accounting purposes. License-check request logs (described in section 2) are deleted after 30 days. You can ask us to delete personal data we hold about you (see "Your Rights" below); this doesn't affect billing/transaction records CADXChange and Stripe are legally required to retain for tax and accounting purposes.

Depending on where you live, you may have the right to access, correct, or delete personal data we hold about you, or to object to or restrict certain processing. To exercise any of these rights over data CADXChange holds directly, email us at the address below. For data held by Stripe as the merchant of record (full payment method details), contact Stripe directly, or reach us and we'll relay the request.

CADXChange is operated from Japan, and Stripe operates globally. Data described in this policy may be processed in Japan or other countries where CADXChange or Stripe operate, with appropriate safeguards where required by applicable law.

The Software and Site are intended for professional/business use and are not directed at children. We do not knowingly collect personal data from children.

We may update this policy from time to time; the "Updated" date at the top reflects the latest revision. Material changes will be reflected here before they take effect.

Questions about this policy or your data: support@cadxchange.net.