PRIVACY
How Diff Master handles your comparison data
Diff Master is designed for local comparison. Your comparison stays in your browser so you can review changes without an account or a saved comparison history.
Comparisons run locally in your browser.
Files and comparison content are not uploaded or stored by Diff Master.
Use the core tools offline after the required app files have loaded.
Comparison data stays on your device
Diff Master processes the files and text you compare in your browser. Comparison content, file names, extracted text, rendered pages and results are not sent to Diff Master for comparison.
No comparison history
We do not provide accounts, saved comparisons or cloud history. Replacing an input, clearing a comparison, refreshing the page or closing the tab ends that local comparison session.
Offline use has a clear boundary
Your browser needs a network connection the first time it loads the current app files. After the required app files have loaded and been cached on that browser, you can use the core comparison tools offline. Clearing site data, a new app version or disabled browser storage can require another online load.
No sign-up for comparison
You can use Diff Master without creating an account. We do not ask you to register before you compare files, text, code, JSON or Markdown.
Website analytics is separate from comparison data
Diff Master uses Google Analytics 4 on public pages to understand visits and improve the site. Google may receive the page URL, referral information, browser and device information, approximate location and engagement measurements. Diff Master does not add comparison inputs, file names, extracted text, rendered pages or diff results to analytics events.
Analytics identifiers and controls
Google Analytics may use cookies or similar browser identifiers, depending on your browser, region and settings. You can limit analytics through browser privacy controls, content blockers or Google’s available opt-out controls. Analytics cannot load while the site is being used offline.
Support email is separate from comparison
If you email support, that message is sent through your email provider and is not part of the local comparison process. Please do not send the files, text, passwords, API keys or other sensitive content you are comparing.
Contact Diff Master safelyKeep this page aligned with the product
This page describes the comparison-data boundary for Diff Master. If a future feature changes how comparison data is processed, stored or transmitted, this page must be updated before that feature is made available.
Learn more in Google’s Privacy Policy.
Last updated: July 26, 2026.