privacy
How Diff Checker handles your data
This tool is local-first: it runs in your browser. To improve the product and understand how it is used, it also records what you do here and stores it on our servers. This page describes exactly what that includes. By using the tool you consent to this collection.
What we store
- Your activity — which actions you take and when.
- The content you process — the text, code, JSON, Base64 strings and other input and output you run through the tool. Do not enter anything here you would not want stored, including passwords, secrets or personal documents.
- Files you upload — the images, PDFs and other files you add are stored in our private file storage.
- Files the tool creates for you — the images, PDFs, icons and archives generated from your input are stored the same way, alongside the files you supplied.
- Your network and device — your IP address, an approximate location derived from it, your browser and operating system, language, time zone, screen and window size, and similar technical details your browser exposes.
- A device identifier — a random id kept in your browser’s storage so we can recognise return visits. It is also stored in a cookie so our servers can recognise the device. It is not tied to your name and clearing your browser storage resets it.
- Page views via Vercel Web Analytics — the hosting platform records which pages are visited, referrers, and coarse device and country data. It sets no cookies and identifies a visitor only by a hash that changes daily, so it cannot follow you across days or sites.
How long we keep it
Stored data is retained indefinitely unless you ask us to remove it.
Requesting deletion
To have your data deleted, use the feedback button in the tool (the message reaches James Argarin) and mention your device identifier if you have it. We will remove the associated records.