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About Date Difference
Date Difference — free, private, browser-based calc tool
How many days, weeks, months between any two dates? It runs in your browser, so the file is processed on your own device.
Why use Date Difference
- ·Files stay on your device — nothing is uploaded
- ·No signup needed
- ·Works in any modern browser, on any OS
- ·Free daily use; Pro removes limits and watermarks
How to use it
- 1Type or paste your input.
- 2Pick the options you want.
- 3Copy or save the result.
What Date Difference does
How many days, weeks, months between any two dates?
How it works
math.js for symbolic computation, KaTeX for rendering LaTeX, and arbitrary-precision arithmetic via big.js / decimal.js. The processing code runs inside the page, so your file is not uploaded to a server — you can confirm this in your browser's DevTools → Network tab.
Frequently asked questions
Does Date Difference upload my files?+
No. Date Difference runs in your browser and processes the file on your device. Nothing is sent to our servers.
Is Date Difference free?+
Yes, with a daily free allowance and no signup. Xonvert Pro ($4.99/month) removes the daily limits and the watermark on exported files.
Do I need to install anything?+
No. It works in any modern browser on Windows, macOS, Linux, ChromeOS, Android and iPad.
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