Date Calculator: difference of days and time addition

Calculate how many days between two dates, or add/subtract days, weeks, months and years to any date. With breakdown in years, months, weeks and hours.

Runs 100% in your browser — files never leave your device.

Web vs Desktop

Use web for fast tasks. Download the App for heavy duty.

The browser is great for quick, daily tasks like generating a UUID, verifying a hash, or converting a color. But if you need video/audio conversion, archive compression, larger files, or long batches, the Nua Convert desktop application gives those jobs a native local workspace without browser memory limits.

Nua Convert Web

Your pocket Swiss Army knife in the browser

Ready Instantly

Immediate use of text tools, hash, developer utilities, and UUID
100% private and local processing in your current active tab
Real-time data format validation and rendering (JSON, CSV, JWT)
Video/audio conversion and archive compression inside this web tab
Large files without the memory limits of a browser tab
Long conversion queues that keep running in a native app window

Free on Web

Nua Convert Desktop

Full local power of your computer

Free Download!

Everything from web version, 100% offline with instant performance
Video/audio conversion: process multimedia locally with FFmpeg
Archive compression: handle heavier local files outside the browser sandbox
Batch queues: convert many files in one native workspace
Offline video/audio conversion without browser memory limitations
Maximum multi-threaded performance using 100% CPU/RAM

Free Download Immediate start + flexible plans for professionals

Download Installer Google Play