How NumbersX Protects Your Privacy

Your chat history is personal. We built NumbersX to be 100% serverless and private.

100% Client-Side

When you upload a chat file, it never leaves your computer. The extraction happens entirely within your browser's memory.

Zero Data Persistence

We don't have a database. Once you refresh the page or close the tab, the extracted data is gone forever.

Manual Controls

You decide which numbers to save. You can prefix them, name them by group, and download them as a standard VCF file.

Open & Transparent

NumbersX is built with modern, standard web technologies. No hidden tracking, no data mining, no ads.

The Technical Flow

  1. 01The `.zip` or `.txt` file is read using the File API (standard browser feature).
  2. 02JSZip (a JavaScript library) unpacks the chat content in-memory.
  3. 03A Regex (Regular Expression) pattern scans the text for international phone number formats.
  4. 04The results are displayed and can be converted into a `.vcf` file for your contacts app.