> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.reach-book.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Import and export CSV files

1. [Prospects](/reach-book.com-docs/prospects)

# Import and export CSV files

Open **Import / Export** in the sidebar. Click **Blank template** to download a CSV with the right columns.

## Import

1. **Upload**: pick a CSV or TXT file up to 10 MB.
2. **Map columns**: common header names are matched for you. You must map either a **domain** or a **company** column. Rows with neither are skipped.
3. **Review**: check duplicates and choose what happens to rows that already exist:

* **Skip them** (default)
* **Update research fields**: fill in blanks and refresh notes
4. **Done**: see the import summary. You can add the new prospects straight to a draft campaign.

Optional: **Tag every imported prospect** and **Assign to** a teammate before you import.

### How duplicates are found

* Prospects are matched by email address.
* Without an email, they're matched by domain plus contact name.
* Duplicates inside the same file are merged.

### Time zones

Use names such as `Europe/Berlin` or `America/New_York`. Invalid time zones are flagged before import.

## Export

Click **Export all**. The export follows the filters you have on the prospect list and includes outcome, owner and dates.