---
title: "How to import data in bulk from CSV files?"
description: "A guide on how to import data in bulk from CSV files"
url: https://help.crono.one/en/articles/31-how-to-import-data-in-bulk-from-csv-files
collection: "Settings"
updated: 2026-11-04
language: en
---

# How to import data in bulk from CSV files?

A guide on how to import data in bulk from CSV files

You can bulk import Contacts or Companies into Crono using a CSV file.

## 1\. Open the import tool

1.  Click your profile in the **bottom-left corner** of the app
    
2.  Go to **Account Settings**
    
3.  Click **Import Data**
    
4.  Select **Upload CSV File**
    

![](https://staticfiles.gleap.io/ghelparticle/IuN1bewgUPnEkQUpdfbYsxgfo09ZP7Ntkqryy9Ocp1GUs1bS4XhpZ536laKYjmVQzv6bgopau3c.png)

## 2\. Choose what you want to import

Select the type of data you are importing:

-   **Contacts:** Crono will also create the related Companies automatically, if they do not already exist
    
-   **Companies:** imports company records only
    

Choose one, then click **Next**.

![](https://staticfiles.gleap.io/ghelparticle/OxfsB7mYuSYcXC2rXiTdLHLMD0sKUe76VohuJtJr6iBQdXoawrK5c7N2zvm3ZW80fM2r5l6gNMy.png)

## 3\. Upload your file and choose how to handle duplicates

Upload your CSV, then pick one of the three options:

-   **Ignore duplicates:** existing records stay unchanged, and duplicate rows in your file are skipped
    
-   **Update duplicates:** existing records are updated with the data in your CSV
    
-   **Update duplicates and change ownership:** as above, and ownership is updated too
    

![](https://staticfiles.gleap.io/ghelparticle/zTDICP8GI4ehHhIi7aPQ8HRS9y7W7wuq2RvRiCokBdom9WfvAMJUzqHox37gIJLPSP7l8FbFHyi.png)

## 4\. Map your columns

Click each field box and choose, from the drop-down, the Crono field that matches that column in your file.

Keep **first name and last name in separate columns**, otherwise personalisation variables will not resolve correctly later.

![](https://staticfiles.gleap.io/ghelparticle/q8t9HpqARp6xN6HOpveD2TJQVcHd3yJPvRC4WAGcqnLzHMZS9hpnRttllAm5wcYj0k3ZErswvdN.png)

![](https://staticfiles.gleap.io/ghelparticle/gaZRLyfV888lxByb2LBn6iizGoZvPysyLsn5cr28ZYBPX3oFPSylTkUTqGVX3Tulij83gv7WG6W.png)

## 5\. Optional import settings

Before you finish, you can also:

-   **Add imported contacts to a List** — assign everything in this import to one of your existing Lists.
    
-   **Apply Tags to imported contacts** — tag everything in this import, so you can segment it later.
    

Both are far easier to do here than to apply afterwards across hundreds of records.

![](https://staticfiles.gleap.io/ghelparticle/py3PKooYyGTKesqxHYuvANiKw7YkFizZxZJsYjiKw7azo1B8YTwzX89z05flqYJAgDcaFlIM6dS.png)

## 6\. Run the import

With your columns mapped and the optional settings chosen, click **Import File** to finish.