Add contacts to your ProtonMail account from other services and import them into ProtonMail via the ProtonMail import tool(https://protonmail.com/support/knowledge-base/creating-or-editing-csv-files/).

Learn how to export the address book from other webmail services — choose your provider from the list below.

Yahoo!

To import your Yahoo! Mail address book, save your file as a Yahoo! CSV. Instructions are available in the Yahoo! Address Book help section at: https://help.yahoo.com/kb/vi78.html 

Gmail

You can quickly export your Gmail Contacts list into a CSV file. Here’s how:

1. Sign in to Gmail.
2. Click Gmail at the top-left corner of your Gmail page, then choose Contacts.
3. From the More drop-down menu, select Export….
4. Choose whether to export all contacts or only one group.
5. Select the format in which you’d like to export your contacts’ information. Please note, some of these formats can lose some contact information.
   • To transfer contacts between Google accounts, use the Google CSV format. This is the recommended way to back up your Google Contacts.
   • To transfer contacts to Outlook, Yahoo! Mail, Hotmail, or various other apps, use the Outlook CSV format.
   • To transfer contacts to Apple Address Book, use the vCard format.
6. Click Export.
7. Choose Save to Disk then click OK.

Hotmail

For Internet Explorer:

1. Sign in to your Hotmail account.
2. Click the ‘Contacts’ tab.
3. Click ‘Print view.’
4. Align the cursor with the first letter of the ‘Name’ column.
5. Highlight your contacts by holding down the cursor and dragging it down the list.
6. Hold down the ‘Control + c’ keys to copy the list.
7. Open Microsoft Excel (or a similar spreadsheet program that supports comma separated values).
8. Select cell A1 in Excel (the top square on the left side).
9. Hold down the ‘Control + v’ keys to paste (don’t use ‘Paste Special’).
10. Choose ‘Save as’ from the ‘File’ menu, and select the type ‘CSV (Comma delimited).’ Make a note of where you saved the file.

For Firefox:

1. Sign in to your Hotmail account.
2. Click the ‘Contacts’ tab.
3. Click ‘Print view.’
4. Align the cursor with the first letter of the ‘Name’ column.
5. Highlight your contacts by holding down the cursor and dragging it down the list.
6. Hold down the ‘Control + c’ keys to copy the list.
7. Open Microsoft Excel (or a similar spreadsheet program that supports comma separated values).
8. Select cell A1 in Excel (the top square on the left side).
9. Right click in cell A1 and select ‘Paste Special.’
10. Select ‘Text,’ and click ‘OK.’
11. Choose ‘Save as’ from the ‘File’ menu, and select the type ‘CSV (Comma delimited).’ Make a note of where you saved the file.

Hotmail Live

1. Sign in to your Hotmail account.
2. Click the Contacts list on the bottom left of the page.
3. Click the Manage drop-down menu at the top of the Contacts list and select Export.
4. On the page that appears, click the Export Contacts button.
5. When you’re prompted to open or save the file, click Save.
6. Select a location to save the file, and click Save.

Microsoft Outlook and Outlook Express

Here are some general directions to follow, though instructions may vary by version. For more detailed instructions, open ‘Help’ in Outlook or Outlook Express and type ‘export’ in the search box. Look for topics that include ‘export wizard,’ ‘export information,’ ‘exporting contacts’ or ‘exporting address book contacts’ in the title.
From Outlook:

1. Select File > Import/Export > Export from the main menu
2. Choose Comma Separated Values (Windows) > Select Contacts > Save exported file

From Outlook Express:

1. Select File > Export > Address Book from the main menu.
2. Select Text File (Comma Separated Values).
3. Click Export.

Orkut

Log in to orkut, then click ‘Friends’ along the top navigation. Next, click ‘Download your contacts’ on the bottom of the page to save your contacts as a CSV file.

AOL

1. In the left panel, click Contacts.
2. Above your list of contacts, click the Action drop-down menu (the gear-shaped icon) and then click Export.
3. Where will you be importing your contacts (Gmail, Outlook, Thunderbird, Mac AddressBook etc.)? Take a quick look in the Help for that application to figure out which format to use for the contacts file you’re creating here (CSV, TXT or LDIF). Then select the File Type by clicking the radio button next to it, and click Export.
4. When you click Export, a file called “contacts.csv”, “contacts.txt” or “contacts.ldif” is downloaded to your computer depending on the format you selected.

Others

Refer to your service or client help section for information on how to export your address book. If you have trouble uploading a file in to Gmail, you may need to open the file in Excel, alter the columns and/or headers, and then save the file as .csv.