Can't Upload GCLID Conversions – "No Header Row Found" Error Despite Correct Format

[Nathan Merry]

Hi all,

I'm trying to upload offline conversions to Google Ads using the GCLID-based method, but I keep getting the same error:

"No header row found in this sheet."

Here’s what I’ve already tried and confirmed:

• The file is in .csv format, saved as UTF-8 (no BOM)

• The first row has the exact headers:
  Google Click ID,Conversion Name,Conversion Time,Conversion Value

• There are no extra rows above the header

• I’ve removed any Parameters:TimeZone=+0100 lines

• No merged cells, formulas, or formatting

• I’ve tested uploads using both the Google Ads UI and CSVs exported directly from Google Sheets

Still, Google Ads fails to detect the header row and refuses the upload.

Has anyone run into this issue and solved it? Is there something hidden I might be missing, or could this be a bug?

Any help would be massively appreciated. I can share a sample file if needed.

Thanks!

Privacy Policy

This email and the information it contains is confidential and may be legally privileged and intended solely for the use of the individual or entity to whom it is addressed. If you have received this email in error please notify me immediately. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the company. You should not copy it for any purpose, or disclose its contents to any other person. Internet communications are not secure and, therefore, the Company does not accept legal responsibility for the contents of this message as it has been transmitted over a public network. If you suspect the message may have been intercepted or amended please notify me. Finally, the recipient should check this email and any attachments for the presence of viruses. the Company accepts no liability for any damage caused by any virus transmitted by this email. Thank you.

[Google Ads Scripts Forum Advisor]

Hi,

Thank you for reaching out to the Google Ads Scripts Support team.

In order to assist you further, could you please provide us with the following details:

• Google Ads account ID/CID
• Name of the script.
• If the script uses a spreadsheet, refer to the shareable link on how to share the spreadsheet publicly.

You can share the requested details via Reply privately to the author option or a direct private reply to this email.

Thanks,
 

Google Ads Scripts Team

Feedback
How was our support today?

               
[2025-06-19 12:32:29Z GMT] This message is in relation to case "ref:!00D1U01174p.!500Ht01rfl3d:ref" (ADR-00314945)