100% local processing (no uploads)

Meta & Google Ads CSV Formatter

Instantly clean your messy customer data. Auto-format phone numbers, emails, and headers to match Facebook and Google's strict Custom Audience templates. 100% secure, processes locally in your browser.

Emails

Trim + lowercase

Phones

Digits only → +E.164

Headers

Auto-map to Meta keys

Default Phone Country Code

Drag & drop your CSV

or click to choose a file. We never upload your data.

Local-only processing

Results

Upload a CSV to generate a clean, ad-platform-ready export.

1) Upload

Drag & drop your customer list CSV.

2) Auto-clean

Normalize emails, phones, and common header names.

3) Export

Download a ready-to-upload CSV for Meta & Google.

Frequently Asked Questions

Why is my Facebook Custom Audience CSV getting errors?

Usually, it's because phone numbers lack the country code or emails contain uppercase letters. Simply select your target country code from the dropdown, and AdCSV Formatter automatically applies Facebook's strict formatting rules to prevent upload errors.

What is the Google Customer Match phone number format?

Google requires the exact E.164 format (a '+' sign followed by the country code and number). Our tool strips spaces, dashes, and local trunk prefixes (like '0' in the UK/AUS), converting local numbers from any country into valid international E.164 formats instantly.