CSV CHECK

Check Klaviyo Profile or List CSV Import Errors

Check Email, Phone Number, ID, and consent fields before importing profiles or lists.

Check CSV

＋Choose a CSV fileTap or click to choose. Drag & drop also works on desktop.

🔒 Analysis runs in your browser. The CSV file itself is not uploaded to BlueprintLab.

What this tool checks

Checks CSV / 50 MB requirements, headers, Email or Phone Number on every row, invalid emails, and duplicate identifiers.

How to use this tool

Check identifiers, duplicates and the 50 MB limit before list import.

Use Try sample to inspect the included sample.
Set ＋ Choose a CSV file Tap or click to choose. Drag & drop also works on desktop..
Use Check CSV to process the input.
Compare the result with your source data and return to the input to make corrections.

＋ Choose a CSV file Tap or click to choose. Drag & drop also works on desktop.: .csv,text/csv

Input and settings example

Email,First Name,Last Name,Phone Number
[email protected],John,Smith,+12025550123