Papiral
PixelForge
Tabular
TabularCSV Cleaner for Klaviyo Import
Clean your subscriber list before every Klaviyo import — no errors, no bounces.
Klaviyo's list import is strict: duplicate profiles, blank rows, and inconsistent email formatting all cause silent import failures or inflate your contact counts. Tabular preps your CSV in seconds so Klaviyo accepts it cleanly — no manual spreadsheet work needed.
Common Klaviyo CSV problems
These are the formatting issues that most often break Klaviyo imports — and the ones Tabular is built to fix.
- Duplicate email addresses inflating subscriber counts and skewing metrics
- Blank rows that Klaviyo imports as empty profiles
- Inconsistent first/last name casing showing up in personalized campaigns
- Extra whitespace in email or phone fields breaking profile matching
- Mismatched column names that don't map to Klaviyo's profile properties
Recommended tools for Klaviyo
Each tool works directly in your browser — no download, no signup required.
Remove Duplicates
ProInstantly remove duplicate rows from any CSV or spreadsheet. Keep your data clean and analysis-ready.
Trim Whitespace
Strip leading and trailing spaces from every cell in your CSV or spreadsheet with one click.
Normalize Casing
ProConvert text in your CSV to UPPERCASE, lowercase, or Title Case — across all cells or specific columns.
Remove Empty Rows
Clean up blank rows from CSV and Excel files automatically. Get a compact, analysis-ready dataset.
Frequently asked questions
What CSV format does Klaviyo require for list import?
Klaviyo requires a CSV with at least an 'Email' column. Additional columns like 'First Name', 'Last Name', and 'Phone Number' are automatically mapped to Klaviyo profile properties. Column headers must match Klaviyo's expected property names — use Tabular to rename any headers that don't match.
How do I remove duplicate emails from a CSV before importing to Klaviyo?
Upload your CSV to Tabular and use the Remove Duplicate Rows tool. Select the email column as the deduplication key and Tabular will keep the first occurrence of each email and remove all others — preventing duplicate Klaviyo profiles.
Why does Klaviyo show more profiles than expected after a CSV import?
Klaviyo creates a new profile for every row in your CSV, including near-duplicate emails and rows with extra whitespace. Use Tabular to remove duplicates and trim whitespace before importing to ensure your profile count stays accurate.
Can I use Tabular to clean a Klaviyo export before re-importing?
Yes. Klaviyo's exported CSVs often contain blank rows and inconsistent formatting. Run your export through Tabular to remove empty rows, trim whitespace, and normalize name casing before re-importing or merging lists.
Is Tabular free to use for Klaviyo list cleanup?
Yes. Trim Whitespace and Remove Empty Rows are free with no account required. Remove Duplicate Rows and Normalize Casing require a Pro plan.
Ready to clean your Klaviyo CSV?
No account needed. Files are auto-deleted within 24 hours.
Start cleaning free