Email List Cleaner
Trim, lowercase, dedupe and drop the bad addresses.
CSV Email Validator
Validate the email column and keep the rest of the row.
Drop your CSV here, or click to choose — it is read from your disk, never uploaded
Quick Tool Overview
The CSV Email Validator validates the email column of a spreadsheet in place, keeping every other column intact and adding the verdict, score and reason as new columns beside them.
- What it does
- Validates the email column of a CSV without losing the rest
- You give it
- A CSV file from your disk, or pasted CSV text
- You get back
- The same rows plus verdict, score and reason columns
- Delimiters
- Comma, semicolon and tab, detected automatically
- Best for
- Cleaning a customer export without scrambling the rows
About the CSV Email Validator
Real lists arrive as CSV files with a name column, a company column, a signup date and an email address somewhere in the middle. Pulling the addresses out to check them and then trying to match them back is how rows get scrambled.
This reads the whole file instead. The email column is detected automatically — or you pick it — and every row is validated in place, with the verdict, the score and the reason added as new columns beside your existing ones. Every other column comes through untouched.
Export the annotated file, or just the rows that passed, and the header row comes with it. The file is read with FileReader from your own disk, so a spreadsheet of customers is never uploaded to be checked.
Key features of the CSV Email Validator
Column auto-detected
Found from the header, and overridable if it guesses wrong.
Other columns preserved
Every field comes through in its original order.
Proper CSV parsing
Quoted fields, escaped quotes and newlines inside values all handled.
Export all or only the passes
The annotated file, or just the rows worth keeping.
Read with FileReader
The spreadsheet never leaves your machine.
How to use the CSV Email Validator
-
1
Drop your CSV
Read straight off your disk — nothing is uploaded.
-
2
Confirm the email column
Detected automatically from the header, or pick it yourself.
-
3
Review the table
Every row keeps its other columns, with the verdict added.
-
4
Export what you need
The annotated file, or only the rows that passed.
Frequently asked questions
No. It is read with the browser FileReader API from your own disk, and there is no upload endpoint on this site. A customer spreadsheet never leaves your machine.
Yes. Every column comes through in its original order, with the verdict, score and reason added as new columns at the end.
Yes. The parser understands quoted fields, escaped quotes and newlines inside a quoted value, which is where most naive CSV splitting goes wrong.
The delimiter is detected from the header row, and you can override it — semicolon and tab-separated exports both work.
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