Find malformed addresses, duplicates, disposable domains and role addresses in your CSV. Your file stays on your device.
Choose a CSV, select the email column, and process up to 20,000 rows locally. Download all findings or only the rows that pass your selected cleanup rules.
Quoted commas, header rows and additional contact fields are preserved. Result columns explain each classification. Exported cells are protected against spreadsheet formula execution.
Invalid syntax, duplicates and blocklist matches are separated. Role accounts are retained unless you explicitly exclude them. Unsupported syntax is sent to review.
Local cleanup does not detect mailbox existence, spam traps, catch-all behavior or current inbox placement. Passing cleanup is not a deliverability guarantee.
No. The CSV is read and processed in the browser. The public disposable-domain snapshot is downloaded to your device.
You decide. Shared addresses like support@ can be legitimate. The default is to flag them without removing them.
CSV files up to 5 MB and 20,000 rows. Select the column containing email addresses after loading the file.