Process files up to the browser memory limit.

Can I filter to only invalid emails?

Yes — toggle to show only invalid rows for easy cleanup.

Email Validator

Validate and flag invalid email addresses in a CSV column. Syntax and domain checks. The safest way to process sensitive data

Your files never leave your device. Processed locally. 100% private.

Unlocking Tool Engine...

Complete your task perfectly in just three straightforward steps.

Drop your CSV file containing an email column.

Choose which column holds email addresses.

Download the CSV with a new valid/invalid status column added.

Everything you need to know about the Email Validator.

What checks are performed?

Syntax validation, domain MX record existence, and disposable email detection.

Are typos caught?

Yes — common typos like gmail.con are flagged and a correction suggested.

Is my file uploaded?

No. Syntax checks run locally. Domain checks use a public DNS API.

Continue working with our suite of free data utilities.

Hide secret text inside an image using LSB steganography. Also detect and extract hidden messages. The safest way to process

Validate CSV structure, headers, data types, and required fields against a schema. Processed entirely in your browser for 100

Validate a CSV file against a JSON or YAML schema definition. Fast, private, and secure browser-based tool with no signups or

Generate contracts from CSV data using a template. Mail-merge style document creation. Securely process files in your browser

Validate and normalize phone numbers in a CSV column. International format support. Processed entirely in your browser for 10

Validate Indian PIN codes in bulk from a CSV column. Fast, private, and secure browser-based tool with no signups or software