Email Extractor

You have a long email thread, a webpage, or a CSV dump and need to pull out every email address. Scrolling through hundreds of lines to manually find and copy each address takes forever. This tool extracts all email addresses from any text in one click — paste your content, get a clean list.

Why This Tool

Regex for email validation is notoriously complex (the RFC 5322 compliant pattern is over 6,000 characters). This tool uses a practical extraction pattern that catches real-world email addresses without false positives from surrounding text. It deduplicates, sorts, and lets you copy or download the results. Everything runs in your browser — your text never leaves your device.

How It Works

Paste any text — emails, documents, HTML source, log files, CSV data
The tool scans for patterns matching local-part@domain.tld
Duplicates are automatically removed
Results are displayed as a clean list with count
Copy all emails or download as a text file

What Counts as a Valid Email

The extractor matches addresses following standard conventions:

Local part: letters, numbers, dots, hyphens, underscores, plus signs
@ separator
Domain: letters, numbers, hyphens, dots
TLD: 2 or more letters (com, org, co.uk, etc.)

Examples of matched addresses:

user@example.com
first.last@company.co.uk
dev+tag@gmail.com
admin@sub.domain.org

Common Use Cases

Contact list building: Extract emails from business correspondence
Data migration: Pull emails from unstructured data exports
Web research: Extract contact emails from copied webpage text
Log analysis: Find email addresses in application logs
Cleaning mailing lists: Paste a messy list and get deduplicated, sorted output

Email Address Anatomy

  user.name+tag@subdomain.example.com
  \_________/ \_____________________/
   local part         domain

Local part: Identifies the mailbox. Can contain letters, numbers, ., +, -, _
@: Separator (exactly one required)
Domain: The mail server. Must have at least one dot and a valid TLD
Plus addressing: user+tag@gmail.com delivers to user@gmail.com — useful for filtering

Privacy and Security

This tool processes text entirely in your browser using JavaScript. No data is sent to any server, no text is stored, and no cookies are set. This makes it safe to use with confidential email lists and internal documents.

Frequently Asked Questions

Does this tool validate that emails actually exist? No. The tool extracts strings that match email address patterns. It does not verify whether the mailbox exists or accepts mail. For validation, you’d need an SMTP verification service.

How does it handle duplicate emails? Duplicates are automatically removed. The output list contains only unique addresses. The comparison is case-insensitive for the domain part (RFC 5321 specifies domains are case-insensitive).

Can it extract emails from HTML source code? Yes. Paste raw HTML and the tool will find email addresses in href="mailto:..." attributes, visible text, or anywhere in the markup.

What about obfuscated emails like “user [at] domain [dot] com”? The tool matches standard email format with @ and . characters. Obfuscated formats using [at] or (at) are not matched, as these are intentionally non-standard.

Is there a limit on input text size? There is no hard limit. The tool processes text in your browser, so performance depends on your device. Texts with millions of characters may take a moment to process.