What is email obfuscation?

Email obfuscation converts an email address into a format that is difficult for automated bots to parse but still renders correctly in a browser. The most common technique is replacing characters with their HTML entity equivalents (e.g. @ becomes @).

Does HTML entity obfuscation actually stop spam?

It stops most simple crawlers that look for literal "mailto:" links or "@" symbols. Sophisticated bots may decode HTML entities. Combining entity encoding with a CSS or JavaScript technique provides stronger protection.

Will the email still work when clicked?

Yes. Browsers decode HTML entities automatically, so the rendered mailto link is fully functional even though the raw HTML contains entities.

Is my email address sent to any server?

No. The conversion happens entirely in your browser. Nothing you type is transmitted anywhere.

What is the ROT13 format?

ROT13 is a simple letter substitution cipher that replaces each letter with the letter 13 positions later in the alphabet. Combined with JavaScript decoding, it hides the email from non-JavaScript bots.

Which format should I use?

For static HTML pages, use the HTML entities format. For JavaScript-enabled pages, the JavaScript-decoded format provides stronger protection. Use the data-attribute format for modern frameworks.

How do I add this to my website?

Copy the output HTML and paste it into your page source. Replace any existing plain-text mailto link with the obfuscated version.

Can bots still find my email?

No obfuscation technique is 100% effective. If privacy is critical, consider using a contact form instead of a mailto link, or a disposable email address that forwards to your real inbox.

Privacy Tools /

Email obfuscator

Convert email addresses to HTML entities or JavaScript-decoded links to deter spam bots from harvesting your address from web pages.

100% in your browser. Your email never leaves your device.

Email address

Format

How to use

Enter the email address you want to protect.
Select an obfuscation format from the dropdown.
Click Obfuscate to generate the protected HTML.
Copy the output and paste it into your webpage source to replace the plain email address.

Common use cases

Personal websites — display your contact email without it appearing in spam databases.
Business contact pages — protect support emails from harvesting bots.
Open source projects — protect maintainer emails in README files.

Also see: Tracking Pixel Detector and Strip HTML Tracking for more HTML privacy tools.

常見問題

What is email obfuscation?: Email obfuscation converts an email address into a format that is difficult for automated bots to parse but still renders correctly in a browser. The most common technique is replacing characters with their HTML entity equivalents (e.g. @ becomes @).
Does HTML entity obfuscation actually stop spam?: It stops most simple crawlers that look for literal "mailto:" links or "@" symbols. Sophisticated bots may decode HTML entities. Combining entity encoding with a CSS or JavaScript technique provides stronger protection.
Will the email still work when clicked?: Yes. Browsers decode HTML entities automatically, so the rendered mailto link is fully functional even though the raw HTML contains entities.
Is my email address sent to any server?: No. The conversion happens entirely in your browser. Nothing you type is transmitted anywhere.
What is the ROT13 format?: ROT13 is a simple letter substitution cipher that replaces each letter with the letter 13 positions later in the alphabet. Combined with JavaScript decoding, it hides the email from non-JavaScript bots.
Which format should I use?: For static HTML pages, use the HTML entities format. For JavaScript-enabled pages, the JavaScript-decoded format provides stronger protection. Use the data-attribute format for modern frameworks.
How do I add this to my website?: Copy the output HTML and paste it into your page source. Replace any existing plain-text mailto link with the obfuscated version.
Can bots still find my email?: No obfuscation technique is 100% effective. If privacy is critical, consider using a contact form instead of a mailto link, or a disposable email address that forwards to your real inbox.

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