Email address obfuscation/collection robot countermeasure code generation | ZeroTools

As a countermeasure against automatic email collection spambots, email addresses and phone numbers are converted into HTML entity references and obfuscated JavaScript code. It is a convenient web tool that operates completely locally and safely without sending data to an external server.

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Client-Side Secure Execution

This tool executes entirely in your browser sandbox. None of your input strings, files, or configurations are uploaded to any external server.

ZeroTools: Browser Processing & Privacy

Preview content containing external URLs or executable code may cause external requests. Avoid previewing confidential content or untrusted code.

Processing and privacy policy
Article Index
Chapter 1

Technical Specifications & Architecture

Represent text in another form

The tool outputs HTML character references, JavaScript code points, Base64 or ROT13. JavaScript output contains its own decoding logic, so a recipient can recover the original text. This is not encryption and must not be used to protect passwords or API keys.

The preview shows the restored text without executing the output code. JavaScript output requires a destination that permits scripts. Email links open a mail application; this tool does not send messages.

Code-point and Base64 modes handle Japanese text and emoji. ROT13 changes only Latin letters. Test the result where you intend to embed it, because HTML and JavaScript interpretation depends on the destination.

Frequently Asked Questions (FAQ)

A.
No. Base64 and character-code representations can be reversed. Do not use them to protect passwords or API keys.
A.
No. It displays the restored text. Copied code runs according to the destination’s HTML and JavaScript settings.

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