Laravel Development Ready to use
Mail Header Injection Checklist
Paste user input usage to flag header sanitization gaps in from and replyTo values.
How to use
- 1Open the Mail Header Injection Checklist tool page.
- 2Enter or paste your input into the provided fields.
- 3The tool processes your input instantly in your browser.
- 4Copy or download the result using the buttons provided.
Privacy & limitations
- Processing happens locally in your browser — nothing is uploaded.
- Works on modern desktop and mobile browsers.
- Very large inputs may take a moment; the interface will show progress.
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