IDN Safe is a free browser extension for Chrome that aims to protect users from visiting fake websites by blocking internationalized domain names (IDNs), also known as punycode domains. These domains use Unicode characters that can potentially be used to spoof legitimate websites, making it difficult for users to distinguish between real and fake sites.

By blocking IDNs, IDN Safe helps users identify and avoid visiting probable fake sites. The extension works by preventing the display of IDNs in the browser, ensuring that users are not tricked into thinking they are accessing a legitimate website when they are actually being directed to a malicious one.

IDN Safe provides users with the option to temporarily allow specific domains or whitelist them permanently. By default, all IDNs are blocked to ensure maximum protection for users.