Eric Lu, founder of Mixfont, has developed a font called Ghost Font. Eric claimed that current AI models cannot read the Ghost Font. It is a moving font created using dots that only human eyes can read. As you pause the video, it displays only dots.
It is a bold claim that made headlines as Eric Lu discovered something that people were not even looking for. I do not remember a single person who cares about whether AIs read a font or not. Yet the Ghost font is here. And it is time to review his claim.
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| Ghost Font: What is It? Why Can’t AIs Read it?: RavStation |
Ghost Font:
What is ghost font?
Ghost font is a motion font that uses dots to make the font visible for humans only. These characters move together in coherent motion. It works as flickering background dots. Even for human eyes, the Ghost Font is too noisy. It uses frames to display the font that stays in motion. You cannot expect one image.
Eric Lu’s Claim:
Eric Lu claimed that modern AI models cannot read the moving Ghost Font. He claimed that the Ghost font helps the users to keep their information private. AI models cannot read this font as it is in motion.
While it looks great, the claim suggests that AI cannot read your information in ghost font. There is more than one should know.
Reddit Claims:
Eric Lu claimed that ChatGPT 5.5 Pro spent 19 minutes reading Ghost Font and provided hallucinated results. He also claimed that the same Ghost Font can be used to create complex CAPTCHAs that AI cannot pass through.
Anjowoq on Reddit asked if it is moving. How? It is a font. Alex Murphy said that he doesn’t think that the font is for actual reading or writing.
6double claimed that Claude decoded the Ghost Font in minutes. To recover text from Ghost Font, he uploaded 188 frames.
Another user, International_Cup725, suggested that there is a similar game: https://brantagames.itch.io/motus
How to Try Ghost Font?
If you are interested in trying host fonts, then here are the steps:
- Go to https://www.mixfont.com/ghost-font
- In the “Write your message” tab, write the text you want in motion.
- You get the options to pause, invert, speed, and reset.
- You can download the message using the "Download Message” button.
Can I take a screenshot of Ghost Font?
No. Ghost font only displays an image full of dots when taking screenshots. I have already tested that theory.
Ghost Font Use Cases:
- CAPTCHAs: Rather than using puzzles, you can use Ghost Font as CAPTCHAs. While humans can read the text, AI models like ChatGPT 5.5 cannot read it. AI models will struggle to break it.
- Bot Protection: Apps and websites can use Ghost Font verification so that AI models cannot bypass the verification process.
- DRM and Watermarking: Ghost font watermarking is difficult to remove. It can be used as a watermark or copyright marker.
- Human-Only: Ghost Font is only human-readable. It can be used to protect private, complex, and sensitive information.
Conclusion:
Ghost Font is a complicated font that most humans do not find user-friendly. It is only useful in CAPTCHAs, bot protection, DRM, and watermarking. As a general font, it puts pressure on the human eye, and it needs effort to read the moving font.
The only good thing about Ghost Font is that AIs cannot read it for now. But it is possible that upcoming AI models can decode moving fonts.
