Once a piece of writing is published online, the author often loses control over where it goes.
A person may open the page, read it, save it or share it. At the same time, an automated scraper may copy the same text and add it to a large dataset, possibly without the writer’s knowledge or permission.
ShieldFont, a newly released open-source font tool, is designed to give publishers another way to push back.
The idea is simple: people see the original text, while scraping software may collect a different version.
ShieldFont uses a font feature known as glyph substitution. The words shown on screen can look exactly as the author intended, but the text stored in the page’s source code may contain altered nouns, verbs or adjectives.
A sentence such as “The reporter investigated the company” could still appear normally to a reader. A scraper, however, might collect a version with key words replaced. The sentence may remain grammatically correct, but its meaning could be wrong.
That matters because AI systems depend on large amounts of clean and accurate text. If scraped content becomes unreliable, it may be filtered out or become less useful for training.
ShieldFont is not a perfect lock. A determined scraper could inspect the font file, study the replacement rules or use screenshots and optical character recognition to recover the visible text. The tool may also create problems for search engines and screen readers.
The developers do not present it as a complete solution. It is better understood as a speed bump — something that makes large-scale, low-cost scraping more difficult.
The project is mainly built for English-language content, so support for Chinese and other writing systems remains limited.
Its wider impact is still unclear, but the idea speaks to a growing concern among writers, journalists and publishers: putting work online does not automatically mean giving permission for it to be used in AI training.
ShieldFont’s message is straightforward. If the rules cannot protect creators yet, technology may at least help them make unauthorized scraping more costly.
