Tools & releasesImpact: Medium
Oleksandr Kuzmenko, EditorPublished 2 min readAI-assisted · editor-reviewed
TL;DR
- ShieldFont randomizes font Unicode mappings to protect web content against automated scrapers.
- Scrapers attempting DOM node string extraction receive garbled text outputs.
- Combines easily with existing CSS and custom font loading workflows.
Key facts
- Protection Method
- Unicode Glyph Mapping Obfuscation
- Target Threat
- Automated LLM Scrapers & DOM Extractors
Anti-Scraping Font Obfuscation
ShieldFont protects browser-rendered text by randomizing font character maps while retaining human legibility on web pages.
Implementation Overview
By generating custom web fonts with shuffled glyph assignments, applications serve obfuscated DOM strings that appear fully rendered to visual site visitors but remain unparseable to standard automated AI scrapers.
Try it in 2 minutes
css
@font-face {
font-family: 'ShieldFont';
src: url('path/to/shieldfont-obfuscated.woff2') format('woff2');
}When to use
- Ideal for protecting proprietary web articles, pricing tables, or dataset previews from text mining.
- Useful for lightweight anti-scraping enforcement without requiring heavy CAPTCHA challenges.
When NOT to use
- Not recommended for accessibility-critical web pages where screen readers require clean DOM text.
- Inadequate as a standalone defense against high-resolution visual OCR scrapers.
What to do today
- Evaluate ShieldFont for obfuscating public-facing proprietary text snippets.
- Combine font obfuscation with rate-limiting and anti-bot headers for layered defense.
Step names are taken from What to do today.
Step names are taken from What to do today. Evaluate ShieldFont for obfuscating public-facing proprietary text snippets.. Combine font obfuscation with rate-limiting and anti-bot headers for layered defense.
- Evaluate ShieldFont for obfuscating public-facing proprietary text snippets.
- Combine font obfuscation with rate-limiting and anti-bot headers for layered defense.
#ShieldFont