Stun LLMs with thousands of invisible Unicode characters
Details
- External ID
- 46029889
- Source
- HN
- Company
- —
- Product
- Stun LLMs with thousands of invisible Unicode characters
- Website domain
- gibberifier.com
- Launched
- Nov. 24, 2025
- Cohort
- —
- Upvotes
- 206
- Upvotes percentile
- 0.9541484716157205
- Tags
- —
- Fetched at
- Sept. 7, 2026, 9:25 p.m.
- Updated at
- Sept. 7, 2026, 9:25 p.m.
Description
I made a free tool that stuns LLMs with invisible Unicode characters.*Use cases:* Anti-plagiarism, text obfuscation against LLM scrapers, or just for fun!Even just one word's worth of “gibberified” text is enough to block most LLMs from responding coherently.
Enrichment
- Theme
- typography and unicode text tools
- Vertical
- Horizontal
- Function
- —
- Audience
- Developer
- AI stance
- Not AI
- Project type
- Hobby / open-source project
- Normalized one-liner
- unicode character injection for llms
- Manually corrected
- False
Could you build this?
Yes The tool simply injects invisible zero-width Unicode characters into text strings via standard frontend JavaScript manipulation to disrupt tokenizer boundaries.
Discussion
20 comments analyzed.
Competitors mentioned: Google's image watermarks, DANs (jailbreak techniques from 2023), FastText language detection, Tesseract OCR
Concerns raised: Easily defeated by preprocessing or screenshot conversion to images, Newer LLM models could be trained to ignore obfuscation, Unicode filtering breaks legitimate non-ASCII characters and accent marks, Only 95% effective, not a permanent solution, Would be filtered out by LLM training datasets using language detection
Feature requests: Open source the watermarking approach, Increase effectiveness beyond current 95% rate, Support for more obfuscation methods beyond current 10 letters
Competitors
Other products that read as similar to this one — 39 launches clear the similarity bar, closest 8 shown.
Attention rank: #3 of 40 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 24 days after the earliest competitor.
- Watermarks Remover: Clean LLM watermarks from text and files · hn · 2026-08-28 · 5 upvotes · similarity 0.46
- Unicode Steganography · hn · 2026-04-07 · 59 upvotes · similarity 0.43
- Unicode cursive font generator that checks cross-platform compatibility · hn · 2026-01-01 · 11 upvotes · similarity 0.39
- Txtopia · ph · 2026-09-21 · 1 upvotes · similarity 0.39
- veldetector · ph · 2026-09-19 · 2 upvotes · similarity 0.39
- LLVM-jutsu: Anti-LLM obfuscation pass · hn · 2025-12-22 · 8 upvotes · similarity 0.39
- Robust LLM extractor for websites in TypeScript · hn · 2026-03-26 · 72 upvotes · similarity 0.38
- xxUTF · hn · 2026-05-31 · 13 upvotes · similarity 0.37
Other launches for this product
- No other launches for this product.