# Prompt Injection Check

> Prompt Injection Check is a browser-based, deterministic preflight scanner for text and supported documents. Analysis runs locally in the browser; documents are not uploaded for scanning.

Use this site to inspect supported content for hidden-content patterns, instruction-like signals, obfuscation and document structures that may deserve review before the content is given to an AI system.

A finding means the scanner observed a signal worth reviewing. It does not prove that a document is malicious. No finding is not a guarantee of safety.

Supported inputs include pasted text and DOCX, PDF, HTML, Markdown, TXT, JSON, CSV, TSV, XML, EML, PPTX and XLSX files.

## Product

- [Scanner](https://www.adrianrepair.eu/en/)
- [How it works](https://www.adrianrepair.eu/en/how-it-works.html)
- [What we detect & FAQ](https://www.adrianrepair.eu/en/what-we-detect.html)
- [Methodology & testing](https://www.adrianrepair.eu/en/methodology-and-testing.html)
- [Updates](https://www.adrianrepair.eu/en/updates.html)

## Learn

- [Learn](https://www.adrianrepair.eu/en/learn.html)
- [What is prompt injection?](https://www.adrianrepair.eu/en/what-is-prompt-injection.html)
- [Hidden instructions in files](https://www.adrianrepair.eu/en/hidden-instructions-in-files.html)
- [How to review findings](https://www.adrianrepair.eu/en/how-to-review-findings.html)

## Glossary

- [Glossary](https://www.adrianrepair.eu/en/glossary.html)

## Languages

- [English](https://www.adrianrepair.eu/en/)
- [Deutsch](https://www.adrianrepair.eu/de/)
- [Français](https://www.adrianrepair.eu/fr/)
- [Română](https://www.adrianrepair.eu/ro/)

## Privacy and legal

- [Privacy](https://www.adrianrepair.eu/en/datenschutz.html)
- [Legal notice](https://www.adrianrepair.eu/en/impressum.html)
- [Third-party licenses](https://www.adrianrepair.eu/en/third-party-licenses.html)

## Machine-readable resources

- [Full context](https://www.adrianrepair.eu/llms-full.txt)
- [Sitemap](https://www.adrianrepair.eu/sitemap-v85.xml)