PasteGuard Files

The first public release of PasteGuard — a privacy proxy for LLMs that masks personal data and secrets before sending to your provider.

Highlights

🔒 PII Detection — Detect and mask names, emails, phone numbers, credit cards, IBANs, IP addresses, and locations using Microsoft Presidio

🔑 Secrets Detection — Catch private keys, API keys (OpenAI, AWS, GitHub), JWT tokens, and credentials before they reach the LLM

🌍 24 Languages — Automatic language detection with support for English, German, French, Spanish, and 20 more

🐳 Prebuilt Docker Images — Zero-config deployment with language-specific images

📊 Dashboard — Real-time monitoring of protected requests

🔄 Streaming Support — Real-time unmasking as tokens arrive from the LLM

Two Privacy Modes

Mask Mode — Replace PII with placeholders like [[PERSON_1]], send to your provider, restore in response. No local infrastructure needed.

Route Mode — Send PII requests to a local LLM (Ollama, vLLM, llama.cpp), everything else to your cloud provider. Data never leaves your network.

Quick Start

:::bash
docker run --rm -p 3000:3000 ghcr.io/sgasser/pasteguard:en

Point your app to http://localhost:3000/openai/v1 instead of https://api.openai.com/v1.

Dashboard: http://localhost:3000/dashboard

European Languages

For German, Spanish, French, Italian, Dutch, Polish, Portuguese, and Romanian:

:::bash
docker run --rm -p 3000:3000 ghcr.io/sgasser/pasteguard:eu

Docker Images

Tag	Languages	Size
en / latest	English	~2.7GB
eu	English, German, Spanish, French, Italian, Dutch, Polish, Portuguese, Romanian	~12GB

Languages are auto-configured per image — no config changes needed.

Features

PII Detection

• Names, emails, phone numbers
• Credit cards, IBANs
• IP addresses, locations
• Configurable confidence threshold
• Automatic language detection

Secrets Detection

• OpenSSH and PEM private keys
• API keys: OpenAI, AWS, GitHub
• JWT tokens, Bearer tokens
• Environment variable credentials
• Configurable actions: redact, block, or route to local

Integrations

Works with any OpenAI-compatible tool: - OpenAI SDK (Python/JS) - LangChain, LlamaIndex - Cursor, Open WebUI, LibreChat

Tech Stack

• Bun — JavaScript runtime
• Hono — Web framework
• Microsoft Presidio — PII detection
• SQLite — Request logging

Documentation

📚 Full documentation: https://pasteguard.com/docs

Contributors

Thanks to everyone who contributed to this release:

• @sgasser (Stefan Gasser)
• @maximiliancw (Max Wolf)
• @mkroemer (Markus)

License

Apache 2.0

---

Full Changelog: https://github.com/sgasser/pasteguard/commits/v0.1.0