# Omna — Mask PII & Kill the Token Tax Before AI Sees It

> Free local-first Mac app that masks PII and slices massive files before sending to Claude, ChatGPT, Gemini, Perplexity or DeepSeek.

Canonical: https://omna.dev/

## What Omna is

Omna is the semantic layer between your data and AI. Two surfaces share one Rust kernel:

- **Omna for Mac** — a free menu-bar capsule that masks PII and slices large files locally before you paste them into Claude, ChatGPT, Gemini, Perplexity, or DeepSeek.
- **Omna for Python** — a Polars/pandas plugin for local semantic search and PII masking. `pip install omna`.

## Why it exists

LLM providers charge by token. Sending raw files means paying the "Token Tax" — paying to send PII, boilerplate, and irrelevant context to a remote model. Omna strips PII and slices files on-device before the request leaves your machine.

## Key properties

- Zero data egress. PII detection and tokenization run on-device (Rust + WebAssembly).
- No API keys, no accounts required for the local features.
- Compatible with Claude, ChatGPT, Gemini, Perplexity, DeepSeek.
- HIPAA- and GDPR-friendly by design — data never leaves the host.

## Links

- Python library: https://omna.dev/library
- Mask PII before LLMs: https://omna.dev/mask-pii-before-llm
- Polars semantic search: https://omna.dev/polars-semantic-search
- Help docs: https://omna.dev/help
- Privacy policy: https://omna.dev/privacy