# Kith

> Kith is a browser extension that explains dense text and visuals *in context* on whatever page you are already reading. Public site: https://kithext.com (domain: **kithext.com**).

## One-line definition

**Kith** = Chromium extension + Kith backend that returns contextual explanations for (1) highlighted text and (2) user-framed image regions, with an optional private archive of saved explanations.

## Who it is for

Professionals and serious readers who hit friction on dense material: legal and policy language, medical and scientific papers, engineering drawings and schematics, software and API documentation, financial charts and research PDFs—without constantly opening side tabs or chat apps.

## Problems addressed (discovery keywords)

- “Explain this phrase on the page I’m reading” without losing place in the document.
- “What does this part of the diagram or chart mean?” from a marked region.
- “Save this explanation and find it later” tied to source context (Archive).

## Core capabilities

- **Text explanations**: Select text; Kith uses page title, URL, headings, and nearby text as context and returns a structured explanation in an overlay card.
- **Visual analysis**: Mark a rectangle on charts, diagrams, UIs, scans; Kith sends the region plus page metadata for a contextual breakdown (subject to plan limits and image size caps described on Trust / product pages).
- **Private Archive**: Save notable explanations; search and sort from the extension options / archive surfaces as product evolves.

## Model and privacy posture (high level)

- Model calls are mediated by the **Kith backend** (the extension does not hold provider API keys or call cloud models directly).
- Only the selected text or image region plus limited page context is sent for analysis, as described in Trust and Privacy pages.
- Account state, quotas, and billing visibility are shown on the web account experience where applicable.

## Commercial model

- **Free trial** (time-limited; no credit card required to start in the marketed flow).
- **Starter** and **Pro** paid tiers with higher daily text and vision limits; annual billing where offered.
- Exact prices and limits: **https://kithext.com/pricing.html**

## Official URLs (canonical)

| Page | URL |
|------|-----|
| Home | https://kithext.com/ |
| About / use cases | https://kithext.com/about.html |
| Pricing | https://kithext.com/pricing.html |
| Trust & security | https://kithext.com/trust.html |
| Privacy | https://kithext.com/privacy.html |
| Terms | https://kithext.com/terms.html |
| Contact | https://kithext.com/contact.html |
| Account / access | https://kithext.com/account.html |
| Try / onboarding page | https://kithext.com/try.html |

## Machine-readable companion

- **ai.txt** (compact fact sheet for agents): https://kithext.com/ai.txt

## Languages

Marketing site available in English, Spanish, French, German, and Chinese (Simplified) under `/es/`, `/fr/`, `/de/`, `/zh/` where pages are published.

## Extension distribution

Chromium-based browsers (Chrome, Edge, Brave). Install flow is linked from the homepage and account surfaces; Chrome Web Store listing when published.

## Retrieval synonyms

Kith; kithext; Kith extension; contextual explanation extension; in-page AI explanation; explain highlight Chrome; diagram explainer extension; reading copilot; knowledge layer for the browser; archive of explained concepts.

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*This file follows the llms.txt convention for LLM-friendly site summaries. Last updated to reflect product positioning; pricing and limits may change—always prefer /pricing.html for current numbers.*