Joann
Screenshot capture with AI visual analysis, private in your browser.
About
Joann is a Chrome extension that captures screenshots and analyzes them with AI, aimed at research, competitor tracking, and learning.
Everything stays in your browser — no cloud storage of your captures — and you bring your own OpenAI API key. It supports annotations, project folders, and custom prompts for specialized analysis.
The bring-your-own-key model keeps costs transparent, but you pay OpenAI usage on top of the free extension.
What it can do
- One-click screenshot capture
- AI-powered visual analysis
- In-browser privacy (no server storage)
- Annotations and highlighting
- Project folders
- Custom AI prompts
- Copy analysis to clipboard
Setup
- Install Joann from the Chrome Web Store.
- Click the extension icon and add your OpenAI API key.
- Capture a screenshot of any page.
- Add annotations and ask the AI your question.
- Organize captures into project folders.
Prerequisites
Chrome or Chromium browser; an OpenAI API key (pay-per-use).
Use cases
Works with
Trust score — 4/10
Scored 4/10 (metrics tier, metrics-v1). Evidence: Chrome Web Store listing verified; BYOK model — no subscription lock-in; no public user counts; vision model reference is dated. License: Proprietary..
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 3.0/10
- Maintenance · recency, releases, issue load
- 4.0/10
- Openness · license + docs
- 3.0/10
- Manual review · sanity read + red-flag check
- 5.0/10
- · Chrome Web Store listing verified
- · BYOK model — no subscription lock-in
- · no public user counts
- · vision model reference is dated
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.