KATALYST

Katalyst turns any web page into a structured workspace — summarize, translate, highlight, and convert without ever leaving your tab.
The browser copilot for people who think in flow, not in tabs.

✦ AI Sidebar, Three Ways
Open your question instantly in ChatGPT, Claude, Gemini or Perplexity — or chat right inside the sidebar with your own API key, or unlock Katalyst AI for a zero-setup, context-aware assistant. Your call, every time.

✦ Smart Highlights & Annotations
Color-coded highlights with custom legends and inline notes, saved per page and waiting for you when you come back. Built for research, not just reading.

✦ Focus Pomodoro
A built-in focus timer with session tracking, so deep work and deep reading finally live in the same tab as everything else.

✦ Cross-Format Export
Turn any article into clean Markdown or plain text, generate instant APA / MLA / Wikipedia citations, or pull a chronological timeline out of a long page in one click.

✦ Instant Translation
Translate a selection or an entire page on the fly — no copy-pasting into another tool.

✦ Quick Converter
Currency, units, and time zones, solved in two clicks without opening a new tab.

Privacy & Cost — No Surprises

We built Katalyst around one rule: you should never feel locked into a subscription to use an AI tool in your browser.

Free, for real. Summaries, translation, reader mode, highlights, todos and the core toolkit work out of the box — no account, no credit card.
Pay only for what you use. Katalyst Pro has no recurring subscription. Top up credits through Stripe whenever you need more, and stop whenever you want. No auto-renewal traps.
Bring Your Own Key. Connect your own Anthropic API key for unlimited personal AI chat. Your prompts go straight to Anthropic — Katalyst never sees, stores, or routes your conversations through our servers.

Structure Accelerator. Your page, your pace, your cost.