Chrome Extension — Free

Read everything.
Understand anything.

Select any word or phrase on any page. Professor gives you instant, context-aware AI explanations — finance, law, medicine, technology, and more.

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10 free lookups per day  ·  No account required

finance.yahoo.com

The company reported strong results driven by growth in recurring revenue and an improvement in free cash flow conversion to 94% in the quarter.

Management raised full-year guidance, citing favorable macro conditions and easing supply chain constraints.

free cash flow conv…
Finance

The share of net income that converts into actual cash. A 94% rate is excellent — it means nearly all reported earnings are backed by real cash generation.

Professor
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Every field. In context.

Professor detects the domain automatically — a legal term in a contract gets a different explanation than the same word in a medical journal.

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Built for professionals
who read for a living.

Every detail is designed to stay out of your way until you need it.

Instant explanations

Select text and the explanation appears in under a second — no copying, no new tabs, no context switching.

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Domain-aware AI

Finance, law, medicine, or tech — Professor detects the context and tailors the explanation to the right field.

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Privacy-first

No account required. No text is stored. Selected text is sent only to process your explanation, then immediately discarded.

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Works everywhere

Any webpage — news, research, SEC filings, contracts, medical journals, technical docs. Even PDFs in Chrome.

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Keyboard-friendly

Trigger with a shortcut. Drag the popup anywhere. Minimize to a pill and restore instantly.

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Flashcards & notes PRO

Save any explanation as a flashcard or attach personal notes. Build a knowledge library as you read.

Three steps.
Zero friction.

1

Select any text

Highlight a word, phrase, or sentence on any webpage. A small icon appears next to your selection.

2

Click to explain

Click the icon or press the keyboard shortcut. Professor identifies the domain and generates the explanation.

3

Read and continue

The explanation appears inline — no new tab, no interruption. Close it and keep reading.

Your reading stays yours.

Professor is built for professionals who work with sensitive documents. Privacy is not a toggle — it's the architecture.

What we collect — and don't

No account required for free tier
Selected text is never stored or logged
No third-party analytics or trackers
Random device ID for rate limiting only
Built-in blocklist for banking and HR portals
One-tap local data wipe in settings

Start free.
Upgrade when you're ready.

The free tier is genuinely useful — 10 lookups per day, no account required. Pro removes all limits.

Free
$0

No account. No credit card.

  • 10 AI explanations per day
  • All 5 domain types
  • Works on any webpage
  • Privacy-first architecture
  • Flashcards & notes
  • Lookup history
  • Unlimited lookups
Lifetime
$149

Pay once. Pro forever.

  • Everything in Pro
  • All future features included
  • One-time payment
Enterprise

For teams and organizations

Custom pricing, SSO, audit logs, and policy controls for finance, law, and healthcare teams.

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Free to install. Works instantly. No account required.

Add Professor to Chrome