Doodo for Chrome
Your AI teacher, on every page you study
Select a line on GeeksforGeeks, Wikipedia or your course notes and Doodo explains it out loud. It underlines the exact words on the page, draws the idea in its notebook beside it, and checks you got it.
Deadlock
A deadlock happens when each process holds a resource and waits for one held by another. It needs four conditions at the same time: mutual exclusion, hold and wait, no preemption and circular wait.
all 4 at once → break one!“P1 holds R2 and wants R1; P2 holds R1 and wants R2. Neither can move — that loop is circular wait.”
How it works
Select, or circle
Select a sentence and click Explain — or Why?, Example or Simpler. For a diagram, equation or code, circle it with Doodo's pen.
Doodo looks at the page
It reads the part you asked about and what's around it, so the explanation starts from your page, not from a generic answer.
It teaches on the page
While it talks, Doodo scrolls to the right place and underlines, highlights and circles the words it's explaining, with short notes in the margin.
And draws in its notebook
The new idea — a diagram, a worked example, a timeline — appears in the side panel as Doodo speaks, one step at a time.
Then checks you understood
A quick question that waits for your answer, so you find the gap now and not in the exam.
Everything Doodo does on the website, wherever you read
Explain any line
Select text and click Explain, Why?, Example or Simpler. Or press Alt+Shift+E, or right-click → Explain with Doodo.
Draw to ask
Circle a graph, a circuit, an equation or a block of code and ask about it — Alt+Shift+C, or “circle anything” in the panel.
Marks the page itself
Doodo points at what's already on the page — the exact phrase, the right step — instead of making you match its words to yours.
Explain this page
Right-click any article for a guided walk through its main ideas, section by section, with the page marked as Doodo goes.
Talks while it draws
The same voice and notebook as doodo.guru, with check-in questions that wait for you. Pause, interrupt or ask a follow-up anytime.
Remembers what you studied
Every lesson is saved to your Boards under the page's title, and what you learn updates your Doodo memory.
It reads a page only when you ask
Doodo looks at a page when you ask about it — never in the background, and never to record where you go. It stays off on banking, payment, email, messaging and government-ID sites, and it never reads form fields or passwords. If you close the Explain button a few times on a site, it stays quiet there.
What it keeps is the lesson: the page's address and title, your question and the short quotes it marked. Not whole pages, not screenshots, not your history. You can delete any board, or your whole account, from Settings. The details are in our privacy policy.
Questions people ask
Is Doodo for Chrome free?
Yes. It uses your free Doodo account. There is a generous daily limit — 60 lessons a day from the extension — so the service stays fast for everyone, and a lesson is never cut off in the middle.
Does Doodo read every page I visit?
No. Doodo reads a page only when you ask about it — when you click Explain on a selection, ask in the Doodo panel, circle something, or ask it to explain the page. It never records your browsing history and never stores whole pages. It stays off on banking, payment, email, messaging and government-ID sites, and never reads form fields or passwords.
Why does it ask to work on all sites?
So the Explain button can appear when you select text, and so Doodo can draw on whichever page you're studying. It's optional: say no, and Doodo still works on any tab after you click its toolbar icon.
Which pages does it work on?
Ordinary web pages: articles, tutorials, documentation, Wikipedia, GeeksforGeeks, Medium, course sites and online textbooks. Chrome doesn't let extensions into its own pages (chrome://, the Chrome Web Store) or its built-in PDF viewer, so Doodo can't mark those — you can still ask it questions in the panel.
Where do my lessons go?
Into the same Doodo account you use on doodo.guru. Every lesson is saved to your Boards under the page's title, and what you learn updates your memory, so Doodo on the website knows what you studied in the browser, and the other way round.
Which browsers are supported?
Google Chrome 116 or later on Windows, macOS, Linux or ChromeOS. It isn't available on phones, because Chrome on phones doesn't support extensions.
Keep exploring
Study anything on the web with a teacher beside you
Select a line, circle a diagram, and watch it explained on the page.
Create my free accountComing soon to the Chrome Web Store. Your Doodo account connects in one click.