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Wallesai - Chrome Extension

A sidebar AI assistant that translates, summarizes YouTube videos, and chats with PDFs using GPT-4.

Checked 3 Oct 2026 Reviewed by Alex Listed since September 2024

Screenshot of Wallesai - Chrome Extension

At a glance

Starts at Free Listed as free on the Chrome Web Store.
Free tier Yes
Platforms Chrome
Best for Researchers and students summarizing videos and PDFs
Not for Users wanting every feature with no in-app purchases

4.5 out of 5

Scored by Alex after real use

Our verdict

Walles.AI puts a GPT-4-powered sidebar on every website, translating or explaining selected text, summarizing YouTube videos into quick outlines, and chatting with uploaded PDFs. It's built for students and researchers who want to process video and document content faster rather than watch or read everything in full. In-app purchases are offered, so some capability likely sits behind a paid tier, and it runs only as a Chrome extension with exports tied specifically to Notion.

✓What it does well

Sidebar AI chatOpens a sidebar to chat with GPT-4 or GPT-3.5 about anything.
Immersive translationTranslates, explains, or paraphrases any selected text on a webpage.
YouTube summariesGenerates video summary outlines without watching the full video.

✕Where it falls short

In-app purchases existIn-app purchases are offered, so some capability likely sits behind a paid tier beyond free use.
Chrome onlyRuns only as a Chrome extension, with no separate mobile app.
Notion-specific exportExporting saved chats works with Notion specifically, without mention of other note apps.

Key features

Sidebar AI chatOpens a sidebar to chat with GPT-4 or GPT-3.5 about anything.
Immersive translationTranslates, explains, or paraphrases any selected text on a webpage.
YouTube summariesGenerates video summary outlines without watching the full video.
PDF chat and exportSummarizes uploaded PDFs and exports chats and memos to Notion.

Questions about Wallesai - Chrome Extension

What does Wallesai - Chrome Extension do?

Wallesai puts a GPT-4-powered sidebar on every website. It translates, explains or paraphrases selected text, summarizes YouTube videos into quick outlines, and chats with uploaded PDFs, with chats and memos exportable to Notion. The sidebar can also chat with GPT-4 or GPT-3.5 about anything.

Is Wallesai - Chrome Extension free?

Wallesai is listed as free on the Chrome Web Store, with a Free plan at $0. In-app purchases are offered, though, so the reviewer expects some capability to sit behind a paid tier beyond free use. Users wanting every feature with no in-app purchases are told to look elsewhere.

Can Wallesai - Chrome Extension summarize YouTube videos?

Yes. Wallesai generates video summary outlines so users can get the key points without watching the full video. It is built for students and researchers who want to process video and document content faster, and it can also summarize uploaded PDFs.

What are the limitations of Wallesai - Chrome Extension?

Wallesai runs only as a Chrome extension, with no separate mobile app. Exporting saved chats works with Notion specifically, with no mention of other note apps, and the reviewer notes that in-app purchases suggest some capability sits behind a paid tier.

How does Toolio rate Wallesai - Chrome Extension?

Alex scored Wallesai 4.5 out of 5 after real use, on 3 Oct 2026, and Toolio suggests it for researchers and students summarizing videos and PDFs. Toolio lists Justi18n and Textcraft AI Assistant among its alternatives.