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Instant Multilingual PDFh Chrome Extension

Defines any word on a PDF, webpage or local document in two clicks.

Checked 4 Oct 2026 Reviewed by Alex Listed since October 2024

Screenshot of Instant Multilingual PDFh Chrome Extension

At a glance

Starts at Free No paid plan found on the Chrome Web Store, September 2026.
Free tier Yes
Platforms Chrome
Best for Multilingual readers who look up words across many documents
Not for Anyone needing definitions on protected or scanned documents

5.0 out of 5

Scored by Alex after real use

Our verdict

This extension gives you a definition for any selected word or phrase on a webpage, PDF or local text file in two clicks, falling back to a popup window when a tooltip can't display, such as in Chrome's built-in PDF viewer. ChatGPT is available as a definition source across more than 30 languages, alongside customizable shortcuts and a web search link for more context. Protected or scanned documents aren't supported, and using it on local files requires manually enabling file-URL access in Chrome's extension settings.

✓What it does well

Two-click definitionsAny selected word or phrase gets a definition in just two clicks.
Works across formatsDefinitions work on webpages, PDFs and local text files alike.
Multilingual ChatGPT lookupsChatGPT can supply definitions across more than 30 supported languages.

✕Where it falls short

Scanned PDFs unsupportedProtected or scanned documents are not supported for definitions.
Local file setup neededUsing it on local files requires manually enabling file-URL access first.
ChatGPT backup needs its own accountThe ChatGPT definition source requires registering separately at chatgpt.com if you use it.

Key features

Two-click word definitionsSelect a word and get its definition in two clicks or a shortcut.
PDF popup fallbackA popup window shows definitions automatically when PDF tooltips can't display.
ChatGPT definition sourceChatGPT can be set as the definition provider across 30-plus languages.
Search historyPast word lookups are saved and can be revisited later.

Questions about Instant Multilingual PDFh Chrome Extension

What does Instant Multilingual PDFh Chrome Extension do?

Instant Multilingual PDFh Chrome Extension defines any selected word or phrase on a webpage, PDF or local text file in two clicks or with a shortcut. When a tooltip cannot display, such as in Chrome's built-in PDF viewer, it shows the definition in a popup window instead. It also adds a web search link for more context.

Is Instant Multilingual PDFh Chrome Extension free?

Yes. Instant Multilingual PDFh Chrome Extension is free, and Toolio found no paid plan on the Chrome Web Store in September 2026. The one catch is that the optional ChatGPT definition source requires registering a separate ChatGPT account.

Can Instant Multilingual PDFh Chrome Extension define words in other languages?

Yes. ChatGPT can be set as the definition source in Instant Multilingual PDFh Chrome Extension, covering more than 30 languages, though it needs a separate ChatGPT account. Toolio names multilingual readers who look up words across many documents as the best fit.

Does Instant Multilingual PDFh Chrome Extension work on scanned PDFs?

No. Protected or scanned documents are not supported, and Toolio says the extension is not for anyone needing definitions on them. It does work on local text files, but only after file-URL access is manually enabled in Chrome's extension settings.

How does Toolio score Instant Multilingual PDFh Chrome Extension?

Alex gave Instant Multilingual PDFh Chrome Extension a 5.0 out of 5 after real use, on 4 Oct 2026. The reviewer highlights two-click definitions, support for webpages, PDFs and local files, and multilingual ChatGPT lookups. Past lookups are also saved in a search history to revisit later.

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