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How to make Chrome read a PDF aloud

The one setting that makes it work, the method for any read-aloud extension, and a 30-second check that you remember what you heard.

October 19, 2026Updated October 21, 2026 4 min read Hearald can read this page to you
In this guide
  1. What Chrome can and can’t do on its own
  2. The general method (any read-aloud extension)
  3. Do it in Hearald
  4. Where people get it wrong
  5. Recall check
  6. Try it

Chrome has no built-in button that reads a PDF out loud on a computer. You add a free read-aloud extension, give it permission to open saved files once, and then any PDF in a Chrome tab becomes something you can listen to while the words highlight on screen.

Below is the general way to do it with any extension, then the same thing in Hearald, which adds a step most readers skip: checking whether you remember what you just heard.

What Chrome can and can’t do on its own

Chrome’s own Reading mode and “Listen to this page” work on web articles, and the Android app can read some pages aloud, but neither one handles a PDF you’ve opened on a laptop. Checked October 2026 on Chrome for Windows and Mac. If you’re on Microsoft Edge instead, Edge’s PDF viewer has a Read aloud button in the toolbar and you don’t need anything else.

So on Chrome the answer is an extension. Here’s the method that works with any of them.

The general method (any read-aloud extension)

  1. Open the Chrome Web Store and add a read-aloud extension. Free options with good reputations include Read Aloud (the orange megaphone icon), NaturalReader’s free tier, and Hearald.
  2. If the PDF is a file saved on your computer rather than one on a website, go to chrome://extensions, click Details under the extension, and turn on Allow access to file URLs. Chrome blocks extensions from local files until you do this. You only do it once.
    chrome://extensions
    Your read-aloud extension
    Site accessOn click ▾
    Allow in Incognito
    Allow access to file URLs
    The last switch on the Details page. Chrome leaves it off for every extension until you turn it on.
  3. Open the PDF in a Chrome tab. Drag the file onto Chrome, or right-click it and choose Open with → Google Chrome.
  4. Click the extension’s icon in the toolbar and press play. Most let you pick a voice and speed from the same menu.

Do it in Hearald

  1. Add Hearald from the Chrome Web Store. It’s free.
  2. For saved files, do the one-time Allow access to file URLs step above.
  3. Open the PDF in a tab and click the Hearald icon.
  4. Press play. Hearald uses a voice that runs on your own computer, so nothing in the PDF is sent anywhere, and it works offline. Each word is highlighted as it’s spoken, which is what keeps your eyes on the page instead of drifting.

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    What you’ll see on the PDF: the sentence glows, the spoken word lights up, and each mark on the bar is a section you can jump to.
  5. When you finish a section, pause and write down what you remember in Hearald’s note. The check then lists the section’s key points and shows which ones your note missed. That last part is the difference between hearing a chapter and knowing it. The note and the check are part of the Study Kit, and your first three notes are free to try.
  1. 1. Open the PDFAny PDF in a Chrome tab
  2. 2. Allow file accessOnce, for saved PDFs only
  3. 3. Click HearaldToolbar icon, then play
  4. 4. Listen and followWords highlight as spoken
  5. 5. Note and checkWrite it, see what you missed
Start at step 2. It’s the one step every “it doesn’t work” complaint comes down to.

Where people get it wrong

The most common mistake is installing an extension, opening a PDF from the Downloads folder, and concluding the extension is broken when it does nothing. It isn’t broken; Chrome hasn’t let it see local files yet. The Allow access to file URLs switch fixes it in ten seconds. The second mistake is expecting read-aloud to help with a scanned textbook. If you can’t select the text with your mouse, there’s no text to read, and you need OCR first.

Recall check

Three questions. Answer them out loud before you open the answers.

  1. Does Chrome on a laptop have a built-in way to read a PDF aloud?
  2. What setting do you have to turn on before an extension can read a PDF saved on your computer?
  3. You open a scanned PDF, the extension plays nothing, and the file-access setting is already on. What’s the problem, and what fixes it?
Show answers
  1. No. Reading mode and Listen to this page are for web pages; a PDF needs an extension.
  2. Allow access to file URLs, under the extension’s Details page at chrome://extensions.
  3. A scanned PDF is an image with no text layer. Run it through OCR, for example Google Drive’s Open with Google Docs, then try again.

Try it

If you read a lot of PDFs for school or certification study, give Hearald a shot and put it in your browser.

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