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Font Size Increase™
Increase font size online.

Available for
Google Chrome web browser
Font Size Increase browser extension

Font Size Increase - Browser Extension

How to open your Font Size Increase in your web browser?

Download the Browser Extension

First, download the free Font Size Increase browser extension that is available for all major web browsers. That by clicking on the blue download button to get it installed in your favorite web browser. When the installation is completed, you will see the Font Size Increase icon in your web browser toolbar.

Install Font Size Increase browser extension

One Click on to increase the font

With a single click on the Font Size Increase icon 'A Plus' in your web browser, the current web page enlarges all text one pixel higher. And that includes all text in the body, navigation top bar, hyperlink, button, image caption, and footer. And it keeps the size of all images and video on the current web page.

One Click on the Font Size Increase button

Double Click to reset it

If you want to reset your font size to the default font size of the web page. Double-click the Font Size Increase icon 'A Plus' icon, that will reset it to the default font size of the current web page. It is as simple as that to get the web-reading experience that is comfortable for your eyes. That on works on news sites, blog sites, etc.

Double Click on the Font Size Increase button


What is a Font Size Increase?

It is a free and Open-Source Web accessibility tool to control the website font size. When you install for the first time the Font Size Increase button, it will add the A Plus icon in your web browser toolbar. And with a single click it increases the font size with one pixel higher than the website set font size.

Installed Font Size Increase Chrome extension with the visible sidebar icon in the toolbar

Useful Features

Reset Font Size

And with a double click on the A Plus icon, it will restore to the website default font size. So there is no need to refresh the web page. Or need to find the correct video time to continue watch that YouTube video you are watching.

Privacy, Security, and Performance

Manifest V3 focuses on the three pillars of that vision: privacy, security, and performance, while preserving and improving our foundation of capability and webbiness. This browser extension is using this latest Manifest V3 technology. So you get the ultimate security, performance and privacy in your web browser.


The Font Size Increase browser extension only works on the current tab. That is because it only has the "Activetab" permission, so it will not detect the webpage URL of other tabs. It only works when you invoke on the A Plus browser extension button.


Arabic, Bulgarian, Bengali, Catalan, Czech, Danish, Deutsch, English, English (UK), English (United States), Spanish, Spanish (Latin America), Estonian, Greek, Farsi, Filipino, Finnish, French, Gujarati, Hebrew, Hindi, Croatian, Hungarian, Bahasa Indonesia, Italic, Japanese, Korean, Lithuanian, Latvian, Malay, Malayalam, Marathi, Dutch, Norwegian, Polish, Portuguese (Brazil), Portuguese (Portugal), Romanian, Russian, Slovak, Slovene, Serbian, Swedish, Tamil, Telugu, Thai, Turkish, Ukrainian, Vietnamese, Chinese (Simplified), Chinese (Traditional)

Installation of the extension

Over-the-air updates

You always get the latest version of this browser extension. If a newer version is available, the Font Size Increase extension automatically updates to the latest version, so you always get the latest and greatest new features. The update packages are small and are completely free.


This is a browser extension and is only available for the modern internet web browsers such as:

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Press Expert Review


Many bloggers and journalists found this a great browser extension, to help get the perfect and comfortable reading experiencing for our eyes.

Font Size Increase browser extension FAQ

Is the Font Size Increase a free browser extension?

Yes, Font Size Increase is a free and open-source browser extension for the latest modern web browsers. That includes Google Chrome, Microsoft Edge, Brave, Vivaldi, Cốc Cốc, and Naver Whale. And it will help to adjust the website font size to your perfect reading experience for your eyes.

Do you inject ads on all websites when I install this Font Size Increase Browser extension?

No, I take the privacy of my users very seriously. And the Font Size Increase Browser extension will not do these bad activities. Furthermore, there is no Google Analytics script inside that detects the user browser activity.

How can I reset the font size to the default value?

With a double click on the A Plus icon, it restore to the website default font size. Also, you can refresh the web page, that will show you back the default website font size.

Note: Only available for in the latest version of Google Chrome 33, Opera 15, Firefox 64, Microsoft Edge 76 and higher.