How to Darken Text in PDF

How to Darken Text in PDF

Hello Reader technogigs, are you struggling to read PDF documents with light text that strains your eyes? It can be frustrating trying to make out the information in a document with poor visibility. But, fear not! This article will take you through the steps of how to darken text in PDF.


PDFs are popular file formats, but sometimes the text can be difficult to read. PDFs are often scanned documents that may not be optimized for digital use, or they can be created with light-colored text, which can be challenging to read on a computer screen. In such cases, darkening the text can make it easier to read. While there are many tools available for making these adjustments, it’s essential to choose the right method based on your needs and the program you’re using.

In this article, we will explore some of the ways to darken text in a PDF file based on the software and device you’re using. We’ll also take a deep dive into the strengths and weaknesses of each method so that you can make an informed decision. You’ll walk away from this article with the knowledge you need to read PDF documents with ease.

Method 1: Using Adobe Acrobat

Adobe Acrobat is a popular PDF editor that offers several tools for editing PDF documents. It also provides users with an option to darken text. Here’s how to do it:

Steps Instructions
Step 1 Open the PDF you want to darken in Adobe Acrobat.
Step 2 Click on the “Tools” tab.
Step 3 Click “Edit PDF.”
Step 4 Click on the “Adjust Color” icon.
Step 5 In the “Adjust Color” panel, move the slider under “Brightness” to make the text darker.
Step 6 Click “OK” to save changes.

This method is only useful if you have Adobe Acrobat, which is not a free software. However, it’s a good option if you need to make more advanced edits to PDF documents and can afford to invest in an industry-standard product.

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Method 2: Using Browser Extensions

Another way to darken text in PDFs is by using browser extensions. These extensions change the display settings, making the text darker and easier to read on your screen. Here are the steps for using a browser extension:

Steps Instructions
Step 1 Install a browser extension that can darken PDFs, like “Dark Mode” for Google Chrome or “Nightlight” for Mozilla Firefox.
Step 2 Open the PDF in your browser.
Step 3 Click on the extension icon in your browser toolbar.
Step 4 Select the “Enable Dark Mode” or “Night Mode” option from the menu.
Step 5 Adjust the settings to your preference if needed.

This method is a free option that doesn’t require any special software, making it an accessible and convenient option. Plus, you can use it with any browser, so you don’t need to switch to a new one just for this feature.

Method 3: Using Online Tools

If you don’t want to install any software or extensions, you can use online tools to darken your PDFs. Here’s how it works:

Steps Instructions
Step 1 Go to an online PDF editor tool like Smallpdf or PDF2Go.
Step 2 Upload the PDF you want to darken.
Step 3 Use the “Contrast” or “Brightness” tool to darken the text.
Step 4 Save the edited PDF to your computer.

Online tools are user-friendly, and they don’t require any downloads or installations, making it a convenient option. However, if you’re working with sensitive information, this method may not be the best option because you must upload your file to a third-party site.

Strengths and Weaknesses

Each method has several strengths and weaknesses.

Method 1 Strengths

Adobe Acrobat is a powerful PDF editor with many features, making it a great choice for users who need to make more advanced edits to their PDF documents. The brightness adjustment tool is easy to find and use, and it provides fine-grained control over the text’s darkness.

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Method 1 Weaknesses

Adobe Acrobat is not a free software, so users must purchase it. For those who only need to darken the text in a few documents, the expense may not be worth it. Plus, it’s not as convenient as other methods that don’t require additional software.

Method 2 Strengths

Browser extensions are free and easy to install, and they work with any browser. If you’re not using Adobe Acrobat or another PDF editor, this method is an excellent option. Plus, you can use the extension to darken text across all websites, not just for PDFs, which is a fantastic bonus feature.

Method 2 Weaknesses

Browser extensions only work when you’re using your browser, so if you save the PDF file and view it in another application, it will appear in its original format. Additionally, not all extensions are created equal, and some may have compatibility issues with certain web pages or operating systems.

Method 3 Strengths

Using an online tool is a convenient option because you don’t need to install any software or browser extensions. It’s also a free option. Plus, the interface of online tools is usually user-friendly and intuitive.

Method 3 Weaknesses

Online tools require uploading your PDFs to a third-party site, which could be a potential security risk if your PDFs contain sensitive information. Plus, if you don’t have a reliable internet connection, this method may not be a viable option because uploading and downloading large files could take a long time.


1. Can I darken text in PDF file using Microsoft Word?

No, Microsoft Word is not a PDF editor software, and it doesn’t support editing PDF files.

2. What is the best free online PDF editor for darkening text?

The best free online PDF editor for darkening text is Smallpdf. It’s simple to use and has all the necessary features to edit a PDF file.

3. Is it possible to invert colors in a PDF file?

Yes, it’s possible to invert colors in a PDF file. Inverting colors will turn light-colored text into dark-colored text and vice versa.

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4. What is the difference between brightness and contrast?

Brightness refers to how light or dark the image is. Contrast refers to the difference in color and brightness between elements in an image.

5. Can I change the font size and style in a PDF file?

Yes, you can change the font size and style in a PDF file if you have a PDF editor that supports this feature.

6. What should I do if the text is still hard to read after darkening it?

If the text is still hard to read after darkening it, try enlarging the document or zooming in until the text is easier to read.

7. Is there an option to remove background images in a PDF file?

Yes, most PDF editors offer an option to remove background images.


In conclusion, there are several options available for darkening text in PDFs, each with its strengths and weaknesses. Choosing the right method depends on your specific needs and preferences. If you’re a frequent PDF user, it’s worth investing in a PDF editor like Adobe Acrobat. If you only need to darken text in a few documents, using a browser extension or an online tool is a more convenient option. Remember to always prioritize security and use the method that’s most appropriate for the sensitivity of your data.

Thanks for reading up till this point. We hope this article has been helpful in enlightening you on how to darken text in your PDF file. Feel free to ask any questions in the comments section.

Disclaimer: While we have done our best to provide accurate information, this article is for informational purposes only. Please consult with a professional if you have any concerns or issues.