Can I invert PDF colors on my iPhone?

December 21, 2025 · caitlin

Inverting PDF colors on your iPhone can enhance readability, especially in low-light environments. This feature is particularly useful for reducing eye strain and saving battery life on devices with OLED screens. Here’s how you can invert PDF colors using various methods on your iPhone.

How to Invert PDF Colors on iPhone?

To invert PDF colors on your iPhone, you can use the built-in accessibility features or third-party apps. The most straightforward method is to use the "Smart Invert" feature available in iOS settings. Here’s a step-by-step guide:

  1. Open Settings on your iPhone.
  2. Navigate to Accessibility.
  3. Tap on Display & Text Size.
  4. Enable Smart Invert. This option inverts the colors of the display, except for images, media, and some apps that use dark color styles.

This method will invert colors across your device, including PDFs viewed in apps like Apple Books or Safari.

Using Third-Party Apps to Invert PDF Colors

If you prefer not to invert all colors on your device, you can use third-party apps specifically designed for PDF viewing and editing. Here are some popular options:

1. Adobe Acrobat Reader

Adobe Acrobat Reader allows you to change the background color of PDFs:

  • Open the PDF in Adobe Acrobat Reader.
  • Tap the View Mode icon.
  • Select Night Mode to invert the colors for easier reading in dark environments.

2. PDF Expert

PDF Expert offers more customization for PDF viewing:

  • Open your PDF in PDF Expert.
  • Tap the View Settings icon.
  • Choose Night Mode or customize the background and text colors to your preference.

Benefits of Inverting PDF Colors

Inverting colors on PDFs can offer several advantages:

  • Reduced Eye Strain: Dark backgrounds with light text are easier on the eyes in low light.
  • Battery Efficiency: Devices with OLED screens use less power displaying dark colors.
  • Improved Focus: A dark background can help minimize distractions, allowing for better concentration.

People Also Ask

How do I change PDF background color on iPhone?

To change the PDF background color on an iPhone, use apps like PDF Expert or Adobe Acrobat Reader. These apps offer options to switch to night mode or customize the background color directly within the app.

Can I invert colors for specific apps only?

Currently, iOS does not support inverting colors for specific apps only. However, many apps, like Adobe Acrobat Reader and PDF Expert, provide their own settings for dark modes or color inversion.

Are there any free apps to invert PDF colors on iPhone?

Yes, Adobe Acrobat Reader is a free app that allows you to invert colors by switching to night mode. Other free apps may also offer similar features, but availability and functionality can vary.

Does inverting colors affect battery life?

Inverting colors can positively impact battery life on OLED screens, as these displays use less power to display black or dark colors. However, the effect on battery life can vary depending on usage and screen brightness.

Is Smart Invert the same as Dark Mode?

Smart Invert is similar to dark mode, but it is not identical. Smart Invert reverses the colors of the display, excluding images and media, while dark mode is a system-wide theme that many apps support natively.

Conclusion

Inverting PDF colors on your iPhone is a simple and effective way to enhance readability and reduce eye strain. Whether you use the built-in Smart Invert feature or opt for a third-party app like Adobe Acrobat Reader or PDF Expert, you have multiple options to make your PDF reading experience more comfortable. Explore these methods to find the one that best suits your needs.

For more tips on optimizing your iPhone usage, check out our articles on iPhone battery-saving techniques and best iPhone apps for productivity.

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