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.PNG file extension

To open .PNG files on Windows, double-click to open in the Photos app or a web browser.

.png files are high-quality images that support transparency. They can be opened with most image viewers, web browsers, and editing software.

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Last updated: March 19, 2026 · Reviewed by Julian Stricker

What “reviewed” means on this page
  • Format fit: whether the “what is this file?” description matches common real-world use of the extension, including category, typical MIME types, and aliases.
  • Opening paths: whether Windows / macOS / Linux steps read plausibly for current OS dialogs and default apps; we remove fantasy menus and unsafe shortcuts.
  • Security framing: whether risk notes match the extension class (for example executables vs plain data) and whether affiliate wording does not contradict the security section.
  • Sources and further reading: whether external links point to vendors, standards bodies, or other primary references where possible; we avoid inventing details we cannot ground.
  • Limits: this is clarity and safety-messaging QA, not a guarantee that every statement is exhaustive or that every binary you download is harmless.

Full methodology in the Imprint — The Imprint also states where AI is used and what that does—and does not—replace.

Open on your device

Choose your operating system for a dedicated step-by-step opening guide.

How to open .PNG files

Use these platform-specific instructions to open .PNG files safely.

Windows

  1. Double-click to open in the Photos app or a web browser.
  2. Edit using Paint.NET, Adobe Photoshop, or GIMP.
Full Windows guide

Mac

  1. Open with Preview by double-clicking.
  2. Edit using Adobe Photoshop or Pixelmator for advanced features.
Full Mac guide

Linux

  1. View with default image viewers like Eye of GNOME.
  2. Edit using GIMP or Krita for more options.
Full Linux guide

iOS

  1. Tap to open in the Photos app.
  2. Use editing apps like Procreate for advanced editing.
Full iOS guide

Android

  1. Open with the default Gallery app.
  2. Edit using apps like Snapseed for additional features.
Full Android guide

Security notes

  • Avoid opening PNG files from untrusted sources.
  • Ensure your image viewer or editor is up to date to prevent exploits.
  • Be cautious of metadata that might contain sensitive information.

Complex decoders and untrusted media

Image, audio, and video decoders are large software surfaces; issues are uncommon for everyday files but show up with crafted files from unknown sources. Keeping the OS and media apps updated matters most; scanning is reasonable extra caution for downloads you cannot vouch for.

Avast

Avast offers free and premium antivirus software that protects against viruses, malware, ransomware, and phishing. Scan files before opening them to ensure safety.

Norton

Norton 360 delivers comprehensive antivirus protection, VPN, and identity theft monitoring. Scan files for threats before opening to keep your device secure.

We may earn a commission when you use affiliate links. This supports our free file extension guides.

Can't open this file?

These are the most common causes and fixes when .PNG files fail to open.

Common reasons

  • Large file size for detailed images
  • Transparency issues in some viewers

Fix steps

  1. Use tools like pngquant to compress the file.
  2. Convert to JPEG or WebP if transparency is not needed.

OS-specific troubleshooting

Convert .PNG to other formats

Use conversion tools to change .PNG files into formats your software supports.

What is a .PNG file?

PNG stands for Portable Network Graphics, utilizing lossless compression to maintain image quality. It is ideal for images requiring transparency, such as logos and web graphics, and supports a wide color palette.

Background

The PNG format was developed in the mid-1990s as a non-patented alternative to GIF, which was limited by a restricted color palette and licensing issues. PNG supports 24-bit color as well as 8-bit transparency, making it suitable for complex images with smooth gradients and transparent backgrounds. It is commonly used for web graphics, digital art, and images where quality is a priority. Despite its advantages, PNG files can be larger than other formats like JPEG, especially for photographic content, due to its lossless nature. An interesting fact about PNG is that it supports gamma correction, allowing images to be displayed consistently across different devices.

Common MIME types: image/png

Further reading

Authoritative resources for more details on the .PNG format.

Common .PNG issues

Large file size for detailed images

PNG's lossless compression can result in large file sizes for complex images.

  1. Use tools like pngquant to compress the file.
  2. Convert to JPEG or WebP if transparency is not needed.

Transparency issues in some viewers

Some older viewers may not display PNG transparency correctly.

  1. Update the image viewer or use a modern browser.
  2. Convert the image to a supported format if necessary.

FAQ

Why choose PNG over JPEG?

PNG is preferred for images requiring transparency and high quality, while JPEG is better for smaller file sizes and photographic content.

Can PNG files be animated?

Standard PNG does not support animation, but the APNG extension allows for animated PNGs.

How can I reduce the file size of a PNG?

Use compression tools like pngquant or optipng to reduce file size without losing quality.

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