How to open a .png file?

PNG files can be opened by most image viewers and editors. You can also convert PNG to other formats online using SquishConvert.

How to convert a .png file?

Upload your .png file to SquishConvert, select an output format, and click Convert. Your converted file will be ready to download in seconds.

Image format

.png

Portable Network Graphics

PNG is a lossless image format that supports transparency. It was created as an improved, non-patented replacement for GIF. PNG is ideal for graphics, logos, screenshots, and any image where quality preservation is critical.

MIME type

image/png

Developer

PNG Development Group

Introduced

1996

Advantages

Lossless compression — no quality loss
Supports full transparency (alpha channel)
Great for text, logos, and sharp-edged graphics
Universally supported across all browsers and platforms

Limitations

Larger file sizes than JPG for photographs
No animation support (use APNG or GIF instead)
Not ideal for print workflows (CMYK not supported)

When to use PNG

Website graphics and logos

Screenshots and UI mockups

Images with transparency overlays

Digital art and illustrations

Technical details

PNG uses DEFLATE lossless compression. It supports 24-bit RGB and 32-bit RGBA color with 8 or 16 bits per channel. PNG files include CRC checksums for error detection.