What is a PNG file?

The PNG format in brief: what it is, what it is used for, and how to convert it.

PNG: conversion steps

  1. Upload your PNG file to start.
  2. Convert PNG to AVIF.
  3. Download the PNG file.

About PNG files

a lossless image format with transparency

PNG (Portable Network Graphics) is a lossless image format created in 1996 as a free replacement for GIF. It supports full colour and an alpha channel for transparency.

Screenshots, logos, icons, diagrams and any image with text or sharp edges.

PNG: what conversion changes

Converting PNG re-encodes pixels.

PNG: settings to change

Before you convert PNG files, you can adjust: Width, Height, Scale fit, Crop position, Never enlarge, Quality, Lossless, Progressive, Remove metadata, Auto-orient from EXIF, Rotate, and Background.

Limits of the PNG format

For photos a PNG is several times larger than a JPEG, and plain PNG has no animation (that is APNG).

Common questions about PNG

Why is my PNG so much bigger than the same photo as JPG? PNG stores every pixel losslessly, which is ideal for screenshots and graphics but wasteful for photos — JPG or WebP compress photographs far more efficiently.

Why convert an image to PNG? When sharp lines, text and transparency matter more than file size: screenshots and logos stay pixel-perfect.

Convert PNG files

Guides and tools for PNG