Compress PNG Online
Reduce PNG file size while keeping the original dimensions. SWD Image Compressor applies the maximum compression available for the format from the start and shows the savings achieved.
The original width and height will be kept exactly; only the format and file size will be optimized.
Compression
The result will show the original size, final size and achieved savings.
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PNG in numbers
PNG compression statistics
- PNG generated
- 2Only downloaded files compressed as PNG are counted.
- Average saving with PNG
- 76.1%Average percentage saved when compressing as PNG.
- Most used formats
- #4Ranking by the number of valid downloads in which PNG was the final format.
Frequently asked questions about PNG compression
How do I compress a PNG image online?
Select your PNG image in SWD Image Compressor and run compression. SWD Image Compressor keeps the original dimensions and applies the maximum compression available for the format from the start.
Does compressing a PNG preserve transparency?
PNG supports transparency. If your image uses it, SWD Image Compressor can preserve it with compatible formats such as PNG, WebP or AVIF; JPEG does not support transparency.
Does compressing a PNG change its dimensions?
In SWD Image Compressor Compression, compression keeps the image width and height. Resizing is a separate operation.
Does PNG use lossless compression?
PNG is a lossless compression format. SWD Image Compressor can also evaluate other compatible formats to produce a lighter file; if the final result uses lossy compression, a visual difference may occur.
Why do some PNG files barely get smaller?
A PNG may already be optimized or contain information that does not allow a large reduction without changing format or compromising features such as transparency.
Does SWD Image Compressor look for the maximum possible compression for a PNG?
Yes. SWD Image Compressor works directly with the maximum compression available for the format from the start of the process. There is no prior recommended-compression mode or choice between two compression levels.
Can SWD Image Compressor generate WebP or AVIF when compressing a PNG?
When the Compression settings allow it, SWD Image Compressor can evaluate compatible formats and select a more efficient result than the original PNG.
When should I keep PNG as the final format?
PNG remains a good choice for images with transparency, graphics with sharp edges, screenshots and assets where preserving the content without loss matters.
Can repeatedly compressing the same PNG reduce quality?
If the file stays as lossless PNG, re-encoding should not introduce visual loss by itself, although it may not reduce the file size further. Converting to a lossy format can introduce degradation.
What happens if my PNG is already well compressed?
If additional compression, whether in PNG or another compatible format, does not provide a worthwhile improvement, SWD Image Compressor will indicate this instead of presenting a result that is not worth it as an optimization.