MyToolsBenchCompress PNG
Reduce the size of your PNG images without visible quality loss. Everything runs in your browser — nothing is uploaded.
How to compress a PNG
PNG is lossless, so it has no quality dial in the usual sense. This tool shrinks a PNG by reducing the number of colours it stores — which works very well for logos, icons, screenshots and flat graphics, and poorly for photographs.
- Drop your images in, or click Choose Files.
- Pick Quality to set the level yourself, Target file size to compress until the file is under a limit, or Resize to shrink the dimensions as well.
- Click Compress, then download each file or take them all as a ZIP.
Made for PNG
If your PNG is actually a photograph, converting it to WebP or AVIF will save far more than compressing it as PNG ever could. Use the converter for that.
See it before you save
The estimated size updates as you move the slider, and every result has a compare view so you can check the quality against the original at full size.
Nothing is uploaded
Your images are compressed by your own browser and never sent anywhere, so there is no size cap, no queue, and no copy of your photos on someone else's server.
Compress by format
Guides and presets for each format:
Compress under a file size
Keeps your image’s format — pick the limit you need:
JPEG under a file size
How much can I compress without it showing?
For photographs, quality 80 is the usual sweet spot — roughly a 70% reduction with no visible difference at normal viewing size. Below about 60 you start to see softening in fine detail and blocky patches in smooth areas like skies.
Flat graphics, screenshots and anything containing text behave differently. Sharp edges are exactly what lossy compression handles worst, so keep the quality above 85 or convert to PNG instead.
The honest answer is that it depends on the image, which is why the compare slider exists. Drag it across the result at full size and judge for yourself rather than trusting a number.
Why PNG compression has a hard ceiling
PNG's compression is lossless, so how much it can shrink depends entirely on how many distinct colours the image contains. A screenshot, icon or flat graphic with a small palette can shrink dramatically. A photograph, with potentially millions of distinct colours, barely compresses at all — there is no equivalent of a JPG quality slider that trades detail for size, because PNG is not designed to discard anything.
If you are compressing a photograph and the PNG barely shrinks, that is expected behaviour, not a failure of this tool. Converting the photo to WebP or JPG first will produce a far smaller result.
Frequently asked questions
Why is my compressed PNG barely smaller?
PNG compression depends on how many distinct colours the image uses. A photograph has millions, so reducing the palette either barely helps or starts to show banding. Convert photos to WebP instead.
Does compressing reduce image quality?
For JPG, WebP and AVIF, yes — that is how they achieve small files. The point is to discard detail you cannot see. At quality 80 most photographs look identical while losing most of their file size. Use the compare view on any result to check before downloading.
Why did my PNG barely shrink?
PNG is lossless, so there is no quality dial to turn. This tool reduces the colour palette instead, which works well for logos, icons and flat graphics but does little for photographs. For a photograph stored as PNG, converting it to WebP or AVIF will save far more than compressing it ever could.
What does removing metadata do?
Photos carry EXIF data — camera model, settings, timestamp and often the GPS coordinates of where the picture was taken. Stripping it saves a little space and stops your images broadcasting where you were. It is on by default here.
How does the target file size option work?
It compresses the image repeatedly at different quality levels, narrowing down until it finds the highest quality that still fits under your limit. That takes a few extra moments per image but means you get the best possible result at the size you need.
Is there a limit on file size or how many images?
No. Compression runs inside your browser rather than on a server, so there is no upload, no queue and no cap. Very large images may take a moment on a slower device.
Are my images uploaded anywhere?
No. They are read and compressed by your own browser and never leave your device. You can disconnect from the internet once the page has loaded and it will still work.