PNG Compressor
Compress PNG files without resizing them: smaller files with transparency intact, one image or many. Free, nothing uploaded.
How it works
Open the image
It is decoded in this tab at its own resolution. Nothing is uploaded.
Set the quality
The result and its byte count update as you drag, so you can stop at the point where you can no longer see the difference.
Download
The file comes back the same pixel size it went in at.
Compress png: png compressor, reduce png size
Compress PNG files without resizing them: this png compressor keeps the transparency intact and shows the new size before you download. Compress one image or many at once, in your browser.
People also search for
- compress jpeg
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- compress image to 100kb
Why it matters
Not resized behind your back
The image keeps the pixel dimensions it arrived with unless you set a longest edge yourself. A smaller number on a smaller picture is not a saving.
The photograph stays a photograph
This re-encodes the original pixels. It does not trace them into flat shapes, which is what turns a sky into stripes.
A result that is not better is labelled
A photograph re-saved as PNG is often larger than it started. When that happens the page says so and says what to try instead.
Questions
Will the image get smaller in pixels?
No, not unless you ask. The longest-edge box is zero by default, which means keep the size.
Why is my PNG not getting smaller?
PNG is lossless, so quality does nothing to it. The saving available in a browser is reducing the number of colours, which is the Colours slider, or saving as JPEG if the image has no transparency.
Is the file uploaded anywhere?
No. It is read by this page and never leaves the machine.