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Compress PNG Online – Free PNG Compressor | ZeroKB

Compress PNG Online

Compress PNG images to a target file size while keeping the best possible image quality directly in your browser.

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Compress PNG Online

Upload Your PNG Image

Drag and drop a PNG image here or select an image from your device.

PNG Image Preview
PNG Image Preview
Target File Size
The image dimensions stay unchanged. The compressor automatically searches for the closest PNG size to your target while keeping the highest practical quality.
Preparing...

✓ PNG Compression Complete

-Original
-Compressed
-Saved
-Dimensions
-Target
Download Compressed PNG
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How to Compress PNG Image

Compress your PNG in a few simple steps.

1

Upload PNG

Select or drag and drop your PNG image into the compressor.

2

Set Target Size

Enter the file size you want in KB or MB.

3

Compress

The browser automatically optimizes PNG compression while keeping the original dimensions.

4

Download

Download your optimized PNG immediately after processing.

PNG Compressor Features

Useful controls for reducing PNG file size.

Target Size

Automatically tries to get the output close to your selected KB or MB target.

Color Optimization

Uses PNG color quantization to reduce file size while retaining visual detail.

Transparency Support

PNG transparency is retained during browser-based compression.

No Server Upload

Your image is processed locally in your browser.

Related Image Tools

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Frequently Asked Questions

Common questions about compressing PNG images online.

Can I compress a PNG to a specific file size?
Yes. Choose Target Size and enter your required size in KB or MB. The compressor automatically searches PNG compression settings while keeping the original dimensions.
Does PNG compression keep transparency?
Yes. The browser-based PNG encoder keeps the alpha channel so transparent areas can remain transparent.
Will the target size always be exact?
PNG output size depends on image content, dimensions and color complexity. The compressor uses adaptive size searching to get as close as possible to the requested target and reports the actual difference.
Are my PNG images uploaded to a server?
No server upload is required for the compression process. The image is processed locally in your browser.
Can I use this PNG compressor for free?
Yes. The PNG compression tool is free to use.
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