Is PNG compression here lossless?

No, and we want to be upfront about that. Plain lossless PNG re-encoding barely reduces file size for most images. To get real, meaningful savings, this tool uses palette-based color quantization — it reduces the number of distinct colors in the image, which is a form of lossy compression for the color data. Higher compression levels use fewer colors and a lower quality target, trading more visual fidelity for a smaller file.

Which compression level should I choose?

Standard is the best choice for most use cases — a good balance between quality and file size. Use Low if visual quality matters most. Use High if file size is the top priority and some visible color banding is acceptable.

Will compressing affect transparency?

No. Alpha transparency is preserved through compression — only the color palette is reduced, transparent areas stay transparent.

How much will my image be compressed?

It depends on the content of your image. Photos and images with lots of colors and detail see the largest reductions. Simple graphics with few colors already compress well and may see smaller gains. You will always see the resulting file before downloading.

Can I compress other image formats?

This tool only accepts PNG files. Use Compress Image for JPG or Compress WebP for WebP files.

Are my files kept private?

Your files are processed on our servers solely to perform the compression. They are deleted automatically once the download is complete and are never shared or stored long-term.

Compress PNG Online

Upload a PNG image and reduce its file size in seconds — choose your compression level and download the result.

Drop your file here, or click to browse

.png · max 20 MB

FloxerFile compresses your PNG images directly in your browser, reducing file size while keeping the image usable. Because PNG is a lossless format by default, meaningful size reduction comes from palette-based color quantization — reducing the number of distinct colors used to represent the image. Choose from three compression levels depending on your needs: low for maximum quality preservation, standard for the best balance, or high for the smallest possible file. Perfect for speeding up page loads, fitting upload limits, or saving storage space.

How it works

1
Upload your PNG
Drag and drop your PNG image, or click to browse. Files up to 20 MB are supported.
2
Choose a compression level
Select Low, Standard, or High depending on how aggressively you want to reduce the file size.
3
Compress
Click Compress PNG. The compression runs on our servers and completes in a few seconds.
4
Download your compressed PNG
Download the compressed PNG to your device.

Features

Three compression levels
Low, Standard, and High give you control over the quality/size trade-off.
Real, meaningful size reduction
Uses palette-based color quantization to genuinely shrink the file, not just lossless re-encoding, which barely moves the needle for most PNGs.
Transparency preserved
Alpha transparency in your PNG is kept through the compression process.
Privacy-first
Files are processed in memory and deleted immediately after download.
Free & no sign-up
No account, no credit card, no limits on the number of compressions.

Supported formats

.png

PNG

Portable Network Graphics images, including those with transparency.

Output format: .png

Frequently asked questions

Is PNG compression here lossless?: No, and we want to be upfront about that. Plain lossless PNG re-encoding barely reduces file size for most images. To get real, meaningful savings, this tool uses palette-based color quantization — it reduces the number of distinct colors in the image, which is a form of lossy compression for the color data. Higher compression levels use fewer colors and a lower quality target, trading more visual fidelity for a smaller file.
Which compression level should I choose?: Standard is the best choice for most use cases — a good balance between quality and file size. Use Low if visual quality matters most. Use High if file size is the top priority and some visible color banding is acceptable.
Will compressing affect transparency?: No. Alpha transparency is preserved through compression — only the color palette is reduced, transparent areas stay transparent.
How much will my image be compressed?: It depends on the content of your image. Photos and images with lots of colors and detail see the largest reductions. Simple graphics with few colors already compress well and may see smaller gains. You will always see the resulting file before downloading.
Can I compress other image formats?: This tool only accepts PNG files. Use Compress Image for JPG or Compress WebP for WebP files.
Are my files kept private?: Your files are processed on our servers solely to perform the compression. They are deleted automatically once the download is complete and are never shared or stored long-term.

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JPG to PNG

Convert a JPG or JPEG image into a PNG file.

Ready to reduce your PNG size?

Upload your PNG above and compress it in seconds.