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Compress PNG Online

Lighter screenshots, logos and graphics that stay in PNG format and still look crisp.

or drop files here · JPG, PNG, WebP, HEIC, AVIF and more

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Compress PNG files when screenshots, icons or design exports are too heavy for a website, a document or a chat. PNG keeps every pixel exactly as it is, which is great for sharp text and flat colors but often leaves a lot of room to save.

FileKiwi uses color quantization: it rebuilds the image with a smaller, carefully chosen set of colors. On graphics the difference is very hard to spot, and the file usually gets much smaller. Your PNG is processed on our server and deleted right after compression.

How to use Compress PNG

Upload your PNG

Drag in one PNG or several at once. Screenshots, logos, charts and exported designs all work.

Compress

FileKiwi reduces the color palette and shows the size before and after, plus the percentage saved.

Download

Save each PNG separately or get every file in one ZIP. Prefer an even smaller file? Choose JPG or WebP output.

Why use FileKiwi for this

Still a PNG

The output keeps the PNG format by default, so it works anywhere your original did.

Made for graphics

Flat colors, text and sharp edges compress very well with quantization and keep their crisp look.

Deleted after use

PNG files are processed on the FileKiwi server and removed right after compression. No account needed.

Batch friendly

Compress a whole batch of screenshots in one go and download the whole set as a ZIP.

Compress PNG with color quantization: how it works

A full color PNG can hold millions of different colors. Most screenshots and logos use only a small share of them. Color quantization picks a limited palette that matches the image closely and maps every pixel to the nearest color in that palette.

Because PNG itself is lossless, the saved file has no blur and no blocky patches. The only change is in the colors, and on interface screenshots, diagrams and icons that change is usually invisible. Smooth gradients and photos are where you may notice slight banding.

Since the result is still a PNG, you can keep using it in slides, design tools and web pages exactly as before.

Quantization shines on images with large areas of the same color. A settings screen, a slide exported from a presentation, or a flat illustration often loses a big share of its weight. A detailed digital painting has more shades to keep, so it shrinks less.

Should your PNG really be a PNG?

Many large PNG files are actually photos. Phones and some apps save pictures or screenshots of photos as PNG, and that is the most wasteful case. Use this quick check:

Image typeBest format
App or website screenshotPNG, compressed
Logo or icon with a see through backgroundPNG, compressed
Camera photo or scanned pictureJPG or WebP
Graphic for a modern websiteWebP

If your PNG is a photo, switch the output to JPG or WebP, or use PNG to JPG and PNG to WebP. Remember that JPG has no transparency, so pick it only for images without see through areas.

Working with mixed files? Compress Image handles JPG, PNG and WebP together, and the image tools page lists everything else you can do.

Keep the uncompressed original for future edits.

Compress PNG: frequently asked questions

How do I compress PNG files without losing quality?

PNG compression on FileKiwi reduces the number of colors instead of blurring pixels. On screenshots, logos and diagrams this is very hard to see. Smooth gradients may show light banding, so check those images before replacing the original.

Does a compressed PNG keep its transparent background?

The file stays in PNG format, which supports transparency, so it remains a PNG you can place on any background. If you switch the output to JPG, transparency is lost, because the JPG format cannot store see through areas.

Is my PNG file uploaded?

Yes, PNG compression runs on the FileKiwi server because color quantization needs it. Each file is deleted right after processing, nothing is kept, and you do not need to create an account.

Why did my PNG barely get smaller?

Some PNG files already use few colors or were optimized before, so there is little left to remove. Large PNG photos are another case: they hold too much color detail. Saving those as JPG or WebP gives a much bigger drop.

Can I compress many PNG screenshots at once?

Yes. Drop the whole batch onto the page and FileKiwi compresses every file. When it finishes, download each PNG on its own or save them all together in one ZIP archive.

Related tools

Remove BackgroundAI

Cut out the subject and get a transparent PNG.

White BackgroundAI

Replace any photo background with clean white.

Resize Image

Change image dimensions in pixels or percent.

Compress Image

Shrink JPG, PNG and WebP files with smart quality.

Compress JPG

Reduce JPG file size and keep photos looking good.

Crop Image

Cut photos to any size or aspect ratio.

Reviewed by Anna Lewiński, FileKiwi editor. Last updated October 5, 2026.