Compress PNG images with Optimaza

Upload up to 10 PNG images from your device or drop them into the upload area. Compression starts automatically after upload.

Image optimization happens locally in your browser — no uploads, no storage. You can fine-tune the compression percentage in the menu. You can also set a max width or height to fit images.

Download compressed PNG files one by one or all together.

JPEG PNG

Drag and drop images here

Up to 10 JPEG or PNG files. Compression happens in your browser.

Select PNG files

You can also drop files here.

PNG compression reduces file size while keeping transparency intact, which is important for UI graphics, icons, and overlays. PNG files can be large because they store detailed pixel data, which increases file size for web and sharing. Optimaza is a browser-based PNG compressor that reduces file size without uploading files to a server.

Why compress PNG images

Maintain transparency for design and UI assets
Improve web performance and page speed
Reduce size of icons, screenshots, and UI graphics
Speed up delivery on mobile and slow networks

How this PNG compressor works

Select up to 10 PNG images or drag them into the drop zone
Compression runs locally in your browser using client-side processing
Review size savings and keep transparency intact
Download optimized files one by one or all together
Resize images by setting a max width or height (fit to size). This can reduce file size for web, email, and sharing; smaller images are not upscaled.

Security and privacy

PNG compression runs entirely on your device. Your files are not uploaded to a server, stored, or shared.

When to use PNG compression

Websites that use transparent images
Icons and UI assets in web apps
Screenshots or diagrams with transparency
Design handoff files that need smaller size

Frequently Asked Questions

Does this PNG compressor preserve transparency?

Yes. PNG transparency is preserved during compression.

Is this PNG compressor free to use?

Yes. You can compress PNG images online without registration.

Do you upload my PNG files?

No. Everything runs in the browser, so files stay on your device.

Is PNG compression lossless?

PNG compression typically reduces size without changing pixels, but results depend on the image and encoding.

How many PNGs can I compress at once?

You can compress up to 10 PNG files in a single batch.

Will colors or sharp edges change?

The tool re-encodes the PNG and aims to preserve visual quality, including crisp edges and colors.

Can I download all compressed PNGs together?