Optimize PNG Images
Optimize PNG images for faster page loads. Strip unnecessary chunks and colour profiles, optionally reduce the palette, and keep transparency intact.
Files never leave your device — 100% browser-based.
Why use this tool?
Built for speed, privacy and simplicity. No accounts, no installs, no watermarks.
Real PNG size reduction via optional colour quantization and dithering
Metadata (EXIF, colour profiles, extra chunks) stripped on re-encode
Transparency preserved · we never ship a larger 'compressed' file
How it works
Three simple steps. Everything happens in your browser.
Drop your PNG images into the box above
Open Advanced options and pick a colour reduction (256/128/64) or enable Aggressive PNG compression
Click Compress and download the smaller PNG — original is kept if no real reduction is possible
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Frequently asked questions
Quick answers about how this tool works.
Can PNG files really be made smaller?
Often yes — re-encoding strips metadata, and our optional colour reduction (256/128/64 colours) plus dithering can shrink PNG files significantly. If a PNG is already optimised we keep your original instead of shipping a larger file.
Will transparency be preserved?
Yes. PNG transparency (alpha channel) is preserved through every reduction mode, including colour quantization and dithering.
What if my PNG can't be made smaller?
We never lie: if the re-encoded output is larger than your original, we keep the original automatically and label it 'Already optimized'. For photos, WEBP or JPG will almost always create a much smaller file.
Are my images uploaded anywhere?
No. All compression happens locally in your browser using the Canvas API. Your files never leave your device.
Is the compressor free?
Yes — fully free, unlimited, no account, no watermarks.
Does it work on mobile?
Yes. The compressor is fully responsive and runs on any modern phone, tablet or desktop browser.