Need to Compress PNG files that are far too heavy? PNG is a fantastic format for logos, screenshots, and graphics with sharp edges or transparent backgrounds — but that quality comes at a cost: PNG files are often 5–10× larger than a JPG of the same image. A single UI screenshot or a transparent logo can easily balloon past 1MB, slowing down your website and clogging up email and upload forms. Here is the catch most "PNG compressors" hide: PNG is a lossless format, so simply re-saving it (which is all a basic tool does) barely changes the size. GoPDFGo does it properly. Our tool uses smart colour quantization — the same technique behind pngquant and TinyPNG — to intelligently reduce the number of colours in the image to a carefully chosen palette. Your eyes barely notice the difference, but the file gets up to 80% smaller, and the transparent background is fully preserved. And like every GoPDFGo tool, it runs entirely in your browser. Your screenshots, designs, and ID images are never uploaded to any server — the whole thing happens on your own device.
Why Our PNG Compressor Is Different
Real Compression, Not Just Re-Saving
Because PNG is lossless, a plain re-save saves almost nothing. Our engine uses colour quantization to map millions of colours down to an optimised palette, cutting file size by 40–80% while keeping edges crisp. Slide the quality control to balance size against colour fidelity.
Transparency Fully Preserved
Compressing a logo, sticker, or cut-out? The alpha channel (transparency) stays intact, so your PNG keeps its see-through background and drops onto any design cleanly — just much lighter.
Target Size Mode & 100% Private
Need a PNG under an exact limit? Switch to Target Size (KB) mode and the tool shrinks toward your cap automatically. Everything runs in your browser on your own device — no PNG is ever uploaded to a server.
Best Times to Compress a PNG
Faster Websites: Heavy PNG logos, icons, and hero graphics slow your pages and hurt Core Web Vitals. Compress them to load instantly without losing sharpness or transparency.
Screenshots & Documentation: Screenshots save as huge PNGs. Shrink them before adding to a blog, PDF, presentation, or a bug report so they upload and load quickly.
Logos & Design Assets: Send lighter transparent logos and UI assets to clients or teammates, or bundle them into an app without bloating the download size.
Form & Portal Uploads: Some portals accept PNG but cap the size at 100KB or 200KB. Use Target Size mode to fit the exact limit while keeping the image readable.
How to Compress PNG Online
Select PNG Files: Click 'Upload' or drag and drop your PNG images. You can compress several at once.
Pick a Mode: Drag the Quality slider to balance size and colour detail, or switch to Target Size (KB) and choose a cap like 100 KB to hit an exact limit.
Process: The tool quantizes the colours in your browser and shows the new size and how much you saved (e.g. -76%).
Download: Save your lighter PNG — with its transparency intact. Your original files stay untouched.
PNG Compression FAQs
How can you compress a PNG when PNG is lossless?
We use colour quantization — the same approach as pngquant and TinyPNG. Instead of storing millions of colours, the image is remapped to a smaller, carefully chosen palette. The result looks almost identical but is dramatically smaller. It is technically 'lossy', but for logos, screenshots, and graphics the difference is usually invisible.
Will the transparent background be kept?
Yes. The alpha channel is fully preserved, so transparent logos and cut-outs stay transparent after compression.
How do I compress a PNG under 100KB or 200KB?
Switch to Target Size (KB) mode and pick or type your limit. The tool reduces the colour palette (and, if needed, gently resizes) to land under that size — handy for forms and portals with strict caps.
PNG or JPG — which should I use for a photo?
For photographs, JPG is almost always smaller — use our Compress JPG tool for those. PNG shines for logos, screenshots, text, and anything needing transparency, which is exactly what this tool is built to compress.
Is my PNG uploaded anywhere?
Never. The entire compression runs inside your browser using your device's own processor. Your images are never sent to or stored on any server.
Why did my PNG barely shrink at the highest quality?
At the top of the slider we keep the image lossless, which barely changes the size (that is just how PNG works). Lower the quality a little to let colour quantization kick in — that is where the big savings come from.