Why compress PNG images?
PNG is the go-to format for graphics, screenshots, logos, and anything with transparency. But PNG files can be enormous. A screenshot of a complex web page might easily exceed 2-5 MB. Icons, illustrations, and UI graphics add up quickly when you have dozens on a single page.
Reducing PNG file sizes directly improves web page loading speed. Lighthouse performance audits almost always flag oversized PNG files as opportunities for improvement. Smaller PNGs mean faster initial page renders and better Largest Contentful Paint scores.
PNG compression is also essential for email and document workflows. Many email clients block or warn about attachments over 10 MB. Document management systems often cap uploads at specific sizes. Compressing PNGs before attaching or uploading avoids these friction points.
If you need even smaller files than PNG can achieve, consider converting to WebP. WebP provides better compression than PNG at similar quality levels, and modern browsers support it natively.
Compress your PNG in three steps
All compression is instant and completely private. No files are ever shared or stored.
Upload your PNG
Drag a PNG file onto the tool or click to browse. The original file size and dimensions appear immediately.
Set a target size
Enter a target size in KB. The tool adjusts compression and optionally scales dimensions to reach your target.
Download compressed PNG
Save the smaller PNG. Transparency is preserved in the output.
Tips for compressing PNGs effectively
Resize oversized images first
A 3000px-wide PNG destined for a 600px slot wastes enormous space. Resize to the display size before compressing for the biggest savings.
Convert photographic PNGs to JPEG
PNG is not efficient for photographs. If your PNG is a photo without transparency, converting to JPEG will be far more space-efficient.
Use WebP for maximum savings
WebP compresses graphics better than PNG while supporting transparency. If your platform supports it, WebP is the better choice.
Keep originals for design work
Always store the original full-quality PNG for any future design revisions. Work from compressed copies for web delivery only.
Check transparency after compressing
After compression, verify that any transparent areas still look clean, especially around edges and soft shadows.
Frequently asked questions
Is PNG compression lossless?
Standard PNG uses lossless compression. However, this tool may apply quality adjustments or dimensional scaling to hit a target size, which involves some quality trade-off.
Will transparency be preserved?
Yes. The tool preserves alpha channel transparency in the PNG output.
Why are PNG files so much larger than JPEGs?
PNG stores every pixel without lossy compression, which is great for quality but means larger files. For photographs, JPEG or WebP are far more efficient formats.
Is my file private and secure?
Your images are processed securely and stay private. They are never shared or stored anywhere.