Compress PNG Online — Free & Private
Shrink PNG files in your browser without losing transparency. No uploads, no limits.
Drop your images here
or click to select files
Drop your PNG files above to compress them on your own device. PNG is lossless, so it is the right choice for screenshots, logos, icons, and any graphic with sharp text or transparency — and TinImg keeps all of that intact.
If your PNG is actually a photograph, you will get far smaller files by switching the format to WebP or JPEG above. PNG only wins on flat-color graphics; on a photo it can be five to ten times larger than it needs to be.
When to keep PNG, and when to switch
Keep PNG for logos, icons, screenshots, diagrams, and anything with transparency or crisp edges. Switch to WebP or JPEG for photographs — a photo saved as PNG preserves invisible detail at enormous file-size cost.
Not sure which fits your image? The JPEG vs PNG vs WebP guide walks through every case.
Keeping transparency
Transparent PNGs stay transparent here. If you want a smaller transparent file, switch the format to WebP — it supports an alpha channel at a fraction of PNG's size. The one thing you cannot do is convert a transparent image to JPEG, because JPEG has no transparency channel.
A worked example: screenshot vs photo as PNG
PNG behaves completely differently depending on what is in the image. Take a 1920×1080 screenshot of a dashboard — flat colors, sharp text, a few solid panels. As PNG it compresses efficiently, often landing around 120–200 KB, and stays pixel-perfect. That is PNG doing exactly what it is good at.
Now take a 1920×1080 photograph and save it as PNG: it can balloon to 3–5 MB, because PNG losslessly preserves every micro-variation in every pixel of the image. The same photo as a quality-80 WebP is around 130 KB — more than twenty times smaller, with no visible difference. If your 'PNG' is really a photo, switching the format above is the single biggest win available.
Private by design
Your PNGs never upload. Compression runs locally in your browser, so screenshots of internal tools or unreleased designs never touch a server.
Frequently Asked Questions
Does compressing PNG keep transparency?
Yes. Transparent areas are preserved. If you convert to WebP you also keep transparency at a smaller size; converting to JPEG would lose it.
Why is my PNG still large after compressing?
PNG is lossless, so if the image is a photograph it stays big by nature. Switch the format to WebP or JPEG above for a dramatically smaller file.
Are my PNGs uploaded to a server?
No. The compression runs entirely in your browser. Your files never leave your device.
What is the best format for screenshots?
PNG, or lossless WebP. Both keep text crisp. Avoid JPEG for screenshots — its lossy compression makes letters look fuzzy.
Further Reading
JPEG vs PNG vs WebP: Which Format Should You Use?
Understanding the strengths and trade-offs of the three most common image formats on the web.
5 min read
How Image Compression Works (Without Losing Quality)
A plain-language explanation of what happens when you compress an image, and why smaller doesn't always mean worse.
6 min read
Best Image Sizes for Web Performance in 2026
Practical guidelines for image dimensions, file sizes, and responsive delivery that keep your site fast.
5 min read