How to Compress a PNG File (Smaller Without Losing Quality)

PNGs are lossless and often huge. Here's how to compress a PNG while keeping transparency and crisp edges — free.

PNG files are lossless — great for logos, screenshots and transparency, but often surprisingly heavy. Compressing a PNG shrinks it while keeping the crisp edges and transparency PNG is loved for. Here's how to compress a PNG file, and when to switch formats instead — free.

Why PNGs get big

PNG stores every pixel losslessly, so photos and detailed images balloon. For flat graphics, logos and screenshots it's efficient; for photographic content it's wasteful. Knowing which you have decides the best approach.

How to compress a PNG (free)

Step 1 — Open the compressor at sjpt.io.

Step 3 — Compress — it reduces the file while keeping edges and transparency.

Step 4 — Download the smaller PNG.

No watermark, no sign-up.

PNG, or switch formats?

Keep PNG for transparency, logos and sharp text. Switch to JPG if it's a photo with no transparency — you'll save far more. Switch to WebP for the web — same quality and transparency at a fraction of the size. Match the format to the content for the smallest file.

Keep it crisp

Compress the original, not a re-saved copy. If you don't need transparency, converting a photographic PNG to JPG or WebP usually beats compressing the PNG. For icons and line art, PNG compression keeps everything sharp.

Frequently asked questions

Upload it to JPT AI's compressor and download the smaller PNG. Transparency and edges are kept. Free, no watermark.

PNG is lossless, so photos don't compress well. For photographic PNGs, convert to JPG or WebP instead.

Yes — PNG compression preserves the alpha channel.

WebP is usually much smaller at the same quality and keeps transparency — great for websites.

Key takeaways

Compress a PNG to keep transparency and crisp edges — but for photographic PNGs, converting to JPG or WebP saves far more. Free at sjpt.io. Compress PNG Free →