Compress PNG Files Online Free
Compress PNG images online without losing transparency or quality. Reduce PNG file sizes by up to 70%. Free, private, runs entirely in your browser.
PNG is the go-to format for graphics with transparency — logos, icons, UI elements, screenshots, and illustrations. But PNG's lossless compression often produces files 5–10× larger than equivalent JPGs, which becomes a real problem when you need to upload them to a CMS, send them via email, or include them in a presentation.
Our PNG compressor uses quantization — it intelligently reduces the color palette from millions of colors down to the optimal subset that maintains visual fidelity. For most graphics and screenshots, this reduces file size by 50–70% while keeping transparency intact and colors accurate. You won't see banding, posterization, or blocky artifacts in the output.
This is particularly valuable for web developers who need crisp UI assets that won't bloat page load times, and for designers who share mockups and screen recordings via Slack or email. The entire process runs locally in your browser — your screenshots of sensitive dashboards and proprietary designs never leave your machine.
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Free, private, and works entirely in your browser. No signup required.
Open Compress Image ToolFrequently Asked Questions
No. Our PNG compressor preserves the alpha channel (transparency) completely. Semi-transparent pixels, drop shadows, and gradient fades all remain intact after compression.
If your image doesn't need transparency and is a photograph, converting to JPG will produce a smaller file. But for logos, icons, graphics, and screenshots with text, compressed PNG is the better choice because it preserves sharp edges and transparency.
PNG uses lossless compression, meaning it preserves every single pixel exactly as-is. This produces larger files than lossy formats like JPG. Our compressor applies smart quantization to reduce size while keeping visual quality high.