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PNG uses lossless compression — it stores every pixel exactly as-is. There's no "quality" dial to turn down the way JPEG has. This makes PNG ideal for graphics, screenshots, and logos where every pixel matters, but it means photographic PNGs are large by nature. A 6-megapixel PNG photograph can easily exceed 15MB, where the same image as JPEG would be 3–5MB.
The practical way to reduce a PNG's size without losing detail is to convert it to WebP. WebP supports both lossless and lossy compression and is typically 25–70% smaller than an equivalent PNG at the same visual quality. At 85% quality, the visual difference is indistinguishable for photographs.
Choose WebP when the image will be displayed on a website or modern app — all browsers released after 2020 support it, and the file size savings are significant. Choose JPG when you need maximum compatibility: email clients, older software, platforms that don't accept WebP. JPG is universally supported and produces smaller files than PNG, even if it's not as efficient as WebP.
If your workflow requires PNG output specifically, the most effective browser-based option is reducing the image dimensions. A 1200×900 PNG is roughly one-quarter the file size of a 2400×1800 PNG. Use our image resizer to scale down the dimensions first, then export from your workflow as PNG. For format-preserving PNG compression (which strips metadata and optimises encoding), desktop tools like ImageOptim (Mac) or Squoosh CLI (cross-platform) are more effective than any browser-based tool.