PNG Image Size Reducer

A PNG saved directly from a design tool, screenshot utility, or image editor often carries unnecessary overhead:

• Web performance. Every kilobyte adds to page load time. A 200KB logo that could be 80KB is 120KB of wasted bandwidth on every page load, every visitor.
• Core Web Vitals. Google's LCP (Largest Contentful Paint) is heavily influenced by image size. Unoptimized PNGs are a common reason sites score poorly on PageSpeed Insights.
• Email deliverability. Email providers limit attachment size. Compressed PNGs fit under those limits without sacrificing readability.
• Storage and bandwidth costs. At scale — a CDN serving millions of images — even small per-file savings compound into significant cost reductions.

PNG compression is inherently lossless — it can only reduce file size without removing image data. Here is what happens under the hood:

• Filter optimization. PNG encoders apply filters to each row of pixels before compression. Choosing the optimal filter per row can reduce the data that DEFLATE needs to compress.
• DEFLATE compression level. PNG uses DEFLATE internally. Many tools save with a default compression level that is fast but not optimal. A dedicated optimizer tries harder compression settings to squeeze out more bytes.
• Metadata removal. PNG files often contain embedded metadata (creation time, GPS coordinates, software name, color profiles). Stripping unnecessary chunks can save 5–20KB on a typical file.
• Color depth reduction (PNG-8). If an image uses fewer than 256 colors, it can be converted to an indexed 8-bit palette. PNG-8 files are dramatically smaller than 24-bit or 32-bit equivalents with no visible quality loss for eligible images.

The result is pixel-identical to the original. Open both files in an image viewer and you cannot tell them apart — the only difference is file size.

1. 1Go to pngmaker.com/compress-png.
2. 2Drop your PNG onto the upload area or click to browse.
3. 3The compressor runs entirely in your browser using WebAssembly — your file is never uploaded to a server.
4. 4See the before/after file size. Download the compressed PNG — it replaces the original at a fraction of the size.

Typical results: logos and icons with solid colors see 40–60% reduction. Screenshots and UI images see 20–40%. Complex photographic PNGs see 10–20% — though for those, converting to WebP is usually a better option.

PNG compression is lossless — ideal for logos, icons, text, and UI. But for photographic images, converting to WebP gives far larger savings:

• Compress PNG when: the image has transparency, contains text or UI elements, or must remain pixel-exact.
• Convert to WebP when: the image is a photograph, hero image, or background with no transparency requirements. WebP lossy compression can shrink a photographic PNG by 70–85%.