PNG Optimization Best Practices

When to Use PNG

• Logos, UI icons, screenshots, and graphics with sharp edges and text.
• Assets requiring alpha transparency (semi‑transparent shadows, overlays).
• Avoid for photographs; prefer WebP/AVIF/JPEG.

Reduce Colors with Palettes

Indexed color (palette) can dramatically shrink file size for graphics with limited colors. Aim for the smallest palette that maintains visual fidelity. This remains lossless within the selected palette.

Strip Unnecessary Metadata

Remove ancillary chunks (text, time, thumbnails) unless required. This reduces bytes without changing the image.

Minimize Dimensions

Export at the exact display size. Avoid shipping oversized assets—especially for UI elements.

Manage Transparency Thoughtfully

• Use alpha only when necessary. Solid backgrounds compress smaller.
• Prefer 8‑bit alpha over 16‑bit when possible.

Automate in Your Workflow

Integrate a batch compressor into CI or build steps to avoid regressions. See our Batch Compression Guide.

Related Guides

Learn the fundamentals in How PNG Compression Worksand understand format trade‑offs in Lossy vs Lossless Compression.