Compress PNG Without Losing Quality

4 min readUpdated April 2026Developer Tools

PNG files can be massive — especially screenshots and UI exports. This guide covers every method to dramatically reduce PNG file size with no visible quality difference.

Image Compressor

Compress PNG images free online. Supports lossless mode and WebP conversion. Nothing uploaded.

Open Image Compressor →

Why PNG files are large

PNG uses lossless compression — every pixel is preserved exactly. This is great for screenshots, logos, and UI assets where sharpness matters, but it results in large files. A single full-screen screenshot can be 2–5 MB.

Method 1 — Convert PNG to WebP (biggest savings)

WebP achieves 25–35% smaller files than PNG at equivalent visual quality, with support for transparency. For web use, WebP is almost always the better choice:

Open the image compressor
Upload your PNG
Set output format to WebP
Set quality to 85%
Download — typical savings: 40–60% vs original PNG

Browser support: WebP is supported in all modern browsers — Chrome, Firefox, Safari (since 2020), and Edge. Safe for production use.

Method 2 — Strip EXIF metadata

PNG files exported from design tools (Figma, Photoshop, Sketch) often contain embedded metadata — color profiles, creation dates, software info. This can add 10–50 KB to the file with zero visual impact. Stripping it is pure free savings.

In the tinybench.dev compressor, enable the "Strip metadata" toggle before downloading.

Method 3 — Reduce PNG colour depth

If your PNG uses only a small number of colours (logos, icons, simple graphics), converting from 24-bit to 8-bit (indexed colour, 256 colours max) drastically reduces size:

Original	Compressed	Method
Logo PNG (24-bit)	180 KB → 35 KB	Convert to 8-bit/256 colours
Screenshot (24-bit)	2.1 MB → 1.4 MB	Lossless compression only
Screenshot → WebP	2.1 MB → 380 KB	Convert to WebP at 85%

Method 4 — Resize before compressing

If you're displaying an image at 800px wide, there's no reason to serve a 2400px wide PNG. Resize first:

Upload to the image compressor
Enable Resize and set width to your display size
Keep aspect ratio locked
Then compress — combination of resize + compress typically reduces to 10–20% of original

Method 5 — Command line (pngquant / oxipng)

pngquant — lossy PNG compression (60–80% reduction)

npm install -g pngquant-bin

# Compress a single file
pngquant --quality=65-80 image.png

# Compress all PNGs in a folder
pngquant --quality=65-80 --ext .png --force *.png

oxipng — lossless PNG compression

# Install (Rust required)
cargo install oxipng

# Lossless compress
oxipng -o 4 --strip all image.png

Frequently asked questions

Can I compress a PNG with transparency?

Yes. PNG supports transparency (alpha channel). Our compressor preserves transparency when keeping PNG format. If you convert to WebP, transparency is also preserved. Only JPEG loses transparency (replaces with white).

What's the best format for logos and icons?

SVG is best for logos and icons — it's infinitely scalable and typically under 5 KB. If SVG isn't possible, use PNG for icons with transparency, or WebP for photos. Avoid JPEG for logos — compression artifacts on sharp edges look bad.

Will Google rank my site better if I compress images?

Yes. Google's Core Web Vitals (especially LCP — Largest Contentful Paint) directly measures image loading speed. Compressed images improve LCP scores, which is a ranking factor.

Try it free — no sign-up needed

Runs entirely in your browser. Nothing uploaded, nothing stored.