AmberPic

PNG Compressor

PNG Compressor by AmberPic processes your images directly in your browser. Lossy and lossless PNG compression with smart palette detection. No upload, no signup, instant results. Works with every modern format and produces output optimized for web, email, or social media.

Last updated:

Drop images here or click to upload

JPG, PNG, WebP, AVIF, HEIC — Up to 100 files, 100MB each · Or paste with Ctrl+V

Features

  • ✓ Smart palette detection for maximum PNG compression
  • ✓ Lossless mode preserves every pixel exactly
  • ✓ Adjustable quality for lossy PNG (rare, but useful for huge files)
  • ✓ Transparency (alpha channel) fully preserved
  • ✓ Batch compress multiple PNGs at once

How to use

  1. 1
    Upload your PNG files Drag and drop one or multiple PNG images. All processing happens in your browser.
  2. 2
    Choose compression level Pick lossless (no quality loss, smaller reduction) or lossy (smaller files, slight quality loss). The smart palette option reduces unique colors to shrink files dramatically.
  3. 3
    Preview the result See the size reduction and visual quality before downloading. The optimizer shows you exactly how much you'll save.
  4. 4
    Download compressed PNGs Download individually or get all compressed files as a ZIP archive.

Common use cases

  • → Optimize screenshots for documentation and tutorials
  • → Compress UI assets for web and mobile apps
  • → Reduce size of icons, logos, and graphics
  • → Optimize PNG photos for web (though JPG is usually better for photos)

Frequently asked questions

Will transparency be preserved?

Yes. Our PNG compressor fully preserves the alpha channel (transparency). Compressed PNGs look identical to the originals with smaller file sizes.

How does smart palette detection work?

Many PNGs use thousands of colors that are imperceptibly similar. Our optimizer quantizes the palette to the most common colors while preserving visual fidelity, often reducing file size by 50-70%.

Is PNG compression lossless?

By default, yes. Lossless PNG compression finds more efficient ways to encode the same pixels. For larger reductions, enable lossy mode which removes nearly-invisible color data.

Related tools

Image Compressor

Compress JPG, PNG, WebP, AVIF and HEIC images without losing quality. Batch up to 100 files.

JPG Compressor

MozJPEG-powered compression with quality and chroma subsampling control.

PNG to JPG

Convert PNG images to JPG with background color picker for transparency.

Image Resizer

Resize images by pixels, percentage, or preset dimensions. Lock aspect ratio.

Privacy guaranteed

  • ✓ Zero uploads — your files never leave your device
  • ✓ No signup, no watermark, no limits
  • ✓ Works offline once loaded