PNG Compressor
Quickly compress all your PNG images at once — lossless, free, and instant
or drag and drop your image here
Supports PNG
PNG Compression for Every Purpose
Web Development
- Reduce PNG file sizes for faster page loading
- Improve Core Web Vitals with optimized PNG assets
- Compress transparent PNGs for icons and logos
- Lower bandwidth costs with smaller PNG images
Design & Graphics
- Compress PNG exports from Figma, Sketch, or Photoshop
- Optimize PNG assets for UI kits and design systems
- Reduce file size of transparent overlays and textures
- Prepare lightweight PNGs for client deliverables
Screenshots & Documents
- Compress screenshots for documentation and tutorials
- Reduce PNG size for email attachments
- Optimize diagrams and charts for presentations
- Shrink annotated screenshots for bug reports
How to Compress PNG Images Online
Upload PNG Images
Drag & drop or select PNG images to compress.
Compress
Our tool applies lossless compression to reduce file size while preserving transparency and quality.
Download Compressed Files
Save your optimized PNG images instantly. Free, no registration required.
Professional PNG Compression Made Simple
PicsSizer's PNG Compressor uses advanced algorithms to reduce PNG file sizes while maintaining visual quality. All processing happens directly in your browser — your images are never uploaded to our servers. Whether you need to optimize PNGs for web performance, reduce storage space, or prepare files for sharing, our tool delivers fast, reliable results.
How PNG Compression Works
PNG compression works by analyzing image data and removing redundant information without discarding any visual detail. Unlike lossy formats such as JPEG, lossless PNG compression preserves every pixel perfectly — the decompressed image is bit-for-bit identical to the original. Our tool applies DEFLATE-based optimization and palette reduction to achieve compression rates of 20% to 90% depending on the source image.
Preserving Transparency in Compressed PNGs
PNG is the go-to format for images that require transparency — logos, icons, overlays, and UI elements. Our compressor fully preserves the alpha channel during compression, so transparent areas remain pixel-perfect. You can safely compress transparent PNGs without worrying about fringing, halo artifacts, or lost alpha data.
Lossless vs Lossy Compression
Lossless compression reduces file size without any quality degradation — ideal for PNGs used in professional design, documentation, and web assets where every detail matters. Lossy compression, used by formats like JPEG, achieves smaller files by permanently discarding some image data. For PNG images, lossless compression is typically the best choice because it maintains the format's strengths: sharp edges, exact colors, and full transparency support.
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Frequently Asked Questions About PNG Compression
Get answers to common questions about our free PNG compression tool