Compress PNG Images Online
Shrink PNG image file sizes by up to 80% while retaining transparency and sharp pixel quality. Fast, private, browser-based.
Drop your PNG here
Supports transparent .png
Less colors equal significantly smaller files.
Results Preview
Slash PNG Sizes without Losing Crispness
Unoptimized PNG files can result in huge asset folders and slow-loading websites. Our advanced PNG compressor utilizes the FFmpeg WASM engine directly in your browser to carefully quantize image colors, collapsing the file size while flawlessly preserving alpha transparency and crisp edges.
Engineered for Efficiency
Color Limiting
Most images don't need 16 million colors. By reducing your image palette to 256 colors, you immediately shed megabytes of unnecessary data.
Smart Dithering
To combat color banding when colors are reduced, we apply a subtle dither algorithm that tricks the eye into seeing smooth gradients.
How this Compress PNG Online works
This tool allows users to compress PNG images by reducing the number of colors used. Leveraging client-side processing via FFmpeg WASM, it enables selection of the maximum number of colors, optimizing file size without significant visual degradation. Users can upload images via drag-and-drop or file selection, monitor conversion progress, and download the optimized PNG. This ensures privacy and speed as all operations occur locally within the browser.
The compression works by re-quantizing the image's color palette. Instead of preserving all original colors, it identifies the most frequently used ones up to the user-defined limit and maps the image to this reduced palette. This significantly decreases the data required to store the image information, resulting in smaller file sizes. Error handling and previews are provided for a seamless user experience.
Ideal for web developers needing to optimize image assets for faster page load times, designers managing large image libraries, or individuals looking to save storage space, this tool offers an efficient and secure way to handle PNG compression without relying on external servers.
How to Use
Upload Your PNG
Drag and drop or select your image. We perfectly maintain transparency.
Select Max Colors
Limit the color palette (e.g. 256 or 128 colors) to massively reduce size.
Compress & Save
Click compress to process your file locally via WebAssembly.
Example Usage
Reduce massive transparent PNG files rapidly without noticeable quality loss using 256-color quantization.
Frequently Asked Questions
How does PNG compression work?
Does it keep my transparent background?
Is my data private?
Why not use JPG?
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The Compress PNG Online is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.
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