CompressorPNG
Reduce PNG file sizes using optimized lossless compression without any quality degradation. PNG files can become large — especially screenshots, graphics exported from design tools, and high-resolution artwork. This tool recompresses PNG files using optimized compression algorithms that find a more efficient encoding of the same pixel data, producing smaller files that are visually identical to the originals. Perfect for optimizing web assets, reducing storage, and speeding up page loads.
Use PNG Tool in Seconds
PNG Compressor
Compress PNG files with lossless-friendly output.
How To Use PNG Compressor
- Upload the PNG file you want to compress by clicking the upload button.
- The tool applies lossless compression optimization to the PNG file.
- The compressed PNG is generated and available for download.
- Compare the file sizes before and after to see the size reduction achieved.
- Download the optimized PNG — it is visually identical to the original but smaller in storage size.
Frequently Asked Questions
Is PNG compression lossless?
Standard PNG compression is lossless, meaning the pixel data is preserved exactly and the image looks identical before and after compression. The size reduction comes from finding a more efficient mathematical encoding of the same pixel values, not from removing or approximating any visual information. Some PNG optimizers also offer lossy compression by reducing the color palette, which can achieve much larger reductions at the cost of some color accuracy.
How much can lossless compression reduce a PNG file?
Lossless PNG compression typically reduces file size by 10–30% compared to PNGs saved by standard applications. The actual reduction depends on the image content — PNGs with large areas of flat color, simple gradients, or repeated patterns compress very well. Highly detailed or noisy images (like complex photographs saved as PNG) have less redundant data and compress less. Previously optimized PNGs may see minimal additional reduction.
What is the difference between this and the general Image Compressor?
The PNG Compressor is specifically optimized for the PNG format and always uses lossless compression to preserve exact pixel data. The general Image Compressor may handle multiple formats and may apply lossy compression to achieve larger size reductions. Use the PNG Compressor when exact quality preservation is essential — for logos, graphics, screenshots, and design assets. Use the general compressor for photos where some quality reduction is acceptable.
Will compressing a PNG multiple times keep reducing its size?
After the first optimization pass, running lossless compression again on an already-optimized PNG typically produces no further reduction (or only a negligible one). The compression algorithm has already found the most efficient encoding, so repeated passes do not yield additional gains. If you want to reduce further, you would need to use lossy techniques like palette reduction, which do sacrifice some color quality.
Should I use PNG or WEBP for web images?
WEBP often produces smaller files than PNG for the same visual quality and supports transparency like PNG does, making it an excellent choice for modern websites. However, PNG remains the right choice when you need maximum compatibility across all software (not just modern browsers), when you are providing source assets to clients or contributors, or when you need images for non-web use (design software, documents, archiving). For web-only delivery, WEBP is the better format.
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