PixelUlti

PixelUlti, with its unique and intelligent algorithm, ensures that images are compressed to the most reasonable size without compromising their quality, while also converting them into various common formats, making them suitable for use in a wide range of applications.

Compressing PNG and Converting to Other Formats

Under normal circumstances, converting PNG to JPEG may result in significant data loss, leading to color distortion or a decline in image quality. However, pixelUlti's compression feature ensures high-density compression while fully preserving the original colors of the image. After compression, we convert the image into three common formats, providing users with more options.

Original PNG
This is the original PNG image, which has a size of 4.5MB
PNG
After compression, keeping the original format, its size is only 1.1MB
JPEG
After converting to JPEG format, its size is only 530KB
WEBP
After converting to WEBP format, its size is only 276KB

When converting PNG to JPEG format, there is often a significant loss of color.

Carefully examine the original PNG image above. After compression with PixelUlti, we output three common image formats. While their file sizes have significantly reduced, visually, we can hardly detect any imperfections. In reality, there are substantial differences in pixel arrangement and color space. This mainly occurs when converting image formats, such as when converting a PNG image to JPEG.

PNG is a lossless compression format that typically uses the RGBA color model (including the transparency Alpha channel), while JPEG is a lossy compression format that utilizes the YCbCr color space and 4:2:0 chroma subsampling. Different image formats handle colors differently, and converting between them can result in subtle color changes, causing the JPEG image to appear different from the original PNG.

PixelUlti utilizes proprietary technology for image compression, with the biggest challenge occurring during PNG to JPEG conversion. We’ve made every effort to restore the image to its fullest, particularly in handling red and yellow pixels.

Compressing JPEG images

When compressing JPEG images, the situation is different

When we simply compress an existing JPEG image, the compression algorithm works with the JPEG's YCbCr color space data, which typically preserves more of the original structure. Since the image is already in JPEG format, the compression has a minimal impact on overall color and quality. As a result, the output image is almost identical to the original JPEG, especially when using high-quality settings.

What's even more important is that we use a custom quantization table, finely optimizing JPEG compression. This means that even when we apply significant compression to a JPEG image, you won't notice any difference.

Original JPEG
This is the original JPEG image, which has a size of 2.3MB
JPEG
After compression, keeping the original format, its size is only 534KB
Original JPEG
This is the original JPEG image, which has a size of 5.3MB
JPEG
After compression, keeping the original format, its size is only 889KB

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High-Quality PNG, JPEG & WEBP Compression Made Simple

PixelUlti

Compressing PNG and Converting to Other Formats

When converting PNG to JPEG format, there is often a significant loss of color.

Compressing JPEG images

Compress PNG, JPEG, WebP Online