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Easily convert between PNG and JPG/JPEG image formats online. Supports single file processing to meet your image compatibility needs.
拖拽或点击上传 PNG / JPG 图片
PNG, JPG, JPEG
Max 1 MB • Max 5 files
Pixel to Millimeter Converter
Accurately calculate the physical dimensions between pixels and millimeters based on PPI density. Ideal for UI design and print typography.
PNG & GIF Converter
Convert between PNG and GIF image formats online. Supports large files and is ideal for web assets and animation processing.
PNG to BMP & BMP to PNG Converter
Convert PNG images to BMP format, or BMP to PNG, to easily meet your software compatibility and image editing needs.
Pixel to Centimeter Converter
Accurately convert pixel lengths to physical centimeter dimensions based on PPI (Pixels Per Inch). Ideal for UI design, print layouts, and screen adaptation.
Pixel to Millimeter Converter
Accurately calculate the physical dimensions between pixels and millimeters based on PPI density. Ideal for UI design and print typography.
PNG & GIF Converter
Convert between PNG and GIF image formats online. Supports large files and is ideal for web assets and animation processing.
PNG to BMP & BMP to PNG Converter
Convert PNG images to BMP format, or BMP to PNG, to easily meet your software compatibility and image editing needs.
Pixel to Centimeter Converter
Accurately convert pixel lengths to physical centimeter dimensions based on PPI (Pixels Per Inch). Ideal for UI design, print layouts, and screen adaptation.
PNG to TIFF & TIFF to PNG Converter
Convert between PNG and TIFF image formats online. Supports high-resolution images and large file processing.
When you need to convert a PNG image with a transparent background to a more universal JPG format to reduce file size, or convert a JPG image to a PNG format that supports transparency, this tool quickly solves the problem. PNG (Portable Network Graphics) is a raster image format that supports lossless data compression and transparency, while JPG (Joint Photographic Experts Group) is a commonly used image format that uses lossy compression to significantly reduce file size. The core function of this tool is to convert between these two mainstream image formats. Based on the original format you upload, it automatically converts it to the other format and provides a high-quality result file for download.
Q: What color will the transparent background become after converting PNG to JPG?
A: When converting PNG to JPG, the original transparent areas (Alpha channel) will be filled with a solid white background. The JPG format itself does not support transparency; this is determined by the format's characteristics.
Q: How do I convert JPG to PNG?
A: Simply upload your JPG or JPEG image, and the tool will automatically convert it to PNG format. This is one of the most common conversion needs.
Please ensure you upload a valid PNG, JPG, or JPEG image file. This tool currently only supports single file processing and does not support batch uploads at this time. Conversion speed is affected by file size and network conditions. For large files approaching the 1GB limit, please be patient while processing completes. Converted files are for download only and will not be stored on the server long-term, so please save them promptly.
Choosing between PNG and JPG depends on your core needs. PNG is ideal for scenarios requiring fine edges (like logos and icons), transparent backgrounds, or multiple edits without losing quality. JPG is better suited for photographs and images with rich gradients on the web, as its high compression rate can significantly reduce file size and improve loading speeds. A typical example: converting a product photo for web display (with no transparency needed) from a PNG (2MB) to a high-quality JPG (300KB) can reduce the file size by 85% with minimal visual loss. Conversely, if you need to convert a JPG icon with complex shadows into a PNG with a transparent background for design compositing, you can use this tool for the reverse operation.
