PNG files from design tools and screenshots are often much larger than they need to be for a photo-style pin, and some upload forms, email tools and older apps still do not accept WebP. This converter changes the format of one image or a whole batch at once: to JPG for the smallest photo files, to PNG for lossless graphics, or to WebP for modern websites.
JPG cannot store transparency, so the tool detects transparent images and fills those areas with a color you choose instead of leaving them black. Everything happens in your browser, so the images never leave your device.
Which format to use for pins
For pins made from photos, JPG gives the smallest file at the same visual quality. For pins made mostly of flat color, sharp text and simple shapes, PNG keeps every edge crisp, though the file is bigger. Pinterest accepts both. WebP is a good choice for images on your own blog if your platform supports it.
If you also want to scale images down to a pin width, use the image compressor, which resizes and compresses in one pass.
What happens to transparent backgrounds
A logo or cut-out product saved as PNG usually has a transparent background. Converting it to JPG needs a solid color behind it, and many converters use black. This tool uses white by default and lets you pick any color, for example your brand color, so the result looks intentional.
When converting to PNG or WebP you can keep the transparency, or switch it off to flatten the image onto the background color.