Quire

Free image tool

Convert PNG to JPG in your browser

JPG files of photos are much smaller than PNG files, and almost every app and website accepts them. This tool turns PNG images into JPG files on your device. Nothing is uploaded.

JPG cannot store transparency. Transparent areas are filled with white unless you pick another background color.

PNG to JPG

Your images are converted on this device and never uploaded.

PNG → JPG

Higher numbers give better quality and larger files. 90 keeps photos close to the original.

JPG has no transparency, so transparent and partly transparent areas are filled with this color. The default is white.

Metadata such as the location, camera and date is not copied into the new file. Colors are converted to sRGB.

Drop files here, or

PNG files. Up to 100 at a time, 50 MB each.

    How it works

    1. Set the JPG quality. 90 keeps photos close to the original.

    2. If your PNG has transparent areas, pick the color to fill them with. The default is white.

    3. Choose your PNG files, or drop them anywhere on the page. Conversion starts right away.

    4. Download each JPG, or all of them as one ZIP file.

    Your browser decodes each PNG in a background worker and draws it over the background color. MozJPEG, compiled to WebAssembly, then writes the JPG. MozJPEG makes smaller files than the browser's built-in JPG encoder at the same quality setting. The image is not sent anywhere.

    Questions

    What it does and what it does not

    Privacy, metadata, file limits and browser support.

    Are my images uploaded?

    No. The page and its encoders load from quireapps.com, and after that each image is read, converted and saved inside your browser tab. There is no analytics or tracking on this page. You can check this in your browser's developer tools, on the Network tab: converting an image makes no requests.

    What happens to transparent areas?

    JPG has no transparency, so the image is placed on a solid background first. The background is white unless you choose another color. Partly transparent pixels, such as soft edges and shadows, are blended with the background, so a logo with smooth edges on white looks the same as it did on a white page.

    Why is my JPG larger than the PNG, or blurry around text?

    JPG suits photos. Screenshots, logos and drawings with flat colors and sharp edges are often smaller as PNG, and JPG adds faint smudges around text and lines. For that kind of image, keep the PNG, or try the image compressor, which can also make WebP files.

    What happens to the metadata?

    It is not copied. The new file has no EXIF location, camera details or date taken. The EXIF orientation is applied to the pixels first, so the image keeps the way it was displayed. Colors are converted to sRGB and no color profile is written. To remove metadata without converting, use the EXIF remover.

    Are there limits?

    Each file can be up to 50 MB and 100 megapixels, and the list holds up to 100 files at a time. Safari on iPhone and iPad limits images to about 16.7 megapixels for this kind of processing, so larger images can fail there. Files are converted one at a time.

    Which browsers does it work in?

    It is tested in Chrome. Current versions of Edge, Firefox and Safari should also work, but they have had less testing here.

    Is it free?

    Yes. There is no account, no sign-up, no watermark and no daily limit.