What Is PNG to JPG Converter?
PNG to JPG Converter transforms PNG images into JPG format with adjustable quality. PNGs are lossless and often produce large files — converting to JPG can reduce file size by 60–90%, making images faster to upload, email, and load on websites.
How to Use This Tool
Upload one or more PNG files, adjust the JPG quality slider to balance file size against visual fidelity, and click convert. The tool processes each image in your browser and provides the JPG results for download. Your images are never uploaded to a server.
Why Use PNG to JPG Converter?
If you’re preparing images for a website, email campaign, or social media, JPGs load faster and take less bandwidth than PNGs. This tool converts them privately in your browser with no file-size limits, no watermarks, and no account required. For a detailed walkthrough, see our step-by-step guide.
If you're deciding between formats rather than committing to JPEG, the File Size Estimator predicts size across JPEG, PNG, WebP, and AVIF at any pixel dimensions and quality.
Common Use Cases
Shrinking a screenshot collection before attaching it to an email or pull request, where PNG file sizes can run 10x larger than a visually-equivalent JPG. Preparing marketing imagery for a CMS that rejects PNGs over a certain size limit. Converting photography exported in PNG by mistake (some camera-tethering apps and screen-capture extensions default to PNG even for photos, where JPG is the right format).
Producing email-safe images where some older clients render PNG transparency as a black background — flattening to JPG sidesteps the issue. Preparing thumbnails for a gallery where every byte of bandwidth matters. Batch-converting an archive of PNGs to a uniform JPG output with a consistent quality setting, so file sizes across the archive become predictable.
How We Compare
macOS Preview, Windows Paint, and the GIMP can convert PNG to JPG individually. They work fine for one file at a time but get tedious for a folder of screenshots. ImageMagick and sips on the command line are great for power users; not everyone wants to install them or remember the flags. Online converters from CloudConvert and similar work but upload your images, which is a problem when the screenshot contains an internal dashboard or unreleased UI.
This tool runs the conversion in your browser, supports batch input, and lets you choose the quality level so you can balance size against fidelity. The PNG's alpha channel is composited against a configurable background color (white by default) since JPG has no transparency support. For the reverse direction or other format pairs, see SVG to PNG or WebP to JPG.
One thing the converter doesn't do: try to fake transparency in JPG output, since the format genuinely has no alpha channel. Pixels that were transparent in the source are flattened against the chosen background color. If you need transparency on the way out, leave the file as PNG or convert to WebP instead, which supports alpha.
Frequently Asked Questions
Built by Derek Giordano · Part of Ultimate Design Tools