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.
Common Use Cases
Shrinking photos that were saved as PNG (phone screenshots of photos, exports from editing apps), where PNG can be several times larger than a visually-equivalent JPG. Screenshots of interfaces and text usually shrink little, and stay sharper as PNG. 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.
Worked example: when converting saves space, and when it doesn't
We converted two PNGs in Chromium exactly the way this tool does (draw onto a white canvas, then encode with the browser's JPEG encoder) at three quality settings:
| Image | PNG | JPG at 92 (default) | JPG at 80 | JPG at 60 |
|---|---|---|---|---|
| Photo saved as PNG (1280×2369) | 3,162 KB | 695 KB (−78%) | 538 KB (−83%) | 325 KB (−90%) |
| UI screenshot (1280×800) | 68 KB | 68 KB (−1%) | 47 KB (−31%) | 35 KB (−49%) |
Photos shrink dramatically because JPEG is built for continuous tone. A screenshot of an interface barely shrinks at the default quality, because PNG already compresses flat colour and sharp edges well; lowering quality saves more but adds visible ringing around text. Rule of thumb: convert photos, keep screenshots and anything with text or transparency as PNG (or try WebP). JPG has no alpha channel, so transparent areas become white.
Measured October 11, 2026 in Chromium (Playwright) with canvas.toBlob('image/jpeg', quality). Photo: "Tour Eiffel Wikimedia Commons.jpg" from Wikimedia Commons, decoded to PNG; screenshot: this page at 1280×800.
Related tools
- 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.
Frequently Asked Questions
Built by Derek Giordano · Part of Ultimate Design Tools