A smaller file is useful only if the next app can open it and the image still does its job. Start with the destination’s requirements, then compare a few exports instead of treating one format as the winner for every picture.
Choose JPEG for straightforward photo sharing
JPEG is a practical starting point for photographs and destinations that expect familiar image files. Its lossy compression trades some detail for smaller files. It does not preserve transparency.
In this tool, start at 1600 pixels and 80% quality, then inspect the output. A listing photo may tolerate a smaller copy than an image with tiny labels. JPEG transparency is filled with white here.
Try WebP when the destination accepts it
WebP supports transparency and both lossy and lossless compression. It is worth comparing for a website or upload form that explicitly accepts it. Compatibility with the receiving app matters more than the filename alone.
Export the same source at the same maximum size in JPEG and WebP. Compare the preview, actual file sizes, and the destination’s acceptance. Keep the version that meets the requirement with acceptable detail.
Keep PNG for transparency and crisp graphics
PNG uses lossless compression and supports transparency. It is often useful for graphics with sharp edges or transparent areas. A photograph exported as PNG can be larger than an acceptable JPEG copy.
Photo Resizer hides the quality slider for PNG because its JPEG/WebP quality control does not set PNG quality. Resizing a PNG still changes its pixel dimensions; “lossless format” does not mean an edited output is identical to the original.
A quick comparison workflow
Choose one source and keep the maximum longest side unchanged. Export each accepted format and record its displayed size. Inspect the part of the image where losing detail would matter most.
The tool shows the format actually returned by the browser. If the requested export format is unavailable, the browser may return PNG. A successful download alone does not establish that the format you selected was supported.
Know when this tool is the wrong fit
Use an image editor with appropriate controls for print production, exact color profiles, animation, or extensive editing. This browser tool is intended for a still image and everyday sharing.
For the complete phone workflow, read the photo-size guide in the journal. If you are sharing a web address rather than an image, the free QR Generator may be the more useful starting point.
Sources & review notes
Sources checked October 5, 2026. Features can change; use the original documentation for account-specific details.
Prepared for The Tupy Show with AI-assisted research and drafting. These are practical guides, not claims of firsthand product testing. Send a correction or suggest a topic.