JPEG vs PNG: The Complete Comparison
JPEG and PNG are the two most common image formats. Here's exactly when to use each, what the tradeoffs are, and how file size compares.
JPEG and PNG are the two formats most people use for everything — and most people use them interchangeably without thinking about it. That's usually fine, but it leads to large PNG files where a JPEG would do the job, and blurry JPEGs where a PNG would have looked sharper.
Here's a clear breakdown so you can make the right choice every time.
The Fundamental Difference
JPEG uses lossy compression. When you save a JPEG, the encoder analyzes the image and discards visual information that's hard for the human eye to notice — subtle color variations, fine texture, detail in shadows. The result is a much smaller file, but some data is permanently gone.
PNG uses lossless compression of decoded pixels. This does not make an exported PNG byte-identical to its source or restore detail already lost in a JPEG. Metadata and color handling can also change during conversion.
This one distinction explains almost every other difference between the two formats.
When JPEG Wins
Photographs. JPEG can produce compact photo files by discarding some image information. The useful trade-off depends on the photo, encoder and viewing size; inspect the output rather than assuming a percentage saving or invisible change.
Large file sizes. If storage or bandwidth matters, JPEG is almost always smaller for photographic content.
Sharing and social media. JPEG is widely supported. Check the destination’s accepted formats and verify the downloaded image before sending a batch.
When PNG Wins
Screenshots. Screenshots contain sharp text, hard edges, and flat areas of color — exactly what JPEG compresses poorly. JPEG artifacts become glaringly obvious on text. PNG keeps every pixel perfect.
Logos and graphics. A logo typically has sharp edges and flat color fills. JPEG smears those edges with compression artifacts. PNG keeps them crisp.
Transparent backgrounds. JPEG does not support transparency. Any transparent area in your source image becomes solid white in a JPEG. PNG supports full alpha transparency — essential for logos, icons, and any image that needs to sit over a colored background.
Images you'll edit multiple times. Each time you save a JPEG, the lossy compression runs again, and the quality degrades a little more. This is called "generation loss." If you're working on an image iteratively, keep it as PNG (or another lossless format) and only convert to JPEG for the final export.
File Size Comparison
Compare files encoded from the same source, at the same dimensions, with the actual settings you intend to use. Content and encoder settings determine the size; there is no guaranteed ranking or fixed saving. Inspect fine text and edges as well as the file size.
Side-by-Side Decision Guide
| Situation | Use |
|---|---|
| Photo from a camera or phone | JPEG |
| Screenshot | PNG |
| Logo or icon | PNG or SVG |
| Graphic with transparent background | PNG or WebP |
| Web image where loading speed matters | WebP (or JPEG if WebP isn't supported) |
| Image you'll edit again | PNG |
| Final export for sharing or uploading | JPEG (for photos), PNG (for graphics) |
Converting Between JPEG and PNG
Need to switch formats?
- JPG to PNG — convert to lossless for editing or transparency
- PNG to JPG — reduce file size for photos
- JPG to WebP — modern web format, smaller than JPEG
- PNG to WebP — smaller than PNG, keeps transparency
All conversions run in your browser with no file upload.
Frequently Asked Questions
Does converting PNG to JPEG lose quality? Only if the source is a photo. Converting a photograph from PNG to JPEG applies lossy compression — the result looks the same but some data is discarded. Converting a graphic like a screenshot or logo loses visible quality because JPEG handles sharp edges and text poorly.
Can I recover a JPEG back to its original quality by saving as PNG? No. Converting a JPEG to PNG makes a lossless copy of the already-compressed image. The lost data from the original JPEG compression is gone permanently.
Is PNG always better quality than JPEG? Lossless encoding and perceived quality are different. JPEG may be suitable for a final photo export, while PNG is useful when preserving the decoded pixels matters. Compare at the display size and keep the original.
Sources and maintenance
References checked on 2026-10-30. Format capabilities and app support are separate from this site’s output; check the tool’s current options and limitations.