JPEG or PNG? How to Choose the Right Image Format
Quick summary: Use JPEG for photographs and complex images where small file size matters more than pixel-perfect accuracy — it compresses files significantly with minimal visible quality loss. Use PNG when you need transparency, sharp text or line art, or lossless quality — screenshots, logos, diagrams, and graphics with flat colors all look better and stay crisp as PNG.
JPEG and PNG solve different problems: JPEG trades a small amount of quality for a much smaller file, while PNG preserves every pixel exactly at the cost of a larger file. Picking the wrong one either bloats your page load times or makes your images look worse than they need to. You can also upload any PDF containing images to our free AI PDF reader to extract and review its content.
JPEG vs PNG: quick comparison
| JPEG | PNG | |
|---|---|---|
| Compression | Lossy (some data discarded) | Lossless (no data lost) |
| File size | Smaller, especially for photos | Larger, especially for photos |
| Transparency | Not supported | Fully supported (alpha channel) |
| Best for | Photographs, complex images | Screenshots, logos, text, graphics |
| Color banding on gradients | Rare, smooth | Can occur with limited color palettes |
| Repeated editing/saving | Quality degrades each save | No degradation |
| Text and sharp edges | Can look blurry or show artifacts | Stays crisp |
When to use JPEG
Choose JPEG when:
- The image is a photograph — cameras and phones already shoot in JPEG for a reason: photos have complex, gradual color variation that compresses well without visible loss.
- File size matters most — for web pages, email attachments, or anywhere loading speed or storage space is a priority.
- You don’t need transparency — JPEG always has a solid background; there’s no way to make part of the image see-through.
- The image won’t be re-edited many times — each time you save a JPEG, it recompresses and loses a little more quality (this is called “generation loss”). Fine for a final export, risky for a working file you’ll open and resave repeatedly.
When to use PNG
Choose PNG when:
- You need transparency — logos, icons, and overlays that need to sit on top of other content (a colored background, another photo) require PNG’s alpha channel.
- The image has sharp edges or text — screenshots, diagrams, charts, and anything with flat colors and hard lines compress poorly in JPEG (visible “fuzzy” artifacts around edges) but stay perfectly crisp in PNG.
- You’re editing the file repeatedly — since PNG is lossless, saving it multiple times during editing doesn’t degrade quality the way JPEG does.
- Color accuracy is critical — product photography for e-commerce, medical or scientific images, or anything where exact colors matter benefits from PNG’s lossless compression.
File size: how much bigger is PNG?
For a typical photograph, PNG files run 2–5x larger than an equivalent JPEG at visually similar quality — this is the main tradeoff. For simple graphics with few colors (a logo, an icon, a screenshot of a mostly-white document), the gap narrows significantly, and PNG can sometimes even be smaller than JPEG, since PNG’s lossless compression is very efficient on images with large flat-color areas.
Does JPEG or PNG have better quality?
Neither is universally “better quality” — it depends on the source image:
- For photographs, a JPEG saved at high quality (90%+) is visually indistinguishable from the original in most viewing conditions, despite being lossy. PNG of the same photo looks identical but at several times the file size — quality is the same to the eye, so JPEG wins on efficiency.
- For graphics, text, and screenshots, JPEG’s compression algorithm — designed for photographic gradients — introduces visible blur and color artifacts around sharp edges. PNG preserves these perfectly. Here PNG has a real, visible quality advantage.
JPEG or PNG for specific use cases
| Use case | Recommended format |
|---|---|
| Product photos for a website | JPEG |
| Logo with transparent background | PNG |
| Screenshot of software or a document | PNG |
| Social media photo post | JPEG |
| Icon or UI graphic | PNG |
| Scanned document page | PNG (for text clarity) or JPEG (if file size matters more) |
| Email newsletter photo | JPEG |
| Chart or diagram | PNG |
| Print-ready photo | JPEG (at maximum quality) or TIFF for professional printing |
What are the disadvantages of PNG?
- Larger file sizes, especially for photographs — this can slow down web page load times if used indiscriminately.
- No native support for lossy compression — you can’t trade quality for a smaller file the way JPEG allows; PNG is always lossless (though tools can reduce the color palette to shrink it, at some quality cost).
- Not ideal for very large, detailed photographs where file size matters more than pixel-perfect accuracy.
What are the disadvantages of JPEG?
- No transparency support — every JPEG has a solid rectangular background.
- Generation loss — repeatedly opening, editing, and re-saving a JPEG gradually degrades quality as compression artifacts compound.
- Compression artifacts on sharp edges — text, line art, and hard color transitions can look blurry or show visible blocky patterns (“JPEG artifacts”), especially at lower quality settings.
How to convert between JPEG and PNG (including from a PDF)
If your image needs to switch formats, or you need to pull an image out of a PDF page first:
- PDF page to JPEG: see how to convert a PDF to JPG for free — best when the exported image is a photo or you want the smallest file size.
- PDF page to PNG: see how to convert a PDF to PNG for free — best when the page has text, diagrams, or you need a transparent background.
Once you have either format on its own, converting JPEG ↔ PNG is a one-click export in Preview (Mac), Paint (Windows), or any free online image converter — no PDF involved at that point.
Frequently Asked Questions (FAQ)
Which is better quality, JPEG or PNG?
For photographs, a high-quality JPEG looks visually identical to PNG despite being lossy — so “better” comes down to file size efficiency, where JPEG wins. For graphics, screenshots, and text, PNG has genuinely better visible quality because it doesn’t introduce compression artifacts on sharp edges.
Are JPEGs better than PNG?
Neither is better in every situation — JPEG is better for photographic content where small file size matters; PNG is better for graphics, transparency, and lossless editing. Choosing the wrong one for the content type is the actual mistake, not picking “the worse format.”
Should I save photos as JPEG or PNG?
Save photos as JPEG in almost every case — the file size savings are substantial and the quality difference is imperceptible at high JPEG quality settings (85–95%). Reserve PNG for photos only when you specifically need transparency or lossless quality for further editing.
Can I convert a JPEG to PNG without losing quality?
Yes — converting from JPEG to PNG doesn’t lose any additional quality beyond what the JPEG already lost when it was first compressed. However, it also doesn’t recover any quality lost in the original JPEG compression, and the resulting PNG file will be larger without becoming any sharper.
Does PNG support animation like GIF?
Standard PNG does not support animation. There’s an extension called APNG (Animated PNG) that does, but it has limited support in some tools and image editors compared to GIF or modern video-based formats. For a single still image with transparency, standard PNG is the right choice.
What format should scanned PDF pages be — JPEG or PNG?
If the scanned page is mostly text, PNG keeps the text edges sharp and readable. If the scanned page is a photograph or has continuous-tone images (like a magazine page), JPEG keeps the file size manageable with little visible quality loss. See how to compress a PDF for free if the resulting file is too large either way.
Related guides
- How to OCR a PDF for free — make a scanned image-based PDF searchable
- How to combine images into one PDF for free — merge JPEGs or PNGs into a single PDF
- What is a PDF? — how the PDF format compares to image formats