JPEG vs PNG: Which Image Format Should You Actually Use?

Use JPEG for photographs and PNG for graphics with sharp edges, text, or transparency. That is the whole answer in one line. JPEG throws away detail to make photos small, and PNG keeps every pixel exact, which is why a screenshot of a menu looks crisp as PNG and blurry as JPEG.

JPEG vs PNG: the one-sentence answer

JPEG (also written JPG, same thing) is a lossy photo format. PNG is a lossless format built for logos, icons, screenshots, and anything that needs a see-through background.

If your image is a real-world photo with smooth color gradients, JPEG wins on file size and looks fine. If your image has hard lines, flat color blocks, text, or transparency, PNG keeps it clean where JPEG smears it. That single distinction settles most of the choices you will ever make.

How JPEG compression works (and where it hurts)

JPEG uses lossy compression. It breaks the image into 8x8 pixel blocks and discards the fine detail your eye is least likely to notice, then saves an approximation. You pick a quality level from 0 to 100, and lower numbers throw away more.

This is brilliant for photos. A 4000x3000 camera photo that would be 30 MB uncompressed can drop to 2 MB at quality 80 and still look identical on screen. The trade is that JPEG is lossy, so every time you re-save a JPEG, it re-compresses and loses a little more. Edit and export the same JPEG ten times and you will see it soften.

Where it hurts: sharp edges. Around black text on a white background, or the border of a logo, JPEG leaves faint gray smudges called compression artifacts. Zoom into any JPEG screenshot with text and you will spot the fuzz. That fuzz is the sound of lossy compression guessing.

How PNG works: lossless quality and transparency

PNG is lossless. It compresses using a method (DEFLATE, the same idea behind ZIP) that shrinks the file without deleting a single pixel. Open a PNG, edit it, save it again, and the quality never degrades. What you put in is exactly what comes out.

PNG also supports an alpha channel, which is real transparency. A logo saved as PNG can sit on any background color and the corners stay see-through. JPEG has no transparency at all, so a JPEG logo always carries a solid rectangle behind it, usually white.

The catch is size. Because PNG keeps everything, a photo saved as PNG can be five to ten times larger than the same photo as JPEG. PNG loves flat color and repetition, so it shines on graphics and struggles on the busy detail of a photograph.

Difference between JPEG and PNG on file size

Here is the file-size difference between JPEG and PNG in plain numbers. Take one photo and one screenshot, save each both ways:

• A 12-megapixel photo: roughly 3 MB as JPEG (quality 80), roughly 20 MB as PNG. JPEG wins by a wide margin.
• A UI screenshot with text and flat panels: roughly 250 KB as PNG, roughly 400 KB as JPEG, and the JPEG looks worse. PNG wins on both size and quality.

That flip is the whole game. PNG vs JPG is not about which format is “better,” it is about matching the format to the content. Photos compress well with lossy JPEG. Flat graphics compress well with lossless PNG and stay sharp doing it. If you want the deeper mechanics behind this trade, see lossy vs lossless compression.

When to use PNG vs when to use JPG

Reach for JPG when:

• The image is a photograph or has smooth color gradients (sunsets, skin, landscapes).
• File size matters more than pixel-perfect edges (product photos, blog hero images, email).
• The image has no transparency.

When to use PNG instead:

• Logos, icons, and illustrations with flat color and hard edges.
• Screenshots, especially anything with text or UI.
• Any image that needs a transparent background.
• A master file you will keep editing and re-exporting (lossless means no generation loss).

One practical rule: if you are unsure and the image has text in it, choose PNG. Text is exactly where JPEG artifacts show up worst.

What about WebP and AVIF?

JPEG and PNG are old (JPEG is from 1992, PNG from 1996). Modern formats do both jobs better. WebP handles photos and transparency in one format and typically lands 25 to 35 percent smaller than JPEG at the same quality. AVIF goes further, often beating JPEG by half the size, and it supports transparency too.

For the web, WebP is now supported in every current browser, and AVIF is close behind. If you control the pipeline, exporting WebP or AVIF with a JPEG or PNG fallback gives you smaller files with no visible quality drop. We cover the head-to-head in webp vs jpeg, and which one to ship in best image format for web.

Quick reference table

Situation	Best format
Photograph	JPEG (or WebP/AVIF)
Logo or icon	PNG (or SVG if it is a vector)
Screenshot with text	PNG
Needs transparency	PNG, WebP, or AVIF
Smallest possible web file	AVIF, then WebP
Master file for re-editing	PNG (lossless)

Shrink either format without losing quality

Picking the right format is half the win. The other half is compression. Most PNGs carry unused metadata and can lose 40 to 60 percent of their weight with no visible change, and most JPEGs are exported at quality 100 when quality 80 looks the same at a fraction of the size.

You can do both without installing anything. Drop your file into our image compressor, and it strips the waste and re-encodes at a sensible quality. Run a PNG logo and a JPEG photo through it and watch the kilobytes disappear.

FAQ

Is JPG the same as JPEG? Yes. JPG and JPEG are the same format with two spellings. The .jpg extension exists because older Windows versions limited file extensions to three letters. There is no difference in the file itself.

Which is better quality, JPEG or PNG? PNG is technically higher quality because it is lossless and keeps every pixel. But for photographs, a high-quality JPEG looks identical to the eye at a fraction of the size, so “better quality” only matters for graphics, text, and transparency.

Can I convert a JPEG to PNG to improve it? No. Converting a JPEG to PNG cannot recover detail that JPEG already discarded. You just get a larger file with the same artifacts baked in. Only start from PNG if the original was never a JPEG.

Does PNG support transparency and JPEG does not? Correct. PNG has an alpha channel for real transparency. JPEG has none, so any JPEG “logo” comes with a solid background, usually white.