PNG vs JPG: When to Use Each Format

Use JPG for photographs and anything with complex gradients — it compresses photos efficiently with minimal visible loss. Use PNG when you need transparency, when the image has sharp edges or text, or when you cannot afford any quality loss. The wrong choice won't break anything, but it will either bloat your file sizes or degrade your image quality unnecessarily.

The fundamental difference is in how each format compresses images.

JPG uses lossy compression. When you save a JPG, it permanently discards some image data to reduce file size. The more you compress it, the more data is lost. Resaving a JPG multiple times compounds this degradation. At high quality settings (90+), the loss is invisible to most people — but it is irreversible.

PNG uses lossless compression. Every pixel is preserved exactly. You can open, save, and re-export a PNG a thousand times without any quality change. The trade-off is file size: PNG files are larger — often significantly so — because no image data is thrown away.

JPG is the right choice for photographs, product images, and any image with smooth color transitions or gradients. A photo of a landscape, a portrait, or a product on a white background will typically be 3–10× smaller as a JPG than as a PNG with nearly indistinguishable visual quality.

JPG is also the standard for images that will be shared outside of a controlled environment — email attachments, social media uploads, print services, and most CMS uploads. The format has 100% compatibility everywhere.

Avoid JPG for: screenshots with text, diagrams, logos, icons, or any image where you need a transparent background. JPG does not support transparency at all — transparent areas become a solid color (usually white or black).

PNG is the right choice in four specific situations:

Transparency — PNG supports a full alpha channel, meaning pixels can be fully or partially transparent. If you need an image to sit cleanly on different backgrounds (logos, icons, product cutouts), PNG is your only option among these two formats.

Text and sharp edges — JPG compression introduces visible artifacts (ringing, blurring) around high-contrast edges and text. Screenshots, UI mockups, and diagrams look noticeably better as PNG.

Exact reproduction — Whenever you need pixel-perfect fidelity — archiving a design asset, saving a source file, or producing an image that will be edited further — PNG preserves every pixel.

Images with flat areas of solid color — Illustrations, flat-design graphics, and icons often compress more efficiently as PNG than JPG because PNG compression works well on large uniform regions.

The file size gap between PNG and JPG is large for photos and much smaller for graphics.

A typical full-resolution photo (e.g., 3000×2000 pixels) saved as JPG at quality 85 might be 1.5–3 MB. The same photo as PNG would be 8–15 MB — 4 to 5 times larger — with no visible quality benefit on screen.

For a flat logo or icon (e.g., 200×200 pixels), the gap reverses or disappears. A PNG might be 8 KB while a JPG of the same image would be 15 KB — and the JPG would show compression artifacts around the edges.

For screenshots — especially of text-heavy interfaces — PNG is almost always the better choice for both quality and file size, since JPG handles solid colors and text poorly.

Converting PNG to JPG is a one-way quality trade-off. You will lose transparency and any data that the JPG compression discards. For photos, this is usually acceptable — and the file size reduction is worth it. For images with transparency, converting to JPG is typically a mistake unless you are filling the transparent area with a background color.

Converting JPG to PNG adds file size without recovering lost quality. The data that was discarded during JPG compression cannot be recovered. The resulting PNG will be larger than the JPG but identical in visual quality — no better, just bigger. This is only useful if you need to work on the image without further lossy re-encoding, or if your workflow requires PNG format specifically.

Both conversions can be done directly in your browser with PixelTools — no upload required.

For web use in 2026, WebP is worth considering alongside PNG and JPG. It supports both lossy and lossless compression, handles transparency, and produces files roughly 25–35% smaller than JPG at equivalent quality. It is supported by all modern browsers.

If you are building a website, WebP is often the best default for both photos (replacing JPG) and graphics with transparency (replacing PNG). For anything going outside a browser — email, desktop apps, print — stick with JPG or PNG, as WebP support in non-browser software remains inconsistent.

• Photographs and camera images
• Product photos on solid backgrounds
• Anything shared by email or uploaded to social media
• Images where file size matters more than perfect quality

• Images with transparency (logos, icons, cutouts)
• Screenshots and UI mockups
• Diagrams, charts, and illustrations
• Source files and assets you will edit further
• Any image where perfect pixel fidelity is required