JPG vs PNG vs WebP: which format should you use?
The short answer
- Photograph, no transparency needed? Use JPG.
- Logo, icon, screenshot, or anything needing transparency? Use PNG.
- Want the smallest file size and your platform supports it? Use WebP — it does everything JPG and PNG do, at roughly 25–35% smaller file sizes.
- Short looping animation only? Use GIF. Nothing else.
If you only remember one rule, make it this one: never save a photograph as PNG. It’s the single most common formatting mistake, and it can make a file five to ten times larger than it needs to be with no visible benefit.
Why the format actually matters
Every format makes a different trade-off between file size, quality, and what kind of image content it handles well. Picking the wrong one doesn’t just waste space — it can also produce visibly worse results.
| Format | Compression type | Transparency | Best for |
|---|---|---|---|
| JPG | Lossy | No | Photographs, gradients, complex color |
| PNG | Lossless | Yes | Logos, icons, text, flat colors, screenshots |
| WebP | Lossy or lossless | Yes | Almost everything — modern default |
| GIF | Lossless, limited colors | Yes (binary only) | Short simple animations |
JPG: built for photographs
JPG uses lossy compression, which means it throws away some image data to save space — but it’s specifically tuned for how photographs look, with smooth gradients and complex color variation. This is why a photo saved as JPG at a reasonable quality setting looks nearly identical to the original while being a fraction of the size.
JPG’s weakness shows up with sharp edges, flat colors, and text. Compression artifacts — blocky patches or fuzzy halos — appear most easily around hard edges, which is exactly what logos, icons, and screenshots are made of.
PNG: built for graphics, not photos
PNG uses lossless compression — no data is discarded, so a PNG always looks pixel-perfect. That’s ideal for logos, icons, UI screenshots, and anything with flat colors or text, where JPG’s artifacts would be obvious.
The trade-off is file size. Lossless compression can’t shrink a photograph nearly as much as JPG’s lossy approach can, because photographs contain far more color variation than PNG’s compression handles efficiently. A JPG photo might be 200 KB; the same photo as PNG can easily be 2 MB or more.
PNG is also the only classic format with reliable transparency support, which is why it’s the default output for tools like background removal.
WebP: the modern all-rounder
WebP was built to replace both JPG and PNG for most use cases. It supports both lossy and lossless compression, handles transparency, and typically produces files 25–35% smaller than an equivalent-quality JPG or PNG.
Browser and platform support has become close to universal, so unless you have a specific reason to need maximum compatibility with very old software, WebP is a safe default for anything going on the web.
GIF: only for simple animation
GIF is limited to 256 colors and produces noticeably larger files than modern alternatives for anything static. Its one remaining job is short, simple looping animations. For a static image — even a simple graphic — PNG or WebP will always look better and load faster.
Common mistakes
Saving a photo as PNG “to be safe.” This is the most expensive habit in image formatting. It feels safer because nothing is lost, but the file size cost is rarely worth it for a photograph.
Saving a logo or screenshot as JPG. The compression artifacts around text and hard edges are often immediately visible, especially after the file is resized or zoomed.
Assuming format alone fixes file size. Format determines how an image compresses, not how much you compress it by. A JPG saved at maximum quality can still be unnecessarily large — format and compression settings work together, not as substitutes for each other.
A practical workflow
- Match the format to the content. Photograph → JPG or WebP. Graphic with transparency or flat color → PNG or WebP.
- Convert if needed. If you’re not sure what format a file currently is, or need to switch formats, most compression and resize tools let you choose an output format as part of the process.
- Compress after choosing format, not before. See How to compress images without losing quality for the next step.
Quick reference
- Photos → JPG (or WebP if supported)
- Logos, icons, screenshots, transparency → PNG (or WebP if supported)
- Simple animation only → GIF
- When unsure and the platform supports it → WebP covers both cases at a smaller size