JPG vs PNG vs WebP: Differences and Best Uses
Choosing between JPG, PNG and WebP is mostly a question of what the picture shows and where it will be used. Each format makes a different trade between file size, quality and features.
The short version
| JPG | PNG | WebP | |
|---|---|---|---|
| Compression | Lossy | Lossless | Lossy or lossless |
| Transparency | No | Yes | Yes |
| Animation | No | Not in standard PNG | Yes |
| Best for | Photos | Logos, screenshots, text | Web images of many kinds |
JPG (JPEG)
JPG is the long-standing choice for photographs. It discards detail the eye is less likely to notice, which makes files small. At low quality you see blocky patches and fuzzy edges, and each re-save loses more. It cannot store transparency.
PNG
PNG keeps every pixel exactly, so edges and text stay sharp, and it supports transparency. That makes it good for logos, icons, diagrams and screenshots. The cost is size: a photograph saved as PNG is usually much larger than the same photograph as JPG.
WebP
WebP can work in lossy mode, like JPG, or lossless mode, like PNG, and supports transparency and animation. Files are often smaller than JPG or PNG at similar visual quality, although not for every image. Current major browsers display WebP. Older software, some email clients and some upload forms may not accept it, so check where the file is going.
How to choose
- A photo for a web page: WebP or JPG.
- A logo with a transparent background: PNG, or lossless WebP if supported.
- A screenshot with text: PNG, or lossless WebP.
- A file for an old system or a form that lists accepted types: use exactly what the form lists, usually JPG.
Converting between them
Convert from the original whenever possible. Turning a JPG into a PNG does not restore lost detail; it only stores the already-lossy picture in a bigger file. Going from JPG to WebP adds another round of loss, so keep the JPG. The JPG to WebP Converter shows both file sizes so you can decide whether the saving is worth it, and the Image Compressor can switch formats too.
A quick test
Save the same image in two formats and compare. Look at the preview at full size, check the file sizes, and pick the smaller file that still looks right. The winner depends on the picture.
Common mistakes
- Saving photographs as PNG for no reason, which wastes bandwidth.
- Saving text-heavy screenshots as low-quality JPG.
- Assuming WebP is always smaller.
- Converting JPG to PNG and expecting better quality.
Transparency and backgrounds
If a picture has transparent areas, such as a logo that must sit on different coloured backgrounds, JPG cannot store that transparency and will fill it with a solid colour, usually white. PNG and WebP can keep it. Soft shadows and smooth edges rely on partial transparency, which PNG and WebP both support. If you convert such an image to JPG, you may see a white box around the logo.
Why repeated saving matters
Every time a lossy file such as JPG or lossy WebP is opened, edited and saved again, a little more detail is lost, an effect people call generation loss. For work that will be edited several times, keep a lossless master copy, such as PNG or the original camera file, and export a JPG or WebP only at the end.
Colour, detail and special features
- JPG normally stores 8 bits per colour channel and does not support transparency or animation.
- PNG can store higher bit depths than 8 bits per channel and keeps colours exact, which is useful for graphics and technical images.
- WebP offers both lossy and lossless modes and also supports animation and transparency, but at 8 bits per channel.
For ordinary web use these differences rarely matter. They become important for professional printing, scientific images and archival work.
Using WebP safely on a website
Because some older software cannot read WebP, websites often offer a fallback. A page can list a WebP version first and a JPG version second so that each browser picks the first one it understands:
<picture>
<source srcset="photo.webp" type="image/webp">
<img src="photo.jpg" alt="Describe the photo" width="800" height="600">
</picture>Giving the image a width and height also stops the page from jumping around while it loads.
File extensions and what they promise
Renaming a file from .png to .jpg does not convert it. The file’s contents decide its real format, and some programs will refuse a mismatched file. Always convert with a tool that re-encodes the image.
A simple decision guide
- Does the form or program list the formats it accepts? Use one of those.
- Is it a photograph? Choose JPG, or WebP if it is supported everywhere your picture will be used.
- Does it need transparency or crisp lines and text? Choose PNG, or lossless WebP.
- Will it be edited many times? Keep a lossless master and export copies.
Conclusion
Use JPG or WebP for photographs, PNG or lossless WebP for sharp graphics and transparency, and always check compatibility for the place the file is going.
Try the tools
Frequently asked questions
Is WebP better than JPG?
Often smaller at similar quality, but compatibility and the individual image matter.
Does PNG lose quality?
No. PNG is lossless.
Can JPG have a transparent background?
No. Use PNG or WebP.
Which format is best for a logo?
PNG is a safe choice; SVG is better for scalable logos on web pages.