JPG vs PNG vs WebP: Which Image Format Should You Use?
Compare JPG, PNG and WebP on quality, file size, transparency and compatibility, with a simple guide to choosing the right image format for every situation.
By FreeToolsHub Editorial TeamPublished4 min read
Choosing an image format sounds technical, but the decision is usually simple once you know what each one is good at. This guide compares the three formats you will meet most often on the web, and ends with a quick way to choose.
The short answer
- Use JPG for photographs when you need the widest compatibility.
- Use PNG for screenshots, logos, diagrams and anything needing exact pixels or transparency.
- Use WebP for most images on websites, because it is usually smaller and handles both photos and transparency.
Side-by-side comparison
| JPG | PNG | WebP | |
|---|---|---|---|
| Compression | Lossy | Lossless | Lossy or lossless |
| Transparency | No | Yes | Yes |
| Animation | No | No | Yes |
| Best for | Photos | Graphics, text, screenshots | Almost any web image |
| Typical file size | Small for photos | Large for photos | Often the smallest |
| Compatibility | Universal | Universal | All current major browsers; patchier in older software |
JPG
JPG (also written JPEG) has been the standard format for photographs for decades. It discards detail the eye is unlikely to miss, so photographs shrink dramatically. Its weaknesses are that it cannot store transparency, and that sharp edges and small text can show faint blocky artefacts, especially at low quality. Each time you re-save a JPG you lose a little more detail, so always edit from the original.
PNG
PNG is lossless, so every pixel is preserved exactly. That makes it ideal for logos, icons, diagrams, charts and screenshots, where crisp edges and text matter, and it supports full transparency. The downside is size: a photograph saved as PNG is typically many times larger than the same photo as JPG or WebP. If your PNG is a photograph, convert it with the PNG to JPG converter or the Image Compressor and compare.
WebP
WebP can do what both of the others do: lossy compression for photos, lossless for graphics, transparency and animation. It usually produces smaller files at similar visual quality, which helps pages load faster. Its limit is compatibility with older programs and some upload forms. Our guide to what WebP is covers support in more detail, and the JPG to WebP converter lets you see the size difference on your own pictures.
What about AVIF and others?
Newer formats such as AVIF can compress even better in some cases, but they are slower to create and less widely supported in everyday software. The tools on this site work with JPG, PNG and WebP, which cover the vast majority of website needs.
A simple decision guide
- Does the image need transparency? Use WebP, or PNG if you need maximum compatibility.
- Is it a photograph? Use WebP, or JPG if the destination may not accept WebP.
- Is it a screenshot, logo or diagram with sharp lines or text? Use PNG, or lossless WebP if you control the website.
- Is it going into an email, a document or a print job? Use JPG or PNG; they open everywhere.
- Are you not sure the destination accepts WebP? Test one file first, or keep a JPG copy.
Practical workflow
Keep your best-quality original (or a PNG master for graphics). Create web copies in WebP, resized to the size you need, and keep a JPG or PNG fallback for places that do not accept WebP. Then compress carefully; see how to compress images without losing quality for the routine, and why compression matters for the effect on page speed.
Common questions
Which format has the best quality? PNG preserves every pixel exactly. For photos, JPG and WebP can look nearly identical to the original at sensible quality settings.
Why is my PNG so big? Because PNG stores exact detail. Photographs contain a great deal of fine detail, so they are heavy as PNG.
Can I convert WebP back to JPG? You can, but each lossy conversion costs a little quality, so work from the original whenever you can.
