JPG vs PNG vs WebP: Which Image Format Should You Use?

By Muhammad Rehan Baig · September 19, 2026 · 8 min read

Every time you save an image you make a choice, even if you just accept the default. Pick well and your photo looks great at a small file size. Pick badly and you end up with a blurry logo, a screenshot with fuzzy text, a "transparent" image with a white box around it, or a file ten times larger than it should be. This guide explains how JPG, PNG and WebP differ, where the newer AVIF format fits in, and gives you a simple way to decide which one to use.

The one idea that explains everything: lossy vs lossless

Image formats compress pixels in one of two ways:

• Lossless formats store the image so it can be rebuilt exactly, pixel for pixel. Nothing is lost, but files stay relatively large, especially for photos.
• Lossy formats discard detail that people are unlikely to notice, such as fine texture and subtle color shifts. Files get dramatically smaller, but every save throws away a little information that cannot be recovered.

Photos are full of noise and natural texture, which lossy compression handles beautifully. Screenshots, logos and diagrams have flat colors and razor-sharp edges, which lossy compression handles poorly and lossless compression handles very efficiently. Most format decisions come down to that difference.

JPG (JPEG): the universal photo format

JPEG was standardized in the early 1990s and is still the most widely supported image format in the world. ".jpg" and ".jpeg" are the same format; the shorter extension dates back to old systems that only allowed three-letter extensions.

Strengths:

• Excellent compression for photographs, with an adjustable quality level.
• Opens everywhere: every browser, phone, operating system, email client, printer kiosk and upload form.
• Can be saved as "progressive," which shows a rough preview while the image is still loading.

Weaknesses:

• No transparency. Transparent areas turn into a solid color, usually white or black.
• No animation.
• Sharp edges and text pick up faint halos and speckles, which makes JPG a poor choice for screenshots and logos.
• Generation loss: editing and re-saving a JPG repeatedly degrades it a little each time.

PNG: lossless, sharp and transparent

PNG was created in the mid-1990s as an open, patent-free replacement for GIF. It is lossless, so what you save is exactly what you get back.

Strengths:

• Perfectly crisp text, lines and flat colors, which makes it ideal for screenshots, user-interface images, charts, diagrams and logos.
• Full alpha transparency, including soft, semi-transparent edges and drop shadows, not just on/off transparency like GIF.
• Safe for editing: you can open and re-save a PNG as many times as you like with no loss.
• An animated variant, APNG, works in all current major browsers.

Weaknesses:

• Photos saved as PNG are usually several times larger than the same photo as a good-quality JPG, with no visible benefit.
• Savings on complex images are limited, because lossless compression cannot discard anything.

One technique worth knowing: for graphics with a limited number of colors, a PNG can be reduced to a palette of 256 colors or fewer. This makes files much smaller and often looks identical for flat artwork, though it is not suitable for photos.

WebP: one format that does both

Google introduced WebP in 2010 to make web images smaller. Its big advantage is flexibility: a single format can be lossy or lossless, and both modes support transparency and animation.

Strengths:

• Smaller files. Google's own published comparisons found lossy WebP files 25–34% smaller than JPGs of comparable quality, and lossless WebP files about 26% smaller than PNGs. Your results will vary by image, but WebP is reliably smaller in practice.
• Transparency in both lossy and lossless mode. A lossy WebP with an alpha channel can replace a large PNG for things like product cutouts.
• Animation, typically at a fraction of the size of an equivalent GIF.
• Supported by every current major browser, including Safari since version 14 in 2020.

Weaknesses:

• Outside the browser, support is less universal. Some older desktop software, print services and upload forms still reject WebP files.
• Lossy WebP always stores color at reduced resolution, which can soften fine colored detail such as thin red text. For that kind of image, use lossless WebP or PNG.
• The maximum image size is 16,383 × 16,383 pixels, which matters only for very large panoramas or scans.

If you download a WebP image and an app or website refuses to accept it, the WebP to JPG converter turns it into a file that works everywhere.

Where AVIF fits in

AVIF is a newer format based on the AV1 video codec from the Alliance for Open Media. It typically produces smaller files than WebP at the same visual quality, handles smooth gradients well, and supports transparency, animation, high dynamic range (HDR) and wide color. All current major browsers can now display it.

The trade-offs are practical rather than visual. AVIF is slower to encode than JPG or WebP, editing and upload support in other software is still catching up, and very old browsers and operating systems cannot open it. Many websites now offer AVIF first with WebP or JPG as a fallback, which gives modern browsers the smallest file without breaking anything for older ones.

Side-by-side comparison

What about GIF and SVG?

GIF is limited to 256 colors per frame and only supports on/off transparency, so photos look grainy and files are large. It survives mostly for short animations and reaction images. For your own animations, an animated WebP or a short muted video loop is usually far smaller.

SVG is a different kind of format altogether. Instead of storing pixels, it describes shapes with code, so it stays perfectly sharp at any size. If your logo or icon exists as a vector file, SVG is usually the best choice for a website. You only need PNG when a platform does not accept SVG.

Which format should you use? A quick decision guide

1. Is it a photo going on your website? Use WebP (or AVIF with a fallback). Use JPG if your website platform does not support WebP.
2. Is it a photo you are emailing, printing or uploading to a form? Use JPG. It is the format least likely to be rejected.
3. Is it a screenshot, chart, diagram or anything with text? Use PNG, or lossless WebP on the web.
4. Does it need a transparent background? Use PNG, or WebP on the web. Never JPG.
5. Is it a logo or icon? Use SVG if you have a vector version; otherwise PNG.
6. Is it animated? Use animated WebP or a short video instead of GIF where you can.
7. Is it a master copy you will keep editing? Keep it in a lossless format (or your editing app's own format) and export a JPG or WebP copy for sharing.

Converting between formats: what actually happens

Conversions are not all equal, and a few of them surprise people.

PNG to JPG

This is a great way to shrink photos that were saved as PNG by mistake, such as phone screenshots of photos or exports from design apps. Any transparent areas are filled with a solid background color, because JPG cannot store transparency. Do not use it for logos or screenshots with text, which will lose their crisp edges. Use the PNG to JPG converter for this.

JPG to PNG

Converting a JPG to PNG does not restore any quality. The detail the JPG encoder discarded is gone for good; the PNG just stores the already-compressed pixels losslessly, so the file usually gets bigger. It is still useful when you need to edit an image repeatedly without further loss, or when a platform specifically asks for PNG. The JPG to PNG converter handles it in one step.

WebP to JPG or PNG

Use JPG for photos and PNG for anything with transparency or text. This is the conversion to reach for when software refuses a WebP file.

Anything to WebP

Converting JPG or PNG images to WebP before you publish them is one of the easiest ways to speed up a website. The Image Converter converts between JPG, PNG and WebP in your browser, so your images are never uploaded anywhere.

Serving modern formats with a fallback

If you run a website and want the smallest files without leaving anyone behind, the HTML <picture> element lets the browser pick the best format it understands:

<picture>
  <source srcset="photo.avif" type="image/avif">
  <source srcset="photo.webp" type="image/webp">
  <img src="photo.jpg" alt="Describe the photo" width="1200" height="800">
</picture>

The browser takes the first format it supports and ignores the rest, and the plain <img> works as a safety net. Many content management systems and image CDNs can do this for you automatically.

Common mistakes to avoid

• Saving photos as PNG. They look no better and can be many times larger.
• Saving screenshots as JPG. Text and interface edges get smudgy; PNG keeps them sharp, often at a similar or smaller size.
• Expecting JPG to keep transparency. It cannot. Your logo will get a solid box around it.
• Re-saving JPGs over and over. Each save loses a little more detail. Edit from a lossless master instead.
• Uploading WebP where it is not accepted. If a form or app rejects your file, convert it to JPG or PNG.

Choosing the right format is half of the job; the other half is sizing and compressing well. Our guide on how to compress images without losing quality covers that step by step.

Key takeaways

• JPG is the safe, universal choice for photos you share, print or upload.
• PNG is best for screenshots, text, logos and anything that needs transparency or repeated editing.
• WebP gives smaller files for both photos and graphics on the web and is supported by every current browser.
• AVIF is usually smaller still, but encodes more slowly and is less widely supported outside browsers; serve it with a fallback.
• Converting a JPG to PNG never restores lost quality, and converting a PNG to JPG always removes transparency.