PNG vs JPG vs WebP: Which Image Format Should You Use? (2025)

The Quick Answer

If you just need a fast decision, use this tree:

Still not sure? Read on — each section below explains the reasoning and the edge cases.

JPEG / JPG — Best for Photos

JPEG (also written JPG) has been the default photo format since 1992. It uses lossy compression, which means it discards some image data to shrink file size. For photographs — where the human eye tolerates subtle colour variation — this trade-off is almost invisible.

• ✓Lossy compression — smaller files, some quality loss at high compression levels.
• ✓No transparency support — the alpha channel is not part of the JPEG spec.
• ✓Ideal for photography: portraits, landscapes, food, product shots.
• ✓Universal support — every device, browser, email client, and app reads JPEG.
• ✓Quality sweet spot: 70–85% quality in most export tools. Below 70% you'll see blocky artefacts (called compression artefacts); above 85% file size grows with minimal visible gain.

PNG — Best for Graphics & Transparency

PNG uses lossless compression — it never discards data, so the decoded image is pixel-perfect. This makes it the right choice wherever quality cannot be compromised or transparency is required.

• ✓Lossless — no quality degradation, no artefacts, ever.
• ✓Full alpha channel support — pixels can be fully transparent, semi-transparent, or opaque.
• ✓Ideal for logos, icons, screenshots, UI graphics, and illustrations.
• ✓Larger files than JPEG for photos — photographic content has too much colour variation for lossless compression to shrink well.
• ✓PNG-8 (256 colours) vs PNG-24 (16 million colours + alpha) — use PNG-24 for anything with smooth gradients or transparency.

WebP — Best for Web Performance

WebP was developed by Google and released in 2010. It supports both lossy and lossless compression as well as a full alpha channel — meaning it can replace both JPEG and PNG in most web contexts with a smaller file.

The main limitation of WebP is tooling: some older design apps, CMS platforms, and email clients do not handle it. For anything going to print or into an email template, stick with JPEG or PNG. For everything on the web, WebP is the right default.

AVIF — The Emerging Standard

AVIF (AV1 Image File Format) is the next generation after WebP. It offers even smaller file sizes than WebP at comparable quality, with excellent HDR support and wide colour gamut.

• ✓Typically 20–50% smaller than WebP at equivalent visual quality.
• ✓Supports transparency (alpha channel) and HDR.
• ✓Browser support reached ~93% in 2025 (Chrome, Firefox, Safari 16+, Edge).
• ✓Limited tooling — many design apps, CMSs, and image editors do not yet export or read AVIF natively.
• ✓Encoding is slow — generating AVIF files takes significantly longer than JPEG or WebP.

Side-by-Side Comparison Table

* Typical size based on a 2000 × 2000 px photographic image at standard quality settings.

Which Format for Different Use Cases

How to Convert Between Formats Free

Once you know which format you need, converting is easy with the GenieTools Image Converter. Everything runs in your browser — no upload to a server, no signup, no watermark.

1. 1

   Open the Image Converter

   Navigate to genietools.app/tools/image-converter. The tool loads instantly — no installation needed.

2. 2

   Upload your image and choose the output format

   Drag and drop (or click to browse) your PNG, JPG, or WebP file. Select your target format from the dropdown — PNG, JPEG, or WebP.

3. 3

   Download the converted file

   Click Convert and download the result in seconds. The conversion happens entirely in your browser, so your images never leave your device.

Need to reduce file size after converting? Use the GenieTools Image Compressor to shrink any image without visible quality loss. You can also read our guide on how to compress images for the web for a complete walkthrough.