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

Choosing the wrong image format can slow down your website, reduce image quality or increase storage costs unnecessarily. Here is a clear, jargon-free guide to help you choose the right format every time.

JPG (JPEG) — Best for Photographs

JPG is the most widely supported image format in the world. It uses lossy compression, meaning some image data is discarded to achieve small file sizes. For photographs and images with complex colour gradients, this loss is virtually invisible at quality settings of 75% or above.

• ✅ Very small file sizes
• ✅ Universally supported on all devices, browsers and platforms
• ✅ Perfect for photographs and real-world imagery
• ❌ Does not support transparency
• ❌ Quality degrades each time you save (avoid re-saving JPGs repeatedly)
• ❌ Not ideal for text, logos or sharp edges

Use JPG for: photographs, product images, backgrounds, hero images on websites.

Why JPG Struggles With Text and Sharp Edges

JPG's compression works by grouping pixels into small blocks and averaging colours within each block — a technique that's nearly invisible in areas with gradual colour changes (like the sky in a photograph) but much more noticeable at sharp transitions. Text on an image — black characters on a white background — consists almost entirely of sharp transitions, so JPG's block-averaging produces fuzzy edges and colour fringing around each character, giving text a slightly soft, blurry appearance compared to how it looks in PNG. This is why screenshots, which contain sharp interface elements and text, look noticeably worse in JPG than PNG even at high quality settings, while a photograph of a landscape shows little difference between the two.

PNG — Best for Graphics with Transparency

PNG uses lossless compression — no image data is discarded. This means perfect quality at all times, but larger file sizes than JPG. PNG supports transparency (alpha channel), making it the only choice when you need a transparent background.

• ✅ Perfect quality, no compression artefacts
• ✅ Supports full transparency
• ✅ Ideal for logos, icons and text-heavy images
• ❌ File sizes much larger than JPG for photographs
• ❌ Not ideal for complex photographs

Use PNG for: logos, icons, screenshots, graphics with text, images needing transparent backgrounds.

WebP — The Modern Winner for Websites

WebP is a modern image format developed by Google. It supports both lossy and lossless compression and produces files that are typically 25–35% smaller than equivalent JPG or PNG files at the same visual quality. It also supports transparency like PNG.

• ✅ Smallest file sizes — faster websites
• ✅ Supports transparency
• ✅ Supported by all major browsers (Chrome, Safari, Firefox, Edge)
• ✅ Both lossy and lossless modes available
• ❌ Not universally supported in older software and email clients
• ❌ Not ideal for print (use JPG or PNG for print)

Use WebP for: all website images where loading speed matters. It is the best default for web in 2026.

The "Generation Loss" Problem With JPG

One of JPG's less-obvious limitations is what happens when you save the same file multiple times through editing. Each time a JPG is saved, the lossy compression runs again on an already-compressed image — introducing a small additional quality loss on top of the previous pass. A single save at high quality is barely noticeable, but opening, editing and re-saving a JPG many times compounds these losses, producing increasingly soft or artefact-heavy results over time. This is why JPG is best treated as a final-output format rather than a working format: keep original images in a lossless format (PNG or an uncompressed source) during the editing process, and convert to JPG only when producing the final version for sharing or publishing.

Quick Reference — When to Use Each

• Website photos: WebP (first choice) or JPG
• Website logos and icons: WebP or PNG (if transparency needed)
• Social media posts: JPG at 80–85% quality
• Email attachments: JPG (universal support)
• Print documents: JPG at 100% quality or PNG
• Screenshots: PNG (preserves text sharpness)
• Transparent backgrounds: PNG or WebP

How to Convert Between Formats for Free

If you have an image in the wrong format, converting it takes seconds. Our Image Format Converter converts between JPG, PNG and WebP entirely in your browser — no upload, no account, free forever.

The Simple Decision Rule

If you find the full comparison overwhelming, this single rule covers the majority of cases correctly: use PNG if you need transparency, use WebP if you're publishing to a website and don't need to worry about older software compatibility, and use JPG for everything else — especially photographs being emailed, shared, or stored. Following this rule won't always produce the theoretically optimal choice for every edge case, but it will produce a sensible, compatible result for virtually every everyday situation you're likely to encounter.