WebP vs JPEG vs PNG: When to Use Each Format

Choosing the wrong image format costs you either file size, quality, or compatibility. Here is a plain-English breakdown of the three formats you will encounter most often and when to reach for each one.

JPEG: The Photo Format

JPEG uses lossy compression, which means it throws away some image data to achieve smaller file sizes. For photographs with millions of subtle colour transitions, this loss is nearly invisible at quality settings above 80%. A typical full-resolution photo saved as JPEG at 85% quality is often 5–10× smaller than the same image as PNG.

Use JPEG for: photos, product images, any image with gradients or complex colour.

Avoid JPEG for: logos, screenshots, illustrations with flat colours, or anything with text — compression artefacts turn crisp edges into muddy blurs.

PNG: Lossless and Transparent

PNG compresses without discarding any image data, so the output is a pixel-perfect copy of the original. It also supports transparency (alpha channel), which JPEG cannot.

The tradeoff is file size: PNG files are significantly larger than JPEG for photographic content.

Use PNG for: logos, icons, UI screenshots, illustrations with text, anything that needs a transparent background.

Avoid PNG for: photos — the file size is rarely worth it.

WebP: The Modern Web Format

WebP is Google’s open image format designed to replace both JPEG and PNG on the web. It supports lossy compression (like JPEG), lossless compression (like PNG), and transparency.

The headline benefit is size: WebP images are typically 25–35% smaller than JPEG at equivalent visual quality. Modern browsers — Chrome, Firefox, Edge, Safari 14+ — all support it.

Use WebP for: any image served on a website where you control the build process. It is the best general-purpose choice for web performance.

Avoid WebP for: email attachments and documents where recipients may open the file in older software that does not support it.

How to Convert Between Formats

The Image Converter handles conversion between JPEG, PNG, and WebP entirely in your browser — no upload required.

1. Drop your image onto the converter.
2. Click the target format (JPEG, PNG, or WebP).
3. For JPEG and WebP, drag the Quality slider to balance size and fidelity.
4. Click Convert & Download.

The side-by-side preview shows both the original and converted file with their sizes, so you can judge whether the quality trade-off is acceptable before saving.

Quality Settings That Actually Work

For JPEG exports, quality 80–90% is the sweet spot for most use cases. Below 70%, compression artefacts become noticeable in areas with fine detail. For WebP, you can often drop to 75–80% and still match the visual quality of a JPEG at 85%.

PNG has no quality slider because it is always lossless — what you see is exactly what you get.

Try the Image Converter now — it is free, works offline, and never touches your files.