JPG vs PNG vs WebP: Which Format Should You Use?
Every image format makes a different trade-off between file size, quality, and what it can represent - like transparency or sharp edges. Picking the wrong one is a common reason websites load slowly or logos look blurry. Here's how to actually choose.
The Short Answer
- JPG - best for photos and complex images where small file size matters more than pixel-perfect detail.
- PNG - best for logos, icons, screenshots, and anything needing a transparent background or crisp text/edges.
- WebP - best for websites overall; smaller than both JPG and PNG at similar quality, and supports transparency too.
JPG: Built for Photographs
JPG uses "lossy" compression - it throws away some image data to shrink the file, targeting the kind of detail the human eye doesn't notice much in photographs (subtle color gradients, fine noise). That makes it excellent for photos, where file size reduction matters and a bit of quality loss is invisible at normal viewing sizes.
Where JPG struggles: text, sharp geometric edges, and flat colors. Compression artifacts show up as blurry halos or blocky patches around hard edges - which is exactly why JPG is a poor choice for logos or screenshots with text.
JPG also does not support transparency - every JPG has a solid rectangular background.
PNG: Built for Precision
PNG uses "lossless" compression - no image data is discarded, so what you save is pixel-for-pixel identical to the original. This makes PNG the right choice whenever exact detail matters: logos, icons, diagrams, screenshots, and any image with text in it.
PNG also supports an alpha channel for transparency, which is why almost every logo you download online comes as a PNG - it can sit on any background color without a visible box around it.
The trade-off: PNG files are usually much larger than JPGs for the same photograph, since it can't discard data the way JPG does. Using PNG for photos is a common and avoidable cause of slow-loading pages.
WebP: The Modern All-Rounder
WebP is a newer format built specifically to beat both JPG and PNG at their own jobs. It supports both lossy compression (like JPG, for photos) and lossless compression with transparency (like PNG, for graphics) - in one format.
In practice, WebP files are typically 25-35% smaller than an equivalent-quality JPG, and significantly smaller than PNG for graphics with transparency. This is why most modern websites - and increasingly, browsers themselves - default to WebP for images.
The one caveat: some older software and certain print or publishing workflows don't accept WebP directly, in which case you'll want to convert WebP to JPG or convert WebP to PNG first.
Quick Decision Guide
- Uploading photos to a website? Use JPG or WebP - compress the JPG or convert to WebP for faster load times.
- Need a transparent logo? Use PNG - keep it as a compressed PNG to avoid a bloated file size.
- Building a website and want the smallest files? Convert your images to WebP using JPG to WebP or PNG to WebP.
- A tool or platform rejects WebP? Convert back with WebP to JPG or WebP to PNG.
- Not sure what format a file actually is? Check it with Image Format Detector.
Converting Between Formats
Switching formats doesn't restore quality lost in a previous compression step - converting a heavily-compressed JPG to PNG just locks in the existing artifacts at a larger file size. Start from the highest-quality original you have whenever possible, and convert directly to your target format using LovePDFImg's JPG to PNG, PNG to JPG, JPG to WebP, or WebP to JPG converters - all run in your browser, nothing is uploaded.
Key Takeaways
- JPG for photos, PNG for logos/graphics/transparency, WebP as the best all-round default for the web.
- Converting formats doesn't recover quality already lost to compression.
- Use Image Format Detector if you're unsure what a file actually is.
- All conversion and compression tools on LovePDFImg run locally in your browser - your images are never uploaded.