JPEG vs PNG vs WebP: Choosing the Right Image Format | Bulk Image Compressor
Three Formats, Different Strengths
Picking the right image format isn’t complicated once you understand what each one does well. JPEG, PNG, and WebP each solve different problems, and using the wrong one means you’re either wasting bandwidth or sacrificing quality for no reason.
Here’s what you actually need to know.
JPEG: The Photo Format
JPEG has been around since 1992 and it’s still the default for photographs. There’s a good reason for that: it handles the kind of complexity found in photos (gradients, textures, color variation) really well while keeping file sizes small.
JPEG uses lossy compression, which means it permanently removes some data every time you save. The compression works by analyzing the image in small blocks and discarding details your eyes are unlikely to notice. If you want to understand the technical side, our article on how image compression works breaks it down.
What JPEG does well:
- Photos and images with lots of color variation
- Small file sizes at reasonable quality
- Universal support everywhere
Where JPEG falls short:
- No transparency support at all
- Text and sharp edges get blurry artifacts
- Each re-save degrades quality further
- Logos and graphics with flat colors look worse than they should
Typical file sizes: A 1920x1080 photo saved as JPEG at quality 80 is usually around 200-400 KB. The same image at quality 95 might be 800 KB to 1.2 MB.
PNG: The Graphics Format
PNG was created as a replacement for GIF back in the mid-90s, and it’s the go-to format for anything that isn’t a photograph. Screenshots, logos, icons, illustrations with flat colors, text overlays, UI elements. If it has sharp edges or transparency, PNG is usually the right choice.
PNG uses lossless compression, so you don’t lose any quality no matter how many times you save it. The downside is that file sizes are larger than JPEG for photos.
What PNG does well:
- Perfect quality, no compression artifacts ever
- Full transparency support (alpha channel)
- Text, logos, and graphics with clean edges
- Screenshots
Where PNG falls short:
- Photos end up much larger than JPEG
- File sizes can get big, especially for high-resolution images
- Not ideal when bandwidth is tight
Typical file sizes: A 1920x1080 screenshot with mostly text might be 300-600 KB as PNG. That same resolution as a photo? Easily 3-5 MB, sometimes more.
WebP: The Modern Option
Google developed WebP in 2010 to be better at both jobs. It supports lossy compression (like JPEG) and lossless compression (like PNG), plus transparency, all in one format.
And it delivers. WebP lossy files are typically 25-35% smaller than JPEG at the same visual quality. WebP lossless files are about 25% smaller than PNG. That’s a meaningful difference, especially if your site serves a lot of images.
What WebP does well:
- Smaller files than both JPEG and PNG at equivalent quality
- Supports transparency (unlike JPEG)
- Supports both lossy and lossless compression
- Animation support (a better alternative to GIF)
Where WebP falls short:
- Some older image editing tools don’t handle it well
- Not all social media platforms accept WebP uploads
- Email clients often can’t display WebP inline
Typical file sizes: That same 1920x1080 photo that’s 300 KB as JPEG? About 200-250 KB as WebP lossy. A screenshot that’s 500 KB as PNG? Around 350-400 KB as WebP lossless.
Browser Support in 2025
WebP is supported by every modern browser: Chrome, Firefox, Safari, Edge, Opera. Safari added support in 2020 with macOS Big Sur and iOS 14. Unless you need to support Internet Explorer (which Microsoft retired in 2022), WebP works everywhere.
Side-by-Side Comparison
| Feature | JPEG | PNG | WebP |
|---|---|---|---|
| Compression | Lossy only | Lossless only | Both |
| Transparency | No | Yes | Yes |
| Animation | No | No | Yes |
| Best for photos | Good | Poor (large files) | Better than JPEG |
| Best for graphics | Poor (artifacts) | Good | Good |
| File size (photos) | Small | Large | Smallest |
| File size (graphics) | N/A | Medium | Smaller than PNG |
| Browser support | Universal | Universal | All modern browsers |
| Editing tool support | Universal | Universal | Growing |
Which Format Should You Use?
Here are straightforward recommendations based on what you’re actually doing.
For photographs on the web
Use WebP if your audience uses modern browsers (almost everyone does now). Fall back to JPEG for maximum compatibility. Quality 75-85 for either format gives you the best balance of size and appearance.
For screenshots and UI images
WebP lossless or PNG. Both preserve sharp text and edges perfectly. WebP gives you smaller files if that matters.
For logos and icons
PNG if you need broad compatibility (email signatures, documents). WebP if it’s for the web. SVG is worth considering too if the graphic is vector-based, but that’s a different conversation.
For transparent images
PNG or WebP. JPEG can’t do transparency at all. If you need a photo with a transparent background, WebP is your best bet since it combines lossy photo compression with alpha channel support.
For batch processing
If you’re converting or compressing hundreds of images, use Bulk Image Compressor to process them all at once. It handles JPEG, PNG, and WebP output, so you can pick the right format for each batch.
The Practical Takeaway
Don’t overthink this. For most web projects in 2025:
- Use WebP as your default for web images
- Keep JPEG around for social media uploads and email
- Use PNG for anything that needs perfect quality or if you’re sharing files that need to be edited later
If you want to go deeper on how images affect your site’s speed, check out our guide on best image formats for web performance.
The format you choose matters, but it’s not the only factor. How you compress within that format matters too. A well-compressed JPEG will outperform a poorly compressed WebP. Get the format right first, then spend time on your compression settings.
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