Ever had a client send you a .webp image that your design software couldn't open? Or downloaded a .avif asset from the web only to find your e-commerce platform rejects it with a "format not supported" error?
Image formats seem simple enough — until you pick the wrong one and it costs you time. Let's settle the debate once and for all: what's the difference between the four major formats, and how do you actually convert between them?
Format Comparison at a Glance
| Feature | JPEG | PNG | WebP | AVIF |
|---|---|---|---|---|
| Compression | Lossy | Lossless | Lossy + Lossless | Lossy + Lossless |
| Transparency | ❌ | ✅ | ✅ | ✅ |
| Animation | ❌ | ❌ | ✅ | ✅ |
| Compatibility | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ |
| File Size | Medium | Large | Small | Smallest |
| Best For | Photos | Screenshots / Icons | Web Images | Next-gen Web |
When Should You Use Each Format?
Use JPEG when:
- Working with camera photos, landscapes, portraits
- You need small file sizes but don't need transparency
- Maximum compatibility is required (every device and software supports it)
- Not suitable for: text screenshots, logos, images that need transparent backgrounds
Use PNG when:
- Creating logos, icons, UI mockups
- You need transparent backgrounds
- Working with text screenshots or table screenshots (sharp edges matter)
- Not suitable for: photos (file sizes get too large)
Use WebP when:
- Optimizing website images (25%–35% smaller than JPEG)
- You need transparency but want smaller file sizes
- You need animation support (replaces GIF)
- Not suitable for: legacy systems (browsers below Windows 7 don't support it)
Use AVIF when:
- You want the absolute best compression (20%–30% smaller than WebP)
- You need HDR and wide color gamut support
- Not suitable for: scenarios that require broad compatibility
Hands-On: Converting Formats with PixelForge
Open the PixelForge format conversion tool:
Step 1: Choose your target format Select the format you want to convert to (JPEG / PNG / WebP / AVIF).
Step 2: Drop in your images Supports batch upload — process dozens of images at once.
Step 3: Adjust the settings
- JPEG quality: 80%–90% recommended
- Size limit: optional — leave unrestricted or set a max width/height
- WebP/AVIF quality: 80% recommended
Step 4: Download Download images one by one after conversion, or package them all in a single zip.
Everything runs locally in your browser. Your images never leave your device — your privacy and security are guaranteed.
Common Format Conversion Myths
Myth #1: Converting PNG to JPEG always shrinks the file True — but PNG's transparent background becomes a solid white fill. If your image has transparent regions, converting to JPEG will leave ugly white blocks.
Myth #2: WebP is the best format, period WebP is excellent, but if your primary audience uses Safari 15 or below, WebP may not render at all. Always check browser compatibility first.
Myth #3: AVIF has the best compression, so use it everywhere AVIF does offer the highest compression, but its encoding speed is 5–10× slower than WebP. It's not suitable for real-time processing. Use it for pre-compressing static assets.