Image Formats Explained: PNG, JPEG, WebP, SVG & AVIF
· 10 min read
Format Comparison
| Format | Type | Transparency | Animation | Best For | Browser Support |
|---|---|---|---|---|---|
| JPEG | Lossy | No | No | Photos | Universal |
| PNG | Lossless | Yes (alpha) | No (APNG yes) | Screenshots, graphics with text | Universal |
| WebP | Both | Yes | Yes | Web images (replaces JPEG+PNG) | All modern browsers |
| AVIF | Both | Yes | Yes | Next-gen web images | Chrome, Firefox, Safari 16+ |
| SVG | Vector | Yes | Yes (CSS/SMIL) | Icons, logos, illustrations | Universal |
| GIF | Lossless (256 colors) | Binary only | Yes | Simple animations | Universal |
| TIFF | Lossless | Yes | No | Print, scanning | None natively |
| BMP | Uncompressed | No | No | Legacy Windows | Most browsers |
JPEG (Joint Photographic Experts Group)
JPEG uses lossy compression optimized for photographs. It excels at continuous-tone images (photos, paintings) but struggles with sharp edges, text, and flat colors (creates visible artifacts).
- Quality 85-95 — Visually lossless for most photos
- Quality 70-85 — Good balance of size and quality for web
- Quality 50-70 — Noticeable artifacts but much smaller files
- Progressive JPEG — Loads blurry-to-sharp instead of top-to-bottom. Better perceived performance.
PNG (Portable Network Graphics)
PNG uses lossless compression. Every pixel is preserved exactly. Key features:
- Alpha transparency — 256 levels of transparency per pixel (vs GIF's binary on/off)
- No quality loss — Save and re-save without degradation
- Large files for photos — A photo as PNG can be 5-10x larger than JPEG
- PNG-8 — 256 colors, smaller files (like GIF but better compression)
- PNG-24/32 — Full color + alpha channel
Convert between formats with our Image Converter.
WebP
Developed by Google, WebP supports both lossy and lossless compression, transparency, and animation — replacing JPEG, PNG, and GIF in one format.
| Comparison | WebP vs JPEG | WebP vs PNG |
|---|---|---|
| Lossy | 25-34% smaller at same quality | N/A |
| Lossless | N/A | 26% smaller |
| Transparency | WebP supports it, JPEG doesn't | Both support alpha |
AVIF
AVIF (AV1 Image File Format) is the newest format, based on the AV1 video codec. It offers the best compression ratios but encoding is slow.
- 50% smaller than JPEG at equivalent quality
- 20% smaller than WebP
- Supports HDR, wide color gamut, and film grain synthesis
- Encoding is 10-100x slower than JPEG (improving with hardware support)
SVG (Scalable Vector Graphics)
SVG is XML-based vector graphics — it describes shapes mathematically rather than as pixels. SVGs scale to any size without quality loss.
Use SVG for: logos, icons, illustrations, charts, and any graphic that needs to look sharp at all sizes. Convert SVG to raster with our SVG to PNG tool.
GIF
GIF supports animation but is limited to 256 colors per frame. For better animated images, use WebP or AVIF animation, or convert video clips to GIF with our GIF Maker.
Choosing the Right Format
| Content | Best Format | Fallback |
|---|---|---|
| Photo for web | WebP or AVIF | JPEG quality 80 |
| Screenshot with text | PNG or WebP lossless | PNG |
| Logo/icon | SVG | PNG with transparency |
| Animation | WebP animated or video | GIF (if <256 colors) |
| TIFF or PNG | JPEG quality 95+ | |
| Thumbnail | WebP or JPEG | JPEG quality 70 |
Frequently Asked Questions
Should I use WebP or JPEG for my website?
WebP is 25-34% smaller than JPEG at the same quality and is supported by all modern browsers. Use WebP with JPEG fallback for older browsers via the HTML picture element.
When should I use PNG instead of JPEG?
Use PNG when you need transparency, sharp text/edges, or lossless quality. Use JPEG for photographs where small artifacts are acceptable and file size matters.
Is AVIF ready for production use?
AVIF is supported in Chrome, Firefox, and Safari 16+. For broad compatibility, serve AVIF with WebP and JPEG fallbacks using the picture element.
Why does my PNG file look the same as JPEG but is 5x larger?
PNG is lossless — it preserves every pixel perfectly. For photographs, this precision is unnecessary. JPEG's lossy compression removes imperceptible details, achieving much smaller files.
What is the best format for social media?
JPEG or PNG. Most platforms re-encode uploads anyway. Use JPEG for photos, PNG for graphics with text or transparency. Recommended: 1080px wide, JPEG quality 85+.