JPG / JPEG File Format Explained
JPG (JPEG) is the world's most popular image format. It uses lossy compression to store photos at dramatically smaller file sizes. It's the default format for cameras, social media, and most web images.
📋 JPG Quick Facts
| Full name | Joint Photographic Experts Group |
| Extensions | .jpg, .jpeg |
| Compression | Lossy (some quality loss) |
| Transparency | No |
| Color depth | 24-bit (16.7M colors) |
| Animation | No |
| Browser support | All browsers, all devices |
| Best use case | Photographs, social media, web images |
📊 JPG Quality vs File Size
| Quality Setting | Typical File Size | Visual Quality | Best For |
|---|---|---|---|
| 100% | Very large | Perfect | Archiving masters |
| 85–95% | Medium-large | Excellent | High-quality web use |
| 70–84% | Medium | Good | General web images |
| 50–69% | Small | Acceptable | Thumbnails, previews |
| < 50% | Very small | Visible artifacts | Avoid for display |
🛠️ Free Tools for JPG Images
❓ FAQ
What is the difference between JPG and JPEG?
There is no difference. JPEG is the full name, JPG is the 3-character extension used on older Windows systems. Both refer to the same format.
Does JPG lose quality every time I save?
Yes, each time you re-save a JPG, it applies lossy compression again and loses a tiny amount of quality. For editing, work in PNG and convert to JPG only for the final export.
What quality setting should I use for web JPGs?
75–85% is the sweet spot for most web images — visually near-perfect but significantly smaller than 100%.
Can JPG have a transparent background?
No. JPG does not support transparency. Use PNG or WebP for images that need transparent backgrounds.