File Types & Color Models · Page 4 of 6
File compression and file types
Compression makes files smaller. Whether it throws away data decides how and where you can use the file.
Lossless
- Uncompressed: every bit of the original data remains after the file is opened again.
- Larger file size.
- No data (pixels, resolution, quality) is lost.
- May keep editable layers and formatting (for example .TIF in Photoshop).
Lossy
- Compressed: only part of the original information remains, although you may not notice.
- Smaller file size.
- Data (pixels, resolution, quality) is lost.
- Layers and formatting are not editable.
Common file types
| Type | Compression | File size | Transparency | Best for | Built from | Notes |
|---|---|---|---|---|---|---|
| .jpg | Lossy | Small | No | Screen and print | Raster | Loses quality every time it is saved and edited. Widely supported. Supports CMYK. |
| .gif | Lossy | Small | Yes | Screen only | Raster | Supports animation. Widely supported. No CMYK. |
| .png | Lossless | Large | Yes | Screen | Raster | Does not lose quality when saved and edited. No CMYK. |
| .tiff | Lossless | Large | Yes | Raster | Does not lose quality when saved and edited. Supports CMYK. | |
| Lossy | Small | No | Raster or vector | |||
| .eps | Lossless | Large | Yes | Raster or vector | ||
| .svg | Lossless | Large | Yes | Screen only | Vector |
© Created by Sara Rosenstock, Marietta College Graphic Design.