7 Common and Need-to-Know Design File Formats

What Format Do You Use for Your Online Design Files?

Information technology keeps developing, leading to a variety of specialized software for imaging and graphic design, and with it, many different image and design file formats. This causes difficulties for designers, especially beginners, who often find it hard to tell these formats apart. Here are the 7 most common design file formats and what each one is for.

1. JPG Format

JPG, or JPEG (Joint Photographic Experts Group), combines red, green and blue to display millions of colors. It is widely used on the internet and by most digital cameras.

JPG compresses images well: a 1MB photo can shrink to 500KB or 100KB. But JPG is a lossy format, meaning the image loses quality each time it is saved, copied or re-exported, which shows up as blurred, defocused areas when the image is enlarged. For that reason, JPG is mainly used for display on electronic devices, and rarely for professional editing or printing.

Characteristics of JPG files:

• Commonly used for digital images and images displayed on screens.
• Loses some image quality each time it is compressed.
• Does not support a transparent background.
• Not used for printing, except small, high-quality images such as photo prints.

2. PNG Format

PNG (Portable Network Graphics) uses lossless compression, so its quality is preserved no matter how many times it is saved.

PNG supports transparent backgrounds, so images like icons and logos without a background are usually saved as PNG. This lets them be placed anywhere without a visible border.

PNG files are larger than JPEG, which is one reason PNG is less common for general web use, outside of logos that need a transparent or translucent background.

Characteristics of PNG files:

• Commonly used for graphic design and images with text displayed on screens.
• Keeps image quality when compressed.
• Supports images without a background (transparency).
• Not used for printing.

3. PSD Format

PSD, short for Photoshop Document, saves a file as layers that can still be edited after saving. Once editing is finished, Photoshop can merge the layers and export to another format such as JPEG, GIF or TIFF.

Once a file is saved in a format other than .psd, it generally cannot be edited the same way again, so it is worth keeping a PSD copy in case further edits are needed later.

PSD is also a raster format: unlike a vector format, enlarging a PSD image beyond its original size reduces its quality.

Characteristics of PSD files:

• A specialized format for editing images in Adobe Photoshop, with layers, masks, actions and filters.
• Built on a raster platform, so enlarging beyond the original size loses quality.
• Not used for printing directly and does not support vectors.

4. GIF Format

GIF (Graphics Interchange Format) is a long-standing, commonly used internet format. It is an 8-bit color file, limited to a maximum of 256 colors, so complex images with many tones lose color accuracy when converted to GIF.

Because it supports so few colors, a GIF file is often much smaller than an equivalent JPEG. GIF also supports simple animation, created in software such as Photoshop, and compresses losslessly, so there is no data loss when compressing.

Characteristics of GIF files:

• Commonly used online for animated images, including on social media.
• Smaller file size and supports transparency, similar to PNG but at lower color quality.

5. EPS Format

EPS (Encapsulated PostScript) saves graphics such as logos, drawings and illustrations in vector format, and is used mainly for print rather than online display.

Being vector-based, an EPS file can be enlarged or reduced freely without changing its quality. It is supported by popular design software and can be converted to formats such as JPEG, PDF or TIFF using tools like Adobe Photoshop, Adobe Illustrator or CorelDRAW.

Characteristics of EPS files:

• Used for icons and illustrations as vector graphics.
• Built on a vector platform, so size can be increased or decreased without losing quality.
• Can be used for printing, not for online display.
• Can be opened with Adobe Illustrator and Photoshop.

6. PDF Format

PDF files have limited editing capability because the format is intended for publishing and sharing rather than ongoing editing. This is why many people save a finished Word document as a PDF before sending it to others, to avoid font substitution issues on the recipient's computer.

The same applies to complex design files like AI or PSD: saving the final version as a PDF lets it print reliably on any device. PDF files are also relatively small, which makes them easy to share.

Characteristics of PDF files:

• Used to share documents with design or print quality intact.
• Built on a vector basis, so it can be resized without losing quality.
• Suitable for both online display and printing.

7. AI Format

AI is Adobe Illustrator's native file format. Like EPS, it is vector-based, so it can be zoomed in or out without affecting quality.

AI files tend to be large, since they preserve the full editable design, which is why they are often saved as EPS or PDF for fast, lossless printing.

The AI format can also be opened in other design and 3D software such as After Effects, Cinema 4D and Maya.

Characteristics of AI files:

• A specialized format for graphic design and publications, created in Adobe Illustrator.
• Built on a vector basis, so it can be resized without losing quality.
• Not intended for online display; typically exported to EPS or PDF for printing.

Printcart's designer has also added PDF as an export format, giving store owners another choice alongside JPG and PNG when customers design products online.

Conclusion

Understanding the range of design file formats is useful for any designer, from beginners to professionals. Each format serves a different purpose, and choosing the right one for each task helps a design look its best regardless of the medium or platform, whether that is a screen, a shared document, or a final print.