Understanding image file formats

TL;DR

This guide breaks down key image file formats so designers pick the right one for print, web, or editing.

• JPG uses lossy compression, making it lightweight but prone to quality loss after repeated saves.
• PNG uses lossless compression and supports transparent backgrounds, ideal for digital illustrations.
• SVG files are vector-based, scaling to any size without losing quality or sharpness.
• PDF preserves layouts across devices and supports CMYK, bleed, and crop marks for printing.
• TIFF is considered a master file format, popular for professional photography and archiving.

Why file formats matter for creatives

As a designer or illustrator, your ideas are only as powerful as the way you share them. A logo that looks pixelated in print or an illustration that loses detail online can all undermine your work. File formats may seem like small details, but they can make a big difference in how your work is viewed, shared, and printed. Understanding file formats helps you save time and get the best results as a creative. This guide will walk you through the most important file formats every creative should know, breaking down what they are and when best to use them.

JPG

JPG (or JPEG, short for Joint Photographic Experts Group) is a raster file format designed for compressing and storing photographs. Raster file format stores images as a grid of tiny colored pixels.

JPG uses lossy compression, which means it reduces file size by discarding some image data. That’s why JPGs are so lightweight and easy to share, but also why they can lose quality after repeated saves or when heavily compressed.

Best use: Social media visuals and portfolio images

PNG

PNG stands for Portable Network Graphics. Similar to JPG, it’s also a raster file format. However, unlike JPG, PNG uses lossless compression. This means the image retains all details and sharpness even after multiple saves, but it also results in larger file sizes.

Another standout feature of PNG is it allows images to have transparent or semi-transparent backgrounds (essential for overlays, icons, and logos on varied backgrounds), making it a favorite among designers for web and digital graphics.

Best use: Digital illustrations

SVG

SVG stands for Scalable Vector Graphics. Unlike raster formats (like JPG or PNG) that are made of pixels, SVG files are called vector formats. This means these are built from mathematical equations and paths (lines, shapes, fills, and curves). This allows them to be scaled up or down to any size without ever losing quality. While JPG looks like a photo mosaic when you zoom in because you’ll see little squares (pixels), an SVG allows you to zoom in forever, and the lines stay sharp. 

Since they store math-based instructions instead of pixel data, SVGs are often smaller than PNGs or JPGs. It also supports transparency. 

SVG files can be opened in different software that caters to vector format or even a code editor, and designers can adjust curves, paths, and colors easily. It is also web-friendly and supported by all modern browsers.

Best use: App, web, and UI icons that must adapt to different screen sizes.

Pixabay has a separate media type for easy browsing of vector files.

PDF

PDF stands for Portable Document Format. PDF ensures documents look the same on any device or platform as it preserves layouts. Unlike image-only formats, a PDF can hold text, images, vector graphics, and even interactive elements (like links or forms).

PDFs have small file sizes and are widely compatible with different devices. It also supports CMYK color profiles, bleed, and crop marks, making it print-friendly. Another strength is their security. PDF can be password-protected, flattened, or compressed for client handoff, making it great for sharing.

Some of the cons are that it is not always easy to edit without specific software. It can also have large file sizes if not optimized.

For designers, PDFs are the final delivery format because they preserve the integrity of layouts and designs across devices.

Best use: Print-ready files like posters and brochures

TIFF

TIFF stands for Tagged Image File Format, a raster file format widely used in photography, desktop publishing, and professional printing. Unlike JPG, TIFF can be lossless, meaning it keeps every bit of image data, which makes it excellent for high-quality, detailed images.

But that sounds like PNG, right? At first glance, they might seem similar, but they serve very different purposes in design. While PNG is designed for web and digital use, TIFFs are designed for professional photography, printing, and archiving. TIFF files tend to be very large because they store a lot of detail and layers, which is why these are not practical for websites or casual sharing. To add to this, TIFF supports CMYK, which PNG does not (CMYK is ideal for print workflows).

Because of this, TIFF is often considered the “master file” format in photography and design—something you archive or send to print, not necessarily something you use on the web.

Best use: Publishing (magazines, catalogs, large prints)

Other image file formats

Pixabay also accepts other editable “working formats” like AI and PSD for images.

• AI stands for Adobe Illustrator, Adobe’s proprietary vector file format. It’s for creating scalable vector graphics like logos, icons, typography, and illustrations. It maintains all layers, paths, and effects for flexible editing.
• PSD stands for Photoshop Document, the native file format for Adobe Photoshop. Unlike AI, PSD is raster-based (pixel-based), meaning it’s ideal for photo editing, digital painting, and layered design compositions. It can hold layers, masks, filters, adjustment layers, and effects.

Pick the right tool for the job

As a designer, your craft is both creativity and communication. Choosing the right file format ensures your work prints as intended, displays beautifully online, or stays editable for future updates. Choosing the right file format is about matching the format to your needs. Mastering them helps you present your work at its best.