Not knowing how to paint is a “scratch” for many designers and friends. As far as design is concerned, the illustration does have a very powerful bonus: it makes the design softer and more humane and makes the visual expression more rich and diverse. Illustrations combined with brand factors can make the brand value higher, and illustrations customized according to product characteristics can make the product feel stronger.
The rich application range of illustrations makes it extremely valuable, and the requirements for customized illustrations are high, and there are not many ready-made illustrations sources, which makes high-quality, freely available illustration libraries even more precious.
This time, we have assembled a free, high-quality, and easy-to-use illustration library currently on the market.
In this article, we have gathered Free Illustration Stock to help UI/UX Designers work better. Please use them wisely because they can really bridge the distance between you and the illustrator in many cases.
Top Free Illustration Stock for Designers
1. ITG

ITG Digital was recommended as the first gallery for many reasons. First of all, the quality of the illustrations it provides is of course unexplainable; secondly, you can search for illustrations based on the theme you need; finally, these illustrations can be edited online and customized to make them more in line with your design needs.
ITG Digital offers three options: free, monthly and annual. There are no restrictions for additional users. Free users can download 100 illustration projects at will. If you use design projects, you need to attach a link to ITG DIgital, nothing more.
2. Ouch by Icons8

Students who often look for icons online should be familiar with the free icon service provided by Icons8, and Ouch is an illustration library service provided by the Icons8 team. It is also selfish to put it in the front position. Ouch itself provides 20 different styles of illustrations for you to choose from, you can customize them in Vector Creator provided by Ouch. You can mix different illustration elements, change colors, zoom in and out, and add content. More importantly, if you want to use this service, you don’t even need to register an account, just use it directly.
Ouch provides paid subscription services for teams and individual users. Of course, there is no problem with free use, but you need to thank the author, add links according to the license requirements, nothing more.
3. Undrawn

The Undrawn illustration service is also very top: it is completely free, whether commercial or personal projects, you can use it at will. You can download files in SVG format or download files in PNG format with transparent background for your daily use.
When using it, pay attention to the upper right corner, you can set the color scheme. You can also search for pictures matching the search box’s corresponding theme according to the theme you need.
4. Humaans

If you need illustrations related to character scenes, this set of Humans illustrations by Pablo Stanley is worth trying.
This set of illustration tools can be said to be almost prepared for UI designers. When you click to download, it will jump to Dropbox for download. This set of materials contains people with different poses. You can modify their clothes, colors, poses and other details. The materials are also made for Sketch and InVision Studio. If you use these tools, you can start using them almost immediately.
5. DrawKit

DrawKit set of tools contains a variety of free and paid illustrations, you can use it for a variety of projects without declaring the source. All free illustration materials are at the top of the page. You can search through keywords to find illustrations that match your needs.
On the DrawKit website, you can find two different styles of illustrations, and you can download files in PSD and PNG formats. Illustrator James Daly created the illustrations on this website. His goal is to update 2 to 4 illustrations every day.
6. OpenDoodles

OpenDoodles is also a completely free and commercially available illustration service. You can modify the content of these illustrations at will. The promoter behind this project is actually the author of the Humaaans project, so it is also completely free.
OpenDoodles provides downloads of illustrations in SVG and PNG format, and occasionally GIF format. In addition, you can also use OpenDoodles Generator to modify the illustration content, such as color matching and details. Another special feature of OpenDoodles is to provide downloads of complete illustration packages.
7. LukaszAdam

If you want to find a more cool illustration library, then you can try LukaszAdam this library. Lukasz is an illustrator with a unique style. His works are known for their meticulous details and elegant outlines. All his illustrations can be downloaded and used at will, no need to declare the author and source, very good!
8. Absurd Design

This is a gallery known for its absurdity and art. The illustrators of these works are good at injecting imagination into the elements of reality to create a unique visual tension. You can use some illustrations for free, but you need to declare the source.
If you choose to pay for it, then you can use all 300 images and download the illustrations in PNG and SVG format without restriction-in addition to the black and white line drafts, there are also colored versions.
9. Glaze

Glaze is also a gallery website with exquisite illustrations. The illustrations on the website provide a complete classification, which you can download according to your needs. If you want to use it for free, you can download a relatively low-resolution (72dpi) version, and you need to declare the source.
However, if you are an illustrator, then you can choose to join this website and upload and sell your illustrations on the platform. If someone pays to buy your illustrations, you will get a 70% share.
10. Manypixels

Manypixels can be an excellent source of free illustrations. The authors of these illustrations allow free download, free use, and customization, and there is no need to declare the author and source.
Similar to Undraw, you can download the illustrations on this website to adjust the color according to your needs, then download the SVG and PNG format illustrations and apply them to your own designs.
11. MixitArt

The illustrations on MixitArt are also very high-quality and very artistic. Like most similar websites, you can search and find the illustrations you need through classification and search engines. Each of these illustrations has a corresponding description.
The point is that the illustrations provided by MixitArt can be used completely free of charge, no need to indicate the source!
12. Isometric

When you need completely free, customizable isometric/2.5D illustrations, you can come to this website to find resources! Isometric is a gallery website that follows the MIT agreement. In other words, they provide completely free illustration materials. You don’t need to declare the source when you use it, and you can modify and use it at will.
All the pictures and illustrations you see on the website are from the UI designer and illustrator Sergei. Compared with other similar websites, Isometric does not provide the most picture materials, but it is free enough.
13. Paaatterns

Paaatterns is different from several other illustration websites in that it mainly provides a variety of rich patterns, not illustrations. These patterns are rich in colors and highly decorative. You can download PNG and SVG format materials for your use. At the same time, the website also recommends that you use Sketch, Figma and XD software to edit and use them.
Conclusion
Some of these 13 Free Illustration Stock images may have been heard or seen before, but they are still full of surprises, right? If you can’t stop and learn illustration skills honestly, then these illustration websites can help you respond well to your current needs.