The background image is the largest visual element on most ebook covers, and it is also the element that takes the most time to get right. A strong background does two things at once: it creates mood, and it gives your title text somewhere clean to live. A weak background does neither. Finding the right image on a tight budget requires knowing which free sources are actually usable, what the licensing terms mean in practice, and how to evaluate an image for cover use before you spend an hour building a design around it. This guide covers all three.
Free Stock Sites That Are Genuinely Usable for Covers
Unsplash is the first resource most indie authors find, and it is legitimately useful. The license allows commercial use without attribution, which means you can use Unsplash images on a published ebook cover without crediting the photographer in your book. The selection skews toward lifestyle, travel, nature, and architecture — categories that overlap well with many fiction and nonfiction cover needs. The quality is consistently high because the platform curates submissions. The practical limitation is overuse: certain Unsplash images appear on dozens of self-published covers, and if you pick one of the most popular results for a common search term, you risk a cover that looks identical to a competitor's.
Pexels operates under a similar license to Unsplash and maintains a comparable quality level with a different image set. Searching the same terms on both sites and comparing results is worth the extra five minutes. Pixabay has a larger raw volume of images but the quality is more variable — for every excellent image there are dozens of generic or obviously AI-generated fillers. It requires more sifting but occasionally surfaces images that neither Unsplash nor Pexels carries. All three are appropriate for commercial cover use under their standard licenses.
Canva's built-in image library includes both free and premium (paid) images. The free tier images are licensed for use in Canva designs including commercial projects, but the specific licensing terms allow use only within Canva-created outputs. If you design in Canva using a free Canva image and export the cover as a JPEG or PNG, the commercial use is covered. If you export the Canva file itself for editing in another tool and then use the image, the licensing becomes ambiguous. Staying within Canva's workflow for covers that use Canva's image library is the cleanest approach.
What the Licenses Actually Mean
Most free stock sites use variations of Creative Commons licensing or their own custom royalty-free licenses. The distinctions that matter for book covers are three: whether commercial use is allowed, whether attribution is required, and whether derivative works are permitted. A "derivative work" in this context means a design that incorporates and transforms the original image — which is exactly what a book cover does when it places text over a photograph, crops it, adjusts its colors, or combines it with other elements. Most free stock licenses explicitly permit derivative works and commercial use without attribution, which is why they are usable for cover design without purchasing anything. Reading the license page on each site before using an image is not optional if the image is for a commercial publication; the license terms that apply to one site's images do not automatically apply to images you find on another.
One licensing issue that catches authors off guard is model releases. A photograph of a recognizable person — a face, even a partial one — requires a model release for commercial use in most jurisdictions. Stock sites typically label images as having a model release when they do, but the label is not always visible in search results. If you use a photograph of a person's face on a cover without verifying that a model release exists, you are assuming a legal risk. The safest approach for covers featuring people is to use images from stock sites that explicitly confirm model release status, or to use images where the person is not identifiable — silhouetted figures, backs of heads, or extreme close-ups of non-identifying details.
Evaluating an Image Before You Build Around It
The most common cover design mistake related to background images is choosing an image that looks excellent at full size but fails at thumbnail. Before spending time compositing text over an image, run it through two quick tests. First, scale the image down to roughly 160 pixels wide and look at it for five seconds. Does it still read as a coherent visual — a clear subject, a recognizable mood, enough contrast between light and dark areas? Or does it dissolve into texture noise? Complex photographs with many fine details, lots of foliage, or subtle tonal variations tend to fail the thumbnail test badly. Simple photographs with a clear subject, strong silhouettes, or large areas of uniform color tend to pass.
Second, identify where on the image you plan to place your title text and evaluate the background in that specific area. Is it light or dark enough to allow readable text of the opposite value? Is it uniform enough to not create uneven contrast behind the title? If the area where the title will sit is a complex mix of light and dark tones — a sky with clouds, a forest with patches of sun, a crowd of people — you will need to add a text separation layer regardless of how good the rest of the image is. Identifying this before you start building saves you from discovering the problem after an hour of design work.
Techniques for Making a Photo Work
Almost no photograph works as a book cover background without modification. The standard workflow is to start with a good image and then adjust it to serve the cover's needs rather than preserve the photograph's original qualities. The most useful adjustments are darkening or lightening the overall image, adding a color overlay, blurring or simplifying complex areas, and cropping to change the compositional emphasis. All of these are available in Canva without any paid subscription.
Darkening the image, particularly in the area where the title will sit, is the single most reliable way to improve cover readability. In Canva, this is done by placing a semi-transparent black rectangle over the relevant portion of the image — typically the top third or bottom third, depending on where the title goes — with an opacity between 30 and 60 percent. The result is a naturally darkened area that provides consistent contrast for white or light-colored title text without looking artificially superimposed. This technique is used on professionally designed commercial book covers constantly, which is why it works: readers have processed thousands of covers that use it and accept it as a visual convention.
Color overlays — a semi-transparent solid color placed over the entire image — reduce the image's complexity while tinting it toward a mood. A navy blue overlay at 40 percent opacity over a cityscape photograph turns it into a cool, atmospheric background that reads cleanly as a dark field at thumbnail size. A warm amber overlay at 30 percent over a forest image pushes it toward an autumnal, literary feel. The overlay does not need to match any element in the image; it is a tool for creating a consistent tone across images that might otherwise look busy or inconsistent. Used at 30 to 50 percent opacity, the original image still shows through enough to provide visual texture and interest; used at higher opacity, the overlay becomes a solid color field with just a hint of the photo underneath.
When to Skip the Photo Entirely
Not every cover needs a photographic background. Many strong ebook covers use illustrated, textured, or abstract backgrounds — or no background imagery at all, relying instead on typography and solid color. The decision to use a photograph versus a non-photographic background should be driven by genre conventions and the specific mood you are trying to create, not by default assumptions that covers need photos. Literary fiction and poetry covers frequently use typographic or abstract designs. Self-help and business covers often use clean solid-color or geometric backgrounds that emphasize the title hierarchy rather than creating atmosphere. Children's book covers use illustration. If the right photographic image is not appearing in your searches, stepping back and considering whether a non-photographic approach serves the genre better is a legitimate design decision rather than a compromise.