UD5 Toolkit
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3D eBook Cover Mockup Generator – Flat Image to Book
Adjust Mockup
Quick Presets
Spine Color
Background
Frequently Asked Questions
What image formats and sizes are supported?
Our 3D eBook Cover Mockup Generator supports PNG, JPG, JPEG, and WebP image formats. For best results, we recommend using a cover image with a 1:1.5 to 1:1.6 aspect ratio (typical book cover proportions). The minimum recommended resolution is 600×900 pixels, though larger images will produce sharper mockups. There's no strict file size limit, but images under 10MB work best for browser performance. Your image stays entirely on your device — nothing is uploaded to any server.
Can I customize the spine color and text?
Yes! You have full control over the spine appearance. Use the color picker or preset color swatches to choose any spine color. Click the "Auto" button to automatically extract a complementary spine color from your cover image. You can also add custom spine text (up to 30 characters), which is great for displaying book titles or author names on the spine — just like a real printed book.
How do I get the most realistic 3D book effect?
For the most realistic result: (1) Use a high-resolution cover image with proper book proportions. (2) Set the book thickness to match your book's page count — thicker books (40-80px) look more substantial. (3) Apply a subtle horizontal angle (-5° to -15°) and a slight vertical tilt (3°-8°) for a natural viewing perspective. (4) Choose a spine color that complements your cover design — dark colors work well for most books. (5) Use a medium shadow setting for depth. The "Default" and "Left Tilt" presets are great starting points.
Is the downloaded image high quality?
Absolutely. The mockup renders at 2x resolution internally (using devicePixelRatio), ensuring crisp, high-quality output on both standard and Retina/HiDPI displays. The downloaded PNG file is generated at full render resolution, making it suitable for website displays, social media posts, marketing materials, and even print previews. For the absolute best quality, upload the highest resolution cover image you have available.
Can I use the generated mockup for commercial purposes?
Yes! The mockups you create with this tool are entirely yours. There are no watermarks, no attribution requirements, and no usage restrictions. Whether you need a book mockup for your Amazon KDP listing, a marketing flyer, your author website, social media promotion, or a client presentation — you're free to use the downloaded images for both personal and commercial projects without any limitations.
How is this different from Photoshop mockup templates?
Unlike Photoshop mockup templates that require expensive software and technical skills, our tool works entirely in your browser — no downloads, no installations, and no design experience needed. You get instant visual feedback as you adjust angles, thickness, and colors in real-time. The entire process takes seconds instead of minutes or hours. Plus, it's completely free, whereas quality Photoshop mockup templates often cost $10-$50 each. For quick, professional-looking eBook cover mockups, this browser-based approach is significantly faster and more accessible.
Ebook Cover Mockup – Online Place Image on 3D Book
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Generate dynamic placeholder images by specifying width, height, colors, and text. View instantly as a URL you can embed in mockups. Canvas-based.
Placeholder Image Generator - Online Dummy Image Creator
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