Prepare a cover for your publishing site
How to resize your cover
Choose a JPG, PNG, or WebP image. Enter the width and height in pixels required by your publishing site. Select the output format and press Resize cover. Check the preview and file size before downloading. You can try the tool signed out; join free to see the result and download it.
Keep the full cover or crop it
Keep whole cover preserves the image proportions and adds white margins where needed. Fill frame crops the edges to match your chosen dimensions. Neither option stretches your artwork. Check that the title and author name remain visible.
Reduce file size without losing too much detail
Choose JPG or WebP and lower the quality to reduce file size. Inspect small text and artwork after each change. PNG does not use the quality control. Larger dimensions cannot restore detail missing from the source image.
Where this fits in your writing workflow
Every store has its own cover requirements, and one good artwork needs several exports. Resizing and compressing here keeps the file sizes and dimensions in the ranges stores accept.
The book behind the cover is written in Webnovels AI — plan the story, draft, and revise with Bao, then export when it is ready.