Make your Canva PDF fit your book.
Check the page size, crop marks and inside margin against Amazon KDP's paperback rules, then download a corrected interior.
If the pages come out cropped wrongly
Your PDF never leaves your browser.It is read and rebuilt on this device. Nothing is uploaded.
Report
| Check | Your file | What the fix does |
|---|
Pages that need a look
First 4 corrected pages
Clean pages, no watermark.trim linesafe area for text
Margins are measured from live text; pictures, lines and shapes that end inside a margin are listed as a note. The fix does not embed fonts, sharpen pictures or reflow text. Rules read from the official KDP help pages on 10 November 2026. This is an information tool, not professional advice, and not an approval.
What the fix does
- Removes crop marks. Each page is cropped to its trim area, so the marks and the extra paper around them go.
- Sets the exact page size. Every page becomes the trim size you chose, plus 0.125 in bleed if you chose bleed.
- Makes room at the spine. Odd pages move right and even pages move left until the inside margin (the gutter, the strip next to the binding) is wide enough for your page count.
- Evens the page count. One blank page is added at the end if the count is odd.
- Checks its own work. Every corrected page is rendered and measured again. If it does not match the plan, no file is offered.
- Gives you a pass/fail sheet. The result of that second measurement, written down.
What it does not do
- Fonts. It reports fonts that are not embedded but cannot embed them.
- Picture resolution. It cannot sharpen a low-resolution picture, and does not measure resolution.
- Text reflow. It never re-wraps or resizes your text. If a page has no room to move, the report says which page to change in your design.
- Covers. Interior pages only.
- Approval. Only the print service decides. Always check the corrected file in its previewer.
Price
Free during launch: checkout is not open yet, so the full corrected PDF costs nothing today. The report and the first 4 corrected pages are always free.
Answers
- Canva PDF rejected by KDPThe four file causes and which ones a fix can repair
- Canva and the KDP gutter marginHow wide the inside margin must be and how to get it
- Remove crop marks from a PDF for KDPTwo ways, with the page size each one leaves
- KDP trim size does not match the PDFRead the two numbers in the error and find the cause
- 6 x 9 in, 300 pages: inside marginThe exact numbers, with a diagram
- KDP margin calculatorAny trim size, page count and bleed
- Margin guide templatesFree PDF and SVG overlays at true size
- Page size with bleedAll 16 trim sizes in in, mm and px
Questions
Is my book uploaded anywhere?
No. The PDF is opened, measured and rebuilt inside your browser on your own device. Only anonymous counts (for example "a 6 x 9 file was checked") are sent, never the file, its name or its text.
What exactly does the fix change?
It crops each page to the trim area (which removes crop marks), sets every page to the exact trim size (plus 0.125 in bleed if you chose it), moves odd pages right and even pages left when the inside margin is too small for your page count, adds one blank page if the count is odd, and removes links and bookmarks. Fonts, pictures and wording are left as they are.
What does it not fix?
It does not embed fonts, raise picture resolution, or reflow text. If text sits too close to the top, bottom or outside edge, or there is no room to move a page, the report tells you which pages to change in your design.
Will the corrected file be accepted?
Nobody but the print service can promise that. Every page of the corrected file is rendered and measured again, the download is held back if it does not match the plan, and the pass/fail sheet shows the result. The print previewer is still the final check and may test things this tool does not.
How are the margins measured?
From the live text on each page. Pictures, lines and shapes that end inside a margin are listed as a note, not a failure, and a page that is one flat picture is measured from its pixels or reported as not measured. Check those pages by eye in the print previewer.
Which rules does it use?
Amazon KDP paperback rules as published in the official help pages, read on 10 November 2026: 16 US trim sizes plus a custom size (width 4 to 8.5 in, height 6 to 11.69 in), bleed of 0.125 in, and an inside margin from 0.375 in to 0.875 in depending on page count. Page-count limits are checked per trim size; no limit table is published for custom sizes.
Does it work for a cover?
No. It is for the inside pages (the interior) only.
What does it cost?
The fix will be $5 per file, or $12 for 30 days of unlimited re-fixes. Checkout is not open yet, so the full fix is free during launch. The report is always free.