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RESOURCES / HOW TO FIX

Repair one verified problem at a time.

Canonical procedures with a defined starting problem, ordered correction steps, and a verification finish line.

01

How to fix a KDP interior trim-size mismatch

Problem: KDP reports that the uploaded interior dimensions do not match the selected trim.

  1. Record the exact KDP trim and bleed setting.
  2. Measure every PDF page box in points or inches.
  3. Correct the source document page size and margins.
  4. Export again with the intended bleed and no printer marks.
  5. Recheck all pages before uploading the replacement.

Verification: Every page has the same intended geometry, required bleed reaches the BleedBox, and live content stays inside the safe margin.

02

How to fix EPUBCheck errors without causing new failures

Problem: An EPUB produces multiple errors and warnings that appear unrelated.

  1. Save an untouched backup.
  2. Run the current EPUBCheck version.
  3. Fix container and package errors first.
  4. Fix XHTML, CSS, navigation, and link errors next.
  5. Rerun after each repair group and compare the report.

Verification: The final package opens in multiple reading systems and the validation report contains no unresolved errors.

03

How to fix unembedded fonts in a print PDF

Problem: A printer flags one or more fonts as unembedded or substituted.

  1. Inventory fonts and embedding status.
  2. Confirm license embedding rights.
  3. Replace fonts that prohibit embedding.
  4. Export with font embedding enabled.
  5. Compare line breaks, glyphs, and page count against the approved source.

Verification: Every used font is embedded or safely converted, with no missing glyphs or reflow.

04

How to clean a DOCX before ebook conversion

Problem: Conversion introduces irregular spacing, blank pages, or broken chapter navigation.

  1. Work from a copy and reveal formatting marks.
  2. Replace manual line breaks and spaces with styles.
  3. Use heading styles for chapter titles.
  4. Remove unsupported floating objects and text boxes.
  5. Convert and inspect the resulting EPUB structure.

Verification: Chapter navigation, paragraph spacing, scene breaks, images, and reading order remain consistent.

Test a sample before changing a production file.

The validator playground demonstrates common checks without uploading your manuscript.

Open validator playground →