Fix reading and formatting problems
Find the cause of mixed columns, broken paragraphs, missing pictures and awkward navigation. Each guide gives you a specific check to repeat against the original PDF, so you can distinguish a layout problem from missing content.
Name the problem before changing settings. Read the same passage after each attempt and keep the original PDF available for comparison.
Find the layer where the problem starts
Keep the original PDF beside an unchanged EPUB. If the visible PDF itself is unclear, improve the source before repairing the export. If the PDF looks correct but copied text is wrong, investigate recognition or text extraction. If the EPUB wording is correct but the page is awkward, look at paragraph structure or styling. If the problem appears only after importing into a reader, retain the original downloaded EPUB for comparison.
This order prevents a margin change from being mistaken for a missing-text repair.
Match the symptom to one repair
Short fragments at the same fixed positions suggest hard line breaks. Sentences that jump between neighbouring columns need a reading-order check. Missing words should be compared with the source before you insert anything. A contents link that lands in the wrong place is a navigation problem, even when the chapter text is present.
Use the saved research-paper source and actual conversion files to locate a real reading-order problem. For a repair, identify the passage in the original PDF before changing the EPUB; a suggested repair procedure is not proof that a converter produced the defect.
Stop when the correction no longer stays small
For one confirmed broken paragraph, save a copy and repair that passage. For hundreds of interrupted sentences, another conversion from the original PDF may cost less effort than a large search-and-replace operation. Try an EPUBTurn sample against the same passage before buying a full conversion. Keep intentional poem breaks, lists and compound hyphens out of a prose cleanup rule.
After any repair, check the preceding and following passage, notes and picture mentions. A clean-looking page is not enough if a paragraph disappeared.
Explore the guides
PDF to EPUB formatting: turn awkward pages into easier reading
Fix the reading problems that make converted PDFs frustrating: mixed columns, broken paragraphs and missing images. Find a better reading flow with EPUBTurn.
Read guidePDF to EPUB with images: keep the pictures that make the article useful
Keep diagrams, illustrations and captions useful when converting PDF to EPUB. See how EPUBTurn combines adjustable text with images near the related passage.
Read guideHow to fix broken line breaks in a converted EPUB
How to fix broken line breaks in a converted EPUB. Follow a worked repair with saved before-and-after files, then check the corrected copy in your reader.
Read guideHow to remove repeated headers and page numbers from EPUB
How to remove repeated headers and page numbers from EPUB. Follow a worked repair with saved before-and-after files, then check the corrected copy in your reader.
Read guideMissing EPUB chapters or wrong contents links? Check both
Search for chapter text, follow each contents link and check chapter endings with a downloadable navigation checklist before choosing a repair.
Read guideCheck an EPUB with EPUBCheck, then check the reading
Use EPUBCheck for structural errors, retain the exact report and inspect reading quality separately against the PDF.
Read guideSend to Kindle errors: separate transfer from conversion
Separate Send to Kindle delivery errors from conversion defects, preserve the submitted file and check after delivery.
Read guideHow to fix footnotes mixed into EPUB paragraphs
How to fix footnotes mixed into EPUB paragraphs. Follow a worked repair with saved before-and-after files, then check the corrected copy in your reader.
Read guideFind the cause of garbled EPUB text with a three-way check
Compare the visible PDF phrase, copied PDF text and exported EPUB text to locate a recognition, encoding or reading-order problem before repairing it.
Read guideHow to remove unwanted blank pages from EPUB
How to remove unwanted blank pages from EPUB. Follow a worked repair with saved before-and-after files, then check the corrected copy in your reader.
Read guideHow to restore missing paragraphs in a converted EPUB
How to restore missing paragraphs in a converted EPUB. Follow a worked repair with saved before-and-after files, then check the corrected copy in your reader.
Read guideHow to remove duplicated text from EPUB
How to remove duplicated text from EPUB. Follow a worked repair with saved before-and-after files, then check the corrected copy in your reader.
Read guideHow to fix missing spaces between EPUB words
How to fix missing spaces between EPUB words. Follow a worked repair with saved before-and-after files, then check the corrected copy in your reader.
Read guideEPUB ligatures: check search and copied text before changing letters
Distinguish a joined letter shape from an encoding error by comparing display, search and copied text. Preserve valid specialist and non-English characters.
Read guideBlurry EPUB images: identify where detail was lost
Compare small image features at readable size to distinguish missing detail from a thumbnail or display problem.
Read guideHow to keep EPUB diagrams readable in dark mode
How to keep EPUB diagrams readable in dark mode. Follow a worked repair with saved before-and-after files, then check the corrected copy in your reader.
Read guideHow to fix EPUB text that will not resize
How to fix EPUB text that will not resize. Follow a worked repair with saved before-and-after files, then check the corrected copy in your reader.
Read guideHow to fix excessive EPUB margins and indentation
How to fix excessive EPUB margins and indentation. Follow a worked repair with saved before-and-after files, then check the corrected copy in your reader.
Read guideHow to repair broken internal links in EPUB
How to repair broken internal links in EPUB. Use a published source to locate the problem, preserve a backup and check the saved copy in your reader.
Read guideHow to correct EPUB title and author metadata
How to correct EPUB title and author metadata. Use a published source to locate the problem, preserve a backup and check the saved copy in your reader.
Read guideHow to add or repair an EPUB cover
How to add or repair an EPUB cover. Use a published source to locate the problem, preserve a backup and check the saved copy in your reader.
Read guideHow to reduce EPUB file size without losing image detail
How to reduce EPUB file size without losing image detail. Use a published source to locate the problem, preserve a backup and check the saved copy in your reader.
Read guideWhy EPUB page numbers differ from the PDF
Larger text takes more screens, so EPUB page numbers can differ from the PDF.
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