https://publishing.co.uk/tags/upload-error/Recent content in Upload Error on publishing.co.uk — Professional KDP Book FormattingHugoen-gbTue, 02 Jun 2026 00:00:00 +0000https://publishing.co.uk/guides/kdp-error-pdf-wont-upload/Tue, 02 Jun 2026 00:00:00 +0000https://publishing.co.uk/guides/kdp-error-pdf-wont-upload/<p><em>Last reviewed by Robert Prime — June 2026</em></p> <blockquote><p><strong>Quick Answer</strong>: KDP rejects a PDF at upload for a handful of fixable reasons. The big one is <strong>fonts that aren't fully embedded</strong> — re-export your PDF with &quot;Embed all fonts&quot; on and the &quot;Do not embed common system fonts&quot; / &quot;Embed only the characters used&quot; boxes <strong>unchecked</strong>. Other common causes: the <strong>bleed setting in your PDF doesn't match the bleed option you selected in KDP</strong>, the <strong>file is too large</strong> (over 650MB) or the upload <strong>timed out</strong>, the PDF is <strong>password-protected or encrypted</strong>, or it's <strong>corrupted / contains live transparency</strong>. KDP emails you the specific failure reason — read that first, then fix and re-upload.</p>