KDP Manuscript Not Uploading: File Format And Size Issues
This guide covers the most common reasons your KDP manuscript won’t upload, from file format rejection to hidden corruption in your document. You’ll discover exactly which file types KDP accepts, how to compress images, and when account restrictions block uploads.
You click upload and nothing happens. You wait five minutes and still see the spinning wheel. The file seems fine on your computer but KDP refuses to accept it. The first step is to check your file type and size before you try anything else.
Why Your File Type Causes Instant Rejections
KDP accepts DOC, DOCX, HTML, MOBI, EPUB, RTF, and plain text files. You cannot upload PDFs for most eBook categories. This catches many authors off guard because PDFs look perfect on screen.
The platform needs to reflow text for different devices. PDFs lock everything in place. Kindle readers can’t adjust font sizes or margins with a PDF source file. KDP rejects them during the upload process without much explanation.
If you saved your manuscript as a PDF, go back to your word processor. Export it as a DOCX file instead. This solves most upload failures immediately.
EPUB files sometimes cause problems too. Some programs create EPUBs with errors in the code. KDP’s system spots these errors and stops the upload. You see a generic error message without details about what went wrong.
The safest choice is DOCX from Microsoft Word. KDP handles these files better than any other format. You avoid most technical problems by starting there.
File Size Limits Nobody Mentions Upfront
Your manuscript file cannot exceed 650 megabytes. Most text-only books sit well under one megabyte. Images push the size up fast.
Say you inserted fifty high-resolution photos into your cookbook. Each image is five megabytes. Your file now weighs 250 megabytes or more. KDP might accept it but the upload takes forever and often fails partway through.
Compress your images before you insert them into your document. Reduce each photo to 300 DPI or lower. Save them as JPG files instead of PNG or TIFF formats.
You can cut file size by seventy percent without visible quality loss. Readers won’t notice the difference on a Kindle screen. The upload completes in minutes instead of timing out.
Check your actual file size before you attempt the upload. Right-click the file on your computer and look at the properties. Anything over 100 megabytes deserves a second look and probably needs compression.
Browser and Connection Issues That Block Uploads
Chrome works best with KDP in 2026. Firefox and Safari cause occasional glitches. Edge usually works fine but some users report stalled uploads.
Clear your browser cache before you try uploading again. Old cached files sometimes interfere with the upload process. You think you’re uploading a new file but the browser serves stale data.
Disable browser extensions temporarily. Ad blockers and privacy tools sometimes block the scripts KDP needs to process uploads. Turn them off for just the KDP session and see if the problem disappears.
Your internet connection matters more than you’d expect. A slow or unstable connection drops the upload halfway through. You see a spinning wheel for twenty minutes and then an error message appears.
Try uploading during off-peak hours. Late evening or early morning often works better. Fewer people use the KDP servers at those times. Your upload gets through faster and completes without interruptions.
Switch from WiFi to a wired connection if you can. This eliminates most connection drops. If you must use WiFi, move closer to your router before starting the upload.
Hidden Formatting Errors That Stop the Process
Corrupt characters inside your document cause uploads to fail silently. You copied text from a website or PDF and invisible junk code came along. KDP’s system chokes on these characters and refuses the file.
Open your document and search for special symbols. Look for smart quotes, em dashes, and unusual spacing. Replace them with standard keyboard characters. This fixes many mysterious upload failures.
Embedded fonts sometimes create problems too. Your document references a font KDP doesn’t recognize. The upload starts but fails during processing. Stick to common fonts like Times New Roman, Arial, or Garamond.
Tables and text boxes cause headaches. KDP struggles to convert these elements cleanly. Remove complex formatting before you upload. Use simple paragraph breaks and standard indents instead.
Track changes and comments in your Word document must go. Turn off track changes and delete all comments before export. These hidden elements bloat the file and confuse KDP’s conversion system.
When KDP Manuscript Not Uploading Means Account Problems
Your KDP account might have restrictions you don’t know about. Amazon flags accounts for various reasons without clear notification. You can’t upload until you resolve the account issue.
Log out completely and log back in. Check for any warning messages or action items on your dashboard. Amazon sometimes requires tax information updates or identity verification before you can upload new content.
Payment holds affect your ability to upload in rare cases. If Amazon suspects fraud or policy violations, they freeze account functions. You need to contact support directly to fix this.
Try uploading from a different device entirely. Sometimes the problem ties to your specific computer or login session. Use a laptop instead of a desktop or vice versa.
Create a test account with a different email address if you suspect account problems. Try uploading a simple one-page document. If it works on the new account but not your main one, you’ve found your answer.
The Nuclear Option When Nothing Else Works
Copy your entire manuscript into a fresh blank document. Don’t use copy and paste for the whole thing at once. Copy it section by section into the new file.
This strips out hidden corruption from your original file. You rebuild everything cleanly without the baggage. It takes time but solves problems no other method touches.
Save the new document with a different filename. Export it as DOCX from scratch. Then attempt your upload again with this completely fresh version.
Contact KDP support if you’ve tried everything and still face upload failures. They see your specific error logs on their end. Support can tell you exactly what’s breaking in ways you can’t diagnose yourself.
Wait twenty-four hours before trying again. KDP’s systems sometimes have temporary glitches. A server issue on their end looks identical to a problem with your file. Patience occasionally solves what troubleshooting cannot.
Upload a completely different test file to verify the system works. Create a one-page document with just a title and a paragraph. If that uploads fine, the problem lives in your main manuscript file. If the test file also fails, the issue sits elsewhere.
Frequently Asked Questions
What file format does KDP accept for manuscript uploads?
KDP accepts DOC, DOCX, HTML, MOBI, EPUB, RTF, and TXT files. DOCX from Microsoft Word gives you the fewest problems. PDFs don’t work for most eBook uploads because they can’t reflow text.
How long should a manuscript upload take on KDP?
A text-only manuscript under five megabytes uploads in under two minutes. Books with images take longer depending on file size. Anything over ten minutes suggests a connection problem or file issue.
Can I upload the same manuscript file multiple times?
Yes, you can replace your manuscript file as many times as needed. KDP lets you upload new versions before publishing. Each new upload overwrites the previous file completely.
Why does my upload fail at 99 percent complete?
This usually means a formatting error deep in your file. KDP processes everything fine until it hits corrupted text or bad code. Copy your content into a fresh document and try again.
Does KDP have a file size limit for manuscripts?
The maximum file size is 650 megabytes for manuscripts. Most text books stay under five megabytes. Compress your images if your file exceeds 100 megabytes to avoid upload timeouts.
Download your manuscript as a fresh DOCX file, compress any images to under 300 DPI, clear your browser cache, and try uploading again using Chrome.
