If your PDF conversion failed, here are common causes and solutions.
Symptom: Error "Password required" or "Encrypted PDF"
Solution:
Symptom: Error "Invalid PDF" or "Cannot read file"
Solution:
Symptom: Error "File size exceeds limit"
Solution:
Symptom: Error "Unsupported file format"
Solution:
Symptom: Upload or download freezes
Solution:
Symptom: Page freezes or crashes
Solution:
Symptom: Long processing time or timeout
Solution:
File has security restrictions. Use Decrypt PDF tool.
File too complex or server busy. Try smaller file or retry later.
PDF is corrupted or malformed. Try repairing with Adobe Acrobat.
Very old or very new PDF format. Try re-saving in compatible version.
File too large or complex. Compress or split first.
If none of these solutions work:
Complete guide to file formats supported by FunPDF - PDF, Word (DOCX/DOC), Excel (XLSX/XLS), PowerPoint (PPTX/PPT), images (JPG, PNG, TIFF, WebP, BMP, GIF), HTML, Markdown, TXT, and URLs. Learn input/output format compatibility and conversion options
Understanding file size limits and processing modes - synchronous processing for small files, asynchronous background processing for large files with real-time progress tracking and automatic file deletion
Complete guide to understanding PDF processing speed - learn why processing is slow, how file size and complexity affect speed, optimization tips to speed up conversions, and expected processing times for different operations
Complete guide to uploading files to FunPDF editor - drag and drop, file picker, multiple files, and troubleshooting
Our support team is ready to assist you with any questions or issues.