Claude File Upload Failed
Quick answer
Uploads fail from oversized files, unsupported formats or exceeding context. Reduce the file, convert it, and wait for upload to finish.
Most likely fix: Check size and format
How to fix it
Try these in order — the most common fix is first.
1. Check size and format
- Try a smaller file or convert to PDF or text
- Split large documents
Did this fix it?2. Wait for completion
- Keep the dialog open until the file shows as added
Did this fix it?3. Retry
- Refresh and re-upload
- Try another browser or the desktop app
Did this fix it?
Symptoms
Upload spinner never finishes or an error appears.
Why it happens
- File too large or unsupported format
- Navigating away before upload completes
- File exceeds context window
This guide also covers
- claude file upload failed
- claude can't upload pdf
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