Bolt api

File Upload Exceeds Size Limit - Large File Rejection

Users get errors when uploading files larger than limit. Upload fails even though file size seems reasonable.

Errors: 'payload too large', '413', or upload hangs indefinitely.

Error Messages You Might See

413 Payload Too Large Request entity too large File exceeds maximum upload size Upload failed - out of memory
413 Payload Too LargeRequest entity too largeFile exceeds maximum upload sizeUpload failed - out of memory

Common Causes

  1. Server body size limit too small (default often 1MB)
  2. Client-side validation but server doesn't enforce same limit
  3. No chunked upload for large files
  4. Streaming upload not configured
  5. Temporary file storage full

How to Fix It

Increase server limit: in Next.js middleware or server config

Add client validation: show error before uploading if file too large

For large files: implement chunked upload (send 1MB chunks, reassemble server-side)

Use multipart/form-data with streaming: don't load entire file in memory

Monitor disk space: ensure temp storage has enough room

Real developers can help you.

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Frequently Asked Questions

What's reasonable file size limit?

Small files: 5-10MB. Medium: 50-100MB. Large: use chunked upload

How do I implement chunked upload?

Split file into 1MB chunks client-side. Upload each chunk. Server reassembles when all received

Should I validate size client-side?

Yes for UX (error before upload). Also validate server-side for security

Related Bolt Issues

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