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
Common Causes
- Server body size limit too small (default often 1MB)
- Client-side validation but server doesn't enforce same limit
- No chunked upload for large files
- Streaming upload not configured
- 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.
Caio Rodrigues
I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures.
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Matthew Butler
Systems Development Engineer @ Amazon Web Services
Simon A.
I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows.
Kingsley Omage
Fullstack software engineer passionate about AI Agents, blockchain, LLMs.
Victor Denisov
Developer
Basel Issmail
’m a Senior Full-Stack Developer and Tech Lead with experience designing and building scalable web platforms. I work across the full development lifecycle, from translating business requirements into technical architecture to delivering reliable production systems.
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SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Jared Hasson
Full time lead founding dev at a cyber security saas startup, with 10 yoe and a bachelor's in CS. Building & debugging software products is what I've spent my time on for forever
MFox
Full-stack professional senior engineer (15+years). Extensive experience in software development, qa, and IP networking.
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I am a Strategic Engineering Leader with over 8 years of experience building high-availability enterprise systems and scaling high-performing technical teams. My focus is on bridging the gap between complex technology and business growth.
Core Expertise:
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You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently 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