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.

Richard McSorley Richard McSorley Full-Stack Software Engineer with 8+ years building high-performance applications for enterprise clients. Shipped production systems at Walmart (4,000+ stores), Cigna (20M+ users), and Arkansas Blue Cross. 5 patents in retail/supply chain tech. Currently focused on AI integrations, automation tools, and TypeScript-first architectures. Jen Jacobsen Jen Jacobsen I’m a Full-Stack Developer with over 10 years of experience building modern web and mobile applications. I enjoy working across the full product lifecycle — turning ideas into real, well-built products that are intuitive for users and scalable for businesses. I particularly enjoy building mobile apps, modern web platforms, and solving complex technical problems in a way that keeps systems clean, reliable, and easy to maintain. Luca Liberati Luca Liberati I work on monoliths and microservices, backends and frontends, manage K8s clusters and love to design apps architecture Bastien Labelle Bastien Labelle Full stack dev w/ 20+ years of experience Dor Yaloz Dor Yaloz SW engineer with 6+ years of experience, I worked with React/Node/Python did projects with React+Capacitor.js for ios Supabase expert Kingsley Omage Kingsley Omage Fullstack software engineer passionate about AI Agents, blockchain, LLMs. Basel Issmail 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. My work focuses on modern web technologies, including TypeScript, Angular, Node.js, and cloud-based architectures. I enjoy solving complex technical problems and helping teams turn product ideas and prototypes into working platforms that can grow and scale. In addition to development, I often collaborate closely with product managers, business analysts, designers, and QA teams to ensure that solutions align with both technical and business goals. I enjoy working with startups and product teams where I can contribute both as a hands-on engineer and as a technical partner in designing and delivering impactful software. Antriksh Narang Antriksh Narang 5 years+ Experienced Dev (Specially in Web Development), can help in python, javascript, react, next.js and full stack web dev technologies. Costea Adrian Costea Adrian Embedded Engineer specilizing in perception systems. Latest project was a adas camera calibration system. Omar Faruk Omar Faruk As a Product Engineer at Klasio, I contributed to end-to-end product development, focusing on scalability, performance, and user experience. My work spanned building and refining core features, developing dynamic website templates, integrating secure and reliable payment gateways, and optimizing the overall system architecture. I played a key role in creating a scalable and maintainable platform to support educators and learners globally. I'm enthusiastic about embracing new challenges and making meaningful contributions.

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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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