Claude.ai allows PDF uploads up to 30MB per file. If your PDF is over the limit or causing context errors, compress it here first.
🔒 Files never leave your device⚡ Instant processing in browser💸 100% free — no signup
📄
Drop your PDF here to fix upload errors
or click to select file — PDF only
Target size (optional)
targeting 30 MB
⚡ Claude File Size Limits (Quick Fix)
•Claude.ai (web app) allows PDF uploads up to 30MB per file.
•Claude Projects allow unlimited files (30MB each) in the knowledge base — only files relevant to your query are loaded into the active context window.
•The Anthropic API supports up to 32MB per request via the standard Messages API, and up to 500MB via the Files API (beta).
•Amazon Bedrock (Claude) has a stricter limit of 4.5MB per document, with a maximum of 5 documents per request.
•PDFs packed with images consume tokens faster and may cause context overflow even if under 30MB.
👉 Fix: Compress your file below 30 MB using the tool above.
About this tool
Image-heavy PDFs consume tokens faster in Claude and may cause context overflow even under 30MB. Compressing image quality reduces both file size and token usage.
How to use this tool
Select or drag and drop your file into the tool above.
Adjust the settings or target size as needed for your specific requirement.
Wait a moment while your file is processed directly in your browser.
Download the final file safely to your device.
💡 Good to know
→Claude.ai (web app) allows PDF uploads up to 30MB per file.Claude Help Center ↗
→For best performance with visual analysis (charts, images), keep PDFs under 100 pages. Text-only PDFs can be larger.Claude Help Center ↗
→Claude Projects allow unlimited files (30MB each) in the knowledge base — only files relevant to your query are loaded into the active context window.Claude Help Center ↗
→The Anthropic API supports up to 32MB per request via the standard Messages API, and up to 500MB via the Files API (beta).Anthropic Docs ↗
→Amazon Bedrock (Claude) has a stricter limit of 4.5MB per document, with a maximum of 5 documents per request.AWS Docs ↗
→PDFs packed with images consume tokens faster and may cause context overflow even if under 30MB.
30MB per file for the Claude.ai web app and Projects. You can upload up to 20 files per conversation.Source: Claude Help Center ↗
Why does Claude say my PDF exceeds the context window even though it's under 30MB?+
Image-heavy PDFs consume far more tokens than text-only PDFs of the same size. A 30MB scanned PDF can exceed Claude's 200,000-token context window. Compressing images or splitting the PDF into smaller parts helps.Source: Claude Help Center ↗
How many pages can Claude handle in a PDF?+
For text-only PDFs, Claude can handle large page counts within the 200,000-token context window. For PDFs with charts or images, keeping it under 100 pages is recommended for best performance.Source: Claude Help Center ↗
What is the PDF limit for the Anthropic API?+
32MB per request via the standard Messages API. The Files API (beta) supports up to 500MB.Source: Claude Help Center ↗
What is the PDF limit for Claude on Amazon Bedrock?+
4.5MB per document, with a maximum of 5 documents per request — significantly stricter than the Claude.ai web app.Source: Claude Help Center ↗
What should I do if my PDF causes a context overflow error in Claude?+
Split the PDF into smaller topic-specific sections, compress image quality to reduce token usage, or convert image pages to text/Markdown format.Source: Claude Help Center ↗
🔒 Files stay on device·🆓 Free forever·📵 No signup required