How many files can you attach to Claude at once? Mine keep getting cut off

Answers 1

첫째StaffLv.67/28/2026
Hello, this is the operations team. To answer upfront: there are separate limits for file count and file size, and 8 files is well within the count limit. Here are the official limits: 1. You can attach up to 20 files in a single conversation message. 2. Each file can be up to 30MB. 3. PDFs with very high page counts (for example, over 1000 pages) may be rejected even if the individual file size is small. As you mentioned, 8 files is comfortably under the 20-file limit, and if each file is small, the 30MB per-file limit likely isn't the issue. If you're still hitting problems, here are some things to check: 1. The total combined size or processing load of all attachments might be too much for the client (web or app) to handle at once, causing a temporary crash. Even if individual files are small, processing 8 simultaneously can cause errors. 2. PDFs with lots of embedded images or scanned documents can create higher processing load. 3. It could be a temporary network or browser tab issue—refreshing and trying again often fixes it. If you can pinpoint exactly which file causes the failure each time, that helps narrow down the cause. For repeated tasks, uploading materials to your Projects beforehand and referencing just what you need in the conversation saves the hassle of uploading multiple times. For format-specific limits and common upload errors, see our detailed guide: https://usingclaude.com/ko/guides/troubleshooting/claude-app-faq-troubleshooting
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