Supported file types, sizes & upload limits Reference

You can attach documents, spreadsheets, PDFs, and images to any message so the assistant can read, analyze, summarize, or extract data from them. This article lists the formats you can upload and the size and count limits that apply to each message.

Supported file types

The assistant accepts a range of common document and image formats. You can attach any combination of the following in a single message:

Documents and data

• PDF (.pdf) — for reports, proposals, contracts, and scanned documents
• Word documents (.docx)
• Spreadsheets (.xlsx) and CSV (.csv)
• Text and Markdown (.txt, .md)
• Structured data (.json, .xml)
• Web and log files (.html, .log)

Images

• PNG (.png)
• JPG / JPEG (.jpg)
• GIF (.gif)
• WEBP (.webp)

Attach an image and the assistant can describe it, answer questions about it, or pull text and details out of it.

Size and count limits

These limits apply to each message you send:

Limit	Value
Files per message	Up to 15
Size per file	Up to 20 MB each

If you need to share more than 15 files, or files that exceed the size limit, split them across several messages or compress large files before uploading.

Tip: Your uploads also count toward your account's overall storage. If you reach that limit, you'll see a "storage full" message. Remove files you no longer need, or move to a plan with more storage, to free up space.

How to attach files

1. Open the conversation where you want to share the file.
2. Click the paperclip icon in the message composer, or drag and drop your files directly onto the chat.
3. Select one or more files (up to 15) and wait for them to finish uploading.
4. Type your request — for example, "Summarize this PDF" or "Analyze the trends in this spreadsheet" — and send the message.

Every file you share in a conversation is listed in that chat's Files panel, so you can review or preview what's been uploaded at any time.

Where your files go

Uploaded files are stored securely and encrypted, and they stay tied to the conversation you shared them in. They're visible to you in the Files panel for that chat and are used only to help the assistant answer your request.

Troubleshooting uploads

An upload was rejected

Check that the file is one of the supported types listed above and is 20 MB or smaller. Files in unsupported formats, or larger than the size limit, won't attach.

You've hit the file count

Each message accepts up to 15 files. If you selected more, send them in batches across multiple messages.

"Storage full"

This means your account has reached its storage limit. Delete files you no longer need to free up space, or consider a plan with more storage.

Drag and drop isn't working

Make sure you're dropping files directly onto the chat area. If it still doesn't respond, use the paperclip button in the composer instead — you can select multiple files at once from there.

Note: The assistant can also create files for you — polished PDFs, spreadsheets, images, and charts you can download and reuse. Those deliverables don't count against your per-message upload limits.