{"versionId":"c67bdc0d-8240-450b-169a-08dea5e73a33","articleId":"6964bf09-f444-496e-2cb0-08dd98204e3f","title":"Files in Theta Assist","tags":["Working with files","All articles"],"content":"

There are two broad categories of files used in Theta Assist - assistant files and message files.

\n
\n

In this article...

\n\n
\n

Excel support

\n

Excel (.xlsx) and CSV files can be added to a conversation as message files, but they are not supported as assistant files in the assistant Files tab.

\n

Message files

\n

Message files are thread-specific, and added to a single conversation using the paperclip icon. They can be used by your assistant to formulate its responses, and remain within a thread (conversation).

\n

Message files and privacy

\n

Message files are private to you and your conversation, unless:

\n
    \n
  1. You have shared the thread. Learn more about sharing.
    2. \n
  2. The assistant has memory enabled. Learn more.
    3. \n
\n

Types of message file

\n

There are two types of message file:

\n
    \n
  1. Attached file. Supported file types include: .c, .cs, .cpp, .doc, .docx, .html, .java, .json, .md, .pdf, .php, .pptx, .py, .rb, .tex, .txt, .css, .js, .sh, .ts, .vtt, .xlsx, .csv and xml
    For image files, the supported formats are .jpeg, .jpg, .png, .gif (static only), and .webp
    2. \n
  2. Web page. Add via URL and the assistant will process the page and use the info in its response.
    3. \n
\n

How to add a message file to a conversation

\n
    \n
  1. To add any file attachment to your conversation, click the paperclip icon in the message and select the file/s you'd like to add.
    2. \n
  2. To add a web page, click the link icon and enter the URL of the page you would like to add.
    3. \n
\n

\n

Assistant files

\n

Assistant files are uploaded in the assistant Files tab and are used as a reusable knowledge base.

\n

Assistant files do not support Excel or CSV uploads. If you want to use an Excel or CSV file in a conversation, attach it as a message file instead.

\n

How to add assistant files

\n

Pre-requisite: You need to be the owner of an assistant or have edit access.

\n

Add assistant files via files via the Files tab when editing an assistant.

\n

 

\n
\n

Other sources of assistant files

\n\n

Supported file types

\n\n

Learn more

\n

Learn more about adding assistant files in this advanced feature tour.

\n
\n
Theta Assist Advanced Feature Tour Storylane
\n
\n

Tips for working with files

\n

Images and data files (e.g. excel, csv) can only be added as message files. They are available to the whole thread, but not across threads. 

\n

The maximum file size is 512 MB

\n

 

","description":"Learn how files work in Theta Assist, including the difference between message files and assistant files, which file types are supported, and how to add files to a conversation or assistant.","isMarkdown":false,"publishedOnUtc":"2026-05-04T04:45:42.8061297","modifiedOnUtc":"2025-05-27T23:06:34.5845451"}