How to use AI assistant to automatically generate Excel tables and charts

Key points of this article

After letting the AI assistant connect to OmniDoc through MCP, you can directly generate or modify Excel files, eliminating the time of entering data cell by cell.
Write clearly the table header, field meaning, data range and chart type when issuing instructions, so that the generated results will be closer to what you want.
The generated files must check data sources, values and units item by item. Charts are only a display of data. If the data is wrong, the chart will also be wrong.
Charts can be inserted in Excel based on the generated data range, and the chart will be updated after the data is changed.

Many people organize a data table every week and then draw it into a bar chart or line chart. Manual entry, format adjustment, data area selection, and chart insertion are a set of processes that often take more time on repetitive work than the analysis itself. If your AI assistant can directly generate Excel files, you can leave this step to it. Excel tables are automatically generated by AI. The key is to let the assistant get clear instructions and reliable data instead of leaving all the work to it.

This article is written for people who often need to organize data and make reporting charts, such as operations, finance, teachers, and researchers. After reading, you will know how to connect the AI assistant to OmniDoc through MCP, let it generate Excel files with data, then use Excel to make charts, and know what to check after generation. Most manual drawing tutorials start with opening Excel, and the route here is to start with a description.

How to let the AI assistant directly generate Excel tables and charts? One sentence conclusion

First let the AI assistant generate an Excel file with complete data through MCP, and then insert a chart in Excel based on the data area; the data is provided or verified by you, and the chart type and format are fine-tuned after generation. The table below shows what to do in common situations.

your situation	Recommended practices	reason
The data is already in the chat or text, the amount is not large	Directly let the assistant organize the data into Excel tables	Manual entry is eliminated and errors are concentrated in the copying process, making it easy to check
Data comes from another Excel or PDF table	First organize the data into text or tables, and then let the assistant generate a new file	The assistant only processes content you explicitly give, and the source is clear
Need a standard chart for reporting	Let the assistant generate the data table, then insert and style the chart in Excel	Chart styles are more intuitive in Excel and easy to change.
Multiple forms with the same structure are required	Write a fixed format instruction, generate it one by one and check it uniformly	The instructions are consistent and the structure is consistent, which facilitates subsequent merging.
Data is sensitive or requires manual review	After generation, manually check item by item before deciding whether to use it.	The generated content needs to be confirmed and cannot be directly regarded as the final result.

Before you start: Confirm these points first

Confirmed AI Assistant supports MCP. MCP is a connection method that allows the AI assistant to call external tools. OmniDoc can serve as an MCP server to connect to MCP-supported AI assistants such as Claude and Cursor. If the assistant you are using does not support MCP, you cannot directly let it create Excel files. You need to use a supported method first.

Prepare the original data and write down the meaning of each column. What the assistant can process is the content you give it. If it just says "make a sales chart", it doesn't know which column is the month, which column is the amount, and whether the unit is yuan or ten thousand yuan. The more clearly the field names, units, and time ranges are written, the more reliable the results will be.

Think about the chart type and purpose. Trend changes are suitable for line charts, categories are more suitable for bar charts, and proportions are suitable for pie charts. Think clearly about what the diagram wants to express before telling your assistant, otherwise it can only be generated in a conventional way, which may not be in line with your reporting goals.

Confirm the file saving location and subsequent use. The generated Excel file needs to be opened, checked and saved by yourself. If you want to hand it over to others, try to think of the file name and table structure in advance to avoid major changes after generation.

Prepare a checklist in advance. Data sources, key figures, total results, units and time ranges are areas where errors can easily occur. Make a list of the items you want to check before you start, and you can quickly compare them after they are generated.

Steps to let AI assistant generate Excel files and insert charts through MCP

Connect to OmniDoc’s MCP service. Follow the instructions of the AI assistant you are using, add the MCP server provided by OmniDoc, and confirm that the assistant can see Excel-related tools. For the OmniDoc desktop client, visit download.omnidoc.top to download.
Organize the original data. Organize the data into tabular form and indicate the header, unit and time range. The more structured the data, the neater the tables generated by the assistant.
Describe the task in one sentence. For example: "Please generate an Excel file containing monthly sales from January to June 2024, listed as month and sales (yuan)." Write the table requirements and purpose together.
Specify the chart type and data area. Tell the assistant which column to use as the horizontal axis and which column to use as the vertical axis in the chart, for example, "Month will be used as the horizontal axis, sales will be used as the vertical axis, and a line chart will be made."
Let the assistant generate the file. Wait for the assistant to call OmniDoc to complete the creation of the Excel file, and note the location or name of the generated file.
Open the file and inspect the data. Open the file in Excel in desktop office software. First look at the header, values and totals to make sure there are no misalignments or missing items.
Insert charts in Excel. Select the generated data range, use Excel's insert chart function, and select the chart type you specify.
Adjust and save. Adjust the title, axis name and color according to the reporting needs, then save. If the data changes, make sure the chart updates accordingly.

Check each item after completion

AI-generated content requires human confirmation. Check the following items one by one, and most problems can be discovered before delivery.

Inspection items	How to see it	What should you do if there's a problem?
Headers and fields	Compare column by column with your requirements to confirm the names and order are correct	Add field descriptions in the command so the assistant can regenerate them
Check whether the values match the original data	A few rows were randomly selected and compared one by one with the original data	Return to the original data, correct it, regenerate it, or modify it directly in Excel
Total and average	Recalculate using Excel formulas and compare with the generated results	Manually correct and check for missing original data
Units and time ranges	View the units and start and end times in the header and header	After clearly informing the assistant of the unit and scope, regenerate it
Types of charts and axes	Confirm that the horizontal and vertical axes of the chart match what you imagined	Reselect the data area and chart type in Excel
Is the data updated?	Modify a value to see if the chart changes in sync	Check whether the data area referenced in the chart is correct

It is important to note that if the data comes from recognition results or machine translation, it must be checked item by item and cannot be used directly for formal reporting.

📊 Core Comparison

Method	Suitable situation	Main expenses
After manual entry, draw the diagram in Excel	The data volume is very small, or you need to fully control every detail yourself	Input and formatting take a long time
The AI assistant generates tables and then illustrates them in Excel	The data is already organized and needs to be quickly obtained with standard tables and charts	You need to write the instructions clearly and check the generated results item by item
Directly let AI generate chart descriptions without generating files	You only need to discuss chart ideas; no formal documents are needed	It cannot be used directly for reporting and still needs to be prepared manually

❓ Frequently Asked Questions (FAQ)

1. Can the Excel file generated by the assistant be used directly for formal presentations?

It is recommended to manually verify data, totals, and units before using them in formal settings. AI-generated content needs to be verified, especially regarding the amount, proportion, and time figures.

2. Can data be directly copied from PDF spreadsheets?

You can first copy the content from the PDF table, check the format, and then hand it to the assistant. If the PDF is a scan, the copy may be incomplete, so you need to first confirm whether the text is selected.

3. Do charts have to be made in Excel?

Not necessarily. You can also have the assistant generate other format files containing charts, but if you want to continue editing data in Excel, the direct way is still to insert charts into Excel.

4. What should I do if the generated table structure does not meet the requirements?

Add table headers, column order, units, and data ranges to the original command, then have the assistant regenerate them. The more specific the instructions, the closer the results are to your needs.

5. Can an AI assistant without MCP functionality do this?

Excel files cannot usually be generated directly. You can have the assistant output the organized table content, then copy it into Excel yourself and insert the chart.

📝 Summary

By connecting to OmniDoc via MCP, the AI assistant can participate in the entire process of automatically generating Excel spreadsheets, from data organization to file creation. The key is to clearly write instructions, verify results, and complete the final chart adjustments in Excel. By following the steps above, you can delegate repetitive table and chart work to assistants and focus your energy on the analysis itself.

Open OmniDoc and connect the document tool to your AI assistant