AI for Working With Excel and PDF Files Locally — No Cloud Upload
How to process spreadsheets and documents with AI right on your own computer — extract data, merge, and check Excel, PDF, and Word files without uploading them to someone else's cloud.
Most AI services for working with documents work the same way: upload a file to their server, get an answer back. For work spreadsheets and contracts, that's not a great idea — the data ends up who knows where. Here's how to work with Excel, PDF, and Word files through AI locally, with nothing uploaded anywhere.
What's wrong with cloud services
When you drop a payroll spreadsheet or a contract into an online chat, the file ends up on someone else's server. Even if the service promises to delete it, you've already lost control. For trade secrets and personal data, that's not acceptable.
A local agent solves this at the root: files get processed on your computer and never get sent anywhere.
What an agent can do with files
Using Doka — a desktop agent for Windows and Mac — as the example:
- Extract data. Pull key figures, dates, and terms out of a PDF or Word file, and merge them into one.
- Go through folders. Work through dozens of files, find what you need, compare versions.
- Work with spreadsheets. Read data, compute, find discrepancies between two tables.
- Check documents. Find inconsistencies in a contract, reconcile an estimate against actuals.
Doka reads attached PDF, Word, and text files directly, and works with spreadsheets and entire folders through filesystem access in your chosen working folder.
For heavier spreadsheet processing, the agent can run a command in the terminal — computing something with a script, for instance. All of this happens on your own machine, files never leave the computer.
Why this matters especially for documents
Contracts, cost estimates, accounting exports, customer spreadsheets — this is the most sensitive material in any job. These are exactly the files you'd want AI's help with, and exactly the ones you're most afraid to send to the cloud. Local processing removes that choice: you get the convenience of AI without risking the data.
And if the task is genuinely confidential, connect a local model, and even the AI itself runs offline, with no internet.
How to start
- Download Doka and install it. The model installs automatically.
- Pick a working folder with your documents above the chat box, or attach a file with the paperclip.
- Describe the task in plain language: "compare these two estimates and show me where they differ."
The bottom line
AI for documents doesn't have to go through the cloud. A local agent reads Excel, PDF, and Word files, merges spreadsheets, and checks contracts right on your computer — as convenient as an online service, except the files never leave. Download Doka for free.