Since the file upload feature was enabled in ChatGPT Plus (GPT-4.5 or GPT-4o), the relationship between users and AI assistants has completely changed. It's no longer just about typing prompts, but about collaborate by submitting your documents directly.
Practical use cases
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Automatic summarization of long documents
Upload a 100-page PDF and request:“Summarize the key ideas by chapter in list format, including highlighted quotes.”
Reading time is drastically reduced. -
Data analysis in spreadsheets
Upload an Excel file with your sales metrics and ask:“Which month had the best performance by region? Make a comparison table.”
You don't need to know formulas or advanced Excel. -
Structured data extraction
From a contract or a report you can extract tables, key dates or even generate legal or administrative response templates. -
Translations with real context
Translate an entire document while preserving the tone and formatting, not just word for word.
What formats does it support?
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PDF, DOCX, TXT, CSV, XLSX, among others.
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You can also combine multiple files into a single analysis.
📎 Technical note : The ability to correctly "read" a file depends on its proper structure. If you have a scanned PDF without selectable text, you should first convert it to editable text.
👉 If you want to go further, check out our article on the deep research function .