# Getting Started with the Keyline App

The fastest way to understand Keyline is to upload a document and ask it a question. This
page walks through that first upload in the Keyline app, what happens behind the scenes,
and where to start reading once it is done. To do the same thing from your own code
instead, start with the [Keyline API quickstart](/docs/keyline/api-quickstart).

## Upload your first document

Open your library in the app and choose the upload option, then pick a file from your
computer.
Keyline accepts PDF, PNG, JPEG, and Office files (DOCX, XLSX, PPTX, DOC, XLS, PPT).
Preliminary per-file size and page limits apply. Once the file starts uploading, you will see a
progress indicator while Keyline processes it.

## What happens after you upload

Uploading a file does two things at once:

1. **Analysis.** Keyline reads every page as an image, so the figures, diagrams, and
   tables on it are understood alongside the text.
2. **Indexing.** Keyline builds a search index for the file so it can be found later, both
   on its own and as part of a [multi-file search](/docs/keyline/multi-file-search) across
   your whole library.

Both steps run automatically. You do not need to do anything else once the upload starts;
Keyline shows progress and the document becomes readable as soon as processing finishes.

## Where to start reading

Once a document finishes processing, open it to reach the PDF view, where you can page
through the document and start a conversation about it. See
[Reading and analyzing PDFs](/docs/keyline/reading-pdfs) for how the page view works, or
jump straight to [Conversations and citations](/docs/keyline/conversations-and-citations)
to start asking questions.