What works without a network
- Typing, pasting, and opening files.
- The live preview, tables, task lists, footnotes, and code colors.
- Alert blocks, emoji shortcodes, and the front matter table.
- Insert contents, page numbers, paper size, and margins.
- Download PDF and Save as PDF.
What needs a network first
Diagrams and formulas use extra code that loads the first time a document has one. Draw one diagram or one formula while you are online, and it stays available for that visit. Images you link from the web also need a network.
This page is not an installable app, and it does not keep itself after you close the tab. If you want to work somewhere with no signal, open the page first, and keep the tab open.
Why it needs no server
The Markdown is read by code in your browser. Your browser also draws the pages and writes the PDF with its own print feature. There is nothing to call. That is why no text is uploaded, and why there is no daily limit.
A quick test
- Open the page and wait for the sample to show.
- Turn on airplane mode.
- Edit the text. The preview keeps updating.
- Press Download PDF. The print window opens as normal.