Can I write a novel offline in a browser app?

What "offline mode" usually means

A web app is code that arrives from a server each time you open it, so by default it needs a connection. An app with an offline mode keeps two things on your machine instead: a copy of the program itself, and a copy of your work in the browser's own storage. Edits made without a connection wait in that local copy and go up to the server once you are back online.

The details are where apps differ, and they are worth checking before a flight rather than during one. Most offline modes share the same catches:

• You have to have opened the app, and often the document, while online on that device.
• A private or incognito window keeps nothing once it closes.
• Clearing site data, or deleting the browser profile, deletes the local copy with it.
• Some features, usually sharing and account settings, stay online-only.

The honest test is simple. Turn off Wi-Fi at home, open the manuscript, type a paragraph, and close and reopen the tab. If the paragraph survives, you can trust it on a train.

Setting up Google Docs offline

Google Docs works offline in Chrome and Microsoft Edge, and it needs setting up in advance.

1. Use Chrome or Edge in a normal window, not a private one, signed in to your Google account.
2. Install the Google Docs Offline extension from the Chrome Web Store.
3. In Google Drive, open Settings and turn on the Offline setting, which lets recent files be created and edited on that device.
4. For the manuscript itself, open it and choose File → Make available offline, or open its three-dot menu on the Docs home screen and switch on Available offline.

Only one Google account per browser profile can have offline turned on, so a second account needs a profile of its own. Google also warns that very large files may fail to sync. Do the Wi-Fi test afterwards.

Keeping a copy that is really yours

Whatever app you write in, an offline mode is a convenience rather than a backup. Download the manuscript as a Word file or plain text at every milestone and keep it somewhere that does not depend on the browser, such as a folder on your disk or a USB stick. In Google Docs that is File → Download → Microsoft Word (.docx). It takes seconds.

In Tabularia

Tabularia was built to write in a browser without a connection. After you have signed in and opened it once on a device, it reopens the manuscripts stored there offline. Writing, autosave, and export all keep working. Nothing needs switching on per document. You can also install it as an app with its own window, and the offline shell comes with it.

The limits are spelled out in Writing offline. First sign-in needs a connection, as do sharing and billing, and a manuscript that lives only in the cloud has to be downloaded to the device before a trip. A typeset PDF exported offline can come out in plain manuscript format instead of your designed page, because its fonts are fetched at export time. And signing out stops the device offering that account offline until you sign in again, though the local copy is kept. So stay signed in if you are about to lose the connection.

The same storage caveat applies here as anywhere: work lives in that browser profile, and clearing it can remove it. Exporting a DOCX at milestones is still the habit to keep.