How to Back Up and Restore Your WhatsApp Web Customization (2026)

You spent an evening getting WhatsApp Web exactly right. The theme is tuned, the font is the one you like, the background is calm, the clutter is hidden.

Then you get a new laptop. Or you clear your browser data. Or you reinstall Chrome. And it's all gone.

This is entirely avoidable, and it takes about two minutes to protect yourself. Here's what backs up cleanly, what you need to keep a copy of yourself, and how to restore everything on a new machine.

The Honest Version First

There is no single "export everything" button. Your customization lives in a few different places, and they back up differently:

What	Backs up how
Themes	Export as a JSON file. Perfect, complete, portable.
Custom fonts	Keep the original font file or the Google Fonts URL.
Background images	Keep the original image file.
Toggles (Minimal Mode, privacy blur, visibility settings)	Not exportable — but they take 30 seconds to re-enable.
Font size	Not exportable — one slider to redo.

The good news: the part that took you the longest — the theme — is the part that exports perfectly. The rest is either a file you already have or a switch you flip once.

Step 1: Export Your Themes (The Important One)

This is the backup that matters. A theme is a JSON file containing every color choice you made.

Open web.whatsapp.com → click the WhatsApp Web Customizer icon
Go to the Themes tab
Find your theme under Custom themes
Click Export / Download
A .json file lands in your Downloads folder

Do this for every custom theme you've built, not just the one you're currently using. Each one is a separate file, and each is a few kilobytes — you're not saving space by skipping any.

Where to keep them: anywhere that isn't only on this computer. A cloud drive folder, an email to yourself, a note, a Git repo if you're that kind of person. The whole point is surviving the loss of this machine.

A folder called whatsapp-themes in your cloud storage takes ten seconds to make and solves this problem permanently.

Step 2: Keep Your Font Files and URLs

If you uploaded a custom font through the Font Manager, the extension stores it locally. Clearing extension data removes it.

Two cases:

You uploaded a font file (TTF, OTF, WOFF). Keep the original file. Put it in the same folder as your themes. When you restore, you re-upload it.

You loaded a font by URL (Google Fonts or similar). Save the URL. Paste it into a text file next to your themes. Restoring is pasting it back in.

If you use a built-in font from the 500+ library, there's nothing to back up — it's always there.

More on the Font Manager in how to add custom fonts to WhatsApp Web.

Step 3: Keep Your Background Images

Same principle. If you set a custom background image, the extension stores it locally. Keep the original image file in your backup folder.

If you used a solid color, note the hex value. If you used an animated background, there's nothing to save — just remember which one.

Step 4: Write Down Your Toggles

The settings that aren't exportable are also the fastest to redo. Jot them in a text file with your themes:

Minimal Mode: on/off
Which visibility toggles you hid (Archive, Status, Channels, locked chats)
Privacy blur: on/off, and which elements
Font size: which step
Which font you're using

Five lines. It'll save you ten minutes of "wait, what did I have this set to?"

What a Complete Backup Looks Like

A folder, in your cloud storage:

whatsapp-web-backup/
  Midnight.json
  Deep-Focus.json
  my-custom-theme.json
  Inter-Variable.ttf
  background.jpg
  settings.txt

That's it. That folder fully restores your WhatsApp Web on any computer, in any browser, forever.

Restoring on a New Computer

Takes about three minutes:

Install the extension — WhatsApp Web Customizer from the Chrome Web Store, ~30 seconds
Open WhatsApp Web and link your phone as usual
Import your themes — Themes tab → Import → select each .json file. They reappear in Custom themes.
Re-add your fonts — Typography → Font Manager → upload the file, or paste the URL
Re-set your background — Backgrounds tab → upload your image or set your color
Flip your toggles back — Minimal Mode, privacy blur, font size, from your settings.txt

Apply the theme. You're back exactly where you were.

When You Actually Need This

People discover they needed a backup at bad moments. The common ones:

New computer. Obvious, and the one people plan for.

Clearing browser data. Easy to do accidentally while troubleshooting something unrelated — including, ironically, while fixing a WhatsApp Web loading problem. Clearing cookies and cached files for the site is a standard fix, and it can take your extension settings with it depending on what you clear.

Reinstalling the extension. Removing and reinstalling resets local storage. If you're ever troubleshooting a stubborn issue and the advice is "reinstall the extension," export your themes first.

Switching browsers. Chrome to Brave, Chrome to Edge. The extension works in all of them, but each browser profile has its own storage.

Switching machines during the day. Work laptop and home desktop. Import the same theme file on both and they match — which is also, incidentally, the easiest way to keep two computers looking identical.

Backup, Sharing, and Teams

The same JSON file that backs up your theme also shares it. Send it to a friend and they import it and get your exact look. Send it to your team and everyone matches.

That's not a coincidence — it's why themes are files rather than settings buried in browser storage. See how to share WhatsApp Web themes with friends.

If you built a theme worth keeping, it's probably worth sharing. Our Discord collects community themes.

A Note on What We'd Like to Improve

We'll be straight with you: a single "export all settings" button would make this whole article unnecessary, and we know it. Right now themes export cleanly and everything else needs a little manual care.

If that's something you'd value, say so in our Discord. Feature requests from actual users are how most of this extension got built — the font size control exists because one person asked for it.

The Bottom Line

Export every custom theme as a JSON file. Keep your font files, your background image, and a five-line note of your toggles. Put all of it in one cloud folder.

Two minutes now. Never lose your setup again — and restore it on any computer in about three minutes.

👉 If you haven't customized WhatsApp Web yet, install WhatsApp Web Customizer — free, open source. Then come back and back it up.

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