How to Customize WhatsApp with Themes and Fonts: A Complete Guide
WhatsApp doesn't give you a theme store or a font picker buried in settings. That's the honest starting point. But there's more room to personalize the app than most people realize — if you know where to look and what's actually possible without putting your account at risk.
What WhatsApp Customization Actually Means
WhatsApp customization falls into two distinct categories: what the official app lets you change natively, and what requires going outside the app entirely. Knowing the difference saves you time and protects your account.
The official WhatsApp app offers a small but useful set of visual options: Dark Mode, chat wallpapers (per-chat and global), and in-chat text formatting like bold and italic. These are safe, stable, and work the same way whether you're on Android or iPhone.
Beyond that, Android users have a second layer of options through system-level font changes and launcher apps — these affect WhatsApp's appearance without touching the app itself. Then there's a third category: modded APKs like WhatsApp Plus or GB WhatsApp, which promise deep theme customization but carry serious risks we'll cover in detail later.
The capabilities on Android and iOS differ significantly. Android gives you more flexibility at the system level; iOS locks things down more tightly. Keep that in mind as you work through this guide.
How to Enable Dark Mode and Change the App's Color Scheme
Dark Mode is the closest thing WhatsApp has to a built-in theme change, and it's available on both Android and iOS. Enabling it switches the app's white interface to a dark gray and green palette that's easier on the eyes at night and can extend battery life on OLED screens.
On Android: Open WhatsApp, tap the three-dot menu in the top right, go to Settings → Chats → Theme. You'll see three options: Light, Dark, and System Default. Choosing "System Default" means WhatsApp will follow whatever your phone's system-wide dark mode setting is — convenient if you switch between modes regularly.
On iPhone: WhatsApp on iOS doesn't have an independent theme toggle. It follows iOS system appearance automatically. To switch to dark mode, go to your iPhone's Settings → Display & Brightness → Dark. WhatsApp will update immediately.
One thing worth knowing: you can't change WhatsApp's green accent color within the official app. The green header and chat bubbles are fixed. Dark Mode changes the background, not the brand colors.
How to Change Your WhatsApp Chat Wallpaper
Chat wallpaper is one of WhatsApp's most underused personalization features. You can set a different background image for every individual conversation, or apply one globally across all chats.
To change the wallpaper for all chats on Android or iPhone, go to Settings → Chats → Wallpaper. From there you can choose from WhatsApp's built-in wallpaper library, pick a solid color, or upload a photo from your gallery. The preview shows how it looks with both light and dark chat bubbles before you commit.
For a per-chat wallpaper — which is genuinely useful if you want to distinguish between conversations visually — open the specific chat, tap the contact name or group name at the top, then scroll to find the wallpaper option. This works on both platforms.
A practical tip: if you use a busy photo as a wallpaper, text readability can drop. WhatsApp automatically adds a slight overlay to keep chat bubbles legible, but high-contrast or abstract images tend to work better than detailed photographs.
How to Use Fonts and Text Formatting Inside WhatsApp Chats
WhatsApp has four native text formatting options you can use in any message, and most people who've used the app for years still don't know all of them. These work on both Android and iOS without any extra apps.
- Bold: Wrap your text with asterisks — *like this* — and it sends as bold.
- Italic: Use underscores on both sides — _like this_ — for italic text.
- Strikethrough: Add tildes — ~like this~ — to cross out text.
- Monospace: Triple backticks on each side — ```like this``` — switches to a fixed-width font, useful for code or structured text.
On mobile, you can also access these without typing symbols. Select the text you've typed, and a formatting toolbar will appear above the keyboard with bold, italic, and other options as tap buttons.
For sending messages in a completely different font style — not just bold or italic — some users install custom keyboard apps like Fonts Keyboard (available on both Android and iOS app stores). These apps let you type in stylized Unicode characters that look like different fonts. The catch: they're not real fonts, they're Unicode symbols, which means they may not display correctly on all devices and can sometimes appear as boxes or question marks for the recipient.
Customizing WhatsApp on Android with Launcher Apps and System Fonts
On Android, changing your device's system font can subtly affect how text appears inside WhatsApp — specifically in areas like the chat list and settings menus, though not always the message bubbles themselves. This approach modifies the app's appearance without touching WhatsApp at all.
How to change system fonts depends on your Android device. Samsung phones running One UI have a built-in font manager under Settings → Display → Font Size and Style, with a small library of fonts plus a download option. Pixel phones and stock Android don't offer this natively, but you can use a launcher app like Nova Launcher to change icon styles and some interface elements.
The honest limitation here: Android's system font change affects the operating system's UI, and WhatsApp only partially inherits it. You might see a different font in the app's menus but not in chat messages. Results vary significantly by phone model and Android version, so this is more of an experiment than a guaranteed fix.
iOS doesn't allow system-wide third-party font changes that affect apps like WhatsApp, so iPhone users don't have this option at all.
Third-Party Modded Apps — What You Need to Know Before Trying Them
Apps like WhatsApp Plus and GB WhatsApp offer extensive theme customization — custom colors, fonts, icon packs, and more. They exist, they work for some people, and they're genuinely tempting if you want visual control the official app doesn't provide. But the risks are real and worth understanding clearly before you download anything.
Account bans: WhatsApp's terms of service explicitly prohibit using modified versions of the app. The company actively detects unofficial clients and has issued waves of temporary and permanent bans to users running modded APKs. Your phone number — not just the app — gets flagged.
Security and privacy risks: Modded APKs are distributed outside the Google Play Store, which means they bypass Google's malware scanning. Independent security researchers have found data-harvesting code in several popular WhatsApp mods. You're granting an unofficial app access to all your messages, contacts, and media.
No updates or patches: When WhatsApp patches a security vulnerability, modded versions don't get the same update on the same timeline — if at all. You may be running software with known, unpatched exploits.
The bottom line: if deep theme customization is important to you and you're willing to accept these trade-offs, that's your call. But going in with clear eyes matters. For most users, the risks outweigh the visual benefits.
Quick Summary — What You Can and Can't Customize in WhatsApp
Here's a straightforward breakdown of what's actually on the table with the official app versus what requires workarounds.
Built into the official WhatsApp app (safe, works on Android and iOS):
- Dark Mode / Light Mode toggle
- Global and per-chat wallpapers (photos, colors, built-in library)
- In-chat text formatting: bold, italic, strikethrough, monospace
Available on Android via system settings or launcher apps (safe, limited effect on WhatsApp):
- System font changes (affects some WhatsApp UI elements, not messages)
- Launcher customization for home screen icons
Possible only with third-party tools (significant risks):
- Custom color themes (green header, bubble colors)
- Full font replacement inside the app
- Theme packs and icon customization within WhatsApp
Not possible at all, regardless of method:
- Official WhatsApp theme store (doesn't exist)
- Changing WhatsApp's core green branding within the official app
- Deep visual customization on iOS without jailbreaking
Frequently Asked Questions
Can I change the WhatsApp theme color without getting banned?
Within the official app, no — the green color scheme is fixed and can't be changed. The only safe "theme" changes are Dark Mode and chat wallpapers. Changing theme colors requires modded apps, which carry a real risk of account suspension under WhatsApp's terms of service.
How do I make text bold or italic in WhatsApp messages?
Type an asterisk on each side of your text for bold (*word*), or an underscore on each side for italic (_word_). On mobile, you can also select typed text and use the formatting toolbar that appears above the keyboard.
Does WhatsApp have an official theme store?
No. As of 2026, WhatsApp has no official theme store. Any website or app claiming to offer "official WhatsApp themes" is either referring to wallpapers or is a third-party service not affiliated with Meta.
Why don't font changes on my phone affect WhatsApp?
WhatsApp uses its own internal font rendering for chat messages and doesn't fully inherit Android system fonts. System font changes may affect some navigation elements in the app, but message text typically stays in WhatsApp's default font regardless of what you set at the OS level.
Is it safe to use WhatsApp Plus or GB WhatsApp for themes?
These apps carry three concrete risks: account bans (WhatsApp detects unofficial clients), potential malware in unverified APK files, and delayed or missing security patches. If you choose to use them, download only from sources with verifiable community reviews, keep backups of your chats, and understand that your account could be suspended at any time.