How To Create Custom Emoji: A Simple Guide for Every Device

Custom emoji let you turn inside jokes, brand icons, and personal photos into tiny, reusable reactions. Instead of hunting for the “closest match” in the standard emoji set, you can make your own faces, objects, and stickers that feel like you.

This guide walks through how custom emoji work, the different ways to create them, and what actually changes from one device or platform to another. By the end, you’ll know the options and trade-offs well enough to decide what fits your setup.

What “Custom Emoji” Really Are

When most people say “custom emoji,” they may be talking about slightly different things:

• True emoji-like graphics built into a chat app (Slack, Discord, etc.)
• Stickers or images you can quickly insert in messaging apps
• Personal avatar emoji sets (like Bitmoji-style faces)
• Custom keyboard icons you can use across apps

Under the hood, though, custom emoji are usually just small image files (often PNG or WebP) that are:

• Sized small (often 128×128 px or less)
• Stored in a specific app or on a server
• Inserted during chats like regular emoji, but technically sent as images or special codes

They are not added to the global emoji standard (called Unicode). That standard is what decides which emoji all platforms share. Your custom emoji may:

• Work only in one app (e.g., Slack workspace)
• Work only on one device (e.g., custom keyboard on your phone)
• Or sync inside one platform ecosystem (e.g., Discord servers)

Understanding that scope is important before you start designing.

Common Ways To Create Custom Emoji

Most people use one of four main approaches:

1. Built-In Custom Emoji in Chat Apps

Some apps let you upload your own emoji directly:

• Slack-style custom emoji
  • You upload a small image (often square, under a file-size limit).
  • The app assigns it a shortcode like :partyparrot:.
  • Typing that code inserts the emoji in your messages.
• Discord server emoji
  • Similar idea: upload an image, give it a name, and use it in chats within that server (and sometimes across others, depending on permissions).

Typical steps:

1. Prepare an image
   • Transparent background (PNG) works best.
   • Keep it simple and high contrast — it will display tiny.
2. Open your chat app’s emoji settings
   • Look for something like “Custom Emoji,” “Emoji & Stickers,” or “Server Settings”.
3. Upload, name, and save
   • Choose a short, memorable name.
4. Test it in a message
   • Make sure it looks good at normal chat size.

These feel the most “emoji-like,” but they’re tied to the specific app or server.

2. Custom Stickers in Messaging Apps

Apps like WhatsApp, Telegram, iMessage, and others rely heavily on stickers, which function similarly to emoji but are technically just images sent in a special format.

Typical flow:

1. Design a set of images
   • Usually PNG or WebP, with a transparent background.
   • Many platforms like packs of multiple stickers.
2. Import them via a sticker tool
   • Some apps have built-in sticker makers.
   • Others use third-party apps to convert images into sticker packs recognized by the messaging app.
3. Use them like emoji
   • They show up in your sticker panel, ready to tap and send.

Stickers are generally larger than emoji and more detailed, but don’t fit inline with text as cleanly as tiny emoji.

3. Avatar-Based Emoji (Personal Cartoon Faces)

Some platforms offer personal avatar emoji:

• You take a selfie or design a character.
• The app generates a whole set of “you” emoji: laughing, crying, celebrating, etc.
• These can be sent as stickers, images, or reactions.

These tools usually walk you through:

1. Creating your avatar (face shape, hair, style)
2. Generating expressions automatically
3. Sharing them via keyboard, camera app, or integrated emoji panel

They’re easy to create but are often locked into one ecosystem and less customizable than hand-made emoji.

4. Custom Emoji Keyboards & Image-Based Emoji

On phones and tablets, you can:

• Install a third-party keyboard that offers custom emoji or stickers.
• Use a photo-to-sticker tool to turn your own images into tiny emoji-like graphics.
• Save them as frequently-used images that are one tap away.

Typical steps:

1. Create or crop an image to a small, square format.
2. Optionally remove the background for a cleaner look.
3. Save or import it into your custom keyboard or gallery.
4. Insert it from the keyboard into chats, social apps, or email.

This method gives broad app coverage (you use it anywhere you can use the keyboard) but depends heavily on your OS and app permissions.

Key Variables That Affect How You Create Emoji

How you actually go about making custom emoji depends on a few main factors.

1. Device and Operating System

Your device type and OS shape what’s possible:

Some platforms let custom emoji appear almost like system emoji; others treat them strictly as images or stickers.

2. The App or Platform You Use Most

Different apps have different rules:

• App supports true custom emoji (like Slack, Discord)
  • You upload images directly. Limited to that workspace or server.
• App supports stickers but not emoji
  • You make sticker packs instead of emoji.
• App doesn’t support either
  • You rely on a custom keyboard or copy-pasting small images.

If your main use is:

• Team chat → you’ll likely use workspace/server emoji.
• Group messaging with friends → stickers or avatar emoji.
• Social media posts → image-based emoji or custom keyboards.

3. Image Format, Size, and Quality

Even if an app claims to support “any image,” practical limits apply:

• File type: PNG with transparency is widely accepted; some prefer WebP.
• Dimensions: Often small (e.g., 32×32 to 128×128 pixels).
• File size: Each platform sets a maximum size in kilobytes or megabytes.
• Legibility: Highly detailed artwork will look muddy when shrunk.

Simple designs with bold outlines and limited colors usually work best as emoji.

4. Your Design Skills and Tools

Your comfort level with design tools changes your options:

• Beginner
  • Use emoji makers, avatar tools, or auto-background-removers.
• Intermediate
  • Adjust image size, crop, and add simple outlines or shadows.
• Advanced
  • Create vector art, pixel art, or hand-drawn emoji for ultra-clean results.

The more control you want over the look, the more you’ll rely on dedicated image-editing software.

5. Where You Want the Emoji To Work

Scope is crucial:

• Single app / workspace only
  • Office Slack, one Discord server, or a specific group chat.
• All your messaging apps on one device
  • Keyboard-based solutions and reusable image libraries.
• Shared across devices and friends
  • Platforms that sync across accounts or exportable sticker packs.

Your answer to “Where do I need this emoji to show up?” narrows the field.

Different User Profiles, Different Emoji Setups

People generally fall into a few patterns when they start making custom emoji.

Power Users in Team Tools

• Heavy Slack or Discord usage.
• Want fast inline reactions and memes.
• Usually:
  • Make tiny, high-contrast emoji.
  • Use the platform’s built-in custom emoji.
  • Accept that those emoji are tied to that workspace or server.

Casual Messengers With Friends and Family

• Live mostly in apps like WhatsApp, iMessage, Telegram, or basic SMS.
• Prefer fun, expressive stickers or avatar emoji.
• Often:
  • Use avatar-based emoji sets the platform offers.
  • Turn favorite photos into sticker packs.
  • Rely on built-in sticker makers rather than graphic editors.

Creators, Streamers, and Brand Owners

• Care about consistent style and brand identity.
• Want emoji that match logos, mascots, or personal aesthetics.
• Typically:
  • Design emoji in professional tools at high resolution.
  • Export platform-specific versions (different sizes/formats).
  • Consider where fans will use them: Discord servers, Twitch-style chats, or sticker packs.

Tinkerers and Customization Fans

• Enjoy tweaking every visual detail on their phone or computer.
• Want system-wide custom icons, emoji, and themes.
• Often:
  • Install custom keyboards and emoji apps.
  • Use small PNG/WebP icons saved in galleries or shortcuts.
  • Accept a bit more setup complexity in exchange for flexibility.

Each of these profiles will judge “best way to create custom emoji” very differently, even though the basic building blocks (small images, app support, keyboard access) stay the same.

Bringing It All Together: Your Setup Is the Missing Piece

Creating custom emoji always involves the same core steps: design a tiny, clear image, and then plug it into a system that can insert that image into your messages like an emoji.

What changes is:

• Which device and OS you’re on
• Which apps you actually use every day
• How polished you need the emoji to look
• Whether they should work in one place or across many

Those specifics decide whether you’re better off with built-in custom emoji, sticker packs, avatar generators, custom keyboards, or full-on graphic design workflows. Once you look closely at your own apps, devices, and comfort level with design tools, the “right” way to create custom emoji tends to become much clearer.