What Are AI Character Cards (v2)? How to Import & Export Them
Learn what AI character cards (v2) are, their key fields, and how to import or export them in LLM Playground—no email or payment needed.
AI character cards let you create or interact with custom AI personalities—whether it’s a medieval queen, a coding assistant, or a fictional friend. The widely supported Character Card v2 format standardizes these personalities, making them easy to share, tweak, or use across platforms. If you’ve ever wanted to bring your favorite AI character into a new app or fine-tune its behavior, understanding v2 cards is the first step. LLM Playground supports this format natively, so you can import, export, or even create your own characters without restrictions—no email or payment required.
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Start chatting freeWhat Is an AI Character Card?
An AI character card is a small file that defines how an AI behaves in a conversation. Think of it as a blueprint for personality: it tells the AI who it is, how it should talk, and what scenarios it’s designed for. These cards are used in chatbots, roleplaying, and even professional tools like coding assistants or language tutors.
Character cards became popular because they let users customize interactions without coding. Instead of manually adjusting settings for every chat, you can load a pre-made card—or create your own—and instantly get a consistent experience. The v2 format, which LLM Playground uses, is one of the most widely adopted standards, meaning cards you make or download can work across many apps and services.
Character Card v2: Key Fields Explained
These fields work together to create a cohesive personality. For instance, Chef Mateo in LLM Playground uses a scenario about a bustling kitchen and example messages that include cooking tips, while Prof. Lin focuses on academic explanations and a formal tone. You can edit any of these fields to tweak how the character behaves—whether you want it to be funnier, more serious, or specialized for a specific task.
- Description: A brief overview of the character’s role or identity. Example: “A medieval scholar who loves ancient texts and speaks in riddles.”
- Personality: Traits that define how the character acts. Example: “Curious, patient, and slightly sarcastic.”
- Scenario: The context or situation the character is designed for. Example: “You’re in a fantasy tavern, and the scholar is explaining lore to travelers.”
- Example Messages: Snippets of dialogue showing how the character might respond. These help the AI mimic the intended style.
- Greetings: Opening lines the character uses when starting a conversation. Example: “Ah, another seeker of knowledge! What mysteries shall we unravel today?”
- System Prompt: Instructions that guide the AI’s behavior behind the scenes. This is often the most technical part, telling the AI how to prioritize its responses.
Why Use Character Cards?
Character cards solve a common problem in AI chat: consistency. Without a card, an AI’s responses can feel generic or shift unpredictably between conversations. Cards ensure the AI stays in character, whether you’re roleplaying, brainstorming, or using it for work. They’re also portable—you can share a card with friends, download one from a community, or use the same character across different apps.
For creators, cards are a way to distribute their work. LLM Playground’s public gallery includes characters like Ysolde, a fantasy guide, and Orin, a sci-fi companion. Each card is a self-contained file, so you can try them out or modify them to suit your needs. The built-in free model in LLM Playground means you can experiment with these characters without any cost or setup.
How to Import and Export Character Cards in LLM Playground
There’s no limit to how many cards you can import or export, and the process works the same whether you’re using the free built-in model or a connected provider. If you’re new to character cards, try starting with one of the public characters, like Thistle or Mara, and experiment with small edits to see how the fields affect the AI’s behavior.
- Importing a card: Upload a v2 file from your device or paste a card’s JSON directly into the app. The character will appear in your library, ready to use.
- Exporting a card: Save your custom character as a v2 file to share or back up. You can also export public characters from the gallery to tweak them locally.
- Editing cards: Adjust any field (like personality or scenario) to fine-tune the character. Changes are saved automatically, so you can test them right away.
Free Model vs. Connected Providers: What You Need to Know
The free model is ideal for testing character cards or casual use, while connected providers offer additional features like image generation. Your credentials are encrypted, and LLM Playground doesn’t mark up or resell access—you pay the provider directly. This flexibility means you can start for free and upgrade only if you need more capabilities.
| Feature | Free Built-in Model | Connected Provider (e.g., Airforce, Pollinations) |
|---|---|---|
| Cost | Unlimited messages, no payment needed | Billed by your provider at their rates |
| Speed | Two options: LLMPlayground Fast or standard | Depends on provider’s model |
| Image Generation | Not available | Available if your provider supports it |
| Character Cards | Fully supported | Fully supported |
Key facts
- Character Card v2 is a widely supported format for defining AI personalities, including fields like description, personality, and scenario.
- LLM Playground lets you import, export, and edit v2 cards for free—no email or payment required.
- Public characters like Chef Mateo and Prof. Lin are available to try or modify in the app’s gallery.
- The free built-in model supports unlimited chat with character cards; connected providers add features like image generation.
- Cards can be shared across platforms, making them ideal for roleplaying, work, or creative projects.
FAQ
Do I need an API key to use character cards in LLM Playground?
No. The free built-in model lets you use, create, and edit character cards without any API key or payment. If you want to use a connected provider for features like image generation, you’ll need to add your own key, but it’s optional.
Can I use character cards from other sites in LLM Playground?
Yes, as long as the card is in the v2 format. LLM Playground supports importing and exporting v2 cards, so you can bring characters from other platforms or share your own creations elsewhere.
What’s the difference between a character card and a system prompt?
A system prompt is one field within a character card. The card includes additional context like personality, scenario, and example messages, which help the AI stay in character more reliably than a system prompt alone.
How do I make my own character card?
Start with a template or edit an existing card. Define the character’s description, personality, scenario, and example messages, then save it as a v2 file. LLM Playground lets you test your card immediately with the free built-in model.
Are there any limits on how many character cards I can use?
No. You can import, export, and use as many character cards as you like in LLM Playground, with no restrictions on the free account.