Chub AI

backstory, and voice — and lets anyone browse, rate, download, and upload them. If [Character.AI](/platforms/character-ai/) is where people start and [Janitor AI](/platforms/janitor-ai/) is where many go next, Chub AI is the shared warehouse that feeds both ends of the funnel: it is where a large share of the cards used across every other platform actually originate. That position makes it less of a destination in its own right and more of an infrastructure layer for the hobby. People arrive from a chat platform looking for better or more specialized characters, fill up on cards, and carry them off to wherever they actually roleplay. The catalogue spans anime and game fan-characters, original creations across fantasy, modern, and dramatic genres, and a substantial uncensored section. Because it sits at the centre of the card economy, understanding Chub AI is really about understanding two things: how to find good cards, and how to get them where you want to use them. Chub AI has a dual identity that trips up newcomers. The first half is the repository — the searchable library of cards described above. The second half is Venus AI, Chub's own in-browser chat front-end, which lets you talk to a card directly on the site without installing anything. One brand, two functions: Chub is discovery, Venus is one way to use what you discover. This matters because it changes who Chub AI competes with. As a repository it has no real rival — nothing else hosts as many cards in the standard format. As a chat front-end, Venus competes with Janitor AI and, at the more technical end, [SillyTavern](/platforms/sillytavern/). The honest framing most experienced users land on: come to Chub for the cards, and decide separately where you want to chat. If your main need is finding characters, Chub plus Venus is excellent. If your main need is deep, private, highly customised roleplay, you will likely download from Chub and chat elsewhere. The two are complementary, not mutually exclusive, and the most common power-user setup uses Chub purely as the source feeding a local front-end.

Every card surfaces its rating, download count, tags, and creator, so you can size up quality before opening it. Pick something that looks well made and read its description page. To use a card outside the site, open its detail page and click Download — you get a Tavern V2/V3 PNG that imports directly into SillyTavern, Janitor AI, or Agnai. To use it on the spot, click the option to chat with Venus; the free model gets you started, and you can connect a stronger model later. If you want to contribute, the Upload button takes either a Tavern PNG or a manual form with the familiar fields — Name, Summary, Personality, Scenario, First Message, and Example Dialogue — plus tags that determine how discoverable your card is. The whole loop, from landing on the site to chatting with a downloaded character, takes about ten minutes and no technical setup.

A few reliable signals separate the good from the forgettable. On ratings, favour cards near 4.5 stars that also have a real number of votes behind them, rather than a perfect score from three people. On popularity, a download count in the thousands usually means the card holds up in actual play. On substance, the personality and scenario together should run to several hundred words, and there should be at least three example exchanges that show the character's specific voice rather than generic filler. Finally, a creator with several well-rated cards is a strong bet — quality tends to cluster. It helps to know the broad shape of the catalogue before you dive in. Fan-characters from popular anime and games are the largest and most uneven category — high volume, wildly variable quality. Original characters cluster into recognisable lanes: fantasy and adventure worlds built for long-form play, low-stakes modern slice-of-life setups, high-tension dramatic archetypes, and gentle companion-style cards. There is also a sizeable uncensored section gated behind a content toggle. Knowing which lane you want turns an overwhelming library into a manageable search. For discovery, tags are the main tool: combine a genre or franchise tag with a type tag to narrow a huge result set down to what you actually want, and sort by New to catch promising cards early. Following Featured Creators and the recommendation threads in communities like r/CharacterAIrunaways surfaces the people who reliably ship good work. If a downloaded card ever imports with garbled text or broken formatting elsewhere, that is almost always damaged PNG metadata or a non-standard older format; an online card editor can open and re-export it cleanly, which fixes the great majority of these cases.

The Tavern V2/V3 PNG format that Chub uses is the de facto standard, so cards import natively into SillyTavern (the reference front-end), Janitor AI (via Create then Import), and Agnai (an open multi-format front-end). They do not work with Character.AI, which is a closed ecosystem with no import path at all, and they will not load on platforms that use their own proprietary card schema rather than the Tavern standard. This is exactly why Chub occupies the middle of the migration funnel. Someone leaving a closed platform cannot bring their old characters with them, but they can come to Chub, find equivalents or better, and carry those cards into an open platform that respects the format. The practical workflow that has emerged among heavier users is a three-step pipeline: discover and download on Chub, run the character in SillyTavern for the best privacy and control, and supply the model through an API such as OpenRouter or DeepSeek. Each tool does the one thing it is best at, and the Tavern format is the glue that lets them hand off to each other.

The free hosted model is serviceable for a quick look but noticeably weaker than what a modern API delivers. In Venus, the path is Settings then AI then API Key, and it accepts the usual range: OpenAI-compatible providers (OpenAI, DeepSeek, Together AI and similar), OpenRouter as a unified gateway, Anthropic's Claude, and local back-ends such as KoboldAI for people running their own hardware. The value-oriented choice for most people is DeepSeek, which delivers strong roleplay for roughly a few dollars a month; for the richest narrative quality, Claude through OpenRouter is the step up, at a higher but still modest cost; and running a local model through KoboldAI is effectively free once you own the hardware. The setup mirrors what you would do on any Tavern-compatible front-end — paste a key, choose a model, save — so a key you already use for Janitor AI or SillyTavern works here too. Once configured, Venus becomes a genuinely capable chat surface rather than a basic demo, and it removes the need to install anything if a local front-end feels like too much.