Moon Chat sectionsChat UI template in HTML and CSS

Chat UI template in HTML and CSS

Chat UI template for products where people or models hold a conversation. A chatbox UI that reads clearly is what makes a thread followable at a glance. For developers and designers vibe coding AI and messaging products in Claude Code, Replit, Lovable, ChatGPT Codex, Bolt, or Cursor.

Chat Cards SaaS0 copies

About this vibe coding template

Chat UI template for developers and designers building anything with a conversation in it. It is now one of the most common screens in software: support tools, team messaging, and nearly every AI product answers in a thread. What makes one readable is small and easy to get wrong, and it is mostly about telling the two sides apart instantly and giving a long thread enough rhythm that someone can scan back through it. Plain HTML and CSS, no libraries and no build step.

Build a full AI chat product or AI SaaS app with this template design

An AI chat product repeats one surface at different sizes, from a full chat interface to a chat widget and a copilot panel, so one AI chat template can set the standard for every screen after it. Copy the template, paste it into Claude Code, Replit, Lovable, ChatGPT Codex, Bolt, or Cursor, and send this alongside it.

Plain HTML and CSS with no framework and no build step. To use it in React, Next.js, or Tailwind, paste it in and ask your AI coding tool to convert.

Paste into Claude Code, Replit, Lovable, Bolt, or Cursor

Common questions about this template

What is a chat UI?

The threaded view where a conversation happens, with the two sides visually distinct and a field to reply. AI products, support tools, and messaging apps all use one.

What makes a chat thread readable?

Telling the sides apart without reading them, keeping line length short enough to follow, and timestamps that appear where the conversation pauses, not on every line.

Does this work for an AI product?

Yes. An AI conversation is the same shape as a human one, with the model on one side. Pair it with a thinking indicator so a long answer does not look like a stall.

Which tools work with this chat template?

Claude Code, Replit, Lovable, ChatGPT Codex, Bolt, and Cursor. Paste it in and describe who is talking.