100 Free AI UI Components

Chat Sidebar

A sidebar with past chats grouped by date, a New chat button and the current chat highlighted. On phones it slides in from a menu button.

Download the fileOpen full screen

One HTML file with the CSS and JavaScript inside. No library needed. MIT license.

Live preview

How to use it

  1. Click Copy the code, or download the file.
  2. Paste the CSS into your stylesheet, the HTML where you want the component, and the script before the closing body tag.
  3. Change --accent at the top of the CSS to your brand color, then connect the events to your AI service.

What you get

  • Works in light and dark mode automatically
  • Keyboard friendly, with labels for screen readers
  • Fits phones, tablets and desktops
  • Respects the reduced motion setting
  • No framework, so it works with any stack

The code

<!DOCTYPE html>
<!--
  Chat Sidebar: a free AI UI component
  From 100 Free AI UI Components by MM Rahman Bappi, MIT license
  https://mmrahmanbappi.github.io/100-free-ai-ui-components/

  How to use: copy the CSS, HTML and JavaScript below into your page.
  Colors are CSS variables at the top. Change --accent to match your brand.
  Light and dark themes follow the visitor's system setting, or set
  data-theme="dark" or data-theme="light" on the html element.
-->
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Chat Sidebar | Free AI UI Component</title>
<meta name="description" content="A sidebar with past chats grouped by date, a New chat button and the current chat highlighted. On phones it slides in from a menu button.">
<meta name="robots" content="noindex, follow">
<style>
:root{
  --accent:#5b5bd6; --accent-ink:#fff; --accent-soft:#ececfc;
  --bg:#f7f7f8; --surface:#fff; --surface-2:#f1f1f4; --ink:#17171c; --text:#3a3a44; --muted:#6c6c78;
  --line:#e3e3e8; --good:#15803d; --warn:#b45309; --bad:#c62828;
  --radius:14px; --shadow:0 1px 2px rgba(20,20,30,.06),0 8px 24px -12px rgba(20,20,30,.18);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,Ubuntu,sans-serif; --mono:ui-monospace,"Cascadia Code",Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --accent:#8b8bff; --accent-ink:#0f0f16; --accent-soft:#25254a;
  --bg:#0f0f13; --surface:#18181f; --surface-2:#212129; --ink:#f3f3f6; --text:#d4d4dc; --muted:#9a9aa8;
  --line:#2c2c36; --good:#4ade80; --warn:#fbbf24; --bad:#f87171; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -12px rgba(0,0,0,.6);
}}
:root[data-theme=dark]{
  --accent:#8b8bff; --accent-ink:#0f0f16; --accent-soft:#25254a;
  --bg:#0f0f13; --surface:#18181f; --surface-2:#212129; --ink:#f3f3f6; --text:#d4d4dc; --muted:#9a9aa8;
  --line:#2c2c36; --good:#4ade80; --warn:#fbbf24; --bad:#f87171; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -12px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html,body{margin:0}
body{min-height:100vh;display:grid;grid-template-columns:minmax(0,1fr);place-items:center;padding:24px;background:var(--bg);color:var(--text);font:15px/1.5 var(--font);-webkit-font-smoothing:antialiased}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
[hidden]{display:none!important}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition:none!important}}
/* ---- component ---- */
.msgs{flex:1;overflow-y:auto;padding:16px;display:flex;flex-direction:column;gap:12px;scroll-behavior:smooth}
.m{max-width:80%;padding:9px 13px;border-radius:14px;line-height:1.55;font-size:14px;overflow-wrap:anywhere;animation:pop .2s ease}
.m.u{align-self:flex-end;background:var(--accent);color:var(--accent-ink);border-bottom-right-radius:4px}
.m.a{align-self:flex-start;background:var(--surface-2);color:var(--text);border-bottom-left-radius:4px}
@keyframes pop{from{opacity:0;transform:translateY(5px)}}
.pb{display:flex;gap:8px;align-items:flex-end;padding:10px;border-top:1px solid var(--line);background:var(--surface)}
.pb textarea{flex:1;border:1px solid var(--line);border-radius:12px;padding:9px 12px;resize:none;background:var(--surface);color:var(--ink);max-height:120px;line-height:1.45;min-width:0}
.pb textarea:focus{outline:0;border-color:var(--accent)}
.send{width:38px;height:38px;border-radius:11px;border:0;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;cursor:pointer;flex:none}
.send:disabled{opacity:.35;cursor:not-allowed}
.ib{width:34px;height:34px;display:grid;place-items:center;border:0;background:none;color:var(--muted);border-radius:9px;cursor:pointer;flex:none}
.ib:hover{background:var(--surface-2);color:var(--ink)}
body{padding:0;place-items:stretch}
.app{display:grid;grid-template-columns:260px 1fr;height:100vh;width:100%}
.side{background:var(--surface-2);border-right:1px solid var(--line);display:flex;flex-direction:column;min-height:0}
.side .top{padding:12px}
.new{width:100%;display:flex;align-items:center;gap:8px;justify-content:center;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;padding:9px;font-weight:600;cursor:pointer}
.new:hover{border-color:var(--accent)}
nav{overflow-y:auto;padding:0 8px 12px}
nav h2{font-size:11.5px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin:14px 8px 6px}
nav a{display:block;padding:8px 10px;border-radius:9px;color:var(--text);text-decoration:none;font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
nav a:hover{background:var(--surface)}nav a[aria-current=page]{background:var(--surface);color:var(--ink);font-weight:600;box-shadow:0 1px 2px rgba(0,0,0,.08)}
.main{display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--surface)}
.bar{display:flex;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid var(--line)}
.bar h1{font-size:15px;margin:0;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.burger{display:none}.scrim{display:none}
@media(max-width:700px){.app{grid-template-columns:1fr}.burger{display:grid}
  .side{position:fixed;inset:0 auto 0 0;width:min(280px,85vw);z-index:5;transform:translateX(-100%);transition:transform .2s}
  .app.open .side{transform:none}.app.open .scrim{display:block;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:4}}
</style>
</head>
<body>
<div class="app" id="app">
  <aside class="side" id="side" aria-label="Chats"><div class="top"><button class="new" type="button" id="new"><svg viewBox="0 0 24 24" width="16" height="16" fill="none" stroke="currentColor" stroke-width="2.2" stroke-linecap="round" aria-hidden="true"><path d="M12 5v14M5 12h14"/></svg>New chat</button></div>
    <nav id="nav"></nav></aside>
  <div class="scrim" id="scrim"></div>
  <main class="main" id="w"><div class="bar"><button class="ib burger" id="bg" type="button" aria-label="Open chat list" aria-expanded="false" aria-controls="side"><svg viewBox="0 0 24 24" width="18" height="18" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" aria-hidden="true"><path d="M4 7h16M4 12h16M4 17h16"/></svg></button><h1 id="title"></h1></div>
    <div class="msgs" id="msgs" role="log" aria-live="polite" aria-label="Messages"></div>
<form class="pb" id="pf"><label class="sr" for="pq">Message</label><textarea id="pq" rows="1" placeholder="Message the assistant"></textarea><button class="send" id="ps" type="submit" aria-label="Send message" disabled><svg viewBox="0 0 24 24" width="18" height="18" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M12 19V5M5 12l7-7 7 7"/></svg></button></form></main>
</div>
<script>
// Demo helper: add ?theme=dark or ?theme=light to the address to preview a theme.
(function(){var t=new URLSearchParams(location.search).get('theme');if(t)document.documentElement.dataset.theme=t;})();
var REPLIES=['Good question. Here is a short answer you can use right away.','Sure. I would start with the simplest option and adjust from there.','Here is a quick plan: first list what you need, then pick one small step for today.'];
function chat(root,seed){var msgs=root.querySelector('#msgs'),f=root.querySelector('#pf'),q=root.querySelector('#pq'),s=root.querySelector('#ps'),busy=false,n=0;
  function add(role,text){var d=document.createElement('div');d.className='m '+role;d.textContent=text;msgs.appendChild(d);msgs.scrollTop=msgs.scrollHeight;return d;}
  function grow(){q.style.height='auto';q.style.height=Math.min(q.scrollHeight,120)+'px';}
  (seed||[]).forEach(function(p){add(p[0],p[1]);});
  q.addEventListener('input',function(){grow();s.disabled=!q.value.trim()||busy;});
  q.addEventListener('keydown',function(e){if(e.key==='Enter'&&!e.shiftKey&&!e.isComposing){e.preventDefault();f.requestSubmit();}});
  f.addEventListener('submit',function(e){e.preventDefault();var t=q.value.trim();if(!t||busy)return;add('u',t);q.value='';grow();s.disabled=true;busy=true;
    var d=add('a',''),words=REPLIES[n++%REPLIES.length].split(' '),i=0;
    (function tick(){if(i<words.length){d.textContent+=(i?' ':'')+words[i++];msgs.scrollTop=msgs.scrollHeight;setTimeout(tick,60);}else{busy=false;s.disabled=!q.value.trim();}})();});
  return {add:add};}
var GROUPS=[['Today',['Party planning','Email to my landlord']],['Yesterday',['Explain compound interest','Fix my CSS grid']],['Previous 7 days',['Trip to Lisbon','Birthday gift ideas','Weekly meal plan','Resume feedback']]];
var nav=document.getElementById('nav'),title=document.getElementById('title'),app=document.getElementById('app'),bg=document.getElementById('bg'),c=chat(document.getElementById('w'),[["u", "Can you help me plan a small birthday party?"], ["a", "Of course. How many guests, and is it indoors or outdoors?"], ["u", "About 12 people, in my apartment."], ["a", "Nice. Plan finger food, one simple game and a playlist. Want a shopping list?"]]);
function menu(v){app.classList.toggle('open',v);bg.setAttribute('aria-expanded',v);}
function select(a){nav.querySelectorAll('a').forEach(function(x){x.removeAttribute('aria-current');});a.setAttribute('aria-current','page');title.textContent=a.textContent;menu(false);}
GROUPS.forEach(function(g){var h=document.createElement('h2');h.textContent=g[0];nav.appendChild(h);g[1].forEach(function(t){var a=document.createElement('a');a.href='#';a.textContent=t;
  a.addEventListener('click',function(e){e.preventDefault();select(a);});nav.appendChild(a);});});
select(nav.querySelector('a'));
bg.addEventListener('click',function(){menu(!app.classList.contains('open'));});
document.getElementById('scrim').addEventListener('click',function(){menu(false);});
document.addEventListener('keydown',function(e){if(e.key==='Escape')menu(false);});
document.getElementById('new').addEventListener('click',function(){var a=document.createElement('a');a.href='#';a.textContent='New chat';a.addEventListener('click',function(e){e.preventDefault();select(a);});
  nav.insertBefore(a,nav.children[1]);select(a);document.getElementById('msgs').innerHTML='';document.getElementById('pq').focus();});
</script>
</body>
</html>

More chat layouts components

  • Full Chat Window

    A complete chat screen with a header, scrolling messages and a prompt box at the bottom. Replies stream in, and the view follows along.

  • Empty Chat Welcome Screen

    The first screen of a new chat: a greeting, example prompts, what the assistant can do and its limits, with the prompt box ready below.

  • Floating Chat Widget

    A round chat button in the corner that opens a small chat panel, with an unread badge. Escape or the close button hides it again.

  • Split View: Chat and Document

    Chat on one side and a live document on the other, the layout used by AI writing tools. On phones it switches to two tabs.

  • Mobile Chat Screen

    A phone-sized chat with a back button, assistant name and status, messages, and a prompt bar with an attach button, sized for thumbs.

  • Conversation Search

    Search through past chats as you type. Matching words are highlighted, and a friendly message appears when nothing is found.