100 Free AI UI Components

Voice Recorder with Waveform

Record a voice message with live bars that follow your voice. Uses the real microphone when allowed, and explains clearly when it is not.

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>
<!--
  Voice Recorder with Waveform: 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>Voice Recorder with Waveform | Free AI UI Component</title>
<meta name="description" content="Record a voice message with live bars that follow your voice. Uses the real microphone when allowed, and explains clearly when it is not.">
<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 ---- */
.wrap{width:min(100%,560px);display:flex;flex-direction:column;gap:14px}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px 20px}
.card h2{font-size:15.5px;margin:0 0 4px;color:var(--ink)}
.muted{color:var(--muted);font-size:13px}
.num{font-variant-numeric:tabular-nums}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;padding:8px 14px;font-size:14px;font-weight:600;cursor:pointer}
.btn:hover{border-color:var(--accent)}.btn.pri{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.sm{padding:5px 10px;font-size:13px;border-radius:8px}
.note{font-size:13px;padding:9px 12px;border-radius:10px;background:var(--surface-2);color:var(--text)}
.note.warn{background:color-mix(in srgb,var(--warn) 10%,var(--surface));border:1px solid color-mix(in srgb,var(--warn) 35%,var(--line))}
.rec{display:flex;align-items:center;gap:14px;margin-top:14px}
.mic{width:56px;height:56px;border-radius:50%;border:0;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;cursor:pointer;flex:none;position:relative}
.mic.on{background:#dc2626;color:#fff}
.mic.on::after{content:"";position:absolute;inset:-5px;border-radius:50%;border:2px solid #dc2626;animation:ring 1.3s ease-out infinite}
@keyframes ring{from{opacity:.8;transform:scale(1)}to{opacity:0;transform:scale(1.3)}}
.wave{flex:1;display:flex;align-items:center;gap:3px;height:48px;min-width:0;overflow:hidden}
.wave i{flex:1;min-width:2px;max-width:5px;height:4px;border-radius:3px;background:var(--line);transition:height .08s}
.wave.live i{background:var(--accent)}
.time{font-size:15px;font-weight:700;color:var(--ink);min-width:44px;text-align:right}
.clips{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-direction:column;gap:6px}
.clips li{display:flex;align-items:center;gap:10px;background:var(--surface-2);border-radius:10px;padding:8px 12px;font-size:14px;color:var(--ink)}
.clips audio{height:32px;flex:1;min-width:0}
</style>
</head>
<body>
<div class="wrap"><div class="card">
  <h2>Voice message</h2><p class="muted" style="margin:0">Press the button, speak, then press again to stop.</p>
  <div class="rec"><button class="mic" id="mic" type="button" aria-pressed="false" aria-label="Start recording"><svg viewBox="0 0 24 24" width="22" height="22" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><rect x="9" y="3" width="6" height="11" rx="3"/><path d="M5 11a7 7 0 0014 0M12 18v3"/></svg></button>
    <div class="wave" id="wave" aria-hidden="true"></div><span class="time num" id="t" role="timer">0:00</span></div>
  <p class="note" id="note" role="status" aria-live="polite" hidden></p>
  <ul class="clips" id="clips" aria-label="Recordings"></ul>
</div></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 mic=document.getElementById('mic'),wave=document.getElementById('wave'),t=document.getElementById('t'),note=document.getElementById('note'),clips=document.getElementById('clips');
var N=40,bars=[],stream=null,rec=null,chunks=[],ctx=null,an=null,raf=null,start=0,timer=null,demo=false;
for(var i=0;i<N;i++){var b=document.createElement('i');wave.appendChild(b);bars.push(b);}
function say(m,warn){note.hidden=false;note.textContent=m;note.className='note'+(warn?' warn':'');}
function fmt(ms){var s=Math.floor(ms/1000);return Math.floor(s/60)+':'+String(s%60).padStart(2,'0');}
function draw(){var data=null;if(an){data=new Uint8Array(an.frequencyBinCount);an.getByteFrequencyData(data);}
  bars.forEach(function(b,i){var v=data?data[Math.floor(i*data.length/N/2)]/255:(0.2+0.6*Math.abs(Math.sin(Date.now()/180+i*.7))*Math.random());b.style.height=Math.max(4,v*46)+'px';});raf=requestAnimationFrame(draw);}
function setOn(v){mic.classList.toggle('on',v);wave.classList.toggle('live',v);mic.setAttribute('aria-pressed',v);mic.setAttribute('aria-label',v?'Stop recording':'Start recording');
  if(v){start=Date.now();timer=setInterval(function(){t.textContent=fmt(Date.now()-start);},250);draw();}else{clearInterval(timer);cancelAnimationFrame(raf);bars.forEach(function(b){b.style.height='4px';});}}
function addClip(url,ms){var li=document.createElement('li');li.innerHTML='<span class="num"></span>';li.firstChild.textContent=fmt(ms);
  if(url){var a=document.createElement('audio');a.controls=true;a.src=url;li.appendChild(a);}else{var s=document.createElement('span');s.className='muted';s.textContent='Demo clip (no microphone)';li.appendChild(s);}clips.prepend(li);}
async function begin(){note.hidden=true;
  if(!navigator.mediaDevices||!navigator.mediaDevices.getUserMedia||!window.MediaRecorder){demo=true;say('This browser cannot record audio, so this is a demo of the recording screen.',true);setOn(true);return;}
  try{stream=await navigator.mediaDevices.getUserMedia({audio:true});}
  catch(e){demo=true;say(e.name==='NotAllowedError'?'Microphone access was blocked. Allow it in your browser settings to record. Showing a demo instead.':'No microphone was found. Showing a demo of the recording screen.',true);setOn(true);return;}
  demo=false;ctx=new (window.AudioContext||window.webkitAudioContext)();an=ctx.createAnalyser();an.fftSize=256;ctx.createMediaStreamSource(stream).connect(an);
  chunks=[];rec=new MediaRecorder(stream);rec.ondataavailable=function(e){chunks.push(e.data);};
  rec.onstop=function(){addClip(URL.createObjectURL(new Blob(chunks,{type:rec.mimeType})),Date.now()-start);stream.getTracks().forEach(function(tr){tr.stop();});ctx.close();an=null;};rec.start();setOn(true);}
function end(){var ms=Date.now()-start;setOn(false);if(demo){addClip(null,ms);}else if(rec){rec.stop();}t.textContent='0:00';}
mic.addEventListener('click',function(){if(mic.classList.contains('on'))end();else begin();});
</script>
</body>
</html>

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