MP3 to WAV Converter

MP3 to WAV Converter is a free online tool that helps you clean up, change or check your text. Use it right on this page, with no sign-up and nothing to install.

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<iframe srcdoc="&lt;!DOCTYPE html&gt;<br /> &lt;html lang=&quot;en&quot;&gt;<br /> &lt;head&gt;<br /> &lt;meta charset=&quot;UTF-8&quot;&gt;<br /> &lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1.0&quot;&gt;<br /> &lt;title&gt;MP3 to WAV Converter&lt;/title&gt;<br /> &lt;script src=&quot;https://cdn.jsdelivr.net/npm/file-saver@2.0.5/dist/FileSaver.min.js&quot;&gt;&lt;/script&gt;<br /> &lt;/head&gt;<br /> &lt;body&gt;<br /> &lt;h1&gt;MP3 to WAV Converter&lt;/h1&gt;</p> <p> &lt;!-- Input for MP3 file --&gt;<br /> &lt;input id=&quot;mp3ToWavInput&quot; type=&quot;file&quot; accept=&quot;audio/mp3&quot;&gt;<br /> &lt;button onclick=&quot;convertMP3ToWAV()&quot;&gt;Convert to WAV&lt;/button&gt;</p> <p> &lt;p id=&quot;mp3ToWavProgress&quot;&gt;Progress: 0%&lt;/p&gt;</p> <p> &lt;!-- Download Button --&gt;<br /> &lt;a id=&quot;downloadMp3Wav&quot; style=&quot;display:none;&quot;&gt;<br /> &lt;button onclick=&quot;downloadWAV()&quot;&gt;Download WAV&lt;/button&gt;<br /> &lt;/a&gt;</p> <p> &lt;script&gt;<br /> // Function to convert MP3 to WAV<br /> function convertMP3ToWAV() {<br /> const fileInput = document.getElementById('mp3ToWavInput');<br /> const progressText = document.getElementById('mp3ToWavProgress');<br /> const downloadBtn = document.getElementById('downloadMp3Wav');</p> <p> if (fileInput.files.length === 0) return alert(&quot;Please select an MP3 file.&quot;);</p> <p> const file = fileInput.files[0];<br /> const reader = new FileReader();</p> <p> reader.onload = function(e) {<br /> const audioContext = new (window.AudioContext || window.webkitAudioContext)();<br /> audioContext.decodeAudioData(e.target.result, function(buffer) {<br /> // Create WAV buffer from decoded MP3<br /> const wavBuffer = bufferToWav(buffer);</p> <p> // Create Blob from the WAV buffer<br /> const blob = new Blob([wavBuffer], { type: 'audio/wav' });<br /> const url = URL.createObjectURL(blob);</p> <p> // Show download button<br /> downloadBtn.style.display = 'inline-block';<br /> downloadBtn.href = url;<br /> progressText.innerHTML = 'Progress: 100%';<br /> }, function(error) {<br /> console.error('Error decoding audio data:', error);<br /> alert('Error converting MP3 to WAV');<br /> });</p> <p> // Update progress while file is being processed<br /> progressText.innerHTML = 'Progress: In Progress...';<br /> };<br /> reader.readAsArrayBuffer(file);<br /> }</p> <p> // Function to convert AudioBuffer to WAV<br /> function bufferToWav(buffer) {<br /> const numOfChannels = buffer.numberOfChannels;<br /> const sampleRate = buffer.sampleRate;<br /> const samples = buffer.length;</p> <p> // Create a data view for WAV format<br /> const wavHeader = new ArrayBuffer(44);<br /> const headerView = new DataView(wavHeader);</p> <p> // Setting up WAV header<br /> writeWavHeader(headerView, samples, numOfChannels, sampleRate);</p> <p> // Converting audio data to WAV format (16 bit PCM, interleaved)<br /> const pcmData = new Int16Array(samples * numOfChannels);<br /> for (let c = 0; c &lt; numOfChannels; c++) {<br /> const channelData = buffer.getChannelData(c);<br /> for (let i = 0; i &lt; samples; i++) {<br /> const s = Math.max(-1, Math.min(1, channelData[i]));<br /> pcmData[i * numOfChannels + c] = s &lt; 0 ? s * 32768 : s * 32767;<br /> }<br /> }</p> <p> // Combine WAV header and audio data<br /> const wavData = new Uint8Array(wavHeader.byteLength + pcmData.byteLength);<br /> wavData.set(new Uint8Array(wavHeader), 0);<br /> wavData.set(new Uint8Array(pcmData.buffer), wavHeader.byteLength);</p> <p> return wavData;<br /> }</p> <p> // Write WAV header to DataView<br /> function writeWavHeader(view, samples, channels, sampleRate) {<br /> // WAV file header (RIFF, fmt, data)<br /> view.setUint32(0, 0x52494646, false); // &quot;RIFF&quot;<br /> view.setUint32(4, 36 + samples * channels * 2, true); // File size<br /> view.setUint32(8, 0x57415645, false); // &quot;WAVE&quot;<br /> view.setUint32(12, 0x666d7420, false); // &quot;fmt &quot;<br /> view.setUint32(16, 16, true); // PCM header length<br /> view.setUint16(20, 1, true); // PCM format<br /> view.setUint16(22, channels, true); // Number of channels<br /> view.setUint32(24, sampleRate, true); // Sample rate<br /> view.setUint32(28, sampleRate * channels * 2, true); // Byte rate<br /> view.setUint16(32, channels * 2, true); // Block align<br /> view.setUint16(34, 16, true); // Bits per sample<br /> view.setUint32(36, 0x64617461, false); // &quot;data&quot;<br /> view.setUint32(40, samples * channels * 2, true); // Data size<br /> }</p> <p> // Function to download WAV file using FileSaver.js<br /> function downloadWAV() {<br /> const downloadBtn = document.getElementById('downloadMp3Wav');<br /> const wavFile = downloadBtn.href;<br /> saveAs(wavFile, 'converted_audio.wav');<br /> }<br /> &lt;/script&gt;<br /> &lt;style&gt;html,body{height:auto!important;min-height:0!important;max-height:none!important}&lt;/style&gt;&lt;script&gt;(function(){function wpcPost(){try{parent.postMessage({wpcId:27,wpcH:document.body.scrollHeight},'*');}catch(e){}}window.addEventListener('load',wpcPost);try{new MutationObserver(wpcPost).observe(document.body,{childList:true,subtree:true,attributes:true});}catch(e){}window.addEventListener('resize',wpcPost);setInterval(wpcPost,600);})();&lt;/script&gt;&lt;/body&gt;<br /> &lt;/html&gt;<br /> " id="wpc-frame-27" class="wpc-embed-frame" style="width:100%;border:0;display:block;overflow:hidden;" scrolling="no"></iframe><br /> <p><a href="https://ilmhunt.com/mp3-to-wav-converter/" target="_blank" rel="noopener">MP3 to WAV Converter</a> by <a href="https://ilmhunt.com/" target="_blank" rel="noopener">IlmHunt</a> — free online tools</p>