Free Audio Converter
Convert audio files to MP3, WAV, M4A, FLAC or OGG locally in your browser. Choose an audio bitrate, preview and download your converted audio.
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How to convert WAV to MP3 in your browser
Convert an audio file into a format that your player or application accepts. This tool accepts audio files only; use the separate Video Converter for video tasks.
- Choose an audio file up to 200 MB, such as WAV, MP3, M4A, AAC, FLAC or OGG.
- Select MP3 as the output for a WAV-to-MP3 conversion, or choose another available audio format.
- Choose the audio bitrate when that format supports it, then select Convert audio.
- Wait for the result, listen to its preview when supported, and choose Download audio to save the file.
When an audio converter helps
Different apps want different audio formats. A podcast host may ask for MP3, a video editor may prefer WAV, and an Apple device handles M4A well. This converter changes one audio file into another format so it works where you need it.
Musicians use it to turn a large WAV mix into a smaller MP3 for sharing. Archivists convert recordings to FLAC to keep full quality in less space. Teachers and students shrink lecture recordings so they upload faster. The tool handles audio files up to 200 MB.
It also suits people who are cautious about where their files go. Because the work runs in the browser on your own device, a private interview or an unreleased track does not need to be sent anywhere to be converted. That makes it a practical choice for quick, one-off jobs.
A worked example
Say you have a 50 MB WAV voice memo and need a smaller file for email. Choose MP3 and a bitrate of 128 kbps. At 128 kbps, one minute of audio takes about 0.96 MB, so a five minute recording ends up near 4.8 MB, far smaller than the source.
If you need an exact archive instead, choose FLAC. FLAC is lossless, so there is no bitrate to pick and the decoded sound matches the source. Choosing WAV gives you 16-bit PCM, which is widely accepted by editing software but is the largest option.
The same math helps you pick a bitrate. At 320 kbps a minute takes about 2.4 MB, and at 96 kbps about 0.72 MB. Higher bitrates keep more detail but make larger files, so choose based on how the audio will be used.
How the conversion works
Output formats are MP3, WAV (16-bit PCM), M4A using AAC, FLAC, and OGG using Vorbis. For the lossy formats, MP3, M4A, and OGG, you can choose a bitrate from 96 to 320 kbps. WAV and FLAC have no bitrate setting. Lossy outputs are resampled to 44.1 kHz, the standard CD sample rate.
Conversion runs in your browser. The first time you use it, the browser downloads the conversion engine, about 31 MB, so the first run takes longer. After that, the work happens on your device and you can cancel a conversion at any time.
Only the first audio stream in a file is converted, and metadata such as title, artist, or cover art is stripped from the output. If tags matter, add them again in your music library or tag editor.
Common mistakes to avoid
Converting a lossy file to a lossless format does not bring back detail that was already removed. An MP3 saved as FLAC is bigger but sounds the same as the MP3. Start from the best source you have.
Avoid converting the same file from one lossy format to another again and again. Each pass can add small artifacts. Pick a bitrate once, keep your original, and convert from it when you need a new version. Also leave the tab open until the download is ready, especially on the first run while the engine loads.
Useful tips and limitations
- The local processing engine downloads from this site on first use. Keep the tab open while it prepares and converts.
- A higher bitrate can make a larger file; it does not recover detail that was already missing from the source.
- Some formats can be downloaded even when the browser cannot play their preview.
- For spoken word, 96 or 128 kbps is usually enough, while music benefits from 192 kbps or higher.
- Keep the original file until you have listened to the converted version all the way through.
Common questions
Can I upload a video to the Audio Converter?
No. This page accepts audio files only. Video processing is provided in separate tools.
Where is the audio download button?
Download audio is beside the conversion controls and in the completed result panel. It becomes available when processing finishes.
Does converting MP3 to WAV restore lost quality?
No. A larger uncompressed file cannot restore detail removed from a previously compressed recording.
Why is the first conversion slower?
The browser downloads the roughly 31 MB conversion engine on first use, and later conversions reuse it.
Will song titles and artist tags be kept?
No. Metadata is stripped from the output file, so you need to add tags again afterward.
What sample rate do MP3, M4A, and OGG files use?
Lossy outputs are resampled to 44.1 kHz.
Your files are processed in this browser. They are not uploaded to ToolWorld Online. Save the finished download before closing the page.