Audio Converter — MP3, WAV Free Conversion
Convert MP3, WAV, OGG, M4A and more. All processing happens in your browser — no file upload.
Supports MP3, WAV, OGG, M4A, AAC and other browser-decodable formats.
Drag & drop audio file or click to select
MP3 · WAV · OGG · M4A · AAC
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About Audio Converter
Audio Converter lets you convert audio files between popular formats — MP3, WAV, OGG, FLAC, and AAC — entirely in your browser. No uploads, no accounts, no waiting. Your audio files never leave your device.
How to Convert Audio
- 1Upload the audio file you want to convert.
- 2Select the target output format from the format list.
- 3Adjust the quality setting if needed (higher quality means larger file size).
- 4Click Convert and download the converted audio file.
Popular Use Cases
Convert WAV recordings to MP3
Shrink large WAV files from voice recorders or music software into compact MP3s for easy sharing and storage.
Make audio play everywhere
Convert OGG or M4A into MP3 or WAV so files play on any device, browser, or older media player.
Prepare audio for editing
Convert compressed files to lossless WAV before importing them into editing or production software.
Extract a clip from a track
Trim a song to just the part you need and export it as MP3 or WAV — great for ringtones or samples.
Why FileZoom
No upload — audio stays private
Conversion runs fully in your browser; voice memos and music never reach a server.
Free with no limits
Convert as many files as you want — no account, no watermark, no daily quota.
Trim and adjust volume
Cut to a specific segment and boost or lower the volume before exporting, all in one tool.
Lossless and compressed formats
Output lossless WAV for editing or compressed MP3 for sharing, with adjustable bitrate.
Formats & Features
| Input formats | MP3, WAV, OGG, M4A, AAC, and other browser-decodable audio. |
|---|---|
| Output formats | MP3, WAV, OGG, FLAC, and AAC. |
| MP3 bitrate | Adjustable — higher bitrate means better quality and a larger file (128 kbps is standard). |
| Editing | Trim to a time range and adjust volume before export. |
| File size | Files up to about 50 MB; longer audio takes more time on your device. |
| Processing | 100% in your browser with the Web Audio API and lamejs. No upload. |
How It Works
FileZoom decodes your audio with the browser's Web Audio API into raw PCM samples, applies any trim or volume changes, then re-encodes to your chosen format — using lamejs for MP3 — directly on your device. Because decoding and encoding both run in your browser, your audio is never uploaded and the original file stays untouched.
Tips & Best Practices
- Converting to MP3? 128 kbps is fine for speech; use 192–320 kbps for music you want to keep crisp.
- Choose WAV (lossless) when you'll edit the file further; choose MP3 when you want a small file to share.
- Need just a chorus or a ringtone? Set the trim start and end before converting to export only that segment.
- Audio too quiet? Raise the volume above 100% before exporting — no separate editor needed.
FAQ
Are my audio files uploaded to a server?
No. All conversion happens entirely in your browser using the Web Audio API and lamejs. Your files never leave your device.
Which audio formats are supported?
You can convert between MP3, WAV, OGG, FLAC, and AAC. Most common audio files are supported.
Will the audio quality change after conversion?
Quality depends on the format and settings you choose. Lossless formats like WAV and FLAC preserve full quality. Lossy formats like MP3 may reduce quality slightly.
Is there a file size limit?
Files up to 50MB can be converted. Very long audio files may take more time depending on your device.
How do I convert WAV to MP3?
Upload the WAV file, choose MP3 as the output format, pick a bitrate, and click Convert. Everything runs in your browser.
What bitrate should I choose for MP3?
128 kbps is standard quality and small; 192–320 kbps keeps music closer to the original. Higher bitrate means a larger file.
Can I convert and trim at the same time?
Yes. Set a start and end time in the Trim section, and only that segment is converted and exported.
Does the audio converter work on mobile?
Yes. It runs in mobile browsers such as Safari and Chrome, so you can convert audio on your phone or tablet.