Audio Converter Online - Free
Change your audio file to a different format. The converter decodes your input using the browser audio engine, then re-encodes it in your chosen output format. No file is uploaded to any server - the entire conversion runs locally on your device. No ads, no bundled software, no fake download buttons.
Change your audio file to a different format. The converter decodes your input using the browser audio engine, then re-encodes it in your chosen output format. No file is uploaded to any server - the entire conversion runs locally on your device. No ads, no bundled software, no fake download buttons.
Problems This Tool Solves
Free audio converters keep giving me malware or aggressive ads
This converter runs entirely in your browser. No downloads, no bundled software, no ads, no fake buttons. Your file never leaves your device.
My converted file sounds worse than the original
Converting lossy to lossy (MP3 to AAC) adds a second layer of artifacts. Always convert from the highest-quality source. Lossy to lossless does not restore lost quality.
FLAC files will not play on my iPhone
Apple devices do not natively support FLAC in all contexts. Convert to ALAC (Apple Lossless) or MP3 at 256–320 kbps for full compatibility.
Common Use Cases
FLAC to MP3 for your phone
FLAC files are too large for phone storage. Convert to MP3 at 256–320 kbps for a good balance of quality and size.
WAV for editing, MP3 for sharing
Edit in WAV to avoid quality loss, then convert to MP3 for email, upload, or sharing.
Make a podcast upload-ready
Most podcast hosts accept MP3 at 128 kbps mono. Convert your WAV or FLAC recording to MP3 at the right bitrate.
Fix a file that will not play
Some devices or apps do not support OGG, FLAC, or WebM. Convert to MP3, which plays everywhere.
How to Convert Audio Online
- Upload your audio file in any format. MP3, WAV, OGG, FLAC, AAC, M4A, and WebM are all accepted.
- Choose the output format: WAV for full quality, MP3 for compatibility, or WebM/Opus for web use.
- Set quality options - bitrate for MP3, bit depth for WAV.
- Click Export. The conversion runs in your browser and the file downloads directly.
When to Convert vs When to Edit
Convert
Changes the file format without altering the audio content. The sound stays the same (within the limits of the target format).
Best for: compatibility, file size reduction, format switching, deliveryEdit (Trim, EQ, etc.)
Modifies the actual audio - cuts sections, changes tone, adjusts volume.
Best for: removing parts, fixing audio problems, adding effectsFormat Recommendations by Use Case
| Use case | Format | Settings |
|---|---|---|
| Maximum quality / archival | WAV 32-bit | No compression. Largest file size. |
| CD quality / editing | WAV 16-bit | Standard CD quality. Good for editing pipelines. |
| Podcast upload | MP3 128 kbps | Industry standard for speech podcasts. |
| Music sharing / general use | MP3 256–320 kbps | Good quality with wide compatibility. |
| Web audio / streaming | WebM/Opus | Best quality-per-bit for modern browsers. |
| DJ preparation | MP3 320 kbps | The DJ standard. Accepted by all DJ software. |
Quick Tips
- Always convert from the highest-quality source. Converting a 128 kbps MP3 to WAV does not restore lost quality.
- Avoid converting lossy to lossy (MP3 to MP3 at a different bitrate, or MP3 to AAC). Each conversion adds compression artifacts.
- Use 320 kbps if you are not sure which MP3 bitrate to pick. It is the maximum and sounds nearly indistinguishable from lossless.
- WAV 16-bit with TPDF dithering is professional-grade quality for any delivery purpose.
Common Misconceptions
Myth: Converting MP3 to WAV restores lost quality
Reality: The WAV file is larger but the audio is identical to the MP3. Frequencies removed by MP3 compression cannot be recovered.
Myth: 320 kbps MP3 is identical to CD quality
Reality: Very close, but not identical. At 320 kbps most listeners cannot tell the difference. For true CD quality, use WAV 16-bit or FLAC.
Myth: Higher sample rate always means better quality
Reality: Only if the source was recorded at that rate. Upsampling a 44.1 kHz file to 96 kHz adds file size but no new audio information.
Myth: Free audio converters are safe to download
Reality: Many free desktop converters bundle adware, toolbars, or outright malware. A browser-based converter like this one has no installer, no bundled software, and no file upload. Your audio stays on your device.
Common Problems and Fixes
Converted file sounds worse than the original
Converting from a lossy format (MP3) to another lossy format adds a second layer of compression artifacts. For best results, always convert from a lossless source (WAV, FLAC).
Output file is bigger than the original
Converting a small MP3 to WAV produces a much larger file because WAV is uncompressed. This is normal. The audio data is the same - the container is just larger.
File will not play on my device after converting
Some older devices do not support WebM/Opus. Convert to MP3 for maximum compatibility. MP3 plays on virtually every device and app.
Why Use This Audio Converter Online
- Input: MP3, WAV, OGG, FLAC, AAC, M4A, WebM, plus video files
- Output: WAV (16/24/32-bit), MP3 (128–320 kbps), or WebM/Opus
- TPDF dithering for professional-grade bit-depth conversion
- MP3 encoding runs in a Web Worker so the UI stays responsive
- No upload to any server. Everything runs in your browser.
Frequently Asked Questions
Can I convert FLAC to MP3 without losing quality?
MP3 is a lossy format, so some quality is always lost compared to FLAC. But at 256–320 kbps, the difference is inaudible to most listeners. Convert at the highest bitrate you can afford in file size.
What is the best format for sharing audio?
MP3 at 256–320 kbps. It plays on every device, every app, every platform. Nothing else comes close in compatibility.
What is TPDF dithering?
When reducing bit depth (like 32-bit to 16-bit), dithering adds a tiny amount of noise to reduce quantization distortion. TPDF is the standard professional dithering method. It makes the conversion sound smoother.
Can I convert video files to audio?
Yes. Drop a video file (MP4, WebM, MOV) into the editor and the audio track is extracted automatically. Then export in any audio format.
Is this converter safe to use?
Yes. The converter runs entirely in your browser. No file is uploaded to any server. There are no ads, no bundled software, and no fake download buttons. Your audio never leaves your device.
Does converting MP3 to WAV restore the lost quality?
No. The WAV file will be larger, but the audio data is identical to what was in the MP3. Frequencies removed by MP3 compression cannot be recovered. Always convert from the highest-quality source you have.
What is the difference between VBR and CBR?
CBR (constant bitrate) uses the same bitrate throughout the file. VBR (variable bitrate) uses more bits for complex passages and fewer for simple ones, producing better quality at the same average file size. VBR is generally recommended for music.
Is AAC better than MP3 at the same bitrate?
Yes. AAC is a newer codec that produces better quality than MP3 at the same bitrate. At 128 kbps, AAC sounds noticeably cleaner. At 256+ kbps the gap narrows. The quality ranking per bitrate is roughly: Opus > AAC > OGG Vorbis > MP3. But MP3 wins on compatibility - it plays everywhere.
What is Opus and when should I use it?
Opus is a modern audio codec that delivers the best quality per bit of any widely supported format. It excels at both speech and music. Use it for web audio, Discord bots, or any context where modern browser playback is guaranteed. For broader compatibility (older devices, car stereos), stick with MP3.