FileopiaAudio Converter
Convert audio to MP3 or WAV in your browser. Supports M4A, AAC, OGG, OPUS, FLAC and video files. Free and private.
- Upload
- Options
- Download
- ✓ 100% free
- ✓ No sign-up
- ✓ No limits
- 🔒 Files never leave your device
How to: Audio Converter
- Select audio files.
- Choose MP3 or WAV and the quality.
- Download.
Voice memos, WhatsApp audio, FLAC music and recordings from different apps come in many formats. Converting to MP3 or WAV makes them play on any device and import into any editor.
Common uses
- Convert iPhone voice memos (M4A) to MP3.
- Turn OGG/OPUS messages into MP3.
- Convert FLAC to MP3 for phones with limited space.
Tips for best results
- Choose WAV for editing, MP3 for sharing.
- Batch convert a folder at once.
Common audio formats
M4A/AAC is used by iPhones and many apps; OGG and OPUS are common in messaging apps and browsers; FLAC is lossless music; MP3 is the most compatible. WAV is uncompressed and preferred by editors. Converting to MP3 or WAV makes audio work in virtually every player, car stereo and editor.
Extracting audio from video
You can also drop a video file to extract its soundtrack, useful for lectures and recordings.
Why use Fileopia for Audio Converter?
| Fileopia | Typical upload-based sites | |
|---|---|---|
| Files uploaded to a server | No – processed on your device | Yes |
| Sign-up required | Never | Often for bigger jobs |
| Hourly / daily task limits | None | Common on free plans |
| Watermark on output | Never | Sometimes |
| Works offline after loading | Yes, for most tools | No |
Your files never leave your device
Audio Converter runs entirely in your browser using JavaScript and WebAssembly. Your files are read from your disk into this tab, processed in memory and saved straight back to your downloads folder – they are never uploaded to Fileopia or any third party.
- Test it yourself: once this page has loaded, switch off Wi‑Fi or mobile data and run the tool – it keeps working.
- Check the network: open your browser’s developer tools (F12 → Network) while processing; you will see no file upload requests.
- Nothing to delete: close the tab and the data is gone – there is no server copy, no retention period and no account.
Frequently asked questions
Which input formats work?
Any format your browser can decode, including M4A, AAC, OGG, OPUS, FLAC, WAV and common video files.
Is the original quality kept?
Converting to WAV preserves the decoded audio exactly; MP3 uses the bitrate you choose.
Is Audio Converter really free?
Yes. Every tool on Fileopia is 100% free with no file limits, no sign-up and no watermarks. The site is supported by unobtrusive ads.
Are my files uploaded to a server?
No. Fileopia processes your files directly in your browser using JavaScript. Your documents never leave your device, so they stay completely private.
Does it work on mobile?
Yes. Fileopia works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux.