Is this WAV to AAC converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple WAV files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

What bitrate will the converted audio use?

We default to 192 kbps for MP3, 128 kbps for OGG/Opus, and 320 kbps for M4A/AAC. These settings are perceptually transparent — most listeners can't tell the difference in a blind test.

Will my metadata (ID3 tags, album art) be preserved?

Yes, when both formats support it. Tags carry over on conversions like MP3→M4A or FLAC→MP3. WAV has limited tag support, so some metadata may not transfer.

How much smaller is AAC compared to WAV?

A typical WAV file is 10 MB/minute. An equivalent AAC at 256 kbps is about 2 MB/minute — roughly 5x smaller, with no perceptible quality difference for most listeners.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

WAV to AAC — Free, Compress Audio, No Upload

How to convert WAV to AAC online

1
Drop your WAV file
Drag and drop your Waveform Audio File Format file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Waveform Audio File Format → Advanced Audio Coding entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your AAC
Your Advanced Audio Coding file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

WAV vs AAC: format overview

WAV

Waveform Audio File Format

Microsoft and IBM · 1991

Compression: none
Transparency: No

✓ Lossless — no quality degradation
✓ Universal DAW compatibility for production
✗ Extremely large file sizes

AAC

Advanced Audio Coding

Dolby, Fraunhofer, Sony, Nokia · 1997

Compression: lossy
Transparency: No

✓ Successor to MP3 — better quality at same bitrate
✓ Native support across Apple, Android, YouTube

WAV magic bytes: 52 49 46 46 xx xx xx xx 57 41 56 45

AAC magic bytes: FF F1 (ADTS) / 00 00 00 xx 66 74 79 70

Why convert WAV to AAC?

WAV files are uncompressed and carry audio at full fidelity, but their size makes them impractical for distribution. A three-minute song stored as a 44.1 kHz 16-bit stereo WAV is roughly 30 megabytes. The same track as a 256 kbps AAC file is around 6 megabytes, less than a fifth the size. When you are preparing audio for an iOS application, submitting music to Apple Music for distribution, or creating audio that will be streamed over a cellular connection, WAV is simply too large.

AAC is the preferred streaming and distribution format on Apple platforms and is widely supported across Android, web browsers, and modern media players. Apple Music, Spotify, Amazon Music, and most major streaming services transcode submitted audio to AAC for delivery. If you are developing an iOS app and embedding sound effects or music, Xcode and AVFoundation work most efficiently with AAC files. Podcast platforms and audiobook distribution services also accept AAC through the M4A container.

Converting WAV to AAC applies lossy compression for the first time to the uncompressed source, which means this is the most favorable scenario for AAC encoding. Unlike converting between two lossy formats, encoding a WAV to AAC at 256 kbps produces output that is essentially transparent, meaning the quality difference compared to the WAV is inaudible to most listeners even on high-quality playback systems. Stereo imaging, frequency response, and dynamic range are all well-preserved. The output file is immediately compatible with iTunes, iPhones, iPads, and all major audio platforms.

Quality & file size: WAV to AAC

Typical file sizes: WAV 30–50 MB → AAC 2–5 MB.

Both WAV and AAC use lossy compression. We transcode at high quality settings (equivalent to AAC's recommended web quality) to minimize generational loss.

Color depth: WAV supports standard color, AAC supports standard color.

Transparency: WAV does not support transparency. AAC does not support transparency — transparent areas become solid white.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your WAV files are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.