WAV to FLAC Converter
Upload WAV files or drag and drop
WAV files. Converted to lossless FLAC in your browser - nothing is uploaded.
Conversion runs entirely in your browser using WebAssembly. Your audio is never uploaded. Large files use more memory, so very long recordings may be slow on older devices.
Compress WAV files into FLAC without losing any quality, right in your browser. FLAC is lossless, so it sounds identical to the WAV but typically takes 30-60% less space, which makes it ideal for archiving masters and backups. Add one file or a batch, choose the compression effort, and convert on your device. Nothing is uploaded, so your recordings stay private and it works offline once loaded.
How to use this tool
- 1Drop your WAV files onto the upload area, or click to browse.
- 2Choose a compression level: Standard is a good default, Maximum makes the smallest file but takes longer.
- 3Click Convert to FLAC. Each file encodes losslessly on your device.
- 4Download each FLAC, or download the batch as a zip.
Example
Add a 50 MB WAV, choose Maximum compression, and convert. The FLAC often lands around 25-35 MB with the exact same audio. Decoding it later gives back bit-for-bit the original PCM.
Drop a folder of WAV takes, keep Standard compression for speed, convert, and download the zip. You get a smaller lossless archive that is quick to produce.
Common use cases
- Archiving WAV masters as FLAC to save disk space with zero quality loss
- Backing up a recording session in a smaller lossless format
- Preparing lossless files for a music player or library that supports FLAC
- Sharing a lossless copy that is smaller than the original WAV
Common mistakes
- Expecting FLAC to be as small as MP3 - FLAC is lossless, so it is larger than MP3 but keeps full quality. Use MP3 when small size matters more than fidelity.
- Thinking Maximum compression sounds different from Standard - all FLAC levels are lossless and sound identical, they only differ in file size and encoding time.
- Converting a WAV that came from an MP3 and expecting to regain quality - FLAC preserves whatever is in the WAV, including any loss already present.
- Using FLAC where the target device only supports MP3 or WAV - check compatibility before archiving only in FLAC.
Frequently asked questions
Is FLAC really lossless?
Yes. FLAC compresses audio without discarding any data, so decoding a FLAC gives back exactly the original PCM samples. It sounds identical to the WAV source, unlike MP3 or OGG which are lossy.
How much smaller will the FLAC be?
Typically 30-60% smaller than the WAV, depending on the material. Busy, complex audio compresses less than sparse or quiet audio. A 50 MB WAV commonly becomes a 25-35 MB FLAC with no quality loss.
Does the compression level change the sound?
No. Every FLAC compression level is lossless, so they all sound the same. Higher levels just work harder to make a slightly smaller file and take a little longer to encode. Standard is a good balance.
Is my WAV uploaded to a server?
No. The WAV is read and the FLAC written entirely in your browser using WebAssembly. Your audio never leaves your device, so it is safe for private masters, and the tool works offline once the page has loaded.
When should I use FLAC instead of MP3?
Use FLAC when you want to save space but keep perfect quality, such as archiving masters or building a lossless library. Use MP3 when you need the smallest possible files for sharing, streaming or limited storage.
Can I convert several WAV files at once?
Yes. Add a batch and they encode one after another. When more than one is finished you can download them together as a single zip archive instead of saving each file separately.
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