MP3 to FLAC

Lossless wrapper. No quality gain.

On-device. Instantly.

Drop your audio file here

or tap to browse

No upload
Works offline
No idea what's in your audio

Need to convert many audio files? The offline bundle handles batch conversion with no limits. $49 once.

Get Bundle →
// How it works

Three steps. Zero uploads.

01
Drop
Drop your MP3 file into fwip.
02
Convert
fwip re-encodes to lossless FLAC in your browser — no upload, no waiting for a server.
03
Download
Download the FLAC file. Compatible with all major media players and DAWs.
// Why this is different

Convert audio without uploading it.

Most audio converters send your files to a server to process. fwip converts MP3 to FLAC entirely in your browser using WebAssembly. Your audio never leaves your device.

fwip works differently. The processing engine runs entirely in your browser. Your MP3 is read from your device, processed on your CPU, and the result is saved back to your device. No server is involved. We literally cannot see your file.

No server processing

Everything runs on your device using WebAssembly. Your file never touches a network.

No account required

Drop a file. Get a result. No sign-up, no email, no password.

No subscription

Free in the browser. $99 once for the offline bundle. That's it. Forever.

Works offline

The desktop version works with no internet connection at all.

Use it free in your browser. Own it offline for $15. Convert any audio format, anywhere.
// How fwip compares

fwip vs the rest.

fwipAdobe AuditionOnline Audio ConverterCloudConvert
Upload requiredNoNo (desktop)YesYes
Account requiredNoYesNoFree tier
Price$15 / tool$23/mo ($276/yr)Free (ad-supported)Free (25/day) / $9/mo ($108/yr)
Files leave deviceNeverNoYesYes
Works offlineYesYesNoNo
Batch processingOffline bundleYesLimitedYes
// Questions

Frequently asked.

How do I convert MP3 to FLAC?▾
Drop your MP3 file into fwip. It converts to FLAC in your browser. Download the result.
Is my audio file uploaded?▾
No. Conversion runs entirely in your browser using WebAssembly. Your audio file never leaves your device.
Will converting MP3 to FLAC improve quality?▾
No. MP3 is a lossy format — the quality lost during original MP3 encoding cannot be restored. Converting to FLAC produces a lossless file, but the audio data is the same as the MP3.
Why convert MP3 to FLAC?▾
Some DAWs, archival workflows, or streaming ingest systems require lossless formats. Converting to FLAC satisfies those requirements, even if the source was lossy.
Can I convert offline?▾
Yes. The offline version ($15, one payment) works without internet. Useful for secure environments or when processing sensitive audio.
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Offline. No browser. No internet. No excuses.
$15
This tool
  • MP3 to FLAC · offline
  • Batch processing
  • No file size limit
  • 3 devices · one payment
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  • Batch processing
  • No file size limit
  • 3 devices · one payment
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Complete suite
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One-time payment · 3 devices · Updates included · Mac + Windows + Linux