filoshi.com / formats / mp3-to-flac

Convert MP3 to FLAC

The MP3 format is commonly used by specialized software. By converting it to FLAC, you reduce file size and increase compatibility. Filoshi runs this conversion completely offline.

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How to convert MP3 to FLAC for free

  1. 1
    Drop your MP3 file
    Drag it onto the converter above, or click Browse Files to select it from your computer.
  2. 2
    Click Convert
    FLAC is auto-selected. Hit Convert - FFmpeg.wasm processes everything locally in your browser.
  3. 3
    Download your file
    Your converted FLAC file downloads instantly. Nothing was uploaded to a server.
Source Format

What is MP3?

MPEG Audio Layer III (.mp3) - MP3 is the most popular audio format ever created. It uses lossy compression to reduce file sizes while keeping audio quality acceptable for most listeners.

Common use: Music playback, podcasts, audiobooks, general audio sharing

Output Format

What is FLAC?

Free Lossless Audio Codec (.flac) - FLAC compresses audio without any quality loss. Files are about half the size of WAV while being perfectly identical when decoded. It is the gold standard for music archival.

Common use: Music archival, audiophile playback, lossless music distribution

Frequently Asked Questions

Is converting MP3 to FLAC free?+
Yes! You can convert MP3 to FLAC for free right in your browser using Filoshi's online converter. No signup or software download needed. For batch conversion of multiple files, the Filoshi desktop app is available for a one-time $14.90 payment.
Does converting MP3 to FLAC lose quality?+
It depends on the formats involved. If both MP3 and FLAC use lossless compression, no quality is lost. If the conversion involves a lossy format, some quality reduction may occur, but Filoshi uses optimized settings to keep quality loss minimal. The conversion runs entirely on your machine, so there are no server-side compression artifacts.
Can I convert MP3 to FLAC without uploading my file?+
Absolutely. Filoshi processes everything locally on your computer. Your MP3 files are never uploaded to any server. Even the free browser converter runs entirely in your browser using WebAssembly, with no server involved.
How long does it take to convert MP3 to FLAC?+
Most conversions complete in seconds. Larger files (like high-resolution video) may take a bit longer depending on your computer's hardware. Since Filoshi runs locally, there is no upload or download wait time, which is significantly faster than online converters.
Can I batch convert multiple MP3 files to FLAC?+
Yes, the Filoshi desktop app supports batch conversion. You can drop an entire folder of MP3 files, select FLAC as the output format, and convert them all at once. Each file gets its own progress bar.

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Convert to FLAC

Need batch MP3 to FLAC conversion?
The web converter handles 1 file at a time. Filoshi desktop converts unlimited files, runs offline, and supports 3,000+ formats.
Get Filoshi Desktop - $14.90