Audio Converter

Get Lossless FLAC from Any MP3

Upload your MP3 and download a FLAC file ready for archiving, DAW editing, or audiophile playback. Works across all major platforms.

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Free Tool

Audio Format Converter

Upload any audio file, choose an output format, and download the converted result. Supports MP3, WAV, FLAC, AAC, OGG, ALAC, WMA, Opus and M4A.

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Open source audio format support across platforms

Open Source and Patent-Free

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Open Source and Patent-Free

FLAC is maintained by the Xiph.Org Foundation. There are no licensing fees, no patent encumbrances, and the reference encoder is open source. Every major platform supports it natively or through widely available libraries.

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Universal DAW and Player Compatibility

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Universal DAW and Player Compatibility

FLAC imports directly into Audacity, Adobe Audition, DaVinci Resolve, Reaper, and most other professional audio tools. It is also natively supported by foobar2000, VLC, Winamp, and every modern hi-fi streaming device.

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Compact Lossless: Smaller Than WAV

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Compact Lossless: Smaller Than WAV

FLAC applies lossless compression that typically reduces file size by 40 to 60% compared to uncompressed PCM WAV. You get bit-perfect audio and a more manageable archive footprint than raw WAV files.

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How It Works

Three steps to lossless FLAC

Upload your MP3 file

Drop your MP3 file onto the tool or click to browse. The format is validated before conversion starts.

Convert to FLAC

Click "Convert". The file is uploaded and processed by FFmpeg on our servers, encoded as lossless FLAC.

Download your FLAC file

When conversion is complete, preview the output in the browser player, then download your .flac file.

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Deep Dive

MP3 vs FLAC: What You Actually Need to Know

MP3 trades audio data for small file sizes; FLAC stores every sample intact. Here is what that difference means in practice.

Audiophile and professional audio equipment showcasing FLAC quality

FLAC: Open Lossless, Born in 2001

Developed by the Xiph.Org Foundation, FLAC (Free Lossless Audio Codec) has been the de-facto open lossless standard for over two decades. It supports up to 32-bit depth and 655 kHz sample rate, far exceeding any audible range.

TypeLossless compression

Bit depthUp to 32-bit

Container.flac (standalone) or .ogg

FLAC is patent-free and open source. There is no licensing cost for players, encoders, or hardware manufacturers.

MP3: Universal but Lossy by Design

MP3 uses psychoacoustic models to discard audio data the ear is least likely to notice, achieving files 5 to 10 times smaller than uncompressed audio. Once data is discarded it cannot be recovered.

TypeLossy compression

Typical bitrate128 to 320 kbps

Container.mp3

Converting MP3 to FLAC cannot restore lost audio data. It prevents any further degradation in subsequent edits or exports.

File Size: Larger Than MP3, Smaller Than WAV

FLAC typically compresses 40 to 60% smaller than raw PCM WAV while remaining bit-perfect. A 10 MB MP3 may become 60 to 90 MB as FLAC. That is the expected trade-off for a lossless archive.

vs WAV40 to 60% smaller than uncompressed PCM

vs MP3Typically 4 to 8x larger than the source MP3

Rich Metadata with Vorbis Comments

FLAC uses Vorbis comment tags which support arbitrary key-value fields. Track title, artist, album, year, genre, and custom fields are all stored directly in the file, fully compatible with foobar2000, VLC, and MusicBrainz Picard.

Tagging standardVorbis comments (key = value pairs)

Compatible taggersfoobar2000, MusicBrainz Picard, beets, Mp3tag

Pro tip: keep your master FLAC and re-encode to lossy formats for streaming. Never compress a compressed file twice.

Benefits

Why Use This Converter

🔓

Open and Patent-Free

FLAC is maintained by the Xiph.Org Foundation. No licensing fees, no codec purchases, supported everywhere.

⚡

Fast Conversion

Most MP3 files convert to FLAC in under 30 seconds on our dedicated servers.

⚙️

FFmpeg-Powered

Industry-standard FFmpeg handles every conversion with accurate sample rates and channel mapping.

🎛️

Universal Compatibility

FLAC works in Audacity, foobar2000, VLC, Reaper, DaVinci Resolve, and virtually every hi-fi player.

Who Uses It

Who Converts MP3 to FLAC

Audiophiles, archivists, and audio professionals all have workflows that depend on lossless source files.

Audiophiles and audio professionals converting MP3 to FLAC

Audiophiles and Hi-Fi Enthusiasts

High-resolution DACs, amplifiers, and hi-fi streamers (Bluesound, Cambridge Audio, Naim) all prefer FLAC. Converting your MP3 library to FLAC ensures the cleanest possible source signal for high-end playback chains.

Recommended playersfoobar2000, Audirvana, Roon, Volumio

Music Archivists

Preserving a collection in lossless FLAC means it can be re-converted to any future format without further degradation. FLAC is the most widely supported lossless format outside the Apple ecosystem.

Audio and Video Editors

Audacity, Adobe Audition, DaVinci Resolve, and Reaper import FLAC natively. Working from a lossless source prevents artifact buildup across multiple edit-export cycles.

Podcast Producers

Starting from a lossless FLAC archive of your recordings gives you headroom for noise reduction, compression, and loudness normalization without generational quality loss.

Game Audio Designers

FLAC is supported by Godot, Wwise, and FMOD for audio asset pipelines. Converting reference MP3s to FLAC before integration keeps the pipeline lossless until the final encoding step.

Supported enginesGodot, Wwise, FMOD (import stage)

Educators and Researchers

Acoustics research and audio engineering courses frequently require lossless source files. FLAC is the open standard of choice for academic audio datasets and course materials.

Converts using FFmpeg on dedicated servers.

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Related Tools

Frequently Asked Questions

Does converting MP3 to FLAC improve audio quality?

No. MP3 is a lossy format and any audio data discarded during the original encoding is gone permanently. Converting to FLAC cannot recover that data. What you gain is a lossless container that prevents any further quality loss in subsequent edits or re-exports.

Why is the FLAC file larger than the original MP3?

FLAC stores every decoded audio sample without discarding any data, so lossless files are always larger than lossy compressed sources. A typical 10 MB MP3 can become 60 to 90 MB as FLAC. This is expected and correct.

Which players and apps support FLAC?

FLAC is supported natively by foobar2000, VLC, Winamp, Audacity, Reaper, DaVinci Resolve, most Android devices, and hi-fi streamers (Bluesound, Naim, Cambridge Audio). On macOS and iOS, FLAC requires VLC or a third-party player.

What is the difference between FLAC and WAV?

Both are lossless. FLAC applies lossless compression (reducing file size 40 to 60% compared to WAV) and supports rich metadata tagging via Vorbis comments. WAV is uncompressed PCM and is more universally supported in broadcast and professional DAW workflows.

Is there a file size limit?

The upload limit is 100 MB per file. Most typical MP3 tracks are well within this limit.

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Upload your file above and get lossless FLAC audio in seconds.