MP3 to FLAC Converter

Place your MP3 into a lossless FLAC container that locks in its current quality. Free, in your browser, with no signup.

Select MP3 file →

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Click or drag and drop to upload files

We support most file types including: MP4, MOV, WEBM, AVI, MP3, WAV, PNG, JPEG, GIF, MKV, PDF, FLAC, TIFF!

EchoWave is used by creators, marketers, educators, and businesses to convert and edit media online.

Updated June 2026

FLAC is a lossless format, so it stores audio with no further compression loss. Converting MP3 to FLAC will not rebuild detail your MP3 already discarded, but it does lock in the quality you have so later edits and re-encodes do not chip away at it. The trade is size: a FLAC is usually several times larger than the MP3 it came from.

Free, no sign-upNo account, no trial

Runs in your browserNothing to install

Works on every devicePhone, tablet, laptop

No watermarkClean output, every time

How it works

How to convert MP3 to FLAC

1
Upload your MP3
Drag your MP3 onto the converter or pick it from your device. Nothing to install.
2
Choose FLAC and convert
Select FLAC as the output, set the bitrate if it applies, then start. Free, with no sign-up.
3
Download your FLAC
Save the finished FLAC, or open it in the editor to trim or adjust it first.

Try it

Estimate your FLAC

Pick a typical rate and a length to see the FLAC file size before you convert.

Typical rate

Length10 min

1 min60 min

Estimated FLAC size66MBTypical music

FLAC is lossless, so the real size depends on the music. These are typical ranges.

The formats

MP3 vs FLAC

MP3

MPEG-1 Audio Layer III

The most universal audio format ever made

Type: Lossy audio format
Holds: Audio only
Typical size: Small, about 1 MB per minute at 128 kbps
Plays on: Effectively everything

Best for:Music, podcasts, and audio you listen to

FLAC

Free Lossless Audio Codec

Lossless audio at about half the size of WAV

Type: Lossless audio format
Holds: Compressed audio with no quality loss
Typical size: About half the size of WAV
Plays on: VLC and most players, not older iPhones by default

Best for:Archiving music at full quality

Will it lose quality?

Converting a lossy file to a lossless one cannot restore detail that was already discarded. It only makes a larger file.
Going from a high-quality source to FLAC keeps the sound clear while changing the format.
Each pass between two lossy formats loses a little, so always convert from the best source you have.

Use cases

What people use it for

Music librariesStandardise your collection

ListenersUse a format your player likes

PodcastersMatch your host requirements

EditorsImport audio your tool accepts

DevicesPlay on phones and car stereos

Troubleshooting

If something looks off

The FLAC is larger than I expected

Lossless and uncompressed formats are big by design. If you want a smaller file, pick a lossy format and a bitrate around 192 to 256 kbps.

The song details are missing

Title, artist, and album travel as tags when the source has them. If they are blank, add them in any music app after converting.

My app will not open the FLAC

Most apps open common audio, but a few are picky. VLC plays almost anything, or convert to MP3 for the widest support.

FAQ

MP3 to FLAC questions

Is the MP3 to FLAC converter free?

Yes. EchoWave converts MP3 to FLAC with no signup, no file-count limit, no trial, and no watermark. Upload your MP3, convert it, and download the FLAC from your browser.

How do I convert MP3 to FLAC?

Upload your MP3, choose FLAC as the output format, and start. Download the FLAC when it finishes, or open it in the editor to trim it first.

Does converting MP3 to FLAC improve quality?

No. FLAC is lossless, but it can only preserve what is in the file, not recreate what MP3 encoding threw away. The FLAC will sound the same as your MP3, just stored without any extra loss.

Then why convert MP3 to FLAC at all?

It is useful for keeping a master copy. Once your audio sits in FLAC, every later trim, edit, or format change starts from a lossless source, so the quality you have now does not erode through repeated re-encoding.

Why is the FLAC file so much larger?

A FLAC from an MP3 is typically three to five times the size, which is normal for lossless storage. The MP3 was compressed by discarding audio, while FLAC keeps every sample it is given, so the file grows even though the sound does not change.

Once I convert MP3 to FLAC, what plays the FLAC file?

VLC, most modern music players, Android, and many hi-fi devices play FLAC. Older iPhones did not support it by default, though recent versions and the Files app do. If a player refuses it, MP3 or M4A give wider reach.

Does the MP3 to FLAC converter work on iPhone, Android, Mac, and Windows?

Yes. The converter runs in any browser, so you can convert MP3 to FLAC on iPhone, iPad, Android, macOS, Windows, Chromebook, and Linux with nothing to install.

Are the song tags kept?

Title, artist, and album carry over as tags when your MP3 has them. If a field arrives blank, add it in any music app after converting.

Can I convert several MP3 files to FLAC?

Yes. There are no file-count limits on these pages, so you can convert your MP3s to FLAC one after another. Because FLAC files are large, each one takes a little longer to download.