Convert MP3 to FLAC Online

Convert MPEG Audio Layer III (.mp3) files to Free Lossless Audio Codec (.flac) format online for free. Fast, secure, and no sign-up required. Your files are automatically deleted within 1 hour.

Free online mp3 to flac converter — no software needed. Instantly change, transform, and export your files in seconds.

MP3FLAC

Drag & drop your file here

or browse to select — accepts .mp3 (max 10MB)

How to Convert MP3 to FLAC Online

1. Upload Your File

Select or drag your .mp3 file into the converter

2. Convert Instantly

Your file is converted from .mp3 to .flac in seconds

3. Download Result

Download your converted .flac file to any device

Best Free MP3 to FLAC Converter

Lightning Fast Conversion

Convert .mp3 to .flac in seconds. No waiting, no queues — instant processing.

100% Secure & Private

All files are encrypted in transit via HTTPS and auto-deleted within 1 hour. Your data stays private.

Works on Any Device

Browser-based converter — works on Windows, Mac, Linux, iOS, Android, and Chromebook. No installation needed.

No Sign-Up Required

Start converting immediately. No registration, no email, no watermarks on your converted files.

When to Convert MP3 to FLAC

Sharing & collaboration

Send mp3 files to people who only have flac-compatible software, without losing layout or formatting.

Cross-platform compatibility

Open and edit your mp3 file on devices that don't support it natively by converting to flac once.

MP3 vs FLAC — Why Convert?

MP3 (MP3)

Standard MP3 file format
Widely used across platforms
MP3 files may have specific features
May require specific software to open

FLAC (FLAC)

FLAC format for broader compatibility
Easy to share and distribute
Supported by many applications
Ideal for your target workflow

MP3 to FLAC — Frequently Asked Questions

Is MP3 to FLAC conversion free?

Yes! Reformat offers free MP3 to FLAC conversion. Free users get 3 conversions per day. Upgrade to Pro for unlimited conversions.

How do I convert .mp3 to .flac?

Simply upload your MP3 audio file, click Convert, and download your FLAC audio file. The entire process takes just seconds.

What is the maximum file size?

Free users can convert files up to 10MB. Pro users get up to 100MB, and Business users get up to 500MB.

Is my file safe?

Absolutely. All files are processed securely and automatically deleted from our servers within 1 hour. We never access or share your data.

Can I convert multiple files at once?

With a Pro or Business account you can batch convert multiple files. Free users can convert one file at a time.

Is the MP3 to FLAC converter free?

Yes. Anonymous users get 5 free conversions per day; signed-in users get 10/day plus 2 AI uses. Pro removes the daily limit and raises the file-size cap.

What is the maximum file size for MP3 to FLAC?

Free users can upload files up to 10MB. Pro raises this to 100MB and Business to 500MB.

Is it safe to upload my mp3 file?

Files are uploaded over HTTPS, processed on our servers, and deleted within 1 hour. We do not read, share, or train on file contents.