Convert MP3 to FLAC
Free online MP3 to FLAC converter — no signup, no watermark
Convert MP3 (MPEG-1 Audio Layer III) files to FLAC (Free Lossless Audio Codec) format online for free. Our MP3 to FLAC converter runs entirely in your browser — just drag in your file, click convert, and download the result. No software to install, no account required, and your files stay private.
How to convert MP3 to FLAC in 4 steps
- 1
Upload your MP3 file
Drag and drop your MP3 file into the converter, or click to browse from your device. We support files up to 2GB.
- 2
Choose FLAC as the output format
FLAC is pre-selected. Optionally adjust quality, resolution or bitrate if your file needs custom settings.
- 3
Convert MP3 to FLAC
Click the convert button. Our converter processes your MP3 file and produces a high-quality FLAC output, usually in under a minute.
- 4
Download your FLAC file
Once conversion is complete, download your FLAC file. Your original MP3 stays untouched and we delete uploaded files within an hour.
Why convert MP3 to FLAC?
MP3 is the most popular audio format in the world. It uses lossy compression to deliver small file sizes with reasonable quality, and works on virtually every device, app and platform ever made. FLAC is an open-source lossless audio format that compresses files by 30–60% with zero quality loss. It's the favorite of audiophiles and music archivists who want CD-quality sound without the bulk of WAV. Converting from MP3 to FLAC is useful when you need high-resolution music libraries or want to take advantage of truly lossless compression.
Top reasons to switch to FLAC
- High-resolution music libraries
- CD ripping and audio archiving
- Audiophile listening setups
- Backing up master recordings
MP3 vs FLAC: side-by-side
MP3
Pros
- + Universal support on every platform
- + Very small file sizes
- + Good quality at moderate bitrates
Cons
- − Lossy — some audio quality is permanently discarded
- − Outperformed by AAC and Opus at low bitrates
- − Not ideal for professional editing
FLAC
Pros
- + Truly lossless compression
- + Smaller than WAV by roughly half
- + Open-source and royalty-free
- + Supports rich metadata and album art
Cons
- − Larger files than lossy formats like MP3 or AAC
- − Not supported natively in older devices
- − Limited iOS support before recent versions
MP3 to FLAC — Frequently Asked Questions
Is converting MP3 to FLAC free?
Is converting MP3 to FLAC free?
Yes, our MP3 to FLAC converter is 100% free. There are no hidden fees, no signups required, and no watermarks added to your converted FLAC files.
Will I lose quality converting MP3 to FLAC?
Will I lose quality converting MP3 to FLAC?
Our converter uses high-quality encoding settings to preserve as much of the original MP3 quality as possible in the FLAC output. For lossless results, choose the "high quality" preset.
How long does MP3 to FLAC conversion take?
How long does MP3 to FLAC conversion take?
Most MP3 files convert to FLAC in 30 seconds to a few minutes, depending on the file size, duration, and your internet connection. Larger files take longer.
Is it safe to upload my MP3 file?
Is it safe to upload my MP3 file?
Yes. All uploads use encrypted HTTPS connections, files are processed on isolated servers, and converted FLAC files are automatically deleted within one hour of conversion.
Can I convert MP3 to FLAC on mobile?
Can I convert MP3 to FLAC on mobile?
Absolutely. Our MP3 to FLAC converter works in any modern browser on iPhone, Android, iPad, Windows, macOS and Linux — no app install required.
What's the maximum file size for MP3 to FLAC?
What's the maximum file size for MP3 to FLAC?
You can convert MP3 files up to 2GB to FLAC for free. For larger files, contact us about our batch and premium options.
Related audio conversions
Other format pairs people convert alongside MP3 to FLAC.