How to Convert FLAC to MP3
- Choose your bitrate — Select the MP3 quality you want: 128 kbps for smaller files, 192 kbps for a good balance, 256 kbps for high quality, or 320 kbps for the closest approximation to your FLAC original.
- Add your audio — Drag and drop a FLAC file into the upload area, or click "browse files" to select one from your computer.
- Download — Click "Download MP3" to save the converted file. The conversion happens entirely in your browser.
What is a FLAC File?
FLAC (Free Lossless Audio Codec) is a lossless audio compression format, meaning it reduces file size without losing any audio quality. Unlike MP3 which permanently discards some audio data to achieve smaller sizes, FLAC compresses audio the way ZIP compresses files — the decompressed output is bit-for-bit identical to the original recording. FLAC files are typically 50-70% the size of equivalent WAV files while preserving CD-quality audio. The format is popular among audiophiles, music collectors, and for archiving recordings where preserving the original quality is important.
Why Convert FLAC to MP3?
FLAC files are significantly larger than MP3 files — a typical album might be 300-500MB in FLAC but only 60-100MB in MP3. More importantly, many devices and platforms don't support FLAC:
- Car stereos — Most car audio systems, especially older ones and those with USB/Bluetooth playback, support MP3 but not FLAC.
- Portable music players — While some high-end DAPs support FLAC, many affordable players and older iPods do not.
- Phones and tablets — iOS natively supports FLAC, but many Android music apps and older devices don't handle it well.
- Sharing and uploading — Social media, messaging apps, and many websites only accept MP3 for audio. FLAC files are also impractical to email due to size.
- Storage space — If you have a large FLAC music collection, converting to MP3 can free up significant storage space on your device.
Which Bitrate Should I Choose?
- 128 kbps — Acceptable quality for casual listening, spoken word, and podcasts. Smallest file size, roughly 1MB per minute.
- 192 kbps — Good balance of quality and file size. Recommended for most music. This is the default.
- 256 kbps — High quality. Very difficult to distinguish from lossless audio in most listening situations.
- 320 kbps — Maximum MP3 quality. The closest you can get to your original FLAC in MP3 format. Even trained listeners struggle to tell the difference in blind tests.
Supported Input Format
.flac
Supports standard FLAC files at all bit depths (16-bit, 24-bit) and sample rates (44.1kHz, 48kHz, 96kHz, etc.). Both mono and stereo files are supported.
Frequently Asked Questions
Is this FLAC to MP3 converter free?
Yes, completely free. No sign-up, no hidden fees, no watermarks. Convert as many audio files as you need.
Are my audio files uploaded to a server?
No. All processing happens locally in your browser using WebAssembly (ffmpeg.wasm). Your files never leave your device. We never see, store, or have access to your files.
How long does the conversion take?
The first time you use the tool, it downloads the converter engine (~31MB). This is cached by your browser for future visits. The actual conversion time depends on your file size and device — most FLAC files convert in well under a minute.
What bitrate should I choose?
192 kbps is the default and works well for most music. Since your source is lossless FLAC, you may want to choose 320 kbps to preserve as much quality as possible. Use 128 kbps only for spoken word or when file size is the top priority.
Will I lose audio quality?
Yes, converting from lossless FLAC to lossy MP3 does involve some quality reduction. However, at 192 kbps or higher, the difference is extremely difficult to notice in normal listening conditions. At 320 kbps, even audio professionals struggle to distinguish MP3 from FLAC in blind tests.
Is there a file size limit?
There's no hard limit, but since conversion happens in your browser's memory, very large files (over 500MB) may be slow or cause issues. For best results, keep files under 500MB.
What is a FLAC file?
FLAC (Free Lossless Audio Codec) is a lossless compression format that preserves perfect audio quality while reducing file size. It's popular among audiophiles and for music archiving. However, many devices and apps don't support FLAC, which is why converting to MP3 — the universal audio format — is often necessary.
What devices does this work on?
This converter works on any device with a modern web browser — Windows, Mac, Chromebook, and Linux. Mobile devices may have limited memory for large files. No software to install.