Convert MP3 to FLAC online. Batch Convert, Cut & Compress Videos and Audio

This tool converts MP3 to FLAC completely free and without any functional limitations. Since it is based on the browser API, the processing speed is the fastest because all files are processed locally on your device and are not uploaded to our server.

About MP3 files

MP3 (MPEG-1 Audio Layer III) is a widely used digital audio format that compresses sound files with minimal quality loss, making them smaller for easy storage and streaming. Developed in the 1990s, it became the standard for music sharing and portable players. MP3 uses lossy compression to remove inaudible frequencies, balancing file size and audio fidelity. Though newer formats like AAC and FLAC offer better efficiency or quality, MP3 remains popular due to its universal compatibility across devices and platforms.

About FLAC files

FLAC (Free Lossless Audio Codec) is a high-quality audio format that compresses audio files without losing any sound quality, making it ideal for archiving and audiophiles. It retains all original audio data while reducing file sizes by up to 50% compared to uncompressed formats like WAV. FLAC is widely supported across devices and software, though not natively playable on some portable players. As a royalty-free open format, it's popular among music enthusiasts for preserving studio-quality recordings without the large file sizes of uncompressed audio.

Batch Convert MP3 to FLAC Online

With this SoConvert tool, you can convert multiple MP3 files to FLAC directly in your browser for free. You can also adjust the audio Bitrate during conversion.

Click the Options button in the top-right corner to open the settings panel, where you can customize the output FLAC audio Bitrate.

Other Settings Explained:

Encoding Speed: Choose the encoding speed. Faster speeds result in larger file sizes.

Audio Bitrate: Recommended range is 8 – 320 Kbps.

Cut Audio: Trim the audio using a start and end time in HH:MM:SS format. For example, setting 00:00:05 to 00:00:08 will cut a 3-second clip from the audio.

Before converting, you can choose a local folder to save the converted FLAC files. Once an MP3 file is successfully converted, it will be automatically saved to your selected directory—no manual download required.

Save All: After all MP3 files are converted, click “Save All” to export every FLAC file to your chosen folder in one go.