Lossless audio editing
Free Online FLAC Editor
Edit FLAC lossless audio files in your browser. Trim FLAC recordings, merge multiple FLAC files, convert FLAC to MP3 or WAV, and adjust volume. Free online FLAC editor that preserves lossless quality.
FLAC files stay on your device and are never uploaded to external servers.
Powered by FFmpeg WebAssembly for lossless FLAC processing.
All editing happens locally in your browser — no upload queue.
FLAC editing options
How to edit FLAC files online
- 1.Upload your FLAC file. The browser reads its duration, sample rate, bit depth, and file size automatically.
- 2.Choose your editing action — trim FLAC audio, merge FLAC files, adjust volume, change speed, or convert to MP3 or WAV.
- 3.Process the FLAC file locally in the browser, preview the result, and download the edited FLAC, WAV, or MP3 file.
Why use this FLAC editor?
Preserve lossless FLAC quality
FLAC is a lossless format. Edit your FLAC files and export back to FLAC or WAV to maintain studio-quality audio with zero data loss.
Edit FLAC without a full DAW
Trim, merge, and process FLAC files directly in the browser. No need to install a heavy desktop audio editor for simple FLAC edits.
Private FLAC processing
Your FLAC files are processed entirely in the browser. Lossless audio files are often large and valuable — they never leave your device.
Convert FLAC to MP3 for sharing
Keep your FLAC originals for archiving and create MP3 copies for sharing, streaming, or mobile playback.
Common use cases
- •Trim a FLAC recording to remove silence or unwanted sections while preserving lossless quality.
- •Merge multiple FLAC files into a single continuous lossless audio file.
- •Convert FLAC files to MP3 at 320 kbps for sharing when the recipient does not need lossless quality.
- •Adjust volume or normalize a FLAC recording before burning to disc or uploading to a music library.
Tips for better results
- ✓Always export as FLAC or WAV if you want to keep the lossless quality of your original recording.
- ✓When converting FLAC to MP3, use 320 kbps for the best MP3 quality. The file will be about 10x smaller than the FLAC original.
- ✓FLAC files can be large. If your device is low on memory, consider splitting very long FLAC recordings into shorter segments before editing.
FLAC editor FAQ
Is FLAC really lossless?
Yes. FLAC compresses audio without discarding any data. When decoded, the audio is bit-for-bit identical to the original recording. It typically achieves 50-60% compression compared to WAV.
Can I edit a FLAC file and keep it lossless?
Yes. If you export the edited file as FLAC, the output remains lossless. Quality loss only occurs when you choose a lossy format like MP3.
Is my FLAC file uploaded to a server?
No. All FLAC editing happens in your browser using FFmpeg WebAssembly. Your lossless files stay on your device.
What is the difference between FLAC and WAV?
Both are lossless, but FLAC files are compressed (typically 50-60% of WAV size) while WAV files are uncompressed. FLAC also supports metadata tags for artist, album, and track information.