Convert MP3 into a FLAC container for software, archiving, or workflows that specifically require .flac input. No signup, no software, and local browser processing for files from your device.
Drop a MP3 or another supported file here to convert, or import from:
A MP3 to FLAC converter decodes lossy compressed audio and creates losslessly compressed audio. Convert MP3 into a FLAC container for software, archiving, or workflows that specifically require .flac input.
FLAC cannot restore audio information already removed by MP3 compression. The result is losslessly stored, but its audible quality remains limited by the MP3 source.
Upload MP3 or another supported source while this workflow keeps FLAC as the destination format.
Convert one file or process up to 10 tracks sequentially, then download individual FLAC files or a ZIP.
Choose compatible encoding settings, retain detected source parameters where possible, and estimate the FLAC size before conversion.
FLAC cannot restore audio information already removed by MP3 compression. The result is losslessly stored, but its audible quality remains limited by the MP3 source.
Use the focused FLAC workflow for one file or a batch, then review settings and size before local conversion.
Drop one file into the uploader, or choose Batch Convert for up to 10 files. Source formats and technical details are detected automatically.
Choose the available FLAC settings or keep compatible source parameters, then review the estimated output size.
Start sequential browser processing, preview a single result, or save batch files individually or together in a ZIP archive.
Choose this format direction when FLAC's compatibility or workflow fit matters more than keeping the original MP3 container.
Create a .flac file for software, a dataset, or a delivery system that does not accept MP3.
Decode the MP3 once and store that decoded signal in FLAC before a workflow that would otherwise re-encode repeatedly.
Use FLAC when a technical pipeline requires one losslessly stored container, while retaining the original MP3 too.
These recommendations are specific to MP3 sources and FLAC delivery rather than generic conversion advice.
FLAC cannot restore information removed by MP3. The output is losslessly stored but still reflects the MP3 source.
Decoded MP3 audio usually compresses into a FLAC that is substantially larger than the original without sounding better.
Retain the original file so future users know the signal originated from a lossy source rather than a lossless master.
The formats solve different delivery needs. Keep the source when you may need its original quality or metadata, and create FLAC as the working or listening copy.
| Format detail | MP3 | FLAC |
|---|---|---|
| Format type | lossy compressed audio | losslessly compressed audio |
| Typical file size | Small | Medium to large |
| Quality model | Lossy | Lossless |
| Best used for | Everyday playback, sharing, websites, cars, and older devices | Archiving, high-quality libraries, and future conversion |
| Compatibility | Near-universal | Strong in modern players, but not universal on older hardware |
The FLAC output will usually be larger than the MP3 without sounding better. Use it only when FLAC compatibility is required.
Add a MP3 file, confirm FLAC as the output, select Convert Audio, and download the finished file. The conversion runs in your browser for files chosen from your device.
FLAC cannot restore audio information already removed by MP3 compression. The result is losslessly stored, but its audible quality remains limited by the MP3 source.
The FLAC output will usually be larger than the MP3 without sounding better. Use it only when FLAC compatibility is required.
Convert MP3 into a FLAC container for software, archiving, or workflows that specifically require .flac input.
Files selected from your device are decoded and encoded locally in the browser. Imports from a link, Dropbox, or Google Drive first use the selected provider and configured import service.
Single files are limited to 200 MB. Batch mode accepts up to 10 files or 500 MB total and processes them sequentially to reduce browser memory pressure.
Yes. Switch to Batch Convert, add up to 10 supported files, and download each FLAC result separately or together in a ZIP archive.
Yes. FLAC remains the output for this focused page, but the uploader accepts every supported audio source and MP4 audio input. Use the main Audio Converter to choose a different output.
Convert MP3, WAV, M4A, FLAC, OGG, AAC, AIFF, WMA, Opus, and AMR, with optional MP4 audio input and ALAC output.
Convert MP4, MOV, AVI, MKV, WEBM, FLV, or WMV entirely in your browser.
Detect monophonic pitch, clean up timing, transpose notes, preview the result, and export a standard MIDI file.
