About converting MP3 to FLAC
Convert MP3 to FLAC online for free - the conversion happens locally in this tab, so your file never gets uploaded to a server. MP3 is the universally compatible lossy audio codec - not the most efficient one any more, but the one that plays on absolutely every device ever built. FLAC compresses audio losslessly to roughly half size, so it is bit-for-bit identical to the source on decode - the archivist's choice for music libraries.
The MP3-to-FLAC conversion is the usual trade between fidelity and footprint: lossless formats preserve every sample for editing and archiving, while lossy ones fit far more music onto a device.
Because every conversion runs on your own device through WebAssembly builds of the same open-source engines desktop tools use, there is no upload queue, no file-size cap imposed by a server, and no copy of your MP3 sitting in someone else's storage afterwards. That matters most for anything you would hesitate to hand to a third party - identity documents, contracts, medical scans, unreleased work, client material. It also means the converter keeps working with no network connection at all once the page has loaded.
MP3 to FLAC is one of many routes available here. If a direct path between two formats does not exist, the converter automatically chains several conversions together to reach the one you asked for, so you can get from almost any input to almost any output in a single step.
How to convert MP3 to FLAC
- Drop your MP3 file onto the area above, or click it to browse for one.
- Confirm that "Convert from:" reads MP3 - it is detected from your file automatically.
- Check that "Convert to:" is set to FLAC. It is already pre-selected on this page.
- Press Convert, then save the converted audio file when it is ready.
Frequently asked questions
- Is this MP3 to FLAC converter free?
- Yes, completely. There is no charge, no account, no watermark on the output and no daily conversion limit.
- Are my files uploaded to a server?
- No. The conversion runs in your browser using WebAssembly, so your MP3 file never leaves your device and nothing is stored anywhere after you close the tab.
- Is there a file size limit for MP3 to FLAC conversion?
- There is no server-imposed limit, because there is no server involved. The practical ceiling is your own device's available memory, so very large files convert faster on a desktop than on a phone.
- Does converting MP3 to FLAC reduce quality?
- It depends on the target format. FLAC output is produced at high quality settings, but converting into a lossy format always discards some data by design, and re-encoding an already-lossy file compounds that. Convert from the highest-quality source you have rather than from a previously converted copy.
NEXINVATE