Convert MP3 to FLAC
This will not improve the audio. FLAC is lossless, but what MP3 discarded is gone and cannot be reconstructed — you get a file three times the size holding exactly the same sound. Do it only when something demands FLAC as an input format.
It happens on your device. Nothing is uploaded — including video.
↑ 0 bytes uploaded
What changes when you convert MP3 to FLAC
- FLAC is lossless, so nothing is thrown away at this step. It will not repair quality already lost in the MP3, and the file will usually be larger.
How to do it
- Drop your MP3 file above, or click to browse. A whole folder works too.
- FLAC is already selected. Change it on any row if you want something else.
- There is no quality setting, because FLAC is lossless and there is nothing to trade.
- Press Convert, then Save. Nothing left your machine.
Questions
- Is my MP3 file uploaded anywhere?
- No. The conversion runs inside this browser tab using WebAssembly. There is no server involved, which is why there is no file-size cap, no queue and no account. The counter in the header measures bytes this page sends, and it stays at zero.
- Is there a file size limit?
- No imposed limit, but a real one: a browser tab has roughly 1.8 GB of working memory. Onhand estimates before it starts and tells you if a file is too large, rather than failing halfway through.
- Does it work offline?
- After one visit, yes. The page and the codecs it has used are cached, and the badge appears only when the codecs for your chosen formats are genuinely available offline — not merely because something is installed.
- Can I convert several files at once?
- Yes. Drop a folder, or select many files. Each row gets its own target format, or you can set them all at once, and everything downloads as a single zip.