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Why this runs on your computer

There is no upload: The work happens in this tab. Your file never travels, so there is no copy of it anywhere but your own disk.
Nothing to delete later: Sites that upload promise to delete your file afterwards. That promise only matters because the file was theirs to hold.
It works with the Wi-Fi off: The honest test. Turn off your connection and the tools keep working, because everything they need is already here.

Drop your file hereto load the tools

Nothing is uploaded — the tools run right here

Applies to every loaded image

Look Strength 100% Brightness Contrast Saturation Vibrance Vignette

Max width Format Shape

Shape Size Across Down Border

Text Where

100%

Convert MP3 to FLAC without uploading it

Turn a MP3 file into FLAC — here in this tab, with nothing uploaded.

How to convert MP3 to FLAC

Drop your MP3 file in.
Choose FLAC as the output.
Save the FLAC file.

Why this one stays private

Audio files are voice memos, interviews, recordings of people. Converting one elsewhere means uploading all of that.

Questions

Why convert MP3 to FLAC?

MP3 is the format that plays on absolutely everything. FLAC is lossless but compressed, so it keeps the quality without the bulk. Converting is how you move a file from the first situation to the second.

Which format should I pick?

MP3 to be sure it plays. FLAC or WAV when nothing may be lost.

Can I convert several at once?

Yes — drop them all in and they are handled together.

How to convert MP3 to FLAC

Why this one stays private

Questions

The same tool, other formats