PDFCure
Alla verktyg

Compress MP3

Shrink an MP3 by re-encoding it at a lower bitrate — in your browser.

Select an audio file

Re-encode an MP3 at a lower bitrate to shrink it — pick the bitrate below. Runs in your browser.

Klicka för att välja, eller släpp en fil här

Så här Compress MP3

  1. 1

    Add your MP3

    Drop in the file you want smaller.

  2. 2

    Pick a bitrate

    128 kbps for voice, 192 for a good default — lower bitrate, smaller file.

  3. 3

    Compress and download

    Click Compress; it's re-encoded in your browser.

Related PDF tools

Audio ConverternewConvert MP3, WAV, M4A, AAC, FLAC or OGG to MP3 or WAV — entirely in your browser.WAV to MP3newCompress a WAV to MP3 at the bitrate you choose, in your browser.Split AudionewCut an audio file into equal parts, delivered as a zip — in your browser.Trim AudionewCut an audio file to just the part you want, with a visual waveform.

Compress MP3 — vanliga frågor

How much smaller will it be?+

It depends on the original bitrate. Going from 320 to 128 kbps roughly halves the file; the tool shows the before/after size.

Is quality lost?+

Yes — re-encoding an MP3 at a lower bitrate discards more detail. 192 kbps is a good balance; 128 is fine for speech.

Is my file uploaded?+

No. It's decoded and re-encoded in your browser with a JavaScript LAME port.

Can I set a target size?+

Not directly here — pick the bitrate. Lower bitrate, smaller file.

Laddar ni upp mina filer till en server?+

Nej — alla verktyg här bearbetar dina filer helt på din enhet, och inget laddas upp till en server. Det enda undantaget är AI-verktygen, som skickar den extraherade texten (inte filen) till Claude för att göra sitt jobb.

Finns det en filstorleksgräns?+

Vi sätter ingen konstgjord gräns, men eftersom bearbetningen sker i din webbläsare begränsas mycket stora filer (500+ MB eller 1 000+ sidor) av din enhets minne, inte av oss.