Audio Cutter: Trim a Song in Your Browser Without Installing Anything

Audio Cutter exists for the ninety seconds a year you need to cut a song in half and cannot justify learning Audacity to do it.

Open a file. Drag two sliders. Download the bit between them. That is the entire product, and it takes about forty seconds start to finish.

What is Audio Cutter?

Trimming audio is a genuinely simple operation buried under decades of complicated software. Audacity is excellent and vastly overqualified. Your phone’s voice memo app crops but will not export where you need it. Every “free MP3 cutter” download result is a toolbar with a hostage.

Audio Cutter is the boring correct answer: a single page at mp3cut.net with a Choose File button and a waveform. It is built by 123apps, who run a whole shelf of these — a joiner, a converter, a voice recorder, a video cutter — each doing one thing and linking to the others.

The editor is plain in a way that turns out to be the feature. A waveform, two draggable handles, a play button, and controls for fade in and fade out. There are also pitch, speed and volume adjustments if you want them, and a format picker on the way out.

Two things it does that surprise people. It takes video files, so you can drop in an MP4 and walk away with just the audio, trimmed. And it has a ringtone mode: one click sets a 40-second cap and exports .m4r, which is exactly the format and length iOS insists on.

One honest caveat, since the tool does not lead with it: your file is uploaded to 123apps’ servers to be processed, not chopped up locally in your browser. That is fine for a pop song. It is not the right home for a confidential recording.

What can you do on Audio Cutter?

• Trim a track to the part you actually want. Drag the handles, preview the selection, save. No timeline, no tracks, no project file.
• Fade in and out. The difference between an edit that sounds intentional and one that sounds like a mistake, and it is two checkboxes.
• Make an iPhone ringtone. The 40-second m4r constraint is applied for you, which is the part everyone gets wrong doing this manually.
• Pull audio out of a video. Drop in the MP4, keep the sound.
• Convert on the way out. MP3, WAV, M4A, FLAC, OGG — pick at export, which quietly makes this a converter too.
• Load from cloud storage. Google Drive and Dropbox files can go in directly, useful when the audio is not on the machine you are sitting at.

Tips to get the most out of it

Always add a short fade. A hard cut mid-waveform produces an audible click. A 0.5-second fade in and fade out removes it entirely, and costs you nothing.

Zoom before you trust the handles. The sliders are coarse at full-track width. Zoom into the waveform and the cut point moves from roughly-right to exactly-right — which matters most on the first beat.

Cut the ceremony and first-dance music before the day, not on it. This is the tool’s most common real-world use: a processional edited down to the length of the actual walk, a first dance trimmed from four minutes to a survivable two and a half, an entrance clipped to start on the drop instead of the intro. Export MP3, hand it to whoever is running the sound, and keep a copy on a phone as backup. If the rest of the day still needs organising, InviteCount runs wedding planning sessions on Topmate and the first fifteen-minute call is free.

Do the ringtone transfer the modern way. The site still says iTunes. On macOS since Catalina it is Finder: plug in the phone, select it in the sidebar, drag the .m4r onto it. On Android, skip all this and drop an MP3 into the Ringtones folder.

Use the joiner for the other half of the job. If you are stitching clips rather than cutting them, Audio Joiner is the sibling tool, with crossfades between tracks.

Keep the original. Exports are re-encoded, so cutting an already-lossy MP3 loses a little more quality each round. Edit from the best copy you have, once.

If you like Audio Cutter, also try…

• CloudConvert: the heavyweight converter for when the format, not the length, is the problem.
• Squoosh: the same single-purpose spirit aimed at images, with a live before-and-after comparison.
• iLovePDF: split, merge and compress PDFs in the same “one page, one job” way.
• Webamp: once the file is trimmed, play it in a pixel-perfect Winamp in your browser.

More one-job tools live in Tools & Utilities, and the rest of the listening happens over in Music & Audio.