# MP3 Cutter (mp3cutter.win) > Free online audio cutter that runs 100% in the browser. Cut, trim, remove sections, fade in/out, change volume and speed, and export MP3 (128–320 kbps) or WAV. Files are never uploaded. No sign-up, no watermark, works on iPhone, Android, Windows, macOS and Chromebook. Key facts: - Processing: local, in-browser (Web Audio API + OfflineAudioContext; MP3 encoding via LAME in a Web Worker). No server upload. - Input formats: MP3, WAV, M4A/AAC, OGG, Opus, FLAC, WebM, AIFF (anything the browser can decode). - Output formats: MP3 CBR 128/192/256/320 kbps, 16-bit PCM WAV. - Editing: sample-accurate cut, keep or remove selection, fade in/out 0–10 s, volume 0–300 %, speed 0.5×–2×. - Price: free. Supported by ads. ## Tools - [MP3 Cutter](https://mp3cutter.win/): To cut an MP3 online for free, open MP3 Cutter, drop your audio file, drag the two handles on the waveform to the part you want, optionally add a fade in or fade out, then click “Cut & export”. The trimmed MP3 is created in your browser in seconds — nothing is uploaded. - [Ringtone Maker](https://mp3cutter.win/ringtone-maker/): To make a ringtone from a song, open the Ringtone Maker, load the song, drag the 30-second selection to the chorus or hook, keep the default 1-second fade in and 2-second fade out, and export as MP3. Android can use the MP3 directly; on iPhone import it with GarageBand or the Finder. - [Audio Trimmer](https://mp3cutter.win/audio-trimmer/): An audio trimmer removes unwanted audio from the beginning or end of a recording. Load the file, drag the left handle past the silence at the start and the right handle before the end you want to drop, preview, then export. Use the ±0.1 s buttons for precise trims. - [Remove Part of Audio](https://mp3cutter.win/remove-part-of-audio/): To remove a part of an audio file, load it, select the unwanted section on the waveform, make sure “Remove selection” is active, and click Preview to hear the joined result. When it sounds right, export as MP3 or WAV. The audio before and after the selection is merged into one file. - [Fade In / Out](https://mp3cutter.win/fade-in-fade-out/): To add a fade to audio online, open the file, select the part you want to keep (or the whole track), set the Fade in and Fade out sliders between 0 and 10 seconds, press Preview result to hear it, then export. Typical values are 1–2 s for fade in and 3–5 s for fade out. - [WAV Cutter](https://mp3cutter.win/wav-cutter/): To cut a WAV file without quality loss, load it into the WAV Cutter, select the region, choose WAV as the output format and export. The audio is copied sample-for-sample into a new 16-bit PCM WAV file. Choose MP3 instead if you need a smaller file. - [M4A Cutter](https://mp3cutter.win/m4a-cutter/): To cut an M4A file online, open it in the M4A Cutter (iPhone voice memos work directly from the Files app), drag the handles around the section you want, and export as MP3 or WAV. The M4A is decoded by your browser, so nothing is uploaded and it also converts M4A to MP3 in the same step. - [Volume Booster](https://mp3cutter.win/volume-booster/): To boost the volume of an audio file online for free, open the Volume Booster, drop your file, drag the Volume slider up to 150%–300%, press Preview to verify loudness without clipping, then export as MP3 or WAV. Processing happens inside your browser without uploading. - [Speed Changer](https://mp3cutter.win/audio-speed-changer/): To change audio speed online, load your track into the Audio Speed Changer, adjust the Speed slider between 0.50× (half speed) and 2.00× (double speed), preview the result in real time, and export the adjusted MP3 or WAV. No uploads, watermarks, or account needed. - [MP3 Converter](https://mp3cutter.win/mp3-converter/): To convert audio to MP3 online for free, open the MP3 Converter, choose your file (WAV, M4A, AAC, FLAC, or OGG), select your preferred bitrate (128 kbps, 192 kbps, or 320 kbps), and click “Cut & export MP3”. The conversion runs in your browser and completes in seconds. ## Guides - [How to Make a Ringtone for iPhone from Any Song (2026, Free)](https://mp3cutter.win/guides/how-to-make-iphone-ringtone/): Cut the song to 30 seconds or less with a free online ringtone maker, save it to the Files app, then open GarageBand on the iPhone, import the clip, and use Share → Ringtone. The whole process takes about three minutes and needs no computer. - [How to Set Any Song as Your Android Ringtone (Samsung, Pixel, Xiaomi)](https://mp3cutter.win/guides/how-to-set-custom-ringtone-android/): Cut your song to about 30 seconds with an online ringtone maker, download the MP3, then go to Settings → Sound → Ringtone, tap “+” or “Add from device”, and choose the file. Android accepts MP3 ringtones directly — no conversion needed. - [MP3 Bitrate Explained: 128 vs 192 vs 320 kbps — Which Should You Use?](https://mp3cutter.win/guides/mp3-bitrate-explained/): Bitrate is how many kilobits of data store one second of audio. 128 kbps is fine for speech and ringtones, 192 kbps is transparent for most music listeners, and 320 kbps is the maximum MP3 quality. Each minute of stereo audio is about 0.94 MB at 128 kbps, 1.4 MB at 192 kbps and 2.4 MB at 320 kbps. - [How to Cut Audio for TikTok, Instagram Reels & YouTube Shorts](https://mp3cutter.win/guides/how-to-cut-audio-for-tiktok-reels/): Load the track into an online audio cutter, place the playhead at the hook, click “15 s from playhead” (or drag a 30–60 s selection), add a 0.5 s fade in and a 1–2 s fade out, and export MP3. Then import the clip as original audio in the TikTok, Instagram or YouTube editor. ## Optional - [About](https://mp3cutter.win/about/) - [Privacy Policy](https://mp3cutter.win/privacy/)