MP3 Cutter: Trim Audio and Cut Songs in Your Browser
Cut MP3, WAV, and M4A files with a visual waveform. Drag the handles to find the exact second, apply fades, preview the result, and download instantly. Your audio never leaves your device.
- No upload
- Visual waveform
- Fade in/out
- Export MP3 or WAV
Drop an audio file here
MP3, WAV, M4A, AAC. Up to 100 MB. Decoded locally in your browser.
How do I cut an MP3 file online for free?
Drag your audio file into the tool above. Use the visual waveform to drag the start and end handles, finding the exact part you want. You can also apply fades to smooth the cut. Preview the audio, then click Download to save it as MP3 or WAV.
- Price
- Free, no account, no watermark
- Upload required?
- No, the audio is processed entirely in your browser
- Input formats
- MP3, WAV, M4A, AAC, OGG, FLAC
- Output format
- MP3 (128kbps) or WAV (Uncompressed)
- Features
- Visual waveform drag, fades, live playhead, MP3 encoding
- Privacy
- 100% private. Your audio files never leave your device
- Max file size
- No hard limit, but files under 100 MB perform best
- Works on
- Chrome, Edge, Firefox, Safari, iPhone, Android, Windows, Mac
How to cut audio in 3 steps
- 1
Upload your audio file
Drag and drop an MP3, WAV, or M4A file into the tool. The audio is decoded directly in your browser, so nothing is sent to a server.
- 2
Adjust trim & fades
Use the visual waveform to drag the start and end handles. Apply professional fade-in and fade-out effects to avoid sudden clicks.
- 3
Preview & Download
Preview the trimmed segment to make sure it sounds perfect. Download instantly as a high-quality MP3 or uncompressed WAV file.
What can you do with the audio trimmer?
From making custom ringtones to editing podcasts, this tool gives you quick control over your audio files.
| Use case | What you can do | Output |
|---|---|---|
| Ringtone Creation | Cut a 30-second snippet and apply a fade out | Export as MP3 for iPhone/Android |
| Podcast Editing | Remove dead air or cut a short teaser trailer | Trim start/end with zero quality loss |
| Music Production | Extract a specific drum break or vocal sample | Millisecond-accurate slicing |
| Sound Effects | Trim sound effect libraries to the exact hit | Apply fade to avoid popping sounds |
| Reels & TikTok | Cut audio to match a 15 or 30-second short video | Quick visual cutting |
| Language Learning | Slice specific sentences from an audio lesson | Loop and repeat sections |
Audio trimming not working? Try these fixes
The audio file does not load
The browser needs to support decoding the format. MP3, WAV, and M4A work everywhere. If FLAC or OGG fails, convert it to MP3 first using our Audio Converter.
The MP3 export takes a long time
MP3 encoding happens locally on your CPU. For a 1-hour podcast, it might take 10-20 seconds. Keep the tab open until the download starts.
The cut sounds abrupt
Use the Fade In and Fade Out controls in the tool. Adding a 0.5-second fade prevents the harsh "click" sound at the cut point.
The timestamp inputs are hard to use
You can drag the handles on the waveform with your mouse or finger. For exact numbers, click the timestamp boxes and type directly.
Mobile browser crashes
Phones have less RAM. If you are editing a 2-hour file, do it on a laptop. For a standard 3-minute song, mobile works perfectly.
It says "Could not decode"
The file might be corrupted or using a non-standard codec (like DRM-protected M4P files). Try playing the file in VLC to check if it is valid.
ToolDeck vs typical online MP3 cutters
Most online cutters upload your audio to a server and re-compress it, causing quality loss. ToolDeck decodes and encodes audio locally in your browser.
| Feature | TToolDeck | Upload-based tools |
|---|---|---|
| Free with no account | Yes | Free tier, account often required |
| No file upload to a server | Yes | No |
| True visual drag selection | Yes | Often just number inputs |
| Fade In / Fade Out controls | Yes | Varies |
| Export as MP3 directly | Yes | Often forces WAV or re-compresses badly |
| Watermark or limits | No | Often limits to 60s or adds ads |
| Works offline after page load | Yes | No |
| Mobile friendly UI | Yes | Varies |
Competitor features vary by provider and plan. Based on commonly available behaviour; verify each tool before relying on it for professional work.
What you get for free
True Visual Waveform
See the actual peaks and valleys of your audio. Drag the handles directly on the graph to cut exactly where you want.
Fade In & Fade Out
Apply professional fades to your audio clips with one click. This eliminates harsh clicks and pops at the start and end of your cut.
Native MP3 Export
Unlike other tools that force you to download massive WAV files, we encode directly to MP3 (128kbps) right inside your browser.
Millisecond Precision
Use the drag handles for quick cuts, or type the exact timestamp (HH:MM:SS.ms) if you need frame-accurate trimming.
100% Private
Your audio files are decoded and re-encoded using WebAssembly inside your browser. Nothing is uploaded, making it safe for private voice notes.
Live Playhead
Press play to hear exactly what the trimmed file will sound like. A live playhead moves across the waveform so you never lose your place.
Tips for perfect audio cuts
Use fades for smooth cuts
Cutting directly through a sound wave causes a pop. Always apply a 0.5s fade in or out for a professional, seamless transition.
Keep the original file
This tool cuts a copy of the audio. Always keep your original file so you can make different edits later without losing quality.
MP3 vs WAV
MP3 is compressed and great for sharing. WAV is uncompressed and perfect for video editing. Choose based on what you plan to do next.
Use headphones
When making precise cuts for music or podcasts, headphones will help you hear the exact transient and avoid cutting off the start of a word or beat.
MP3 Cutter FAQ
Quick answers about privacy, quality loss, formats, and mobile support.
How do I cut an MP3 file online for free?
Open this page, drag your MP3 file into the tool, and use the waveform handles to select the section you want to keep. Press Download to save the trimmed file. It is free, needs no account, and happens entirely in your browser.
Is my audio file uploaded to a server?
No. The audio is decoded and encoded using Web Audio API and lamejs inside your browser. Your files are never uploaded to ToolDeck or any third-party server.
Does cutting an MP3 reduce its quality?
If you export as WAV, there is zero quality loss. If you export as MP3 (128kbps), there is a very slight re-compression, but it is virtually unnoticeable for ringtones and social media clips.
Can I cut a specific part of a song to make a ringtone?
Yes. Upload the song, find the chorus, and trim it down to 30 seconds. Apply a quick Fade Out, then export as MP3. You can set this file as your custom ringtone.
What audio formats are supported?
The tool supports MP3, WAV, M4A, AAC, and OGG. Support depends on your browser, but MP3 and WAV work on all modern browsers (Chrome, Safari, Firefox, Edge).
Will the timestamps stay accurate?
Yes. The Web Audio API decodes the file with high precision. When you export, the trimmed file will start exactly at 0:00 and end at your chosen duration.
What does the "Fade" feature do?
It gradually increases (fade in) or decreases (fade out) the volume at the start or end of your selection. This prevents the harsh clicking sound that happens when audio is cut abruptly.
Does it work on iPhone and Android?
Yes. The tool is fully responsive and works in Safari on iOS and Chrome on Android. The waveform adapts to mobile screens for easy touch dragging.
Why does the MP3 export take a few seconds?
The browser has to compress the raw audio into MP3 format using WebAssembly (lamejs). For a 3-minute song, this takes 1-2 seconds. For long podcasts, it might take longer.
Does it work offline?
Yes. Once the page has loaded, the audio processing and exporting run locally. You do not need an internet connection to trim your files.
Can I use this to extract audio from a video?
No, this tool is for audio files only. If you want to extract audio from an MP4 video, use our Video to MP3 tool first.
What if the waveform does not show up?
Ensure the audio file is not corrupted. If it is a supported format and still fails, try refreshing the page. Very large files may take a few seconds to draw the waveform.
Does it remove vocals or instruments?
No. This is a cutting tool. If you want to remove vocals, use our Audio Stem Separator tool.
Is there a limit on how many files I can trim?
No. You can trim as many files as you want. The tool processes one file at a time, but you can repeat the process infinitely for free.
Will the ID3 tags (artist, album) be preserved?
No. Because the exported file is generated fresh from the audio data, ID3 metadata tags are not included. You can add tags later using an MP3 tag editor.
Is this tool safe for confidential voice recordings?
Yes. Because no data is uploaded, it is perfectly safe for confidential interviews, legal recordings, and private voice notes.
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Your audio stays on your device
There is no upload step and no account. Audio files are decoded and re-encoded using Web Audio API and WebAssembly entirely inside your browser. Your recordings never leave your device. Read how we keep it private.