Audio Cutter Online — Cut & Trim Audio Free with Waveform Precision
Millisecond-precise numeric controls, zoom for exact cuts, real fade in/out that prevents clicks, and a dedicated ringtone workflow. The original file on your device is never modified.
1. Add your audio file
🔒 Privacy: audio is decoded, cut, and exported entirely inside your browser — nothing is uploaded, no server, no storage, no accounts. Original files on your device are never modified.
Export options
Exports are MP3 or lossless WAV - browsers cannot encode OGG/M4A/AAC without heavyweight plugins, so those formats are not offered (explained in the guide below).
🛡 Your audio never leaves your device
Decoding, cutting, and encoding all happen inside your browser. Nothing is uploaded to any server — personal recordings, songs, and voice notes stay on your device.
- Nothing uploaded — no server, ever
- No account, no email, no watermark
- Original file never modified
- MP3 encoder caches after first export
A factual description of how this tool works — not a blanket security guarantee for your device.
Ringtone quick guide
- Add the song, play it, find the chorus
- Select about 30 seconds with the waveform
- Keep fades ON for clean start/stop
- Export MP3 - done for Android and most phones
iPhone needs .m4r ringtones - convert the MP3 afterwards (see the guide below).
Other cutter options
Prefer a simpler slider cutter?
Free Audio Cutter (Simple Trim) →Cutting audio from a video?
See our free file tools →How to Cut Audio Online (3 Steps)
The fastest way to cut a song or recording, using the waveform tool above:
- Step 1 — Add the file. Drop your MP3, WAV, M4A, OGG, or FLAC file onto the drop zone. It decodes locally and the waveform appears — you finally see the audio.
- Step 2 — Select the part you want. Drag across the waveform (works by touch on phones), or type exact start and end times and fine-tune with the nudge buttons. Press Play with Loop to hear the selection repeat until it is exactly right.
- Step 3 — Export. Keep the default fades for clean edges, pick MP3 (for sharing and ringtones) or WAV (lossless, for further editing), and press Cut & Export. Preview the result inline, then download.
How to Make a Ringtone from a Song
The classic audio-cutter job, done properly in four moves: (1) add the song and play it to find the chorus or hook — the part you want to hear every time your phone rings; (2) select roughly 30 seconds — most phones loop ringtones well at that length, and shorter hooks (10–15 seconds) often work even better; (3) keep fades on (the 1-second defaults) so the ringtone starts and stops cleanly instead of clicking mid-note; (4) export as MP3 and set it as your ringtone on Android or most phones. Honest iPhone note: iPhones require ringtones in .m4r format — convert your exported MP3 afterwards using an audio converter, or use GarageBand on the phone itself. The tool never modifies your original song file.
What Is a Waveform and How to Read It?
The waveform is a picture of loudness over time: each vertical bar shows how loud the audio is at that moment — tall peaks are loud parts (choruses, claps, shouting), valleys are quiet parts (verses, pauses, silence between words). Reading it makes cutting visual instead of guesswork: song intros look like low hills before the chorus towers; silence between a voice note's sentences shows as flat lines. Use the zoom buttons to magnify the region around your cut points — at 8x you can place a cut between two words rather than in the middle of one.
Fade In and Fade Out Explained
A hard cut in the middle of a waveform usually produces a click or pop — the speaker cone is told to jump instantly from one pressure level to another. Fades fix this by ramping the volume: fade in multiplies the first moments by an increasing factor from silence to full, and fade out does the reverse at the end. The tool's 1-second defaults suit ringtones and clips; use 0.1–0.3 seconds when you want a cut that feels immediate but still smooth; use 2–3 seconds for gentle, DJ-style endings on music. Fades are applied to the actual PCM samples at export — what you export is exactly the faded audio.
MP3 vs WAV Export — Which Should I Choose?
| Format | Best for | Size (30s clip) |
|---|---|---|
| MP3 | Ringtones, messaging apps, sharing, websites — anywhere small and universal wins | ~470 KB at 128 kbps, ~1.2 MB at 320 |
| WAV | Further editing in another app, archiving the exact cut, maximum fidelity | ~5 MB (lossless, no re-compression) |
Rule of thumb: if the cut's next stop is a phone, chat app, or upload form, use MP3 at 128–192 kbps. If it is going into an editor for more processing, use WAV so no extra loss stacks on this cut. Honest note on WAV: it is lossless for the decoded audio — browsers decode internally, so a lossy source (MP3) was already compressed before this tool ever ran.
Why No OGG or M4A Export?
Honest answer: browsers can decode almost anything but ship encoders only for a few formats — MP3 (via the LAME encoder this page loads) and WAV (written natively, no encoder needed at all). Encoding OGG or M4A in a browser requires shipping multi-megabyte codec libraries for a marginal benefit. MP3 and WAV together cover the real jobs: MP3 plays everywhere and satisfies every app and portal; WAV is the lossless editing master. If you need OGG or M4A specifically, export WAV or MP3 here first and run it through the site's audio converter for the final format.
Cutting Voice Recordings and Podcasts
For spoken audio, the waveform's flat valleys are your guide: they mark the silences where you can cut without clipping a word. Trim dead air at the start, long pauses between topics, and mistakes at the end — the nudge buttons (-0.1s / +0.1s / -0.01s) place the cut in the silence rather than on a syllable. Zoom to 4x or 8x around the cut point for the last word of precision, preview on loop, then export. For podcasts, cutting the intro and outro with 0.3-second fades keeps transitions natural.
Supported Formats
Decoding (input) is handled by your browser's own audio engine: MP3, WAV, M4A/AAC, OGG, FLAC, and WebM audio all decode in modern browsers — support varies slightly by browser and version, so an exotic file may decode on Chrome but not an older browser (the tool reports failures honestly rather than guessing). Export is MP3 (128/192/320 kbps via the LAME encoder) or lossless WAV. Files up to 300 MB are accepted; decoded audio is memory-hungry, so very long recordings (hours) are better split before cutting on phones.
Why Use This Audio Cutter?
🌊 Real waveform selection
See the audio, drag the selection, watch the highlight follow your finger or mouse — visual cutting, not blind sliders.
⏱ Millisecond precision
Numeric inputs, six nudge buttons per edge, and 8x zoom — frame-accurate cuts on any device.
🎚 Real fades, real loop
Linear amplitude ramps applied to the actual samples, and an honest A-B loop of exactly what you will export.
💾 MP3 + lossless WAV
Share-ready MP3 at your bitrate, or a natively encoded lossless WAV — verified signatures on both.
🔒 Nothing uploaded
All processing runs in your browser — songs, voice notes, and recordings never touch a server.
🆓 Free and clean
No signup, no watermark, no daily caps — and honest format limits stated openly.
Popular Use Cases
Ringtones and caller tunes
Cut the hook with fades — the classic job, done with precision.
WhatsApp status audio
Short, punchy clips sized right for status and story sharing.
Lecture and interview trims
Remove dead air and tangents; keep only what you will actually re-listen to.
Podcast intros and outros
Cut theme music and stingers to exact lengths with clean edges.
Sound clips for games and chats
Slice the exact moment from a longer recording for soundboards.
Music practice loops
Cut a difficult passage and loop it during practice sessions.
Pro Tips
- Zoom to 8x before finalizing cut points. What looks aligned at 1x is often a few hundredths of a second off — the difference between cutting a word cleanly and clipping it.
- Always preview on loop before exporting. Ten seconds of looping catches rough edges that a single play-through misses.
- Keep fades on for ringtones. A ringtone that clicks every time it loops gets old fast.
- Use WAV if the clip is going into another editor. Avoid stacking a second lossy generation on your cut.
- Use 128 kbps for speech clips. Smaller WhatsApp sends with no audible difference for voice.
- Export, listen to the result card preview, then cut again if needed. The selection is preserved — iteration is instant.
Common Mistakes to Avoid
- Exporting 320 kbps voice clips. Wasted size — 128 kbps is transparent for speech.
- Cutting without previewing the loop. The loop is the honest preview of the export — use it.
- Making near-zero selections. The 0.05-second minimum exists because shorter cuts are unusable; widen the selection instead.
- Expecting the original file to change. It never does — outputs are new files; keep the original as your master.
- Forgetting that iPhone ringtones need .m4r. Export MP3 here, convert afterwards — the guide above covers it.
Audio Cutter Online — FAQ
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Use Tool🔒 Privacy: audio is decoded, cut, and exported entirely in your browser — nothing is uploaded, stored, or shared; the original file is never modified. ⚠️ Exports are MP3 (lossy, bitrate-selectable) or lossless WAV — browsers cannot encode OGG/M4A without heavyweight plugins. iPhone ringtones require .m4r conversion afterwards. The 300 MB size limit exists for browser memory and is stated plainly.
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