Online MP3 Editor

• Trim and cut with precision

  Drag the clip edges to trim the start and end, or split anywhere on the timeline and delete the middle. Zoom into the waveform to land cuts exactly where a word or a beat ends. If trimming is all you need, the stripped-down audio trimmer gets it done with fewer clicks.

• Join files and layer tracks

  Drop several MP3s onto the timeline and the magnetic timeline snaps them end to end with no gaps. You can also stack tracks to layer narration over music, then crossfade between songs. For plain end-to-end merges, the dedicated audio joiner is the shortest path.

• Fades and volume keyframes

  Add a fade in or fade out of any length, or set volume keyframes to duck the music under a voice and bring it back up afterwards. Keyframes sit right on the clip, so you can see the volume curve against the waveform. Every change previews instantly, so you hear the exact mix before you export anything.

• Change speed from 0.25x to 4x

  Slow a recording down to transcribe it, or run a rambling section at double speed. Speed applies per clip, so one segment can play at 1.5x while everything around it stays at normal pace. It is a small thing that saves real time on lectures, meetings and language practice.

• Record straight into the edit

  Open the built-in voice recorder and record over your track without leaving the browser tab. If you would rather type the narration than read it aloud, 63 AI text-to-speech voices can generate it for you.

• Edit spoken audio by transcript

  For interviews, podcasts and voice memos, EchoWave transcribes the audio so you can cut by deleting words from the text. Filler words like ums and uhs, and long silences, can be removed automatically across the whole file.

• The MP3 editor that exports more than MP3

  Free accounts export the finished edit as an HD MP4 with a small watermark badge. Audio-only MP3 and M4A come with the Basic plan, and WAV and FLAC with Pro. Headed for a phone or a strict upload limit? The audio compressor shrinks the finished file further.

• Turn the track into a video

  EchoWave is a video editor at heart, so a finished MP3 can become an MP4 with one of 93 waveform and spectrum visualizer styles. Add cover art, a title and captions, and you have an audiogram. That is how podcast highlights end up on Instagram, TikTok and YouTube.

1. 1

   Upload your MP3

   Drag the file into the editor or click to browse. WAV, M4A and other common audio formats work too, and you can add several files to the same project at once.

2. 2

   Cut, arrange and layer

   Trim the ends, split out the sections you do not want, and drag clips into order. Stack a second track if you want music running under a voice.

3. 3

   Shape the sound

   Add fades, set volume keyframes, change the speed of any clip, and drop in effects from the 30 built-in sound effect packs. Press play at any point to hear exactly what you will get.

4. 4

   Export and download

   Render an HD MP4 with a visualizer free; it carries a small removable EchoWave watermark badge. Paid plans remove the badge and add audio-only MP3, M4A and WAV exports.

• Podcast episodes

  Cut the pre-show chatter, tighten the pauses, and fade the intro music under your voice. Transcript editing removes ums and uhs across a whole episode in one pass.

• Ringtones and alerts

  Trim the hook of a song to 30 seconds or less and export it clean. Android takes MP3 directly, and iPhones take an M4A renamed to M4R.

• Lectures and meetings

  Slow dense sections to 0.75x for note taking, or cut an hour of audio down to the ten minutes that matter. Automatic silence removal shortens recordings without touching the content.

• Audiograms for social

  Pair your best 60 seconds with a waveform visualizer and export vertical video for Reels, TikTok or Shorts. Auto-captions transcribe the speech with word-level timing.

• Demos and mixtapes

  Join takes end to end, fade between songs, and balance levels so no track jumps out. Automatic beat detection puts a snap-to-beat grid on the timeline for tight transitions.

• Voice over tracks

  Record narration, tidy the takes, and export a clean M4A for your video project. Or keep working in the same tab, since the full video editor is already open.

Based on each tool's public pages as of July 2026. Audacity is free desktop software, mp3cut.net is part of the 123apps suite, and TwistedWave offers browser, Mac and iOS versions with different limits.