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Audio Editor

To cut unwanted parts of audio, drag on the waveform to select a range and press “Remove selected ranges”. To join clips, use “Join and edit” to set the order and any silence between them. You can save as WAV or MP3, or as M4A or Opus where your browser can write them. Your file is never uploaded.

On-device・No uploadMobile friendlyWorks offline

Your files and input are processed only inside your browser on this device and are never uploaded to our servers.

Drop recordings or audio (several is fine)

or

Choose audio or video (M4A, WAV, MP3, MP4 and so on; whatever this browser can read). With two or more files you choose the order to join them. Length limits depend on the device: 20 minutes on a PC, 5 minutes on a phone.Accepts: MP4 / M4V / MOV / WEBM / MKV / M4A / AAC / WAV / OGG / OPUS / FLAC / MP3Paste (Ctrl+V) also works

How to use

  1. meeting1.mp30:00 to 12:30
    meeting2.mp30:00 to 8:10

    Add audio (two or more is fine)

  2. meeting1.mp3part removed

    Select a range and delete it

  3. meeting.m4aadjust gaps of silence

    Join in order and save

Cut unwanted parts of audio, join several files if needed, and save

  1. Drop an audio file, or click “Choose file”. With two or more files, you choose the order to join them.

  2. Drag on the waveform to select a range and press “Add range”. You can also type the times.

  3. Press “Remove selected ranges” or “Keep only selected ranges”. For silence, press “Find silence”, check the list, then remove it.

  4. Add fades if you want, play the result, and press “Save” when it sounds right.

What it does

Select ranges on the waveform

Zoom and scroll the waveform to select ranges to the second. You can also type the times.

Remove several parts at once

Remove or keep several separate ranges in one step. Undo is supported.

Find and remove silence

Set a threshold in dB and the shortest silence to list the silent parts. Nothing is removed until you confirm.

Join with crossfades

Put several clips in order and join them. Choose the silence between clips or a crossfade at the joins.

Edited on your device

Nothing is sent anywhere. Reading and writing run in a Web Worker, and can be stopped part way.

Use cases

  • Cut unwanted parts from the start and end of a recording
  • Remove the pauses from a meeting or interview recording to make it easier to listen to
  • Join two recordings one after the other, with silence or a crossfade between them
  • Add fades at the start and end so the sound does not start or stop abruptly

Supported formats

Input

Audio: M4A, AAC, WAV, MP3, OGG, Opus, FLAC and so on (what the browser can read)Several files can be joined in order

Output

WAV (16-bit PCM)MP3 (written with LAME)M4A, Opus (OGG), WebM and FLAC (only the ones this browser can write are offered)

Capability matrix

FeatureSupportNotes
Select ranges and remove or keep them (several at once)Supported—
UndoSupportedUp to 30 steps of history
Find and remove silenceSupportedYou check the list before anything is removed
Join several audio files (order, silence between, crossfade)SupportedThe sample rate and channel count follow the first file
Fade in and fade outSupported—
Saving as M4A, Opus, WebM or FLACPartialOnly the formats this browser can write are offered
Saving as MP3SupportedLAME (an open-source MP3 encoder) runs in your browser. About 0.3 MB is loaded the first time you choose MP3
Multitrack editing (layering several sounds)Not supported—
Effects (reverb, equaliser and so on)Not supported—
Editing the picture of a videoNot supportedOnly the audio is handled; no picture is kept
DRM-protected (encrypted) audioNot supportedCannot be read

Limits & notes

  • One edit is up to 20 minutes on a PC, and 5 minutes on a phone. For joined clips, the total counts.
  • Up to 2 GB per file on a PC, and 300 MB on a phone.
  • The whole audio is held in memory while editing, so split a long recording before you open it.
  • Silence is a run of 10-millisecond windows whose peak is below the threshold.
  • Up to 30 steps can be undone.

Privacy & safety

Reading, editing and saving all happen in your browser. Audio is never sent to a server.

FAQ

How do I cut only the unwanted start and end of a recording?
Drag on the waveform to select a range, press “Add range”, then press “Remove selected ranges”. You can also type the times.
Can silence be removed automatically?
Yes. Set the threshold and the shortest silence, press “Find silence”, and the silent parts are listed and marked on the waveform. Press “Remove silence” after checking, and a little padding is kept at each side. Nothing is removed automatically.
Can I join two audio files?
Choose two or more files and you get a screen to set the order. Set the silence between clips or a crossfade, then press “Join and edit”.
Can I save as MP3?
Yes. Choose MP3 as the format to save; you can choose the bitrate too. WAV (16-bit), and M4A, Opus, WebM or FLAC where your browser can write them, are also offered.
Is my audio uploaded?
No. Editing runs entirely in your browser, and the audio is not sent to a server.
Can I undo a mistake?
Yes. Up to 30 steps can be undone.

Audio Converter and Video Audio Extractor

To get just the sound from a video, choose the video and an output format (MP3, M4A, WAV, Opus or FLAC). If the source audio is AAC, M4A is written without re-encoding, so the quality does not change. Your file is never uploaded.

No upload

Volume Normalization and LUFS

When sound is quiet, or the volume differs from file to file, set it to a target in LUFS. -14 suits YouTube and Spotify, -16 Apple Podcasts, and -23 broadcast. The tool measures first, then changes only the gain, and keeps the true peak under -1 dBTP. Your file is never uploaded.

No upload

Audio Noise Removal

To reduce background noise in a recording or meeting, choose the audio or video, set the strength and click “Remove noise”. Compare the result with the original, then save it as 16-bit WAV. Your file is never uploaded.

No upload

Music Tag Studio

Edit and save the tags of MP3 and FLAC files in one table. Title, artist, album, track number, year, genre, lyrics and album art are supported, and garbled Shift_JIS tags common in old Japanese MP3s can be re-read and saved as UTF-8 / UTF-16. Audio data is not changed by a single byte, and everything stays on your device.

No upload

Screen Recorder

Record a screen, window or tab, your webcam and microphone without installing anything. Add a camera overlay or mix mic and tab audio. Recordings stay inside this device and are never uploaded.

No upload

Video Converter, Rotate and Crop

To change only the container, the picture and sound are copied as they are, so the quality stays the same and it is quick. MP4 and MOV can store the rotation without changing the picture. To make a wide video vertical (9:16), fit it with a blurred background or black bars. Your file is never uploaded.

No upload

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