Audio Compressor

• Bitrate control with a real tradeoff

  File size is roughly bitrate times duration, so the bitrate setting is the whole game. Drop a 320 kbps MP3 to 128 kbps and the file shrinks by about 60 percent; clean speech stays perfectly clear down around 64 kbps at a quarter of the size. You pick the number, so you decide how much quality to trade.

• An audio compressor inside a full editor

  Single-purpose compressors re-encode your file and nothing else. EchoWave is a complete audio editor, so you can trim the intro, cut a flubbed take, merge two recordings or change speed (0.25x to 4x) before you re-encode. Shorter audio compresses to a smaller file, every time.

• Convert while you compress

  WAV runs about 10 MB per minute, so the biggest single saving is usually a format change. Upload a WAV or M4A and export it as MP3 in one pass, or use the audio converter when you only need a format swap without any editing.

• Compress audio straight from a video

  Upload an MP4, MOV, WebM or AVI and export only its soundtrack as a compact MP3. It is the quickest way to extract audio from video for a podcast feed or a transcript. If you need the picture too, the video compressor shrinks the whole file instead.

• Remove silence before re-encoding

  Dead air costs the same bitrate as speech. EchoWave's transcript view can cut silences and filler words like ums and uhs automatically, so a rambling recording loses minutes of nothing before compression even starts.

• Hear it before you commit

  Play your file in the browser, scrub the timeline and check every cut point before rendering anything. You can rework the edit as many times as you like, and a free HD MP4 export with a small EchoWave watermark badge lets you check the finished result on any device.

• Cloud rendering on any device

  Files render on EchoWave's cloud render farm, not your machine, so a ten-year-old laptop or a Chromebook handles a long recording as well as a new desktop. Nothing to install; it runs in Chrome, Edge, Firefox and Safari.

• Do more with the compressed file

  Because the compressor lives inside a video editor, the same project can become an audiogram with one of 93 music visualizer styles, or pick up AI captions from 176 presets for a clip you post alongside the audio.

1. 1

   Upload your audio

   Drag an MP3, WAV or M4A into the editor, or upload a video (MP4, MOV, WebM, AVI) to compress just its audio track. Everything runs in the browser, so there is nothing to install first.

2. 2

   Trim what you don't need

   Cut silence, long pauses and false starts on the timeline, or use the transcript view to remove filler words automatically. A shorter file is a smaller file at any bitrate.

3. 3

   Choose format and bitrate

   Pick MP3 or M4A as the export format, then set the bitrate. Use 128 kbps for music you are sharing casually and 64 kbps for plain speech; both cut the size hard while staying listenable.

4. 4

   Render and download

   EchoWave renders the file on its cloud render farm and hands you the download. You can export the result as an HD MP4 free, with a small removable EchoWave watermark badge and a short branded end card. Audio-only MP3 and M4A exports come with the Basic plan; WAV and FLAC are available on Pro.

• Podcast episodes

  Hosting platforms meter storage and listeners meter their data plans. Re-encoding a stereo episode as 96 kbps mono can cut around three quarters of the size with no audible change for spoken word.

• Email attachments

  Gmail caps attachments at 25 MB and Outlook at 20 MB, which raw WAV blows past within a few minutes of audio. At 128 kbps, roughly 26 minutes of MP3 fits under the Gmail cap.

• Discord and chat apps

  Discord limits free uploads to 10 MB, so voice clips and session recordings often bounce. A 64 kbps mono MP3 fits about 20 minutes of speech inside that limit.

• Transcription uploads

  Transcription services upload faster with smaller files, and some cap file size outright. Speech stays fully legible to a transcription model at low bitrates, so compress first and skip the wait.

• Demos and rough mixes

  Send a bounce to bandmates without a file transfer service. Keep your lossless master and share a 192 kbps MP3, which most listeners cannot tell apart from the original.

• Web and app audio

  Background loops, notification sounds and sample previews should load fast. Smaller audio files mean quicker page loads and lower bandwidth bills.

Based on each tool's public pages as of July 2026. Features and limits change, so check the source before you rely on a row.