What is the difference between reverb and echo?

An echo is a distinct repetition you can hear separately, like shouting across a valley, usually 100 ms or more apart. Reverb is countless dense reflections blending into a sense of space, with no individual repeats. Reverb makes dry vocals fuller — hall reverb suits singing, room reverb suits speech.

Does the voice changer change the speaking speed?

No. Chipmunk and deep voice shift pitch without changing tempo: the sample rate is changed to move the pitch, then atempo stretches the audio back to its original length, so timing stays the same. Bigger shifts sound more cartoonish.

Will the final file sound like the preview?

Yes — the preview uses exactly the same processing, just on a 10-second clip. The preview does not update automatically when you change settings; the page tells you to render it again. A / B switching keeps the playback position so you can compare line by line.

Are my files uploaded? Is it free?

Nothing is uploaded — every effect is computed locally by FFmpeg (WebAssembly) in your browser and discarded when you close the page. The tool is free, with no sign-up, watermark or usage limits.

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🎭Audio Effects & Voice Changer - Reverb, Echo, Robot

Want to add reverb to a voice-over, make narration sound like a phone call or walkie-talkie, or turn a voice into a robot or chipmunk? This tool has 17 ready-made effects. Space: hall reverb and room reverb (true convolution with a synthesized decaying-noise impulse response, far more natural than a plain echo) plus echo. Modulation: chorus, flanger, phaser, tremolo (volume wobble) and vibrato (pitch wobble). Voice: underwater, robot (phase zeroed in the frequency domain), whisper (randomized phase), chipmunk and deep voice (pitch shift without changing speed). Distortion and retro: telephone (the 300–3400 Hz voice band), walkie-talkie / radio (narrow band, overdrive and hiss), megaphone and 8-bit (reduced bit depth and sample rate). Each effect has one to three adjustable parameters. Render a 10-second preview from any point and flip between the original (A) and the effect (B) with playback kept in sync. When it sounds right, process a whole batch of files and export MP3, M4A, WAV, FLAC, OGG or OPUS; a limiter prevents clipping.

Free · No sign-up · Runs in your browserLast updated: 2026-10-26

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How to use Audio Effects & Voice Changer

1Upload one or more audio files (videos work too — only the sound is processed)
2Choose an effect, adjust its parameters and render a 10-second preview; compare with the A / B buttons
3Pick an output format, click Apply effect, then listen and download

FAQ

What is the difference between reverb and echo?: An echo is a distinct repetition you can hear separately, like shouting across a valley, usually 100 ms or more apart. Reverb is countless dense reflections blending into a sense of space, with no individual repeats. Reverb makes dry vocals fuller — hall reverb suits singing, room reverb suits speech.
Does the voice changer change the speaking speed?: No. Chipmunk and deep voice shift pitch without changing tempo: the sample rate is changed to move the pitch, then atempo stretches the audio back to its original length, so timing stays the same. Bigger shifts sound more cartoonish.
Will the final file sound like the preview?: Yes — the preview uses exactly the same processing, just on a 10-second clip. The preview does not update automatically when you change settings; the page tells you to render it again. A / B switching keeps the playback position so you can compare line by line.
Are my files uploaded? Is it free?: Nothing is uploaded — every effect is computed locally by FFmpeg (WebAssembly) in your browser and discarded when you close the page. The tool is free, with no sign-up, watermark or usage limits.