The free AI voice recording cleaner that also amplifies your voice
Rev Clear is an AI audio cleanup tool built for spoken word: podcasts, sermons, interviews, voice memos, lectures, Zoom and phone recordings, YouTube voice-overs and audiobook narration. A neural network isolates the voice, then Rev Clear repairs distortion, reduces echo and amplifies the voice to clear, consistent loudness — all inside your browser, with nothing uploaded.
What Rev Clear fixes
- AI voice isolationDeepFilterNet3, a published speech-enhancement neural network, runs on your device and separates the voice from noise frame by frame — including changing noise like keyboards, clatter, wind and crowd chatter.
- Echo & room reductionShrinks the reverb tail of churches, halls and empty rooms so the voice sounds closer to the mic.
- Background noise removalClassic spectral cleanup learns the fingerprint of your room noise — or a noise sample you select — and removes hiss, fans, AC and road drone.
- Distortion & clipping repairFinds waveform peaks that were chopped flat when the mic was too hot and rebuilds them with smooth curves. A “soften harsh distortion” option tames crunchy overdrive.
- Voice amplificationVoice Lift raises quiet or far-away speakers, Amplify adds extra volume, and a look-ahead limiter makes it loud without clipping.
- Hum removalAuto-detects 50 Hz or 60 Hz electrical hum and notches out the hum and its harmonics.
- Clicks, pops & crackleRemoves short impulsive clicks from old tapes, vinyl transfers and bad cables.
- Clarity & de-essingCuts muddy boxiness, adds presence so words are easy to understand, and smooths harsh “S” sounds.
- Loudness standardsNormalizes to −16 LUFS for podcasts, −14 for YouTube and Spotify, or −23 for broadcast.
- A/B compare & spectrum viewFlip between original and cleaned instantly with level matching, and see the noise disappear on the spectrogram.
- Instant preview & pause trimmingHear a 15-second preview before cleaning the whole file, and optionally shorten long pauses when you export.
How to clean up a voice recording
- Add audio — drop a file, choose several for batch processing, or record with the built-in recorder.
- Pick a preset — Podcast, Sermon / Church, Echoey Room, Heavy Noise, Phone / Voice Memo, Quiet Speaker, Distorted, Old Tape, or Gentle for music. Tap Preview 15 s to hear it first.
- Press Clean Recording and listen — use A/B to compare.
- Download as WAV or MP3, or share straight from your phone.
Who it’s for
Pastors and churches cleaning sermon recordings, podcasters, YouTubers, teachers recording lessons, journalists with field interviews, musicians cleaning vocal demos, and anyone with a voice memo that’s too noisy or too quiet to hear.
Frequently asked questions
Is Rev Clear really free and private?
Yes. All processing runs inside your browser on your own device. Your recording is never uploaded to a server.
Can it fix distorted or clipped audio?
It repairs hard clipping by detecting flattened peaks and rebuilding them, and can soften harsh distortion. Heavy distortion that changed the character of the sound can’t be fully undone by any tool, but it will be noticeably smoother.
Can it make a quiet voice louder?
Yes. Voice Lift raises quiet or distant speech toward the level of the strongest speech without lifting noise between words. Amplify and the loudness target raise the whole recording, and the limiter prevents clipping.
What background noise can it remove?
With AI voice isolation on, both steady noise (hiss, fans, AC, traffic drone, hum) and changing noise (keyboard clicks, clatter, wind gusts, crowd chatter) are removed, because the network keeps what sounds like the main voice. Background music is removed too — turn AI off for singing or music. Another person talking at the same time may be partly kept.
Is the AI private? Does it need the internet?
The AI runs inside your browser. Its model (about 12.6 MB) downloads once from this site and is stored for offline use. Your audio never leaves your device.
How fast is AI cleaning?
On a typical laptop the AI runs several times faster than real time; phones and older computers are slower. Use Preview to try settings in seconds before cleaning a long file.
Can it remove echo?
Partly. The AI already reduces room sound, and the Echo / room reduction control removes more of the reverb tail. Very strong echo can’t be removed completely by any tool.
Why does my cleaned audio sound “watery” or robotic?
That’s over-processing. Lower Noise Reduction or Noise Detection Strength, or try the Gentle preset. Leave some natural room sound for the most natural voice.
What file types are supported?
Anything your browser can decode: MP3, WAV, M4A/AAC, OGG, OPUS, WEBM, and FLAC on most browsers, plus the audio track of many MP4/MOV videos. Export as WAV (16 or 24-bit) or MP3.
How long can my recording be?
Long recordings work, limited by your device’s memory. An hour of audio is fine on most laptops; on older phones, recordings under about 30 minutes are most reliable.
Does it work on my phone?
Yes. It runs in mobile browsers and can be installed to your home screen. Once installed it also works offline.