Free online audio tools, your recordings stay local
Cut a ringtone, merge tracks with crossfades, change volume or speed, reverse a clip, edit ID3 tags or extract the audio from a video: everything runs in your browser, so voice memos and demos are never uploaded.
One tool deserves an honest note: the vocal remover uses center-channel cancellation, a classic studio trick that works well on standard stereo mixes but is not AI source separation. When it cannot isolate the vocals cleanly, it tells you, instead of pretending.
All 12 tools in this category
- Audio cutterCut a clip out of an MP3, WAV or M4A right in your browser: fade in/out, ringtone preset. No upload.
- Audio volumeBoost, reduce or normalize the loudness of an audio file in your browser. No upload.
- Audio speedSpeed up or slow down audio (0.25×–4×) while keeping the pitch. In your browser, no upload.
- Reverse audioPlay an audio file backwards in your browser. No upload.
- Vocal remover (karaoke)Reduce centred vocals to make a karaoke track, in your browser. No upload.
- Audio pitchShift the pitch of an audio file up or down by semitones while keeping its duration unchanged, in your browser. No upload.
- MP3 tag editor (ID3)Edit MP3 ID3 tags (title, artist, album, cover…) in your browser. No upload.
- Voice recorderRecord your microphone in your browser. Nothing is uploaded.
- Audio Transcribe · speech to textTurn a recording into text in your browser with a small offline Whisper model. No upload, English audio only, draft quality.
- Audio converterConvert audio to MP3, WAV or AAC directly in your browser. No upload.
- Merge audio filesConcatenate multiple audio files (MP3, WAV, M4A, OGG…) into one. Drag to reorder. No upload.
- Extract audio from MP4Extract the audio track from your MP4 videos as MP3, without server-side conversion.
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Frequently asked questions
Do my audio files get uploaded for processing?
No. The audio engine (ffmpeg compiled to WebAssembly) runs inside your browser, so your files are processed on your own device. You can check the network tab: no upload happens.
Which audio formats can I convert between?
MP3, WAV, AAC, OGG and M4A are supported across the converter, the cutter and the extract-audio tool. Tag editing covers MP3 ID3 tags including the cover art.
Can the vocal remover isolate vocals from any song?
No, and we prefer to say it clearly: it cancels the center channel, which removes vocals well on many stereo mixes but cannot match AI stem separation. Results depend on how the track was mixed.