Free Audio Tools That Run in Your Browser

Yes. Every tool on this page is completely free: no hidden fees, no watermark on the output, and no daily task limits. The tools run entirely in your browser, so there is nothing to bill you for.

No. None of the Submind web tools ask for an account, an email address, or a credit card. Open a tool, drop in your file, and download the result.

No. Every tool on this page processes audio directly in your browser using your device’s own resources. Your files never leave your computer, so nothing is stored or seen by anyone.

Together the tools cover all the major audio formats: MP3, WAV, FLAC, AAC, M4A, OGG, OPUS, WMA, AIFF, and WEBM, plus video files for the Video to MP3 tool.

Upload-based tools accept files up to 2 GB per file. Live Transcription and the Voice Recorder work through your microphone, so there is no upload size to worry about with them.

Yes. Every tool runs in your mobile browser — Chrome, Safari, Firefox — on Android and iOS. Nothing to install: the tools are the same site you use on desktop.

Use the Audio Noise Remover to reduce constant background sounds such as hum, hiss, wind, and crowd noise. Use Remove Silence to cut the quiet gaps between phrases. For rough location recordings, run the noise remover first, then the silence remover.

Transcribe works on recordings you already have: upload an MP3, WAV, or M4A file and get an AI transcript in 7 languages. Live Transcription listens through your microphone and writes the text as you speak, in real time — same language set. Use Transcribe for existing recordings and Live Transcription for meetings or calls happening right now.

Open Video to MP3, add an MP4, MOV, MKV, AVI, or WEBM file, and download the audio as MP3 — the conversion runs in your browser, so the video never leaves your device. Need a different format after that? Run the result through the Audio Converter.

Yes. The Vocal Remover splits a song into instrumental and vocal parts in your browser. It works with MP3, WAV, and video files, and the instrumental downloads as its own track.

Open the Audio Converter, add the M4A file, choose MP3 as the target format, and convert — iPhone voice memos are exactly what the M4A to MP3 path is for. Bitrate and sample rate are adjustable before you download.

Converting from one lossy format to another (MP3 to AAC, for example) re-encodes the audio, which costs a little fidelity each time. Converting lossy audio to WAV does not add further loss, but it also cannot restore quality that was already lost at encoding time.

Yes. The Audio Converter lets you set the target format, bitrate, and sample rate before converting, so you balance file size against quality yourself.

It depends on the bitrate you choose. The five quality presets cover voice memos, podcast episodes, and email attachments; picking a lower bitrate shrinks files by as much as 90%.

Lossy compression always trades a little quality for size: the lower the bitrate, the smaller the file and the higher the chance of audible artifacts. Pick the preset that matches how the audio will be used rather than always reaching for the smallest.

Add your tracks and drag them into the order you want; the merged file plays them back exactly as arranged. The Audio Merger accepts MP3, WAV, FLAC, M4A, OGG, and AAC in one pass.

No. The merger takes mixed input formats — MP3, WAV, FLAC, M4A, OGG, AAC — and exports a single MP3, so you can combine files from different sources without converting them first.

Remove Silence scans the waveform for sections quieter than a threshold you set, lasting at least the minimum gap duration you choose. The quiet spans are trimmed out; everything between them is kept.

No. The silence remover is audio-only: MP3, WAV, M4A, FLAC, OGG, and AAC in, WAV out. For a side-by-side look at silence-removal tools — including video-capable ones — see our comparison page.

No. The Audio Speed Changer adjusts tempo from 0.5x to 4x while keeping the pitch unchanged, so speech stays natural and music stays in key.

Speeding up recorded lectures and podcasts to save time, slowing language-practice audio to hear pronunciation clearly, and slowing down (or looping through) a piece of music while learning it — all without pitch shift.

For WAV, FLAC, and OGG files, trimming is lossless: the audio outside your selection is removed and the rest is written back untouched. Other formats are re-encoded on export.

You set the start and end by dragging markers on a visual waveform, so you can see exactly where the cut lands before you export.

Seven: English, Spanish, French, German, Italian, Dutch, and Polish — the same language set as the other Submind transcription tools. Pick the language before you start and speak normally.

No. Like every Submind tool it runs in your browser — you only grant microphone permission when you start, and no account is needed. For saving your own recordings with transcripts, pair it with the Voice Recorder.