Audio tools
Trim the part you need, join several recordings, shrink a file until it's small enough to send, or lift the audio out of a video. All of it runs in the browser fast, private, and free.
Files are processed on your own device nothing is uploaded to a server.
- Convert to MP3Turn WAV, M4A, or OGG into MP3 that plays anywhere.
- Convert to WAVTurn MP3 or M4A into uncompressed WAV.
- Convert audioMove to MP3 or WAV, and set bitrate, sample rate, and mono or stereo.
- Compress audioShrink a file at the bitrate you pick, or chase a target such as 5 MB.
- Extract audio from videoPull the sound track out of an MP4, MOV, or WebM without an editing app.
- Trim audioDrag two handles across the waveform to keep exactly the part you want.
- Split audioDivide one long file into equal-length pieces, delivered as a zip.
- Merge audioJoin several files into one, with full control over the order.
- Adjust volumeRaise or lower loudness in decibels, without clipping the peaks.
- NormalizeEven out loudness across files handy when assembling a podcast or a compilation.
- Fade in & outSmooth the start and the ending so nothing begins or stops abruptly.
- Trim silenceCut the quiet stretches at the start and end of a recording, with an adjustable threshold.
- Voice recorderRecord straight from your microphone, then save it as MP3 or WAV.
- Audio infoSee the duration, sample rate, channel count, and estimated bitrate of your file.
Still about media files
Questions that come up often
What people most often ask before handing over a file privacy, size limits, and when quality actually drops.
Do my recordings get uploaded?
They don't. Sound files often hold things that were never meant for other ears a meeting that hasn't been decided yet, private notes, an interview before it runs. Everything is handled inside the tab you already have open using the browser's own Web Audio API, and even the MP3 encoder loads onto your device rather than receiving your audio on someone else's machine. Recording permission is requested only on the recorder page, and the result stays on your device until you download it yourself.
Why is the WAV file so much bigger?
Because WAV stores the waveform exactly as it is, uncompressed roughly 10 MB per minute for 44.1 kHz stereo. MP3 discards what the ear can barely hear, which brings it down to about 1 MB per minute. Choose WAV if the result will be edited further, MP3 if it's just going to be sent or played.
Does quality drop with every conversion?
For MP3, yes. MP3 is a lossy format, so converting MP3 to MP3 again throws detail away twice not instantly terrible, but don't repeat it many times. If the source is WAV, FLAC, or a raw recording, a single conversion to MP3 gives the best result. WAV itself never loses detail.
Which bitrate should I use?
128 kbps is plenty for speech such as a podcast or a meeting recording. For music, 192 kbps feels safe and 320 kbps is practically indistinguishable from the original to most listeners. Pushing the bitrate above the source's own quality adds nothing it only makes the file bigger.
Is there a limit on recording length?
None from us, because there's no server receiving anything. The limit comes from device memory: audio is opened uncompressed, so ten minutes of stereo takes up roughly 200 MB of RAM. Hours-long recordings are better split up first.
Why can't my video file be read?
Pulling audio out of a video depends on the decoders your browser and system happen to have, and that isn't uniform. MP4 and WebM are usually safe in Chrome and Safari; Firefox and rarer formats like MKV or AVI often fail. If it fails, convert the video to MP4 first with a video player you already have.