Audio Converter Free — Trim & Convert Audio Online
A voice memo that is too long, a song clip that needs only its chorus, or an MP3 that an old editor refuses to open — small audio jobs like these should not need a heavy program or an upload to a stranger’s server. This free audio converter handles them in your browser. Upload a WAV, MP3, M4A or OGG file, pick a start and end time to trim it, and download the result as a WAV file that opens in almost any audio editor or player. Exports WAV only; files under 50 MB; conversion runs on your device and can take a minute for long audio. Your recording never leaves your browser, there is no account and no watermark, and the trimmed clip belongs to you. This tool does not encode MP3 files and does not convert video to audio, and saying so plainly matters: a WAV export is honest, reliable and works everywhere, while promising MP3 encoding in a browser would need a large encoder and far more time.
WAV, MP3, M4A or OGG, under 50 MB. Exports WAV only.
No audio file selected yet.
Leave the end at 0 to keep the file to its end.
Status: waiting for a file.
Privacy: your audio never leaves your browser. Conversion runs entirely on your device.
How to Use
- Upload your audio file. Click the drop zone and choose a WAV, MP3, M4A or OGG file under 50 MB, or drag the file into the box. The file name, size and length appear below the box once it has been read.
- Set the trim times. Enter the start time in seconds where the clip should begin, and the end time where it should stop. Leave the end at 0 to keep everything to the end of the file. The end must be later than the start.
- Click Convert to WAV. The tool decodes your audio in the browser, keeps only the chosen seconds, and encodes the result as a WAV file. Long audio can take a minute — the status text and progress bar show what is happening.
- Download the WAV. When the result appears, check the new length and size, then click Download WAV. The file opens in almost any audio player or editor, on any device.
Worked Example
Take a 60-second WAV recording of a voice memo, saved at CD quality — 44,100 samples per second, 16-bit, stereo — which is about 10.6 MB on disk. Upload it here, set the trim start to 10 seconds and the trim end to 20 seconds, then click Convert to WAV. The tool decodes the full minute, keeps only the 10 seconds between the two marks, and encodes a new WAV file. The result is a 10-second WAV, roughly one sixth of the original, so about 1.76 MB: 10 seconds times 44,100 samples times 2 bytes per sample times 2 channels equals 1,764,000 bytes of sound, plus a small 44-byte WAV header. The same maths works for any trim: a 30-second slice of that recording is about 5.3 MB, and a 5-second slice is about 0.88 MB. If you upload an MP3 instead, the same steps apply — the MP3 is decoded first, then the chosen part is saved as a WAV, so the output is always a WAV file whatever you put in.
Why Convert Audio in Your Browser?
Voice memos, interviews and music clips are personal, and uploading them to a remote converter means trusting a server you cannot see with a recording you may not want shared. This tool keeps the whole job on your device: the browser decodes the file, trims it and writes the WAV, and nothing is sent over the internet at all. It is also free and unlimited for small files, with no account and no watermark. The honest trade-off is speed and size. Decoding and encoding in a browser is slower than on a dedicated server, so a long recording can take a minute, and WAV files are larger than MP3 files because they are uncompressed. For short clips, ringtones, podcast intros and editor-ready audio, that trade is worth making.
Tips for a Clean Audio Clip
Listen to the original first and write down the exact seconds where the part you want starts and ends, because trimming by ear is far easier than guessing. Leave a fraction of a second of breathing room at the start and end of a spoken clip, so the first word is not cut off. Remember the 50 MB limit: a long uncompressed WAV can pass it quickly, so trim a long recording in a desktop editor first if needed. Use the WAV output for editing, because it loses nothing in quality, and convert to a smaller format in your editor afterwards if you need a small file for sharing. Finally, keep the original file until you have played the trimmed WAV all the way through, so you can redo the trim if the cut landed in the wrong place.
Frequently Asked Questions
Is the audio converter really free?
Yes. Trimming and converting audio to WAV on this page is completely free, with no account, no sign-up and no watermark. You can convert as many small files as you like.
Are my audio files uploaded to a server?
No. Your audio never leaves your browser. Decoding, trimming and WAV encoding run entirely on your device, so your recordings are never uploaded, stored or heard by anyone else.
What formats can I export?
This tool exports WAV only. It can read WAV, MP3, M4A and OGG files and turn them into a WAV file, which opens in almost any audio editor or player. It does not encode MP3 files.
What is the largest file I can use?
Files under 50 MB are accepted. Long recordings can take a minute to decode and encode on your device, because all the work is done in your browser rather than on a server.
Can I convert a video file to audio here?
No. This tool works with audio files only and does not convert video to audio. Extract the audio from your video in a video editor first, then upload the audio file here.