Audio Converter
Convert audio between almost any format right in your browser — drop in nearly any file and export WAV, MP3, FLAC, ALAC, AIFF, AAC/M4A, OGG, AC-3, or WMA, with control over bitrate, sample rate, channels, trimming, and normalization. WAV/MP3 are instant; everything else uses an on-demand engine. Nothing is uploaded.
How to Use
- Drop an audio file (or click to browse) — MP3, M4A/AAC, OGG, Opus, FLAC, WAV, or WebM all work as input.
- Choose an output format: WAV (lossless 16/24-bit) or MP3 (pick a bitrate).
- Optionally change the sample rate, force mono or stereo, trim a start/end, or normalize the volume.
- Click Convert — it decodes and re-encodes locally in your browser.
- Download the result; the original is never uploaded anywhere.
Drop an audio file or click to browse
MP3, M4A/AAC, OGG, Opus, FLAC, WAV, WebM — everything stays in your browser
How it converts
Your browser already knows how to decode a huge range of audio — MP3, M4A/AAC, OGG, Opus, FLAC, WAV, and WebM all go in through the Web Audio API and become raw PCM samples. From there this tool re-encodes those samples to your chosen output entirely on your machine: WAV for lossless (a simple, universal PCM container) or MP3 via a local encoder for a small, plays-everywhere file. Nothing is uploaded — your audio never leaves the browser tab.
Going to WAV is lossless; going to MP3 is lossy but transparent at higher bitrates. Remember that converting a lossy file to a lossless one can't recover detail that was already discarded — it only prevents further loss. When quality matters, start from the highest-quality source you have and avoid repeated lossy round-trips.
Reference
About the Audio Converter
Working on image, audio and file tasks? The Audio Converter is a free browser tool that gives you the answer in seconds. Convert audio between almost any format right in your browser — drop in nearly any file and export WAV, MP3, FLAC, ALAC, AIFF, AAC/M4A, OGG, AC-3, or WMA, with control over bitrate, sample rate, channels, trimming, and normalization. WAV/MP3 are instant; everything else uses an on-demand engine. Nothing is uploaded.
How it works
Enter a number and choose your units — the converted value shows instantly. Everything runs locally, so nothing you type leaves your device. Double-check the direction of the conversion and you are set.
Want the deeper story? The Knowledge Base explains the ideas behind the tools in more detail.
Frequently Asked Questions
Which formats can I convert?
Input: anything your browser can decode — MP3, M4A/AAC, OGG Vorbis, Opus, FLAC, WAV, and WebM audio. Output: WAV (lossless PCM, 16 or 24-bit) and MP3 (128–320 kbps). WAV is the universal lossless target; MP3 is the universal lossy one. More output formats (FLAC, OGG, Opus) can be added with a heavier engine — ask if you need them.
Is my audio uploaded to a server?
No. Decoding and encoding happen entirely in your browser with the Web Audio API and a local MP3 encoder. Your file never leaves your device — fine for private recordings, voice memos, or unreleased music.
Will converting lose quality?
Converting to WAV is lossless — it's raw PCM. Converting to MP3 is lossy, but at 192–320 kbps it's transparent for most ears. Converting a lossy file (like an MP3) to WAV doesn't restore quality that was already thrown away — it just stops further loss. Re-encoding lossy→lossy (MP3→MP3) always loses a little, so go lossless when you can.
What do sample rate and bit depth do?
Sample rate (44,100 Hz is CD quality, 48,000 Hz is video standard) is how many samples per second; bit depth (16 or 24) is the resolution of each sample. Keep the source values unless you specifically need to match a target — downsampling discards high frequencies and upsampling adds no real detail.
Why is a big file slow or memory-heavy?
Everything is held in memory as uncompressed PCM while it converts, so very long or high-sample-rate files use a lot of RAM and take longer to encode. For hour-long files, trimming to the part you need first keeps it snappy.
How do I use the Audio Converter?
Simply type or paste your value and read the result, which refreshes the instant you change something. There is nothing to submit and nothing to wait for.
Do I need to install or sign up for anything?
Not at all — it runs in the browser with nothing to install and no account. After it loads once, it even works without an internet connection.
Is my information private?
Yes. Everything happens in your browser. Nothing you type is sent to a server or saved anywhere.
Common Use Cases
MP3 for compatibility
Convert an M4A, OGG, or FLAC to MP3 so it plays everywhere.
WAV for editing
Turn a compressed file into lossless WAV for a DAW or video editor.
Shrink a recording
Re-encode a big WAV voice memo to a small MP3 for sharing.
Match a target spec
Force 44.1 kHz / 16-bit / stereo (or mono) to meet an upload requirement.
Trim and normalize
Cut to the part you need and even out the volume in one pass.
Last updated: