Convert audio files to MP3 or WAV in your browser, whatever format they arrived in: M4A and AAC from phones, OGG and Opus voice messages, FLAC from music downloads, WebM from browser recorders, or the soundtrack of a video. MP3 is the format that plays on almost anything; WAV is the one every audio editor imports. This audio file converter takes up to 200 files in one batch and decodes and re-encodes each one on your own device, so nothing is uploaded. A mixed folder is fine: every file comes back in the format you picked, together in one ZIP.
How it works
- Drop the files in any mix of formats, up to 200 at a time and 2 GB in total. Each one is listed with its length and sample rate before anything is converted.
- Choose MP3 for listening and sharing, with a bitrate from 128 to 320 kbps, or WAV for editing. Trim and fades, if you set them, apply to every file.
- Convert and download a single file, or one ZIP holding every converted file plus a report that names any file that failed and why.
Questions
- Can I convert many audio files at once?
- Yes. Drop up to 200 files, or 2 GB in total, and they convert one after another with the same settings. One result downloads as a normal file; more than one comes back as a ZIP with _report.txt and _report.json listing each input, its output name and any error. If three files in a row fail with the same error, the batch stops instead of repeating it on every file left.
- Can it convert audio to FLAC, AAC or OGG?
- No. Output is MP3 or WAV only: FLAC, M4A/AAC, OGG and Opus files can be converted from, not to. Those two outputs cover nearly every player, phone, editor and upload form. WAV is written directly as 16-bit PCM, and MP3 is encoded by LAME, the open-source MP3 encoder, compiled to run inside the page.
- Should I convert to MP3 or WAV?
- MP3 when the file is for listening, sharing or a device short on space: a minute of music at 192 kbps is about 1.4 MB. WAV when it is going into an editor, a DAW or a system that asks for WAV: it is uncompressed, roughly 10 MB a minute in stereo, and loses nothing more when you edit and save it again. Neither can add quality the source never had.
- Does my file get uploaded?
- No. The models and all processing run inside your browser on your own device. You can verify this yourself: open your browser’s DevTools, watch the Network tab, and process a file: there are no uploads. After the first visit most tools also work fully offline.
- Which formats can it read?
- Anything your browser can decode: MP3, WAV, M4A/AAC, OGG, Opus, FLAC and the audio track of MP4/WebM/MOV video. Output is MP3 or WAV, the two formats that open everywhere.
- Does converting to MP3 lose quality?
- MP3 is lossy, so some information is discarded, though at 192 kbps and above most people cannot hear the difference. WAV output is lossless and correspondingly larger. Converting MP3 to WAV does not restore quality that was already gone.