MP3 Converter – Free, Fast & Private
Convert any audio or video file to MP3 locally in your browser — nothing is ever uploaded
How to convert audio or video to MP3
Choose or drag in your audio or video file — nothing is uploaded, it stays on your device.
Conversion starts instantly — the audio is extracted and encoded to MP3 right in your browser, with live progress.
Download your MP3 file.
Everything happens right here in your browser: your file is converted locally on your device with WebAssembly FFmpeg and is never uploaded to any server. Because there is no upload, there is no practical length limit either — multi-hour recordings and files up to 8GB convert just fine, and even a huge file starts instantly. Read more: how in-browser conversion works →
About audio or video to MP3 conversion
MP3 is still the one audio format that everything can play: every phone, browser, car, smart speaker and 20-year-old iPod. This tool converts whatever you have — M4A, WAV, FLAC, WMA, or the soundtrack of a video — into a clean 192–320kbps MP3.
The conversion happens on your own device with WebAssembly FFmpeg. No upload means no waiting for gigabytes to crawl to a server, and no copy of your recording existing anywhere but your machine.
Frequently asked questions
Drag your file into the box above (or click to choose it). The conversion starts instantly in your browser, a progress bar tracks it, and you download the finished MP3 — no signup, no email, no watermark.
Yes — drop in an MP4, MOV, MKV or any other common video and the audio track is extracted and converted to MP3. Because only the audio is processed, even long videos finish quickly.
MP3 at 192–320kbps is transparent for speech and near-transparent for music. If your source is a lossy format already (M4A, WMA), the difference after one conversion is inaudible in normal listening.
No. The conversion runs entirely in your browser using WebAssembly (FFmpeg). Your recording never leaves your device — that is also why there is no upload wait, no queue and no file-size pricing. For personal recordings, lectures and meetings this matters more than anywhere else.
Up to 8GB on desktop browsers and 2GB on mobile — big enough to pull the audio out of a multi-hour lecture or meeting recording. There is no limit on the number of files, no signup and no watermark.
192–320kbps, which is transparent for speech and very close to transparent for music. The audio stream is decoded once and encoded once — there is no extra generation loss from server-side re-processing.
Yes — completely free and unlimited, with no watermark, signup or daily quota. Because the conversion runs on your own device instead of our servers, there are no processing costs to charge for.
Yes. It runs in any modern browser — Chrome, Safari, Edge or Firefox — on Windows, macOS, ChromeOS, Linux, iOS and Android. There is nothing to install.
Audio-only work is fast: there is no video to re-encode, so even the soundtrack of a long video converts in well under real time. Files whose audio is already MP3 are rewrapped without re-encoding and finish in seconds.
Yes. Our sister site Red Panda Transcribe (redpandatranscribe.com) turns the MP3, M4A or WAV you export here into text right in your browser — like this tool, nothing is uploaded, and there is no time limit and no signup. It exports TXT, SRT and VTT.