100% private. Files never leave your device.
Audio and Video Converter
Convert audio and video files right in your browser. MP3 to WAV, video to MP3, audio to MP4 for YouTube, and more. Nothing is uploaded, everything happens on your device.
Why convert files in your browser
Online converters make you upload your files to someone else's server, wait in a queue, and hope the site deletes your data afterward. This converter does the opposite: the conversion software runs directly in your browser tab using WebAssembly, so your files never leave your device. There is no queue, no account, no watermark, and no file size trap that pushes you toward a paid plan.
What you can convert
Drop in an audio file (MP3, WAV, OGG, M4A, FLAC, Opus) or a video file (MP4, WebM, MOV, MKV, AVI) and pick a target. Audio to audio covers everyday needs like MP3 to WAV for editing or FLAC to MP3 for a phone. Audio to video turns a podcast episode or song into an MP4 with a cover image, which is what YouTube and social platforms require. Video to audio extracts the soundtrack as MP3 or WAV. Video to video switches containers, for example MOV to MP4.
How it works
The conversion engine is FFmpeg, the same open-source tool professionals use, compiled to WebAssembly so it runs in your browser. The first conversion downloads the engine (about 30 MB); your browser caches it, so later conversions start instantly. Conversion itself happens on your device, which means speed depends on your computer and the file size. Short clips convert in seconds; long videos take longer.
Quality notes
Converting between lossy formats (like MP3 to OGG) always loses a little quality, because each format throws away different details. For the best results, convert from a lossless source (WAV or FLAC) when you have one. The quality selector sets the bitrate for MP3, M4A and Opus: 192 kbps is a good default, 320 kbps is near-transparent, 128 kbps makes smaller files for voice recordings.
Planning estimate only. Results use the list prices shown and may differ from your actual bill. Terms
Frequently asked questions
Do my files get uploaded to a server?
No. The converter downloads a small conversion engine once, then every conversion runs locally in your browser tab. Your files never leave your device, which also means there is no queue and no one else can see or keep your files.
Why is the first conversion slow?
The first run downloads the FFmpeg conversion engine, about 30 MB of WebAssembly code. Your browser caches it afterward, so the second conversion starts right away. If you clear your browser cache, it downloads once more.
Which formats are supported?
Inputs: MP3, WAV, OGG, M4A, AAC, FLAC, Opus audio, and MP4, WebM, MOV, MKV, AVI video. Outputs: MP3, WAV, OGG, M4A, FLAC, Opus audio, and MP4, WebM video. Pick any combination the target menu offers.
Will converting reduce audio quality?
It depends on the formats. Lossless to anything (WAV or FLAC to MP3) keeps all the quality the target format allows. Lossy to lossy (MP3 to OGG) loses a little each time, so avoid converting the same file repeatedly. Use 320 kbps for music you care about.
Why would I turn audio into a video file?
Platforms like YouTube, TikTok and Instagram only accept video uploads. Turning a podcast episode, song or voice memo into an MP4 with a cover image is the standard way to publish audio there.
Is there a file size limit?
There is no hard limit, but everything runs in your browser's memory. Files up to a few hundred megabytes usually work fine; hour-long 4K videos may run out of memory on phones or older computers. If a conversion fails on a huge file, try a shorter clip.