Is my audio file uploaded to a server?

No. The entire conversion happens inside your browser. Your audio is read into memory on your own device, re-encoded locally by a WebAssembly build of FFmpeg, and the converted file is handed straight back to you as a download — no byte of the audio is ever sent to us or anyone else. This is especially valuable when the file is a private voice note or recording; the original never leaves your machine, and only the converted copy is produced. Close the tab and nothing is retained.

Which formats can I convert between?

You can convert from MP3, WAV, M4A, AAC, OGG, and FLAC — the formats people most commonly run into. You can convert to one of three targets: MP3 (192 kbps, the universal choice that plays everywhere), WAV (uncompressed 16-bit PCM, ideal for importing into editors), or M4A (the modern, efficient AAC format at 192 kbps). You pick the output format; the quality settings are sensible fixed defaults, so there is nothing else to configure.

Will the conversion reduce quality?

It depends on the direction. Converting to WAV is lossless and adds no further compression. Converting to MP3 or M4A re-encodes the audio at 192 kbps, which is a high-quality setting that most listeners cannot distinguish from the original in normal use. Converting a lossless source such as FLAC or WAV to MP3 or M4A is inherently lossy, but 192 kbps is chosen as a pragmatic balance of quality and file size. Converting an already-compressed file does not restore quality that was lost earlier.

Why does the first conversion download about 30 MB?

The conversion is done by a full build of FFmpeg compiled to WebAssembly so it can run inside your browser. That engine is about 30 MB, and it downloads once the first time you use the tool. After that your browser caches it, so later conversions start right away without downloading it again. This one-time cost is what lets the audio be converted on your own device instead of on a server you would have to upload it to.

Is there a limit on file size?

Yes — 500 MB. Because the work is done entirely by your own device inside a browser tab, the file has to fit in the tab’s memory while it is processed, and very large files would risk crashing the tab. Audio files are rarely anywhere near this large, so in practice the limit almost never gets in the way — even a long, high-quality recording usually sits comfortably under it.

Convert

Audio Converter

Convert an audio file to MP3, WAV, or M4A right in your browser. Accepts MP3, WAV, M4A, AAC, OGG, and FLAC. Nothing is uploaded. Free, no signup.

By the Samastam teamLast updated 2026-06-14

Drop an audio file here, or click to browse

Everything runs in your browser — nothing is uploaded

An audio converter changes a sound file from one format to another — turning an M4A voice note into an MP3, a large FLAC download into a smaller MP3, or a compressed file into an uncompressed WAV for editing. This tool reads your audio locally and re-encodes it to the format you choose, entirely inside your browser. Pick one of three widely used targets — MP3 for universal playback, WAV for lossless editing, or M4A for a modern, efficient file — and download the converted result. It accepts the formats people actually have on their devices: MP3, WAV, M4A, AAC, OGG, and FLAC. Because the work happens on your own machine, your audio never leaves your device; a private voice note, a music download, or a recorded interview all stay local, and only the converted file is produced.

What this is and why it matters

Audio formats multiply faster than the devices meant to play them. A voice note arrives as an M4A or OGG that a desktop player refuses to open. A song downloads as a FLAC that sounds great but is far too large to send over chat. A video editor will only import clean WAV, not the compressed file you have. An old car stereo or a basic phone plays MP3 and nothing else. In each case the audio is fine — it is just in the wrong container or codec for what you need to do next. Converting is how a file you already have becomes a file the thing in front of you will actually accept.

This tool converts in the browser rather than on a server, for the same privacy reason as the rest of the toolkit. Audio is often personal — a private voice note, a confidential recording, an unreleased track — and uploading a whole file to a conversion website just to change its format is both slow and a privacy risk. Here the audio is read into memory on your own device, re-encoded locally, and handed straight back. Nothing is transmitted and nothing is stored.

Three output formats cover the situations that come up most. MP3 at 192 kbps is the universal choice that plays on every phone, app, and car stereo. WAV is uncompressed PCM, ideal when you need to import audio into a video or music editor without further loss. M4A uses the modern AAC codec for files that are efficient and well supported across current devices. Whatever you start with, you get back exactly one of these, ready to use.

How to use this tool

Add your audio file. Drag it onto the drop zone above, or click to open the file picker and choose a file from your device. MP3, WAV, M4A, AAC, OGG, and FLAC are all accepted. The moment it is selected, the tool reads it locally and shows the file name and its size. Nothing uploads — everything happens on your own machine. Files must be under 500 MB.

Choose the output format. Pick MP3, WAV, or M4A depending on what you need the file for. Choose MP3 when you want something that plays absolutely everywhere and stays small. Choose WAV when you need uncompressed audio to import into an editor. Choose M4A when you want a modern, efficient file for current devices. There are no bitrate or quality settings to fiddle with — each format uses a sensible fixed default.

Let the engine load on first use. The first time you convert, the tool downloads a one-time engine of about 30 MB into your browser. This happens only once — afterwards it is cached and later conversions start immediately.

Convert and download. Press Convert and the tool re-encodes your audio into the chosen format, showing a live percentage as it works. You can cancel at any time. When it finishes, it shows the format and size of the converted file and offers it for download, named after your original file with the new extension.

Examples and use cases

Turning a WhatsApp voice note into a normal MP3

A Bengaluru professional received an important WhatsApp voice note saved as an M4A, but the desktop media player they use at work refuses to open it. They drop the file in, choose MP3, and get back a standard MP3 that plays in any player on their laptop. The voice note never left their machine — fitting, since it was a private message.

Shrinking a FLAC download to share on a basic phone

A Chennai music lover has a high-quality FLAC track that is over 40 MB — far too large to send over chat and unsupported on a relative’s basic phone. They convert it to a 192 kbps MP3, which is a fraction of the size and plays on virtually any device, then share it easily without uploading the original anywhere.

Exporting WAV for a video editor

A Hyderabad creator recorded an interview that ended up as a compressed M4A, but their video editing software only imports clean WAV audio. They convert the file to uncompressed 16-bit WAV on their own device and drop it straight into the timeline, with no quality loss from re-compression during editing. Because the interview audio stays on their laptop the whole time, even a sensitive off-the-record conversation never has to be uploaded to a stranger’s conversion site just to change its format from one codec to another.

Converting a game or app OGG to MP3

A Pune user extracted an OGG audio file from a game and wants it in a playlist on their phone, which does not handle OGG well. They convert it to MP3 in the browser and add it to their music app — quick, local, and with nothing uploaded to a random conversion site.

Frequently asked questions

Is my audio file uploaded to a server?: No. The entire conversion happens inside your browser. Your audio is read into memory on your own device, re-encoded locally by a WebAssembly build of FFmpeg, and the converted file is handed straight back to you as a download — no byte of the audio is ever sent to us or anyone else. This is especially valuable when the file is a private voice note or recording; the original never leaves your machine, and only the converted copy is produced. Close the tab and nothing is retained.
Which formats can I convert between?: You can convert from MP3, WAV, M4A, AAC, OGG, and FLAC — the formats people most commonly run into. You can convert to one of three targets: MP3 (192 kbps, the universal choice that plays everywhere), WAV (uncompressed 16-bit PCM, ideal for importing into editors), or M4A (the modern, efficient AAC format at 192 kbps). You pick the output format; the quality settings are sensible fixed defaults, so there is nothing else to configure.
Will the conversion reduce quality?: It depends on the direction. Converting to WAV is lossless and adds no further compression. Converting to MP3 or M4A re-encodes the audio at 192 kbps, which is a high-quality setting that most listeners cannot distinguish from the original in normal use. Converting a lossless source such as FLAC or WAV to MP3 or M4A is inherently lossy, but 192 kbps is chosen as a pragmatic balance of quality and file size. Converting an already-compressed file does not restore quality that was lost earlier.
Why does the first conversion download about 30 MB?: The conversion is done by a full build of FFmpeg compiled to WebAssembly so it can run inside your browser. That engine is about 30 MB, and it downloads once the first time you use the tool. After that your browser caches it, so later conversions start right away without downloading it again. This one-time cost is what lets the audio be converted on your own device instead of on a server you would have to upload it to.
Is there a limit on file size?: Yes — 500 MB. Because the work is done entirely by your own device inside a browser tab, the file has to fit in the tab’s memory while it is processed, and very large files would risk crashing the tab. Audio files are rarely anywhere near this large, so in practice the limit almost never gets in the way — even a long, high-quality recording usually sits comfortably under it.