When should I use WAV or FLAC instead of MP3?

WAV and FLAC are uncompressed or losslessly compressed, so they sound identical to the source but produce much larger files. Use those when quality matters more than size, like archiving a master recording — MP3 remains the safest default for the widest compatibility.

What does Same as original do?

It estimates the bitrate of your source from its file size and duration and encodes the output at a matching bitrate. The summary line states the figure used. It is the best choice when you want the same quality in a different format.

What happens if I drop a file that is not audio?

It is turned away as soon as it loads: a message says Couldn't read this audio file, it may be damaged or not audio, and that nothing was used from your trial, and Convert stays off. A text file renamed .mp3 is caught this way. Formats your browser cannot play but that are real audio (such as WMA or AMR) are still accepted so the converter can try them.

Can I convert several files at once?

Yes. Choose Several files (ZIP) at the top, pick the format and quality once, and drop the files. Each is converted with those settings (Same as original uses each file's own bitrate) and you download one ZIP. A file that cannot be converted is marked on its own row and does not stop the others. The whole batch counts as one use, taken when you download (one file or the ZIP) and never when you press Convert all or if every file fails; up to 5 files on the trial, more on a paid plan.

Can I trim the file after converting it?

Yes. Next to Download there is a Continue with Audio Trimmer button that carries the converted file over, so you do not need to download and re-upload it.

Why is my WAV file so much bigger than the MP3?

WAV stores uncompressed 16-bit audio, so its size depends only on the length of the recording. MP3, OGG and M4A discard some detail to be small. Choose a lossy format if size matters and WAV or FLAC if you want to keep everything.

Will the converted file keep its title and artist tags?

The tool copies the metadata of the source into the new file, so tags such as title and artist normally come across. Cover art is kept for MP3, M4A and FLAC outputs, and left out of OGG and WAV.

Does it change my original file?

No. The original stays untouched on your device, and you download a separate new file. If the output format matches the input's extension, the new file gets -converted added to its name so the two cannot be confused.

How accurate is the estimated size?

It is bitrate multiplied by duration, so for MP3, OGG and M4A it is close but approximate, since encoders vary the rate. It is not shown for WAV or FLAC, whose size follows the audio content instead.

Home/Audio Tools/Audio Converter

Audio Converter

Convert between MP3, WAV, OGG, M4A, and FLAC

Files never storedRuns on your device

Your files are processed on your device. The first use downloads a processing engine, which your browser then keeps.

Drop an audio file to convertTap to choose an audio file to convert

or click to browseor tap to choose

Convert between audio formats

Large files (over 500 MB) may take longer or run out of browser memory

About Audio Converter

Converts an audio file between common formats (MP3, WAV, OGG, M4A, FLAC), since different platforms and devices expect different audio formats. Runs entirely in your browser — the audio never leaves your device.

Watch: Audio Converter in Action

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When should I use WAV or FLAC instead of MP3?: WAV and FLAC are uncompressed or losslessly compressed, so they sound identical to the source but produce much larger files. Use those when quality matters more than size, like archiving a master recording — MP3 remains the safest default for the widest compatibility.
What does Same as original do?: It estimates the bitrate of your source from its file size and duration and encodes the output at a matching bitrate. The summary line states the figure used. It is the best choice when you want the same quality in a different format.
What happens if I drop a file that is not audio?: It is turned away as soon as it loads: a message says Couldn't read this audio file, it may be damaged or not audio, and that nothing was used from your trial, and Convert stays off. A text file renamed .mp3 is caught this way. Formats your browser cannot play but that are real audio (such as WMA or AMR) are still accepted so the converter can try them.
Can I convert several files at once?: Yes. Choose Several files (ZIP) at the top, pick the format and quality once, and drop the files. Each is converted with those settings (Same as original uses each file's own bitrate) and you download one ZIP. A file that cannot be converted is marked on its own row and does not stop the others. The whole batch counts as one use, taken when you download (one file or the ZIP) and never when you press Convert all or if every file fails; up to 5 files on the trial, more on a paid plan.
Can I trim the file after converting it?: Yes. Next to Download there is a Continue with Audio Trimmer button that carries the converted file over, so you do not need to download and re-upload it.
Why is my WAV file so much bigger than the MP3?: WAV stores uncompressed 16-bit audio, so its size depends only on the length of the recording. MP3, OGG and M4A discard some detail to be small. Choose a lossy format if size matters and WAV or FLAC if you want to keep everything.
Will the converted file keep its title and artist tags?: The tool copies the metadata of the source into the new file, so tags such as title and artist normally come across. Cover art is kept for MP3, M4A and FLAC outputs, and left out of OGG and WAV.
Does it change my original file?: No. The original stays untouched on your device, and you download a separate new file. If the output format matches the input's extension, the new file gets -converted added to its name so the two cannot be confused.
How accurate is the estimated size?: It is bitrate multiplied by duration, so for MP3, OGG and M4A it is close but approximate, since encoders vary the rate. It is not shown for WAV or FLAC, whose size follows the audio content instead.

How to use Audio Converter

Drop an audio file. Under Output Format, choose MP3, WAV, OGG, M4A or FLAC; MP3 is selected to begin with. For the three lossy choices, MP3, OGG and M4A, a Quality row appears with Same as original (the default), High (largest file), Standard and Small (smaller file), together with an approximate kbps figure and estimated size once the duration is known. WAV and FLAC are lossless and ignore that row.

A file that is not audio is turned away the moment it loads, with a message that nothing was used from your trial. To convert many files, choose Several files (ZIP) at the top, set the format once and drop them: they come back as one ZIP.

Press Convert and wait for the progress bar. A summary line then compares the original and new sizes, a player lets you listen to the result, and Download saves it under the original name with the new extension. If you convert to the format you started with, the name gains -converted.

When to use it

Reach for it when a device or editor will not open a file: a WAV recording too large to email that should be an MP3, an M4A voice memo that a podcast host wants as MP3, or a FLAC track you need smaller for a phone. Same as original is useful when you simply want a compatible copy without choosing a bitrate yourself.

When not to use it

Converting a lossy file such as MP3 into WAV or FLAC cannot bring back detail that was already discarded; it only makes the file bigger. Converting between lossy formats repeatedly also degrades the sound each time. This tool changes format and nothing else, so for trimming, joining or volume changes, use an audio editor instead.

Tips for best results

Leave Quality on Same as original when you only need a different container, since the tool then matches the source's bitrate instead of guessing. Choose Small for spoken-word recordings, where lower bitrates are less noticeable than in music. Read the estimated size line before converting; it is calculated from bitrate and duration. Choose MP3 for the widest compatibility and FLAC when you are archiving.

Limitations

Output uses fixed encoders: LAME for MP3, Vorbis for OGG, AAC for M4A, and 16-bit PCM for WAV. Only the first audio stream of a file is converted. Album art is carried over to MP3, M4A and FLAC outputs, but not to OGG or WAV. The whole file is held in memory while converting, so very large files may be blocked, and the first use downloads the processing engine.

Privacy

Your audio is loaded into the memory of your browser tab and converted by an ffmpeg engine built for WebAssembly, so the conversion happens on your own device and the recording is never uploaded. Only the engine's files are fetched, from the jsDelivr content network, the first time an audio or video tool runs in that session. That request contains nothing from your file.