Choose WAV or FLAC as the output format
The Options card shows Output format with two buttons, WAV and FLAC. WAV is selected when the card opens. Pick the one your program or device can open.
Convert Audio
Add one MP3, WAV or FLAC file, choose WAV or FLAC as the output format and download the converted file.
Drop a file here
MP3WAVFLAC
Or import from
Dropbox
Google Drive
URL
- Sent over HTTPS
- Free-tier files deleted within 24 hours
- No account for one file
- You add
- One MP3, WAV or FLAC file
- You set
- Output format: WAV or FLAC
- You get
- A new WAV or FLAC file to download
Converting audio means saving the same recording in a different file format, for a player or an upload form that rejects the one you have. Add one MP3, WAV or FLAC file, choose WAV or FLAC under Output format and press Run Convert Audio. The download is a new file, and your own copy stays as it was.
What can you do with the audio converter?
Turn an MP3 into a WAV or FLAC file
An MP3 can go to either format, which helps when a program refuses MP3. The new file stores the sound the MP3 still has, and what the encoder removed stays removed.
Check the file card before you run
Once you add a file, a card shows its name and its size in MB. Press Replace if you picked the wrong recording. The file picker lists .mp3, .wav and .flac files.
Watch the job and download the result
Press Run Convert Audio and the page shows Processing with a percentage while indox servers do the work. When it says Conversion complete, press Download to save the new file, or Convert another to start again.
What stays and what changes when you convert audio
What stays
- The original file on your device. The converter makes a new file and leaves yours alone.
- Length and loudness. The page has no trim, speed or volume setting, and none is sent.
- Sample rate and number of channels. The page sets neither, so the converter does not change them.
What changes
- The sound is written as audio only. A cover picture stored as a video stream in the source is not copied, so check the artwork on the download.
- WAV is written as 16-bit PCM. A source with a higher bit depth is converted to 16 bits.
- FLAC is lossless: decoding it returns the audio that was encoded, in less space than WAV.
- An MP3 converted to WAV or FLAC gives a bigger file. The detail the MP3 encoder removed does not come back.
- Tags such as title and artist are stored differently in each format. Check them on the download.
Which output format for which job
This page offers two outputs, WAV and FLAC. The table says which one fits each job.
| You need | Pick | Why |
|---|---|---|
| To edit the recording in an audio program | WAV | WAV holds uncompressed PCM audio, which editors read without decoding work. |
| An archive copy that wastes no space | FLAC | FLAC is lossless and takes less storage than WAV. |
| A lossless file for a player that does not read FLAC | WAV | Test the download on the device first, because support for FLAC differs between players. |
| A smaller file for sharing or a phone | Another page | This page has no MP3 output. Use WAV to MP3, after turning a FLAC into WAV here. |
| Better sound from an MP3 | Neither | Converting cannot add back what the MP3 lost. Start from the original recording if you have it. |
How do you convert an audio file?
Add your audio file
Drop one MP3, WAV or FLAC file on the box above, or click it to browse. A file card then shows the name and the size in MB.
Choose the output format
In the Options card, pick WAV or FLAC under Output format. WAV is already selected, so switch to FLAC if your file is a WAV.
Run and download
Press Run Convert Audio and wait while the page shows Processing. When it says your file is ready, press Download.
Why convert audio with indox?
The page has one setting, Output format, with two buttons, so you see everything the job will do before you start it. One file converts without an account, inside the free quota. Your file is encrypted in transit, and on the free tier indox deletes it automatically within 24 hours after the job finishes.
- One setting: Output format
- One file without an account
- Encrypted in transit
- Free-tier files deleted within 24 hours
- Original file left unchanged
What are the limits of the audio converter?
- Size
- The free tier has a file size limit. Signing in raises it, and paid plans raise it further.
- Formats
- This page works with MP3, WAV, FLAC files. For another file type, open the conversions list.
- Privacy
- Files are encrypted in transit and processed on indox infrastructure.
- Deletion
- Free-tier files are deleted automatically within 24 hours after the job finishes. Signed-in output stays in your history for your plan's retention period.
Limits worth knowing
- The box takes one file per run. There is no batch upload on this page.
- MP3 cannot be chosen as the output format on this page. To make an MP3, use the WAV to MP3 or FLAC to MP3 page.
- Choosing the format your file already has is not a conversion and is not supported. For a WAV file pick FLAC, and for a FLAC file pick WAV.
- Each format stores tags such as title and artist in its own way. Check them on the download.
When the result is not what you expected
Most surprises come from what the source file could already hold.
| What you see | Why | What to do |
|---|---|---|
| The WAV is far bigger than the MP3 | WAV stores the audio uncompressed | Pick FLAC instead if you need a lossless file that takes less space. |
| The sound is no better than the MP3 | The MP3 encoder already removed that detail | Use the original recording, not the MP3, as the source. |
| Cover art or tags are missing | The file is written as audio only, and each format stores tags its own way | Open the download in your player and add the tags or the picture again. |
| A player will not open the FLAC | Not every player reads FLAC | Choose WAV as the Output format and convert the file again. |
| You need an MP3 and only WAV and FLAC are offered | MP3 is not an output on this page | Use WAV to MP3, after turning a FLAC into WAV here. |
What do the free and paid plans add?
Free
- All converters
- Daily credit refresh
- Email support
Basic
- Access to all features
- AI Extract
- Priority conversions
- Email support
Highest priority
Premium
- Everything in Basic
- Highest priority queue
- Larger file limits
- Priority support
Pay-As-You-Go
- No subscription
- Credits never expire
- Opt-in auto-refill
- Access to all features
What else can you do?
Who is the audio converter for?
Editors who need a WAV file
Your editing program or sampler asks for WAV, and the clip you were sent is an MP3 or a FLAC. Convert it to WAV and import the download.
Collectors who store music as FLAC
You have WAV recordings and want them in a format that compresses the audio without discarding any of it. Choose FLAC, then keep the WAV until you have listened to the result.
People whose file will not open
A player or an upload form rejects the format you have. Convert the file to the other format and try it again.
When to convert audio
- An upload form accepts WAV and your recording is an MP3.
- You are about to edit an MP3 and want to work on a WAV copy.
- Your WAV recordings fill the disk and you want FLAC copies.
- A device plays WAV and will not play your FLAC file.
Where can I read more?
Sources
- ffmpeg documentationFFmpeg
- FLAC format specificationXiph.Org Foundation
- Web audio codec guideMDN Web Docs
- WAVE Audio File FormatLibrary of Congress
Facts checked on October 16, 2026
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Convert Audio FAQs
Does converting MP3 to WAV or FLAC improve sound quality?
No. An MP3 encoder discards the parts of the sound that are harder to hear, and that data is gone from the file. The WAV or FLAC stores the audio the MP3 still has.
Why is the WAV file so much bigger than my MP3?
A WAV file normally holds uncompressed PCM audio, and MP3 is a compressed format made for small files. The extra size comes from storing the audio uncompressed and adds no detail to the recording.
Is FLAC better than WAV?
Both formats can hold audio with nothing discarded. FLAC compresses it, so the file takes less storage, and it has its own system for tags and cover art. WAV is very widely used, so check that your player or device opens FLAC before you switch.
Will I lose quality converting WAV to FLAC?
The FLAC format does not discard audio: decoding a FLAC file gives back what was encoded. This page does not show the sample rate or bit depth of the file it writes, so listen to the download before you delete the WAV.
Which audio formats can I convert here?
The file picker takes .mp3, .wav and .flac files. An MP3 can go to WAV or FLAC, a WAV goes to FLAC and a FLAC goes to WAV.
Will my tags and cover art carry over?
The three formats store tags differently: MP3 uses ID3, WAV uses an INFO chunk and FLAC has its own tag system. Open the download in your player and check the title and the cover art.
Should I convert an MP3 to WAV before editing it?
It helps. Audio loses quality each time it is encoded as MP3, so edit a WAV or FLAC copy and export an MP3 only when you are done.
Do I need an account to convert audio?
No. One file converts without signing in, inside the free quota. An account raises the file size limit and paid plans raise it further.
What happens to my file after the conversion?
It is encrypted in transit and processed on indox servers. On the free tier, indox deletes it automatically within 24 hours after the job finishes. Output from a signed-in account stays in its history for the plan's retention period.