MP3 vs WAV vs FLAC: Which Audio Format Should You Use?

Use WAV while you record and edit, FLAC when you want to archive or share music without losing any quality at roughly half the size, and MP3 when the file has to play everywhere or stay small, such as podcasts, voice notes and web audio. WAV and FLAC are lossless; MP3 permanently discards some detail to save space.

Free toolAudio ConverterConvert audio files between MP3, WAV, FLAC, M4A, and OGG formats with custom bitrate and channel settings. All processing happens locally in your browser.Open the tool

What actually separates MP3, WAV and FLAC?

All three store the same kind of sound. The difference is how much of the data they keep and how they pack it.

WAV is uncompressed PCM audio. Every sample is written as-is, so the file is large and predictable: CD-quality stereo (16-bit, 44.1 kHz) runs at 1,411 kbps, which is roughly 10 MB per minute. Editors and recording software love it because there is nothing to decode. Its weak spot is metadata: tags such as artist, title and cover art are not handled consistently across players.

FLAC is lossless compression. Think of it as a ZIP file for audio: it shrinks the data, and when you play it back you get every original sample, bit for bit. Music files commonly land somewhere between 40% and 70% of the equivalent WAV size, depending on how dense the recording is. Quiet acoustic tracks compress better than loud, heavily mastered ones. FLAC also carries tags and cover art reliably.

MP3 is lossy compression. The encoder throws away parts of the signal that listeners are least likely to notice, and that detail never comes back. In return you get tiny files: 128 kbps is about 1 MB per minute and 320 kbps about 2.4 MB per minute. At 256 to 320 kbps most people cannot tell MP3 from the original on everyday equipment; at 96 kbps and below, cymbals and reverb tails start to sound smeared.

The key idea: lossless means you can always convert down later. Lossy means every conversion is a one-way street.

How to choose and convert the right format

Work through these steps in order and you will land on the right format for almost any file.

1. Identify the job the file is for. Is it a working file you will edit again, a master you want to keep, or a finished file for listeners? The answer decides everything below.
2. Keep working files and masters lossless. Record and edit in WAV. For long-term storage of finished music, FLAC gives you the same quality in less space.
3. Pick MP3 for delivery. Podcasts, voice memos, email attachments, website audio and anything headed to an unknown device should be MP3.
4. Open the converter and drop in your file. In the Audio Converter, drag your audio onto the drop area. It accepts MP3, WAV, M4A, AAC, OGG, FLAC and Opus, and it can pull the audio track out of a video file too. The first run downloads a processing engine of about 30 MB once; after that it starts instantly.
5. Choose the Output format. The dropdown lists MP3, WAV, FLAC, M4A (AAC), raw AAC, OGG (Vorbis) and Opus.
6. Set the Bitrate for lossy outputs. Pick 96, 128, 192 (marked recommended), 256 or 320 kbps. The bitrate only affects lossy formats; WAV and FLAC ignore it because they keep everything.
7. Click Convert and compare sizes. The result card shows the new file size next to the source size, with a player so you can listen before you download.

For a longer walk through every conversion path, including trimming and extracting audio, see the pillar guide on how to convert audio files in your browser.

Free toolAudio ConverterConvert audio files between MP3, WAV, FLAC, M4A, and OGG formats with custom bitrate and channel settings. All processing happens locally in your browser.Open the tool

MP3 vs WAV vs FLAC comparison table

Sizes below assume stereo at 44.1 kHz. FLAC varies with the material, so it is shown as a range.

	WAV	FLAC	MP3
Compression	None (PCM)	Lossless	Lossy
Quality vs original	Identical	Identical	Close to audibly identical at 256-320 kbps, weaker below 128 kbps
Size per minute	About 10 MB (16-bit)	Roughly 4-7 MB	About 1 MB at 128 kbps, 2.4 MB at 320 kbps
Metadata and cover art	Inconsistent	Reliable	Reliable (ID3 tags)
Plays on	Almost everything	Most modern phones, computers and browsers; some older devices and car stereos do not	Practically everything
Best for	Recording, editing, sound design	Archiving, lossless music sharing	Podcasts, web audio, sharing, older hardware
Re-encoding cost	None	None	Quality drops each time

Which format for which situation?

• Sending a demo to a client: MP3 at 320 kbps. Small enough for email and messaging, good enough to judge a mix.
• Handing stems or a mix to an engineer: WAV at the project’s original bit depth and sample rate.
• Backing up a music collection: FLAC. You keep the full quality and can create MP3 copies whenever you need them.
• Uploading a podcast episode: MP3, usually at 128 kbps or lower for speech. Check your host’s current requirements.
• Product videos and store audio clips: MP3 or M4A, since the file is streamed and size matters more than lossless fidelity.

Converting between the three without losing quality

Some conversions are free, others cost you something, and one is pointless.

WAV to FLAC and FLAC to WAV are lossless in both directions. The audio stays identical. One practical note for this tool: its WAV output is written as 16-bit PCM, so if your source is a 24-bit studio file, keep the original 24-bit master rather than overwriting it with a converted copy.

WAV or FLAC to MP3 is where the size saving happens. For a quick, dedicated route you can use the WAV to MP3 converter or the FLAC to MP3 converter, both of which let you choose the bitrate.

MP3 to WAV or FLAC does not restore anything. The discarded detail is gone; you simply get a much larger file containing the same MP3 sound. The one good reason to do it is compatibility: some editing apps or hardware samplers only import WAV. In that case, the MP3 to WAV converter is the right tool, just do not treat the result as a higher-quality master.

MP3 to MP3 at a different bitrate stacks a second round of lossy compression on top of the first. Going from 320 kbps down to 128 kbps is fine for size. Going from 128 kbps up to 320 kbps only makes the file bigger.

Common mistakes

• Converting MP3 to FLAC to “upgrade” it, which produces a file three to five times larger with no extra detail; keep the MP3 and find a lossless source if you need better quality.
• Archiving only MP3 copies of original recordings, which locks you into lossy audio forever; keep a WAV or FLAC master and generate MP3s from it.
• Re-encoding the same MP3 over and over, for example after every small edit, which adds artifacts each time; edit from the lossless master and export MP3 once at the end.
• Choosing 96 kbps for music to save space, which makes cymbals, applause and reverb sound watery; use 192 kbps or higher for music and reserve low bitrates for speech.
• Sending WAV files as email attachments, which often breaks size limits and fills the recipient’s inbox; send MP3 for listening and share WAV or FLAC through a file link only when someone needs the master.
• Assuming every player handles FLAC, which leads to silent files in older car stereos or hardware; test on the target device or deliver an MP3 alongside the FLAC.

Frequently asked questions

Is FLAC better quality than WAV? No, FLAC and WAV sound identical because both are lossless. FLAC is simply smaller and handles tags better, while WAV is simpler for editing software to read.

Can people hear the difference between MP3 and FLAC? At 256 to 320 kbps, most listeners on typical headphones and speakers cannot reliably tell them apart. Differences become easier to hear at low bitrates, on revealing equipment, or with dense material such as cymbals and applause.

Does converting MP3 to WAV improve sound quality? No, converting MP3 to WAV never improves quality. It only unpacks the already-compressed audio into a larger file, which is useful when an app or device refuses to import MP3.

What bitrate should I choose when converting to MP3? Choose 192 kbps for general music, 320 kbps when you want the best MP3 quality, and 96 to 128 kbps for speech such as podcasts or voice notes. Always convert from the best source you have, not from another MP3.

Is it safe to convert audio files in the browser? Yes, with this converter the file is processed on your own device and is not uploaded to a server. The only download is the processing engine itself the first time you use it.

Pick the format by the job, then convert once

There is no single best format, only the best format for a task. Keep WAV for the work in progress, FLAC for anything you want to preserve, and MP3 for anything you want other people to press play on. Convert from lossless to lossy as the final step, never the other way round expecting better sound.

When you are ready, open the Audio Converter, pick your output format and bitrate, and check the before-and-after file size before you download.