Audio Converter: How to Convert Audio Files Between MP3, WAV, FLAC, and AAC Formats

Working with audio files means inevitably needing to convert between formats: compressing a WAV recording to MP3 for sharing, converting FLAC to AAC for portable devices, or changing sample rates for editing software. Each format serves a different purpose, and choosing the wrong one can mean bloated file sizes or audible quality loss.

You can convert any of these formats in seconds with the free audio converter — no installs, no uploads, all in your browser.

Audio Formats Compared

Format	Type	Typical Bitrate	Best For
MP3	Lossy	128–320 kbps	Sharing, podcasts, music players — universal compatibility
WAV	Lossless (uncompressed)	1,411 kbps (CD quality)	Editing, mastering, archival — huge files but zero loss
FLAC	Lossless (compressed)	~800–1,000 kbps	High-quality music storage — lossless but ~60% smaller than WAV
AAC	Lossy	128–256 kbps	Apple devices, YouTube, streaming — better quality than MP3 at same bitrate

Lossy vs. Lossless: The Key Decision

The most important question is whether you need lossless audio. WAV and FLAC preserve every bit of the original recording — essential if you are editing, mastering, or archiving. MP3 and AAC discard audio data the ear can barely perceive, which is fine for playback but bad as an editing source. Converting lossy to lossless does not restore quality: an MP3 converted to FLAC is still an MP3 with a bigger file size.

Which Bitrate Should You Use?

320 kbps MP3 / 256 kbps AAC — near-transparent quality for music; pick this for anything you will keep
192 kbps MP3 — good balance for podcasts and voice recordings
128 kbps — acceptable for speech, audibly lossy for music with cymbals and high frequencies
WAV/FLAC — no bitrate choice; quality is locked to the source

Common Conversion Scenarios

Scenario	Recommended Output
Emailing a voice memo	MP3 at 128–192 kbps to keep the file small
Uploading to a music player or phone	AAC or MP3 at 256–320 kbps
Recording a podcast for editing	WAV or FLAC from the source, export MP3 at the end
Archiving a vinyl or CD rip	FLAC — lossless with reasonable size
Video soundtrack extraction	Convert the audio track separately with the video converter if you need the whole file converted

Step-by-Step: Converting a File

Open the audio converter and select your source file (MP3, WAV, FLAC, AAC, OGG, M4A, and more)
Choose the output format based on the table above
Set the bitrate — higher for music you will keep, lower for speech or quick sharing
Convert and download the result; spot-check the first 30 seconds for quality

Mistakes to Avoid

Re-encoding repeatedly — every lossy conversion adds generational loss; keep the original WAV/FLAC as your master
Converting MP3 to FLAC — file size grows, quality does not
Ignoring sample rate — keep 44.1 kHz for music and 48 kHz if the audio pairs with video
Using 128 kbps for music — audible artifacts on complex tracks; use 256+ kbps

Convert your next file with the audio converter and you will get the format you need in seconds — no software install required.