Audio Converter

How to Convert Audio Files Online

1. Drop your audio or video file onto the upload area. MP3, WAV, M4A, FLAC, OGG, MP4 up to 500 MB are accepted.
2. Pick the output format: MP3 (universal lossy), M4A/AAC (Apple, lossy), OGG (Vorbis, lossy), WAV (uncompressed PCM), or FLAC (lossless compressed).
3. For lossy formats, pick a bitrate - 192 kbps is the default and a good balance of size and quality. Choose 320 kbps for music you care about, 128 kbps for podcasts.
4. Press Convert. The file uploads to our EU servers, FFmpeg re-encodes it, and you download the result.
5. Files auto-delete from our servers within 15 minutes.

Which format to pick

MP3 wins on universal compatibility. Every device made in the last 25 years plays it. The codec is old (1993) and slightly less efficient than modern alternatives, but it remains the safe default when you do not know the recipient.

M4A (AAC inside MP4 container) is what iTunes and Apple devices prefer. AAC sounds cleaner than MP3 at the same bitrate. Most modern players outside Apple also handle it.

OGG Vorbis is an older free-and-open lossy codec. Largely replaced by Opus today but still used in older Android apps and some game engines.

WAV stores raw uncompressed PCM samples. Files are huge (~10 MB per minute of stereo CD-quality) but every editing app reads them perfectly. Pick it for archival or DAW import.

FLAC is lossless compressed: smaller than WAV (typically 50-60 percent of the size) with byte-perfect reconstruction. Audiophile choice for music libraries.

Bitrate guidelines

• 96-128 kbps: voice, podcasts, audiobooks. Acceptable but lacks warmth on music.
• 192 kbps: default. Most listeners cannot tell from the original on consumer headphones.
• 256 kbps: enthusiast tier. Diminishing returns above here for MP3.
• 320 kbps: maximum MP3 bitrate. Use for archival of important recordings.

Lossy versus lossless, and why direction matters

Audio formats split into two families. Lossy codecs - MP3, AAC/M4A, OGG - permanently discard detail the encoder judges inaudible, trading fidelity for far smaller files. Lossless formats - WAV and FLAC - reconstruct the exact original samples, so they are large but perfect. The crucial rule is that quality only ever flows downhill. Converting a lossless source to MP3 is a normal, sensible step. Converting one lossy format to another - MP3 to AAC, OGG to MP3 - stacks a second round of discarded detail on top of the first and adds audible artefacts, especially in cymbals and reverb tails. And converting lossy up to lossless gains nothing: the FLAC simply preserves the limited quality the MP3 already had, at several times the size. Whenever you have the original lossless file, convert from that rather than from an intermediate lossy copy.

Pulling audio out of a video

You can drop a video file - MP4, WebM, MOV or MKV - straight into the converter and pick an audio format. The video track is discarded and only the soundtrack is re-encoded, so this doubles as a quick way to rip a song or a podcast segment out of a screen recording or a downloaded clip. It is the same operation as the dedicated extract audio from video tool, just with the full format and bitrate menu exposed. If you only need to shorten an audio file without changing its format, the audio trimmer does that losslessly and faster, since it copies the stream rather than re-encoding it.

Speed, limits and privacy

Conversion runs roughly in real time or faster - a 5-minute MP3 finishes in about 5-10 seconds plus upload time, with WAV and FLAC encoding slightly slower. The 500 MB upload cap corresponds to roughly a 10-hour stereo file at 320 kbps, comfortably above any normal use. The file is sent over HTTPS to our EU server, FFmpeg re-encodes it there, and the result is returned through a signed, time-limited download URL. Both the upload and the converted output are deleted within 15 minutes and the link expires with them. Nothing about the audio is logged, transcribed or retained beyond that window.