Convert an audio file to the format you actually need, with real control over bitrate and quality instead of a single “convert” button. Your title and artist tags come across, the before and after specifications are shown side by side, and nothing is kept afterwards.
FLAC 563 kbps
MP3 192 kbps
1.8 MB → 0.6 MB
Preserved
Everything runs with FFmpeg on our server. No AI model, no third-party audio service, and the file goes nowhere else.
MP3, WAV, M4A, OGG and FLAC as input or output. Any combination works, including lossless to lossless.
MP3 at 128, 192, 256 or 320 kbps. M4A and OGG on a Q0–Q9 scale with the target bitrate printed next to every step, so the label is never a guess.
Title, artist, album and comments survive the conversion in every format. Turn it off with one checkbox if you would rather strip them.
Keep the channel layout or force mono. Mono halves the size of a spoken-word file with no audible loss.
The result screen probes the finished file, so the codec, bitrate, sample rate and size you see are what you actually got.
The download keeps the name you uploaded with the new extension, so a batch of files stays recognisable.
Drop in the file. It is inspected with FFprobe, so a renamed file that is not really audio is rejected immediately.
Choose the output. The quality control changes to match — a bitrate list for MP3, a quality scale for M4A and OGG, nothing for the lossless formats.
Channels and tag handling. Both have sensible defaults, so you can skip this.
Read the before and after table, then download. Your upload is deleted the moment the conversion finishes.
Plays on everything. 192 kbps is the sensible default for speech and music alike.
Uncompressed and lossless, around 10 MB per minute. Right for editing, wrong for sharing.
AAC in an MP4 container. Slightly better than MP3 at the same bitrate.
Vorbis with true variable bitrate. Excellent quality per megabyte, but not universal.
Lossless but compressed, about half the size of WAV with identical audio.
Limits. 200 MB or 3 hours per file, whichever comes first, and ten files per visitor per day. Two conversions run at once and the rest wait briefly in a queue. These limits are what keep the tool genuinely free.
You recorded to WAV or FLAC and the upload form refuses it. Convert to MP3 at 192 kbps and it goes straight through.
M4A from a phone recorder is fine on Apple devices and awkward everywhere else. MP3 fixes that in one step.
An archive of WAV files becomes roughly half the size as FLAC with no loss at all.
Mono at a modest bitrate is the right shape for spoken word, and halves the file.
Converting a lossy file to a lossless one does not bring back what was already thrown away. An MP3 turned into FLAC is a bigger file containing exactly the same audio. Convert to lossless only when your source is lossless.
Going from one lossy format to another loses a little more each time, because the audio is decoded and re-encoded. If you still have the original recording, convert from that rather than from an export of an export.
This tool changes the container and codec. It does not fix levels, remove noise or trim silence — for loudness and topping and tailing, use the Podcast Audio Studio.
Converting to a lossless format (WAV, FLAC) never loses anything. Converting to a lossy format (MP3, M4A, OGG) always discards some data — at 192 kbps and above most people cannot hear it on speech.
192 kbps is the practical default. 128 kbps is fine for plain speech and noticeably smaller. 320 kbps only makes sense when the source is already high quality.
Yes, in all five formats. There is a checkbox to strip them instead if you are sharing the file and would rather not pass metadata on.
A quality level rather than a fixed bitrate. Each step shows the bitrate it targets, so Q5 on M4A and Q6 on OGG both land around 192 kbps.
200 MB or 3 hours per file, and ten files per day. No account is needed, so the daily limit is counted per visitor.
The upload is deleted as soon as the conversion finishes and the result is removed at the latest two hours later. There is no account and no database.
Pick a format, set the quality and download the result.
Open the Audio Converter →This page belongs to Bubixo Voice and Speech Tools, where every tool in the category is listed. These are the ones people usually open next.