Free online audio converter. Select MP3, WAV, OGG, AAC or FLAC, choose a bitrate or a preset and download the converted file. No sign-up.
Audio format work by OnlinePCApps since 2013
A sound file in the wrong format will not play, takes too much room or will not load into an app. The free online audio converter puts it in the format the job needs.
An M4A from an Apple device or an OGG from a download will not open in every player or car stereo. An online audio converter turns it into MP3, the most widely supported audio format, so the track plays almost anywhere.
A WAV recording is huge, near 10 MB a minute, which fills a phone or a mail limit fast. The online audio converter turns it into MP3 or AAC at a sensible bitrate, cutting the size to a tenth while the ear hears little difference.
Voice, a podcast and music need a different balance of size and sound. The audio converter has four quick presets that set the format and bitrate together, so the right balance is one select away.
Drag one audio file onto the panel above, or browse for it on the device. The online audio converter takes a file up to 100 MB, and Change File swaps it for another.
Select a Quick Preset, or set the Target Format to MP3, WAV, OGG, AAC or FLAC. The Bitrate field takes 64 to 320 kbps, so size is set before the convert.
In the online audio converter, select the Convert button, which names the format. When Conversion Complete shows, play the result, then select Download Converted Audio. Convert Another starts over.
To convert audio means re-encoding the same waveform under a different format. The online audio converter does that for one file at a time.
Set the Target Format to MP3, WAV, OGG, AAC or FLAC and the online audio converter re-encodes the file added. The file picker takes audio files up to 100 MB.
Four Quick Presets set format and bitrate together: Voice (small) AAC at 96, Podcast (balanced) MP3 at 128, Music (standard) MP3 at 192 and Music (high) MP3 at 320. The Bitrate field takes 64 to 320 kbps.
The audio converter shows a player for the original file with its name and size. When the convert ends, a second player plays the result with its new name and size beside it, so the output is checked before it is saved.
Download Converted Audio saves the file as the original name plus converted and the new extension. Convert Another clears the panel for the next track, and Change File swaps the source first.
To convert audio, to turn a WAV into MP3 and to make a FLAC from an MP3 all name one job. A search for audio converter or MP3 converter lands on the online audio converter above.
Re-encoding moves the sound into a fresh format. The cases below show what the online audio converter gives and what it leaves out.
| The case | Result | What happens and why |
|---|---|---|
| Target Format | five outputs | MP3, WAV, OGG, AAC or FLAC, set in a list or by a preset. |
| MP3 | most compatible | Lossy and small. It plays on almost any player, phone or car stereo. |
| AAC | smaller than MP3 | The same quality at a smaller size. The Voice (small) preset uses it at 96 kbps. |
| OGG | open lossy | A free lossy format that suits games, the web and open players. |
| WAV | lossless, large | Full uncompressed audio at near 10 MB a minute. |
| FLAC | lossless | The same lossless sound at about half the size of WAV. |
| Bitrate | 64 to 320 kbps | A number field in steps of 32. A higher rate keeps more detail at a larger size. |
| Quick Presets | four | Voice (small), Podcast (balanced), Music (standard) and Music (high). |
| File size | up to 100 MB | One file at a time. A larger file needs FFmpeg or a desktop tool. |
| M4A, Opus, WMA | not an output | Only five output formats are offered. Use VLC or FFmpeg for the rest. |
| Extract from video | not on this page | The file picker takes audio. Use VLC or a video editor to save the sound first. |
| Batch or ZIP | not supported | One file at a time. Select Convert Another for the next track. |
| Trim, sample rate, channels | no controls | None of these are set here. Use an audio editor or FFmpeg. |
| Tags and cover art | no editor | This page has no tag or cover control. A music manager edits them. |
| Lossy to lossless | no restore | An MP3 turned to WAV stops more loss but cannot rebuild detail already gone. |
| Where it runs | on the device | The audio is re-encoded in the browser, so nothing is uploaded. |
The Same Sound, a Different Format
An audio format is a way of packing the same waveform into a file. A conversion unpacks the sound from one format and packs it into another, which is why the track sounds the same while the file, its size and its reach differ. The honest points sit around lossy against lossless. MP3, AAC and OGG are lossy, small because they drop sound the ear is least likely to notice. A bitrate up to 320 kbps sets how much is kept. WAV holds the full uncompressed audio and runs near 10 MB a minute, while FLAC compresses that same lossless sound to about half without losing a thing. One rule holds throughout: turning a compressed MP3 into a lossless WAV stops any further loss but cannot add back the sound the earlier compression removed, and repeating lossy conversions stacks the loss every time. The best result starts from the highest-quality original on hand. The online audio converter offers five output formats and four presets for one file at a time, with no trim, batch or video extraction. The references below set out the main formats.
The online audio converter and a hosted converter both convert a sound file. The trade is real, and a recording is often a personal thing.
| Point of comparison | This tool Online audio converter On the device | Hosted converter Uploaded and converted on a server |
|---|---|---|
| Where the files go | Never leave the device | Uploaded to a server |
| Price and caps | Free, up to 100 MB | Free tier often capped |
| Hour-long lossless masters | Up to 100 MB a file | Works straight from disk |
| Deep tag and cover editing | No tag or cover editor | Full tag and art editor |
| A library of thousands | One file at a time | The entire library at once |
Those last three rows favor a desktop tool, since an hour-long master, a deep tag edit and a library of thousands all call for more than one file of 100 MB. For a handful of everyday tracks, the online audio converter is quick and free. Online file tools and whether yours uploads covers where a web tool sends its input.
FFmpeg, built to WebAssembly, decodes and re-encodes every track inside the browser, so the work is client-side and the audio stays on the machine that opened it. Nothing is handed to a remote server to finish it.
A recording can be a private thing, a voice memo, an interview or a demo never meant to sit on an outside server. A hosted converter must send every file up to a server to change its format, far more exposure than a simple format swap warrants.
All of these convert a sound file. They differ from the online audio converter in effort, in price and in setup.
Apple Music, VLC and FFmpeg all sit on the machine, yet one leans on its own library, one buries the option and one lives in the terminal. The online audio converter needs only a browser tab and offers four presets.
A few notes point to the format that fits.
MP3 suits wide playback on any device. AAC suits Apple gear at a smaller size. WAV or FLAC suits archiving and editing where the full sound matters, and the destination usually points to one. The online audio converter offers all four.
A lossy format at 320 kbps sounds close to the source at a fair size, while 128 kbps saves room with a softer sound. For speech a lower bitrate is fine, and for music a higher one holds the detail. The audio converter Bitrate field runs from 64 to 320.
Turning a compressed MP3 into a lossless WAV stops further loss but cannot bring back sound already gone. For the cleanest result in any online audio converter, start from the highest-quality source on hand.
The online audio converter takes one file at a time, up to 100 MB. A library of thousands, or lossless masters of many gigabytes, belongs to the desktop edition, which re-encodes an entire set in one pass.
Point it at a folder of tracks and every file is re-encoded to the target format in a single run, saved beside the original.
Hour-long lossless masters and concert recordings that run to gigabytes are handled straight from disk, past what a browser tab holds.
Saved presets convert a set to a target format, bitrate and sample rate in one click, ready for a repeated workflow.
No sign-up needed. Open the online audio converter, add a file and select a format.