Audio Converter
Convert MP3, WAV, AAC, FLAC, OGG, M4A, Opus, and other supported media directly in your browser. Extract sound from compatible video files or wrap audio in MP4/WebM with an optional cover image. Choose the output format and available encoding settings, then download the result without uploading your source media to Pixwit.
Convert audio in your browser
Drag and drop a supported audio or video file, or click to choose. Processing stays on your device.
Or drag and drop a file here. Processing stays on your device.
Detecting supported export formats…
No file? Try a sample in another format
Load the same short vocal sample in MP3, WAV, FLAC, and other formats to test conversion settings
How to Convert an Audio File
Add an audio or video file
Choose the media you want to convert, up to 500MB. Common inputs include MP3, WAV, FLAC, AAC, OGG, M4A, Opus, MP4, MOV, and WebM. Compatible video files can be used when you only need their sound. The source is decoded locally in your browser rather than uploaded to Pixwit for conversion.
Choose an output format and settings
Select the format that fits your next workflow. MP3 and AAC are practical for compact listening and sharing, WAV is useful for uncompressed PCM workflows, FLAC preserves audio information with lossless compression, and Opus is an efficient modern codec. When available, adjust sample rate, channels, or bitrate before conversion; MP4/WebM output can use a black frame or custom cover.
Convert and download
Start the conversion and keep the page open while your browser processes the media. Download the new file when it is ready. If the output is intended for another application, editor, website, player, or device, verify that the destination supports the selected format and codec before deleting your original source.
Audio Conversion Features
Nothing leaves your browser
The audio converter processes files in your tab using WebCodecs. We do not receive your audio or video — ideal for unreleased tracks, client dailies, and private voice recordings.
Broad format support
Import MP3, WAV, AAC, FLAC, OGG, M4A, M4R, WMA, Opus, AIFF, AMR, MP4, MOV, or WebM. Export popular audio formats or a still-image MP4 / WebM for social workflows — one audio converter covers both audio-only and audio-to-video exports.
Fine-grained control
Optional sample rate, mono/stereo, and bitrate for lossy codecs — ideal for podcasts, voiceovers, and smaller files when you convert audio with this browser tool.
Audio to video
Export a 1280×720 clip with a black background or your own JPEG/PNG/WebP cover — handy when a platform expects video files instead of plain audio.
Which Audio Format Should You Choose?
Choosing an output format is usually about balancing compatibility, sound quality, file size, and what you plan to do next. MP3, WAV, FLAC, AAC, M4A, OGG, and Opus are not interchangeable labels: some describe codecs, some are containers, and each fits different playback, editing, storage, or delivery workflows.
MP3 for broad compatibility
MP3 is a lossy audio format with very broad support across phones, computers, players, websites, and editing applications. It is a practical choice for music, speech, downloads, and sharing when compatibility and relatively compact files matter. Because MP3 removes some audio information to reduce size, keep a higher-quality source when you may need to edit or encode the material again later.
WAV for uncompressed audio workflows
WAV commonly contains uncompressed PCM audio and is widely used in recording, editing, and production workflows. The trade-off is file size: an uncompressed WAV can be far larger than an MP3, AAC, or Opus version of the same recording. Choose WAV when an application expects PCM or when an uncompressed working copy is more important than storage efficiency.
FLAC for lossless storage
FLAC uses lossless compression, which is designed to reduce storage requirements while preserving the original audio information. It is useful for music libraries, archives, and other cases where retaining audio quality matters. Converting FLAC to a lossy delivery format can create a smaller file, but keep the FLAC source if you want a lossless copy for future use.
AAC and M4A are related but not identical
AAC is an audio codec, while M4A is a file extension commonly used for an MP4-based container that holds audio such as AAC. This distinction matters when troubleshooting compatibility: two files can have different extensions or containers while using related audio encoding. AAC is widely used for efficient music and media delivery, especially in modern device and streaming ecosystems.
OGG and Opus for open and modern workflows
OGG is a container associated with open multimedia formats and may contain codecs such as Vorbis or Opus. Opus is a modern lossy codec designed to work efficiently across speech and general audio use cases. Support varies between applications and devices, so check the destination workflow before choosing a less universally supported format.
Audio Conversion, Compression, and Audio-to-Video
Audio conversion vs. audio compression
Conversion changes a file’s format, codec, or container, while compression focuses on reducing the data needed to store the media. The two can happen together but are not the same. WAV to MP3 changes format and usually reduces size because MP3 is lossy; FLAC to WAV can increase size because WAV commonly stores uncompressed PCM. If size reduction is your main goal, the related Audio Compressor is the more direct tool.
Convert audio for compatibility
A file may sound fine but still be unusable in a particular editor, player, device, website, or publishing workflow. Converting to a format accepted by the destination can solve that compatibility problem. Before converting a large library, test one file first and confirm that the target application recognizes the codec, container, channels, and sample rate you selected.
Extract sound from a video file
When the audio you need is stored inside MP4, MOV, or WebM, you can use a compatible video as the input and create an audio-only output. This is useful for narration, interviews, recorded presentations, voice tracks, or other situations where the visual portion is no longer needed.
Convert audio to MP4 or WebM
Some publishing workflows expect a video file rather than standalone audio. Audio-to-video output combines the sound with a still visual frame and packages the result in MP4 or WebM. You can use a black background or supported cover image. This is a container workflow for your existing audio; it does not generate new video footage from the sound.
Audio Conversion FAQ
Related tools
Convert Your Audio File
Return to the tool above, choose the output format and available encoding settings, and convert your media locally in the browser.