How to use Audio Converter
The Audio Converter transforms audio files between the most popular formats — MP3, AAC, OGG, FLAC, WAV and OPUS — directly in your browser with no server uploads. Use it to convert lossless FLAC recordings to streaming-friendly AAC, re-encode voice memos to OGG for web embedding, or produce uncompressed WAV files for audio editing workflows.
- Click "Select Audio" and open the source audio file (MP3, WAV, FLAC, AAC, OGG or OPUS).
- Choose the output format from the format selector.
- For lossy output formats, set the quality or target bit rate.
- Optionally adjust the sample rate and number of channels (mono/stereo).
- Click Convert and download the output file when the conversion finishes.
Your data never leaves your device — 100% private processing.
Choosing the right audio format
Different audio formats suit different use cases. MP3 is the most universally supported lossy format and is fine for music streaming and podcasts. AAC (used in M4A files) offers better quality than MP3 at the same bit rate and is preferred on Apple platforms and YouTube. OGG Vorbis is an open-source lossy format used heavily in games and web audio. FLAC is a lossless format that preserves every detail of the original recording, making it ideal for archiving. WAV is uncompressed PCM — the largest but most editing-friendly format. OPUS is a modern low-latency codec excellent for voice calls and web streaming.
| Format | Type | Best for |
|---|---|---|
| MP3 | Lossy | Universal music playback |
| AAC / M4A | Lossy | Apple, YouTube, high-quality streaming |
| OGG Vorbis | Lossy | Web audio, games |
| OPUS | Lossy | Voice calls, low-latency streaming |
| FLAC | Lossless | Archiving, audio editing |
| WAV | Uncompressed | DAW import, professional editing |
Sample rate and channel considerations
Sample rate defines how many audio samples are captured per second. 44.1 kHz is the CD standard and is suitable for music. 48 kHz is the broadcast/video standard and is used in most video production. Reducing a stereo file to mono halves the file size and is appropriate for voice-only content such as podcasts. Converting from a lower sample rate to a higher one does not add quality — it only increases file size — so always match or reduce the output sample rate to the source.
Worked examples
FLAC to 192 kbps MP3
Inputs: 4-minute lossless track → MP3
Result: ~5.8 MB MP3
Stereo to mono podcast
Inputs: Stereo 128 kbps downmixed to mono
Result: About half the file size
MP3 bitrate, quality and size per minute
| Bit rate | Quality | Size per minute |
|---|---|---|
| 128 kbps | Good | ~0.96 MB |
| 192 kbps | Very good | ~1.44 MB |
| 256 kbps | Near-transparent | ~1.92 MB |
| 320 kbps | Maximum MP3 | ~2.4 MB |
Glossary
- Sample rate
- The number of audio samples captured per second, measured in Hz or kHz; CD quality is 44,100 Hz (44.1 kHz).
- Bit depth
- The number of bits used for each audio sample; 16-bit is CD standard, 24-bit is used in professional recording.
- Lossless compression
- Compression that reduces file size without discarding any audio data, allowing perfect reconstruction of the original.
- Transcoding
- Converting a media file from one codec or format to another, which involves decoding and re-encoding the data.
- Mono vs stereo
- Mono audio uses one channel; stereo uses two (left and right). Mono files are half the size of equivalent stereo files.
Related reading
Frequently Asked Questions
Why use Audio Converter?
- Convert between MP3, AAC, OGG, FLAC, WAV and OPUS in a single browser-based step
- Set output bit rate and sample rate to match the exact specification of the target platform
- Downmix stereo to mono to halve file size for voice-only podcast episodes
- Convert lossless FLAC archives to AAC without installing any desktop application
Common use cases
- Convert a WAV vocal recording to AAC M4A for uploading to an Apple Podcasts feed
- Re-encode OGG sound effects to MP3 for a game engine that does not support OGG Vorbis
- Compress a FLAC album to 192 kbps MP3 to fit on a device with limited storage
- Resample a 44.1 kHz audio file to 48 kHz WAV to match the sample rate of a video project
- Produce an Opus version of a podcast episode to reduce streaming bandwidth costs
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