Convert OPUS to WAV Online
Decode Discord/WhatsApp audio to uncompressed WAV for editing, DAW import, and Audacity. Free, in your browser.
.opus · up to 100 MB
What it's for
OPUS to WAV: audio ready for editing and analysis
Import into any DAW
16-bit PCM WAV is the universal editing format: Audacity, Pro Tools, Logic Pro, Adobe Audition, and any other.
Speech-to-text preprocessing
Whisper, Google Speech API, and other voice recognizers require WAV PCM. Convert your Discord or WhatsApp voice notes.
100% private
Personal or confidential voice messages are never uploaded to any server.
No additional loss
Opus→PCM decoding is exact. The WAV faithfully represents the Opus audio with no further degradation.
How it works
Three steps, no hassle
Upload your OPUS file
Drag or select your .opus or .ogg file with Opus audio. Discord voice messages, WhatsApp audio, Telegram voice notes, WebRTC recordings. Up to 50 MB.
Decoding to PCM
FFmpeg.wasm decodes the Opus stream to uncompressed PCM at 48 kHz. The result is a standard WAV with no additional loss.
Download your WAV
16-bit PCM WAV at 48 kHz ready to import into Audacity, Pro Tools, Adobe Audition, or any audio analysis tool.
FAQ
Got questions?
No. Opus is a lossy codec: when encoding the original audio to Opus, the frequency components that the perceptual model considers inaudible are irreversibly discarded. When decoding back to WAV, those components are not recovered — the resulting WAV is a perfect representation of the Opus audio, with no additional loss, but also with no improvement over the Opus. The WAV will have exactly the same quality as the original Opus file. If the Opus had compression artifacts at a low bitrate, those artifacts will be present in the resulting WAV. The utility of converting to WAV is not to improve quality but to achieve format compatibility with tools that do not import Opus directly.
The main use cases are: importing Discord or WhatsApp voice messages into a DAW (Audacity, Adobe Audition, GarageBand, Pro Tools, Logic Pro) for editing, waveform analysis, noise removal, or plugin processing; using Telegram voice recordings as source material in audio production projects; preprocessing audio for speech recognition systems (speech-to-text) that require WAV PCM as input (Google Speech-to-Text API, OpenAI Whisper, Vosk); and forensic audio analysis where specialized tools require uncompressed PCM. It is also useful for normalizing format before concatenation or mixing operations on multiple audio files from different sources.
The resulting WAV is at 48 kHz, the native sample rate of Opus per RFC 6716. If you need 44.1 kHz (to import into CD projects or DAWs configured at that rate), you can do a subsequent resample in your DAW. Audacity, for example, allows you to easily change the project frequency and automatically converts on import if the project frequency is different. All channels from the original Opus are preserved in the WAV: if the Opus was mono, the WAV will be mono; if it was stereo, the WAV will be stereo.
Yes. The 16-bit PCM WAV at 48 kHz generated by this tool is one of the most basic and universally supported formats by any audio software. Audacity (versions 2.x and 3.x) imports it without any issues. It also works with Adobe Audition, GarageBand, Logic Pro, Pro Tools, Reaper, Ableton Live, FL Studio, and any other DAW or audio editor. For voice recognition projects with Whisper (OpenAI), 16 kHz mono WAV is the optimal input; if the original Opus was at a higher frequency, you can downsample to 16 kHz in Audacity before processing.
The expansion factor is considerable. A typical 1 MB Opus file (corresponding to several minutes of voice at low bitrate) becomes a WAV of approximately 50–100 MB depending on the duration and number of channels, because WAV stores audio with no compression (linear PCM). One minute of stereo WAV audio at 48 kHz and 16 bits takes 11.5 MB, compared to the 240 KB that the equivalent in Opus at 32 kbps takes. This is normal and expected: converting to WAV always expands the file. If you only need playback, there is no point in converting to WAV; use it when you need to edit or process the audio.
For basic forensic analysis, yes: the resulting PCM WAV is a lossless-additional representation of the original Opus audio, ensuring that any waveform, spectrogram, or level analysis exactly reflects the content of the Opus file. However, for certified forensic analysis it is important to document the chain of custody of the original file and use certified forensic tools (such as iZotope RX Forensic Edition or platform-specific analysis tools). The Opus→WAV conversion performed here is deterministic: the same Opus file always produces the same WAV, facilitating integrity verification via MD5 or SHA-256 hash.
Convert OPUS to WAV: decode voice messages for Audacity, DAW, and speech recognition
Opus is a lossy audio codec, like MP3 or AAC but more efficient, that permanently discards during encoding the frequency components that its perceptual masking model determines to be inaudible or imperceptible to the human listener at a given bitrate. When decoding an Opus file to WAV, the decoding is exact and deterministic: the libopus decoder reconstructs the PCM signal that was produced during encoding, without any additional compression or data loss step. The result is a WAV file that faithfully represents the audio as stored in the Opus, which in turn is a high-fidelity representation of the original audio depending on the encoding bitrate used. This process is fundamentally different from conversion between two lossy formats like Opus to MP3, where each step introduces cumulative degradation that reduces the quality of the final result. The Opus to WAV conversion does not recover the quality that was discarded during the original encoding, but it also introduces no additional perceptible degradation: the only loss is the minimal quantization of -96 dB when converting the internal 32-bit float representation to 16-bit integer PCM, which is completely masked by the audio content. The need for this conversion arises frequently when working with audio from messaging applications like Discord, WhatsApp, and Telegram that store all their voice communication in Opus format, but whose content needs to be processed, edited, or analyzed with tools that require uncompressed PCM audio as their mandatory input format. The process is completely free and requires no signup or installation of additional software.
Speech recognition systems represent one of the most important use cases for Opus to WAV conversion in the current era of AI-powered transcription tools. OpenAI Whisper, the most popular speech recognition model of 2023-2024, accepts multiple audio formats but works internally with mono 16 kHz WAV PCM for its processing and produces better results when provided with the optimized WAV directly without additional internal conversion. The Google Speech-to-Text API v1 requires that linear PCM audio (LINEAR16) be in WAV or raw PCM without a header for maximum accuracy mode. Vosk, the open-source offline speech recognition system from Alpha Cephei, explicitly requires mono 16 kHz WAV PCM as its mandatory input format and does not accept any other variant without preprocessing. For all these systems, having Discord, WhatsApp, or Telegram voice messages converted to WAV format eliminates any possible source of error in the transcription pipeline. Additionally, conversion to WAV is necessary for audio analysis with specialized tools such as iZotope RX for restoration and spectral analysis, MATLAB Signal Processing Toolbox, librosa the Python audio analysis library, or Sonic Visualiser for musicological analysis. It is also useful for importing recordings into DAWs like Audacity, Pro Tools, Logic Pro, and Ableton Live for editing, noise removal, volume normalization, or processing with VST and AU plugins. In all these cases, WAV PCM is the most basic and universally supported input format. All conversion occurs locally in the user's browser via FFmpeg.wasm, ensuring complete privacy. There is no limit on the number of files per session and no usage restrictions on any available function.
Convertir.ai performs the Opus to WAV conversion entirely in the browser using FFmpeg.wasm, the WebAssembly port of the FFmpeg engine compiled with support for the libopus decoder. The process opens the OGG or WebM container holding the Opus stream, decodes it with libopus to 48 kHz floating-point PCM (the native sample rate of Opus per RFC 6716), converts to 16-bit integer PCM, and writes a standard WAV file with a complete RIFF/WAV header including the correctly formatted fmt and data chunks per the Microsoft WAV PCM specification. The resulting WAV is directly importable in any audio software without additional plugins, including Windows Media Player, Audacity, Adobe Audition, Pro Tools, Logic Pro, GarageBand, Reaper, and any other editor or DAW. The libopus decoding is exact and deterministic: the same Opus file always produces the same WAV, allowing integrity verification via MD5 or SHA-256 cryptographic hash for archival or chain-of-custody workflows. There is no additional loss beyond the conversion from 32-bit float to 16-bit integer, which introduces a quantization floor of -96 dB completely masked by the audio content. All processing occurs in browser memory with no transfers to external servers, with complete privacy for personal or confidential voice recordings. No signup, no quantity limit, no watermark. The tool is compatible with Chrome, Edge, Firefox, and Safari on desktop and mobile without any additional configuration. The resulting file follows IETF and Xiph.org open standards for maximum compatibility with audio players and software. The process is completely free and requires no signup or installation of additional software.