Convert AVI to WAV Online
Extract audio from AVI files to uncompressed WAV. No servers, no signup.
.avi · up to 100 MB
What you can do
Legacy AVI audio to clean uncompressed WAV
DivX archive recovery
Extract MP3 or AC3 audio from your old DivX/XviD AVI files to uncompressed WAV for remixing or archiving.
100% private
Your AVI file never leaves your device. Local WebAssembly conversion without a server.
PCM / MP3 / AC3 → WAV
Decode any audio format inside the AVI to clean linear PCM in standard WAV.
Transcription-ready
Resulting WAV compatible with Whisper, Google Speech-to-Text, and any AI transcription tool.
How it works
Three steps, no hassle
Upload your AVI file
Drag or select your .avi file — DivX clip, VCD rip, corporate video, or home recording. Up to 500 MB.
Audio extraction
FFmpeg.wasm demultiplexes the AVI container and decodes PCM, MP3, or AC3 audio to uncompressed WAV in your browser.
Download your WAV
WAV ready to edit in Audacity, import into your DAW, or process for speech transcription.
FAQ
Got questions?
AVI (Audio Video Interleave) was created by Microsoft in 1992 as part of the Video for Windows (VfW) standard. During the 1990s and 2000s it was the most widely used video format on Windows, compatible with Windows 95, 98, XP, and Vista without installing additional codecs. The explosion of internet video sharing between 1999 and 2008 — with Kazaa, eMule, BitTorrent, and the DivX era — generated tens of millions of AVI files that still exist on hard drives, CDs, and archive DVDs worldwide.
The AVI container can hold audio encoded in multiple formats: PCM (already uncompressed, most common in old camera recordings), MP3 (used extensively in DivX and XviD from the P2P era), AC3/Dolby Digital (in DVD rips), DTS (in high-quality DVD rips), ADPCM (in game video clips and Windows 95/98 multimedia), and occasionally AAC or Vorbis in newer files. FFmpeg decodes all these formats to uncompressed linear PCM for the resulting WAV file.
The most common use cases are: recovering soundtracks, dialogue, or sound effects from old AVI video clips, movies, or short films for use in contemporary music production; preparing corporate or instructional AVI video audio for transcription with speech recognition tools; restoring or remastering audio from old home recordings in AVI; extracting audio from AVI gameplay recordings for podcast or YouTube narrations; and recovering archived conference, talk, or presentation recordings in AVI.
Most DivX-era AVI files (1999-2008) have MP3 audio, typically at 128 kbps stereo or 192 kbps for higher-quality releases. Original DivX (based on MPEG-4 Part 2) was systematically combined with MP3 audio in the AVI container because it offered the best quality-to-size ratio with the hardware of the time. Higher-quality DVD rips could include the original DVD AC3 audio (Dolby Digital 5.1 at 192-384 kbps). In all cases, Convertir.ai decodes the MP3 or AC3 to uncompressed PCM in the resulting WAV.
Yes, and it is one of the most practical use cases. OpenAI Whisper, AssemblyAI, Google Speech-to-Text, and AWS Transcribe accept WAV as the preferred input format. The recommendation to maximize transcription accuracy is: 16 kHz or 44.1 kHz sample rate, 16-bit depth, mono or stereo. Convertir.ai generates a WAV with the original AVI audio parameters, which are typically adequate for transcription. If the original audio is low quality (home recording with background noise), transcription can benefit from an additional noise reduction step in Audacity or iZotope RX before AI processing.
AVI files with DivX or XviD video can have audio-video synchronization issues (A/V sync drift), especially in incorrectly encoded VBR MP3 files — a known issue from the early DivX years. If the resulting WAV has playback speed problems or seems shorter or longer than the video, this may be due to the AVI container sync issue. FFmpeg automatically attempts to compensate for A/V drift, but on heavily corrupted files it may be necessary to use AviSynth or an AVI repair tool before conversion.
Convert AVI to WAV: extract legacy video audio uncompressed for editing and transcription
The AVI (Audio Video Interleave) format was created by Microsoft in November 1992 as part of Video for Windows, the multimedia extension for Windows 3.1 designed to enable video playback on personal computers. AVI uses the RIFF (Resource Interchange File Format) container format — the same used by WAV audio files and MIDI files — with a chunk structure that interleaves video and audio data. During the 1990s, AVI was the standard Windows video format, pre-installed with necessary codecs (Indeo Video, Cinepak, Microsoft Video 1) for basic playback. With the arrival of DivX in 1999 — initially a cracked version of the Microsoft MPEG-4 v3 codec, later an independent codec based on MPEG-4 Part 2 — and subsequently XviD (the open-source alternative), the AVI container became the de facto standard for internet video sharing in the P2P era (2000-2008), generating hundreds of millions of files that still persist on hard drives and personal collections worldwide.
Extracting audio from AVI files to uncompressed WAV format addresses multiple practical needs in 2025. Music producers seeking samples in video clips, 90s and 2000s movies, or sound effect archives stored in AVI need the audio in WAV to import into their DAW. Corporate departments that archived years of internal training, presentations, and conferences in AVI format — the standard for Camtasia Studio and 2000s screencasting tools — need to extract audio for transcription and accessibility. Researchers and archivists working with historical audiovisual material in AVI need WAV for audio analysis, restoration, and long-term digital preservation. Content creators with old AVI gameplay recordings (Fraps was the standard screen capture tool on Windows XP and Vista, recording in AVI) need the audio for narration or commentary in new productions.
The technical process for AVI to WAV conversion in Convertir.ai uses FFmpeg.wasm running in WebAssembly inside the browser. The RIFF/AVI container is parsed to identify the movi chunks (media data) and the hdrl chunk (header with stream information); audio data is extracted from the AVI chunk and decoded with the appropriate codec (pass-through for native PCM, libmp3lame in decode mode for MP3, liba52 for AC3, libdca for DTS, or FFmpeg's built-in ADPCM decoder for ADPCM IMA, ADPCM MS, and ADPCM DVI/IMA variants used in Windows 95-98 era multimedia). The decompressed PCM data is written to a RIFF/WAV container with the fmt chunk specifying the sample rate, bit depth, and channel count of the original audio. One important technical note: some AVI files with variable bitrate (VBR) MP3 audio may exhibit audio-video desynchronization known as A/V drift; FFmpeg attempts to automatically correct this using the AVI index information (idx1 chunk or OpenDML index for extended AVI).