Supported formats and browser capabilities.
Transparent, verified technical matrix for audio decoding, video playback review, export formats, and hardware memory policies.
Audio format compatibility
All audio files are decoded in client RAM via the Web Audio API and rendered to uncompressed 16-bit WAV.
| Format | Extensions | Decoding Engine | Rendered Export | Notes |
|---|---|---|---|---|
| WAV | .wav | Native | 16-bit PCM WAV (Lossless) | Instant decoding. Studio baseline format. |
| MP3 | .mp3 | Native | 16-bit PCM WAV | Ubiquitous podcast, interview, and voiceover format. |
| M4A / AAC | .m4a, .aac | Native | 16-bit PCM WAV | Standard format for Apple Voice Memos and mobile recordings. |
| FLAC | .flac | Native | 16-bit PCM WAV | Lossless audio archives and professional acoustic takes. |
| OGG Vorbis | .ogg, .oga | Native | 16-bit PCM WAV | Open-source audio and voice messaging recordings. |
Video container compatibility
Audio is extracted locally in your browser with synchronized video preview. Video streams are never re-encoded.
| Format | Supported Codecs | Timeline Review | Rendered Export | Notes |
|---|---|---|---|---|
| MP4 | H.264 / AAC, AV1 | Full A/V Sync | Edited Audio WAV + Browser Cut Preview | Standard container for YouTube, screen recordings, and camera footage. |
| WebM | VP8 / VP9 / AV1 + Opus / Vorbis | Full A/V Sync | Edited Audio WAV + Browser Cut Preview | Modern web video standard with excellent compression efficiency. |
| QuickTime MOV | H.264 / ProRes (where browser supports) | Full A/V Sync | Edited Audio WAV + Browser Cut Preview | Common recording container on macOS, iOS, and professional capture cards. |
Browser capabilities and memory limits
AutoSilenceCut runs in modern browsers supporting the Web Audio API and HTML5 video playback.
| Browser | Version | Audio Decode | Offline Audio | Memory Limit |
|---|---|---|---|---|
| Google Chrome / Chromium | Desktop 90+ | Full | Full | 1 GB (~60 min) |
| Apple Safari | macOS 14+ / iOS 16+ | Full | Full | 1 GB Desktop / 250 MB Mobile |
| Mozilla Firefox | Desktop 95+ | Full | Full | 1 GB (~60 min) |
| Microsoft Edge | Desktop 90+ | Full | Full | 1 GB (~60 min) |
1 GB Desktop Memory Safety Cap
Decoded uncompressed 32-bit floating point audio requires ~30 MB of RAM per minute of stereo recording. The 1 GB desktop limit safely accommodates recordings up to 60 minutes without risking browser tab crash.
250 MB Mobile Memory Policy
Mobile operating systems (iOS and Android) enforce strict per-tab memory quotas. The 250 MB mobile cap ensures smooth, responsive analysis on smartphones and tablets without OS-level memory terminations.