Audio Edit by Denim

Audio Edit is a private, offline-first audio editor that runs entirely inside Firefox. Import an audio file or record from your microphone, edit it on an interactive waveform, preview the result, and export a WAV file without uploading your audio anywhere.

Features include:

• MP3, WAV, M4A, AAC, OGG, FLAC and WebM import
• Microphone recording
• Interactive waveform, playback and timeline scrubbing
• Precise selection with millisecond time inputs
• Cut, crop, split and silence
• Direct clip-edge trimming
• Clip reordering, duplication, deletion and merging
• Fade in, fade out, normalization and reverse
• Gain adjustment and mono/stereo conversion
• Undo and redo history
• Compact editor and full-screen editing workspace
• Projects saved locally in the browser
• WAV export at 44.1 or 48 kHz
• Light and dark themes

All decoding, editing, recording, project storage and exporting happen locally on your device. Audio Edit has no accounts, analytics, advertising, trackers, remote code or network requests.