Audio Effect Timeline

Audio Effect Timeline is a browser-based audio editor for applying effects only to selected parts of an uploaded audio file. You can add echo only to the first second, make a later phrase play from the right ear, add a short 3D-style movement, mute an unwanted word, or create quick sound-design changes without opening a full desktop editor. Many online audio effect tools apply one effect to the whole file. This tool focuses on range-based editing: drag on the waveform canvas to select a timeline range, then assign echo, reverb, 3D movement, left only, right only, telephone tone, bass boost, volume adjustment, or mute to that section. The segment list shows exact start and end times, making it useful for video sound, podcasts, streaming clips, ASMR-style moments, and short social audio edits. Your audio is not uploaded to a server. Processing runs locally with the Web Audio API, and the edited result can be exported as MP3 or WAV. No account or installation is required. Video files such as MP4, MOV, and WebM are accepted as well. Only the audio track is extracted and processed just like an audio file.