Audio 音量

MP3/AAC/FLAC/WAV/OGG/M4A conversion via FFmpeg command generator with tutorial

Trim audio clips locally with fade in/out, export as WAV

Text-to-speech with adjustable speed and pitch for reading aloud

Record microphone audio locally, requires mic permission

Merge multiple audio files in sequence with configurable gap, export WAV

Validate, pretty-print or minify JSON with error line:col reporting

Merge multiple PDF files in sequence, all processed locally in browser

Generate cryptographically secure passwords with custom length and charset