Audio 結合

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

Adjust audio volume and export, supports extracting audio from video

Record microphone audio locally, requires mic permission

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