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Record microphone audio locally, requires mic permission
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
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