Turn your volume down before you start, especially at high frequencies. Everything is generated live by your browser - no audio files.

Record, trim and download clips locally.

Record or upload audio and change your voice with 12 DSP presets, then save a WAV.

Generate tones and effects with the Web Audio API.

Shift pitch and playback rate of any audio file.

Build a tax invoice with line items, discount and tax, then print or save it as PDF.

Quoted fields, escaped newlines and delimiter sniffing handled correctly.

Decode a JWT into its header, payload and claims timeline, and see at a glance whether it has expired.

Dial in all eight corner radii, watch the shape change and copy the exact CSS.