Tools

Mix speech or audio with different background noises and control levels. Useful for speech-in-noise listening practice or simulating real-world sound environments.

Play speech faster or slower while keeping pitch natural. Use it for speed listening practice, testing comprehension at higher speeds, or previewing audio quickly.

Paste HTML, CSS, and JavaScript and see the result instantly in your browser. Includes device-width presets and sandboxed preview, useful for quick testing and debugging.