Easily convert video and audio files to various formats, compress media, extract audio to MP3, and create GIFs. Optimize your multimedia for any device or platform with this all-in-one tool.
GoBook ZA by Mark Nicol






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Easily convert video and audio files to various formats, compress media, extract audio to MP3, and create GIFs. Optimize your multimedia for any device or platform with this all-in-one tool.




Easily estimate the amount of paint and man-hours required for any room. Input room dimensions and subtract openings like doors and windows for an accurate calculation. Adjust for multiple coats to finalize your project needs.


Calculate Annual Percentage Yield (APY) and simulate investment returns based on it. This intuitive and easy-to-use application simplifies financial calculations for users.


Generate random names, avatars, and detailed profiles including emails, phone numbers, and physical addresses. This tool is ideal for creative projects, software testing, or enhancing online privacy.


Easily create and edit professional documents like invoices, quotations, and resumes. Convert files between various formats, including PDF and images, with advanced processing options like OCR and password protection. Optimize documents for size and clarity.




Detect and measure invisible high-frequency flickering in LED lights and screens that can cause eye strain and headaches. Find flicker-free alternatives to improve your comfort and health.


Monitor your home's energy storage system in real time. Track solar power, battery levels, and grid interactions to optimize usage, lower bills, and ensure power during outages. This intelligent tool promotes sustainable energy management.