Convert units, files and data instantly with 8 free online converters at zaerp.com. Each tool runs entirely in your browser with zero external dependencies — no JavaScript libraries, no server uploads. Files you select are processed locally using the browser's File API, so your data never leaves your device.
The unit converter alone covers 16 categories (length, weight, temperature, area, volume, speed, data storage, time, pressure, angle, energy, power, density, fuel, frequency, force) with real-time conversion across all units.
For sensitive operations like password generation or QR decoding, running client-side is critical — your inputs never touch a server.
Yes. All 8 converter tools are 100% free with no signup or install. Each tool runs entirely client-side in your browser.
No. Images, PDFs and other inputs are processed locally in your browser using the File API and Canvas. Your files never leave your device.
Image Compressor supports JPG, PNG and WebP. PDF Tool converts images to PDF. QR Decoder reads QR codes from JPG/PNG images.