About wai-tools

wai-tools is a free collection of online tools built to make everyday tasks faster — from converting units and crunching numbers to compressing and resizing images or working with PDF files. Every tool is completely free, with no hidden costs, no sign-up, and nothing to install.

We believe good tools should be simple, fast, and privacy-respecting. That's why everything is designed to run directly in your browser — quick to load, easy to use, and available in both Thai and English.

What we offer

• Unit converters — length, weight, temperature, area, volume, speed, and data storage
• Calculators — percentage, discount, BMI, age, date difference, loan, VAT, tip, and compound interest
• Image tools — compress, resize, crop, rotate, and convert image files (JPG, PNG, WebP)
• PDF tools — merge, split, compress, convert PDF to image, and image to PDF

Why choose wai-tools

• 100% free — use every tool, with no limits and no account required
• Private and secure — your images and PDFs are processed in your browser and never uploaded to a server
• Fast — pages load quickly and work instantly on desktop, tablet, and mobile
• Bilingual — full Thai and English support on every page

How it works

wai-tools image and PDF tools run fully client-side, meaning all processing happens on your own device. Your files never leave your browser, so you can use them with confidence — even for sensitive documents.

Frequently asked questions