About ZestLab

What We Offer

ZestLab is a collection of 90+ free online tools designed to make your daily tasks easier. From developer utilities and calculators to file converters, trending topic explorers, and browser games — we have something for everyone.

• Developer tools — JSON formatters, encoders, decoders, and more
• Calculators — age, percentage, unit conversions
• File tools — PDF merge/split, image converters, video tools
• Trends — explore what is trending across the web
• Browser games — fun games you can play right in your browser

Privacy First

Your privacy matters to us. All of our tools run entirely in your browser. We do not upload your files to any server. Your data stays on your device, and nothing is stored or shared. No signup is required to use any of our tools.

Free and Accessible

Every tool on ZestLab is completely free to use with no limitations. We believe useful tools should be accessible to everyone, everywhere. No install, no signup — just open and use.