About Calcly

What is Calcly?

Calcly is a collection of 70+ free online tools designed to help you with everyday tasks — from counting words and calculating percentages to generating QR codes and formatting JSON. Every tool runs 100% in your browser using JavaScript, which means your data never leaves your device.

Our Privacy Promise

We believe your data is yours. All processing happens locally in your browser. We don't collect, store, or transmit any of your data. There are no accounts, no tracking, no analytics cookies. The only data stored is your preferences (theme, favorites, recent tools) in your browser's localStorage — and you can clear that anytime.

No Login Required

Just open a tool and start using it. No signup, no email verification, no credit card. Every tool is completely free with no usage limits.

Built With

Calcly is built with Astro for static site generation, vanilla JavaScript for tool logic, and deployed on Cloudflare Pages for lightning-fast global delivery. The only external libraries used are QRCode.js and JsBarcode for their respective tools.