Built by one person.
Built to stay free.
The story, principles, and philosophy behind ArunBuild — fast, browser-based tools with zero trackers, no account walls, and zero server uploads.
Who Builds This, and Why
Built solo with an emphasis on utility & privacy
I'm Arun. I build every tool on this site myself — the code, the calculations, and the writing. I have an MBA in Finance and Marketing, which is where the interest in salary structure and tax comes from.
I built these because I hit the problems myself. I wanted to know what a job offer actually paid per month. I wanted to resize an image without making an account. Every tool I found wanted a login or a subscription first, so I wrote my own and put them here.
Everything is free. No signup, no watermark, no catch. There is no paid tier and nothing is held back.
Nothing you type leaves your browser. Every calculation runs on your device — your salary, your rent, your images are never uploaded anywhere, because there is no server doing the work. That is true of every tool here, and it is the point of the site. It also means there are no accounts, since there is nothing I need from you to make the tools work.
The ArunBuild Principles
100% Client-Side
Your calculations and media stay in browser RAM. Zero server uploads, zero remote tracking cookies, and zero database entries.
No Trackers or Signups
No email forms, no password requirements, no premium subscription gates, and no watermarks placed on exported files.
Fast & Free Forever
Statically compiled HTML served from edge CDNs. With 0ms server computation cost, tools stay completely free to run.
Tech Stack & Transparency
Built with modern web standardsArunBuild relies on statically prerendered Next.js App Router, React, TypeScript, and Tailwind CSS. Computation executes through native HTML5 Canvas, Web Speech, and Web Workers.
Have a Tool Request or Bug Report?
Need a tool that doesn't exist yet or spotted a number that looks wrong? Get in touch directly — no bots or support tickets.