Products & Tools I've Built
Live SaaS apps and AI tools I designed, built, and deployed end-to-end. Each one has its own terms — open it to see what applies. Need something custom? Let's talk.
Products & Tools
Everything below is live and maintained by me. Some need a sign-up, and pricing varies by tool.
GameHub 3D
Browser-native 3D games that start in one click — drift a canyon, stack a tower, race a ghost. No download, no signup, no launcher.
Bulk QR Code Generator
Paste a list of URLs or import a CSV and instantly generate QR codes in bulk — customize colors, add a logo, and download all as a ZIP.
MD to PDF
Convert Markdown to a professional PDF document with formatting and styling options.
AirCare India — Live AQI Checker
Check real-time air quality index for 800+ Indian cities — get PM2.5 breakdowns, 24h trend charts, and AI-powered health tips based on your planned activity.
SEO Groww — Free SEO & AI Search Tools
A single workspace for SEO and AI-search visibility — check whether ChatGPT, Claude and Perplexity can cite your pages, crawl your whole site, audit 100 URLs at once, and generate meta tags, schema and sitemaps.
Frequently Asked Questions
What to expect before you open a tool.
Are these tools free?
It depends on the tool. Some are free to use, some are ad-supported, and others run on a subscription or credit-based plan. Each tool states its own terms — open it to see what applies.
Do I need an account to use them?
Some tools work straight away with no sign-up. Others need an account so your data, history, or credits can be saved to you. The tool will tell you before you start.
Who builds and maintains these?
I do — Niraj Kumar. Each one is designed, built, deployed, and maintained by me end-to-end. They are live products, not demos or screenshots.
Something is broken — can I report it?
Yes, please do. Send me a note through the contact page with the tool name and what happened, and I'll look into it.
Can you build something like this for me?
Yes. If you need a SaaS product, AI tool, or automation built from scratch, or a variation of one of these, go to the contact page and tell me what you have in mind.
Need a Custom Product?
Have an idea for a SaaS, AI tool, or automation system? I'll design and build it from scratch to fit your exact requirements.