Abu Sufyan

Full-Stack Developer & Founder · WebToolkit Pro

He builds the tool he couldn't find — then makes it free for everyone else.

I build fast, SEO-friendly web apps that actually work — no bloat, no friction, no wasted data. My products are used by thousands of developers, HR managers, and engineers worldwide. If you need something built right, I'm available for freelance and contract work.

Let's work together View full site →

150+ free tools built

85,600+ files processed

30+ countries in Severance Calculator

Featured on Product Hunt

About

I'm a Full-Stack Developer and indie maker studying Computer Science at Lahore Leads University. My work starts with a real frustration — messy JSON tools that log your data, severance calculators that demand your email, trade conversion tables buried in PDFs — and ends with the cleanest, fastest solution I can ship.

WebToolkit Pro started as 12 tools. It grew to 150+ on word of mouth alone. I also work full-stack at Netizen Labs and now I'm taking on freelance clients — if you need a web app that loads fast, ranks well, and doesn't frustrate its users, that's exactly what I do.

Stack

React.js Next.js Node.js Laravel Python PostgreSQL Tailwind CSS Technical SEO AWS Vercel Firebase REST APIs

Work

Things I've built and shipped

WebToolkit Pro ↗

150+ client-side developer tools — JSON formatter, Base64, password generator, UUID, and more. All browser-only, zero data logging. 85,600+ files processed. Featured on Product Hunt.

ReactClient-SidePrivacy-First

Severance Calculator ↗

Global severance pay calculator covering 30+ countries with official 2026 labor law formulas. Built in a weekend. Now used daily by HR managers from Karachi to London — with no email gate.

Next.jsHR ToolsGlobal

TradeConvert ↗

NIST-verified unit conversion tools for building trades — plumbing, HVAC, electrical (NEC), concrete, lumber. Mobile-first, works with gloves on. For contractors and engineers on job sites.

Mobile-FirstEngineering

CrawlScope ↗

AI crawler audit dashboard that simulates how GPTBot, Anthropic, and other AI scrapers see your site. Checks robots.txt defenses. Built for technical SEOs managing AI indexing.

Technical SEOAI

SLA Breach Calculator ↗

Instantly calculates uptime shortfalls, financial penalties, and service credits for B2B IT contracts. For procurement teams and IT managers who need answers without complex spreadsheet formulas.

IT / ProcurementB2B

QueryPerf ↗

Database query performance analysis tool for developers. Helps analyze and optimize SQL queries to reduce load times and improve application efficiency.

PostgreSQLDeveloper Tools

Experience

Founder & Full-Stack Developer

2023 – Present

WTKPro (WebToolkit Pro)

Founded and built WebToolkit Pro — a suite of 150+ client-side developer tools that run entirely in the browser with zero data logging. Serves thousands of developers daily. Processed 85,600+ files. Featured on Product Hunt.

Full-Stack Developer

Present

Netizen Labs

Building web applications with a focus on performance, clean architecture, and SEO across React, Node.js, PHP/Laravel, and Python. Bringing the same user-first mindset from indie products to client work.

What I build for clients

Fast, SEO-friendly web apps. Built to ship.

Web Applications

Full-stack React/Next.js apps with Node, Laravel, or Python backends. Clean code, well-documented, ready for production.

Developer & Business Tools

Calculators, converters, dashboards, and workflow tools. Proven track record — I've shipped six of my own to thousands of daily users.

SEO-Optimized Sites

Technical SEO, Core Web Vitals, JSON-LD schema, and performance-first architecture baked in from the start — not bolted on after.

Get in touch

Ready to build something?

I'm currently open to freelance and contract work. If you need a web app that performs, ranks, and genuinely helps its users — let's talk.

contact@abusufyan.xyz abusufyan.xyz ↗