About PK Toolbox

PK Toolbox is an independent website that builds simple, accurate tools for everyday money, paperwork and study questions. We started it because the information people need – tax slabs, tariffs, form requirements, grading rules – is often spread across long notifications and PDFs, and most existing tools either show outdated numbers or ask you to upload private documents to unknown servers.

What we believe

• Show the working. Every calculator explains its formula and includes a worked example, so you can check the result yourself.
• Keep documents private. Our photo, signature and PDF tools run entirely inside your browser. We never receive your files.
• Stay current. Rates are reviewed when budgets, tariff notifications or official rules change. Each page shows when it was last reviewed.
• Free for everyone. The site is supported by advertising so the tools can stay free without sign-ups.

Our tools

We currently offer 14 tools:

• Salary Income Tax Calculator
• Business Income Tax Calculator
• Electricity Bill Calculator
• Zakat Calculator
• Photo Resizer for Forms
• Signature Resizer
• Image Compressor (to KB)
• CNIC Front & Back on One Page
• JPG to PDF
• Merge PDF
• GPA & CGPA Calculator
• Aggregate Calculator
• Marks Percentage Calculator
• Age Calculator for Jobs

Accuracy

We take care to use official sources, but laws and rates change and individual situations differ. Our results are estimates for guidance. Please read our disclaimer, and if you spot a mistake, tell us – we fix reported errors quickly.