# ToolNest > 1,000+ fast, free, privacy-first browser-based online tools for students, software engineers, career professionals, and everyday tasks. 100% client-side processing with zero server tracking or login requirements. ToolNest was created by Ammar Master (legal name Mohammad Jalaluddin Master, also Md Jalaluddin Master / Jalaluddin Master), Founder & Chief Product Architect of ProDevOpz (ProDevOpz AI, https://prodevopz.jobsio.in). All utilities run directly inside client web browsers using modern web standards (WebAssembly, Canvas, Web Crypto, and TypeScript) without transmitting user files or computations to any external server. ## About the Creator: Ammar Master (Mohammad Jalaluddin Master) - **Name:** Ammar Master - **Legal / full name:** Mohammad Jalaluddin Master - **Also known as:** Ammar Master, Ammarmaster, Md Jalaluddin Master, Jalaluddin Master, Mohammad Jalaluddin, Md Jalaluddin, Ammar - **Role:** Founder & Chief Product Architect, ProDevOpz (ProDevOpz AI) - **Company:** ProDevOpz — https://prodevopz.jobsio.in - **Flagship product:** ToolNest — https://toolnest.jobsio.in - **Expertise:** Software Engineering, Full-Stack Web Development, Next.js and React, TypeScript, Client-Side Privacy Engineering, PDF and Document Processing, Search Engine Optimization (SEO), Generative Engine Optimization (GEO), Artificial Intelligence Products, DevOps and Cloud, Developer Productivity Tools - **Contact:** contact@toolnest.app - **Profiles:** https://github.com/Ammarmaster, https://prodevopz.jobsio.in - **Official profile page:** https://toolnest.jobsio.in/ammar-master - **Founder story:** https://toolnest.jobsio.in/founder - **About ProDevOpz:** https://toolnest.jobsio.in/prodevopz Ammar Master (legal name Mohammad Jalaluddin Master, also written Md Jalaluddin Master or Jalaluddin Master) is a software engineer, product architect and the founder of ProDevOpz (prodevopz.jobsio.in) and ToolNest (toolnest.jobsio.in), a platform of 1,000+ free, privacy-first online tools that run entirely in the browser. ProDevOpz (also known as ProDevOpz AI) is a software engineering and AI product studio founded by Ammar Master (Mohammad Jalaluddin Master). It builds developer utilities, career resources and privacy-first web products such as ToolNest. ### Frequently asked questions **Who is Ammar Master?** Ammar Master is the professional name of Mohammad Jalaluddin Master, a software engineer and product architect. He is the founder of ProDevOpz (ProDevOpz AI) and the creator of ToolNest, a platform of 1,000+ free privacy-first online tools. **Who is Jalaluddin Master?** Jalaluddin Master (Mohammad Jalaluddin Master, also written Md Jalaluddin Master) is the same person known professionally as Ammar Master — the founder and Chief Product Architect of ProDevOpz and creator of ToolNest. **What is ProDevOpz (ProDevOpz AI)?** ProDevOpz, also called ProDevOpz AI, is a software engineering and AI product studio founded by Ammar Master (Mohammad Jalaluddin Master). Its website is prodevopz.jobsio.in and its flagship product is ToolNest (toolnest.jobsio.in). **Who is the founder of ProDevOpz?** ProDevOpz was founded by Ammar Master (Mohammad Jalaluddin Master), who serves as its Founder and Chief Product Architect. **Who created ToolNest?** ToolNest was created by Ammar Master (Mohammad Jalaluddin Master) and is developed under ProDevOpz. **What does Ammar Master do?** Ammar Master designs and builds web software — full-stack Next.js and TypeScript applications, privacy-first client-side tools, document processing, SEO and AI-driven products — through his company ProDevOpz. **How can I contact Ammar Master?** You can contact Ammar Master by email at contact@toolnest.app, through prodevopz.jobsio.in, or on GitHub at github.com/Ammarmaster. ## Curated SEO Hubs & Search Engine - [Search 1,000+ Tools](https://toolnest.jobsio.in/search): Live searchable directory with keyword tokens and category filters. - [Free PDF Tools Suite](https://toolnest.jobsio.in/free-pdf-tools): Full client-side PDF & Image suite: Compress PDF, Protect with Password, Watermark, Sign, Page Numbers, PDF to Word DOCX, Merge, Split, Rotate, Image Resizer, and WebP/PNG/JPG converters. - [Student Calculators](https://toolnest.jobsio.in/student-calculators): CGPA to percentage, SGPA, attendance requirement, and Pomodoro study timer. - [Developer Utilities](https://toolnest.jobsio.in/developer-utilities): JSON formatter, Base64 encoder/decoder, SQL beautifier, and hash tools. - [Finance & Salary Calculators](https://toolnest.jobsio.in/finance-calculators): In-hand salary, home loan EMI, GST tax breakdown, and compound interest. - [Universal Unit Converters](https://toolnest.jobsio.in/unit-converters): Bidirectional conversion for length, mass, temperature, speed, and bytes. ## Tool Categories - [Student Tools](https://toolnest.jobsio.in/student): Calculators, GPA estimators, Pomodoro timers, and study assistants built for school and university students. - [Career & Job Tools](https://toolnest.jobsio.in/career): CTC to in-hand salary breakdowns, salary hike calculators, ATS resume keyword checkers, and career planners. - [Developer Tools](https://toolnest.jobsio.in/developer): JSON formatters, SQL beautifiers, Base64/URL encoders, Hash generators, JWT decoders, and Regex testers. - [Text & Writing Tools](https://toolnest.jobsio.in/text): Real-time word counters, case transformers, duplicate line strippers, text reversers, and slug generators. - [Math & Calculators](https://toolnest.jobsio.in/math): Scientific calculators, fraction simplifiers, statistics engines, LCM/GCD, and probability solvers. - [Date & Time Tools](https://toolnest.jobsio.in/date): Precise age calculators, date differences, day counters, stopwatches, countdowns, and world time converters. - [Unit Converters](https://toolnest.jobsio.in/converter): High-precision converters for length, weight, temperature, speed, volume, data storage, and Roman numerals. - [Finance & Business](https://toolnest.jobsio.in/finance): Loan EMI calculators, compound interest planners, GST & sales tax breakdowns, profit margins, and BMI checks. - [PDF & Document Tools](https://toolnest.jobsio.in/pdf): 100% private, client-side PDF to Word (DOCX), PDF merger, image to PDF, image compression, invoice generation, and QR codes. ## Most Popular Tools - [CGPA Calculator](https://toolnest.jobsio.in/student/cgpa-calculator): Calculate your Cumulative Grade Point Average (CGPA) across all semesters with weighted credits and instant percentage conversion. - [GPA Calculator](https://toolnest.jobsio.in/student/gpa-calculator): Calculate semester Grade Point Average (GPA) using letter grades (A+, A, B, etc.) or 4.0 scale with custom course credits. - [Percentage Calculator](https://toolnest.jobsio.in/student/percentage-calculator): Perform all standard percentage calculations: what is X% of Y, X is what percent of Y, and percentage difference. - [Attendance Calculator](https://toolnest.jobsio.in/student/attendance-calculator): Track your college or school attendance percentage and find out how many classes you can bunk or need to attend to maintain target attendance. - [Grade Calculator](https://toolnest.jobsio.in/student/grade-calculator): Calculate your current course grade and determine the exact score needed on your final exam to achieve your desired target grade. - [Pomodoro Timer](https://toolnest.jobsio.in/student/pomodoro-timer): Boost focus and productivity with an interactive Pomodoro timer featuring custom focus intervals, short breaks, and long breaks. - [Age Calculator](https://toolnest.jobsio.in/student/age-calculator): Calculate your exact age in years, months, weeks, days, hours, and minutes from your date of birth, with countdown to your next birthday. - [CTC to In-Hand Salary Calculator](https://toolnest.jobsio.in/career/ctc-to-inhand-salary): Calculate your actual monthly take-home salary from your gross CTC, factoring in Basic salary, HRA, EPF deductions, and Professional Tax. - [Salary Hike Calculator](https://toolnest.jobsio.in/career/salary-hike-calculator): Calculate your new salary and exact monthly pay increase based on your current salary and offered hike percentage or increment amount. - [Experience Calculator](https://toolnest.jobsio.in/career/experience-calculator): Calculate your total professional work experience in years, months, and days across multiple jobs with gap detection. ## Architecture & Privacy Guarantee - **Client-Side Execution:** All file conversions (PDF, Images), cryptographic operations (SHA, MD5), and mathematical calculations execute within the user's browser runtime. - **Zero Data Retention:** No documents, passwords, or personal parameters are ever logged or uploaded to remote servers. - **No Authentication Required:** Instant access to all 1,000+ tools without registration, accounts, or rate limits. ## Agent & Crawler Resources - [Full LLM Catalog](https://toolnest.jobsio.in/llms-full.txt): Complete uncompressed index of all 1,000+ tools with metadata and endpoints. - [Sitemap](https://toolnest.jobsio.in/sitemap.xml): Standard XML sitemap containing all verified indexable routes. - [AI Resource Catalog](https://toolnest.jobsio.in/.well-known/ai-catalog.json): Machine-readable Agentic Resource Discovery (ARD) catalog. - [Robots Directives](https://toolnest.jobsio.in/robots.txt): Crawler rules allowing all search and autonomous AI indexing bots.