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Age Calculator: Calculate Exact Age in Years, Months, Days & Next Birthday
\\n Need to know your exact age down to the day for competitive exams, passport verification, insurance policies,…
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Interactive Online Tools & Utilities
Explore our suite of client-side web tools for freelancers, developers, accountants, and network administrators. Zero tracking, zero server storage, and zero signups required.
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Agentic AI: How Autonomous AI Agents Are Redefining Productivity in 2025
Introduction I’ve been keeping a close eye on how AI is transitioning from a reactive tool to a…
Free Tool
Bandwidth Calculator: Estimate Download & Upload Time Easily
Have you ever wondered how long it will take to download a movie, upload a file, or back…
Free Tool
Base64 Encode/Decode Tool: Easily Convert Strings Online
If you’ve ever dealt with data transfer, file handling, or web development, you’ve likely come across Base64 encoding.…
Health
BMI Calculator: Calculate Body Mass Index & Healthy Weight Range
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DNS Lookup Tool: What It Is and How to Use It
When you type a website address into your browser, magic happens in the background to take you to…
Financial
EMI Calculator: Calculate Loan Monthly Installment & Interest Breakdown
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Free Invoice Generator: Create & Download PDF Invoices
Professional Invoicing Made Simple, Private, and Instant The 99tools Free Online Invoice Generator is an interactive, browser-based billing…
ATS Optimized
Free Resume Builder: ATS-Friendly Professional CV Maker
Create ATS-Compliant, Job-Winning Resumes in Minutes The 99tools Free Online Resume Builder is an interactive, browser-based CV designer…
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HTTP Header Checker – View Server Response Headers Online
Every time you visit a website, your browser and the server exchange hidden bits of information called HTTP…
Taxes
Income Tax Calculator: Compare Old vs New Tax Regimes (India FY 2025-26)
\\n Choosing between the New Tax Regime and the Old Tax Regime can significantly impact your annual take-home…
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IP Finder Tool – Instantly Find Your IP Address
Welcome to 99tools.in’s IP Finder Tool — your go-to solution for instantly checking your public IP address online.…
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Port Scanner (Simulated): What It Is, When To Use It & How It Works
When you run services on a server—websites, game servers, remote desktops, or mail servers—those services listen on network…
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SSL Certificate Checker – Verify SSL Status, Expiry & Chain Online
In today’s internet, SSL certificates are no longer optional—they’re essential. From search engine rankings to user trust, SSL…
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Subnet Calculator: Easily Calculate Network ID, Broadcast, and Host Range
Subnetting is a term you may have heard of if you’ve ever set up IP addresses or managed…
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Traceroute Visualizer: Trace the Packet Path from Source to Destination
When you access a website or server, your request doesn’t travel in a straight line. It hops across…
Free Tool
What Is a Port Checker and How Does It Work? Beginner’s Survival Guide
Alright, let’s get real—if you’ve ever smashed your head against the wall trying to get your game server…
Free Tool
🕵️ Whois Lookup: Check Domain Registration Details in Seconds
Ever wondered who owns a domain name, when it was registered, or when it’s set to expire? That’s…
Engineered for Absolute Speed & Privacy
Why millions of professionals rely on 99tools browser-based utilities every month.
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100% Client-Side Execution
Your invoices, calculations, passwords, and sensitive keys never touch external servers. Everything runs entirely inside your browser sandbox.
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Zero Latency & No Signups
No paywalls, no credit cards, and no account creation. Open the tool, get the job done in seconds, and export your files watermark-free.
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Print & Vector Ready
Export high-resolution vector PDFs, standard JSON configurations, or verified network reports ready for corporate audits.