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…
⚡ 100% Free Online Tools & SaaS Utilities
100% Free Online Tools for Developers, Creators & Students
Blazing-fast, client-side, privacy-first web utilities, network diagnostics, and AI productivity tools without signups or paywalls.
Featured
Popular
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…
Popular
Free Online Invoice Generator: Create & Download PDF Invoices Without Watermarks
Interactive Tool Launch Free Online Invoice Generator App 100% client-side privacy, instant PDF export, multi-currency & tax presets.…
Free Tool
Zero-Server Micro-SaaS: How to Build High-Performance Browser Utilities with WebAssembly, Web Workers, and Canvas API
Discover how to architect lightning-fast, privacy-first web utilities and Micro-SaaS without servers. Deep dive into WebAssembly, Web Worker…
Financial
EMI Calculator: Calculate Loan Monthly Installment & Interest Breakdown
Health
BMI Calculator: Calculate Body Mass Index & Healthy Weight Range
Instant
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,…
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…
Free Tool
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
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
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…
Free Tool
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…
Why 99tools?
Engineered for Performance & Zero Friction
Most tool sites are cluttered with slow ads, forced signups, and trackers. 99tools is designed to be the exact opposite.
Instant Local Computation
Base64 encoders, subnet calculators, and formatters execute directly inside your browser with WebAssembly and native JS for zero server latency.
Guaranteed Data Privacy
Your sensitive tokens, passwords, and JSON payloads never touch external logging servers. What happens on your machine stays on your machine.
Modern AI & Agent Tools
Stay ahead of technological transitions with our curated Agentic AI guides, prompt visualizers, and autonomous productivity workflows.
Frequently Asked Questions
Everything you need to know about using 99tools and our SaaS solutions.
Are all tools on 99tools really 100% free?
Yes! All calculators, network diagnostics, and developer utilities are completely free to use for both personal and commercial projects without any subscription or credit card requirement.
Do you store or log the data I input into the tools?
No. We prioritize client-side execution. Formatters, Base64 decoders, hash generators, and calculators operate locally in your web browser. Network diagnostics (like WHOIS and Traceroute) only query public records without storing user input.
Can I request a new tool to be added?
Absolutely. Click the "Request a Tool" button in the footer or visit our contact page to suggest calculators, API tools, or SaaS utilities you would love to see.