Empowering Millions with Fast, Free & Private Tools
99tools is an independent, high-performance suite of web utilities, network diagnostics, financial calculators, and AI productivity tools. Engineered for speed, radical privacy, and zero friction.
15+ Active Tools
Production-ready free calculators & utilities
100% Client-Side
Zero data storage or tracking cookies
0s Friction
No signups, paywalls, or API keys needed
99.9% Uptime
LiteSpeed & Anycast CDN accelerated
Why We Built 99tools
Most modern online tools are bloated with heavy ads, subscription popups, and intrusive trackers. We built the exact opposite.
Lightning-Fast Speed
All calculators, CIDR masks, base64 operations, and telemetry run directly in your browser using modern client-side HTML5 APIs. Zero server round-trip latency.
Radical Privacy
We do not log your calculations, IP addresses, sensitive tax figures, or code conversions. What happens in your browser stays strictly in your browser.
Built for Modern Workflows
Designed with sleek dark mode, instant copy buttons, keyboard shortcuts (Cmd+K), and responsive mobile ergonomics for modern developers and AI power users.
100% Free Forever
No hidden trial periods, no subscription tiers, and no credit card gates. Every single tool and calculator is free for both personal and commercial use.
Crafted with Passion by Developers
99tools is actively maintained and continually expanded. Have an idea for a new calculator, developer utility, or network diagnostic tool? Send us a message and we will build it for you.
Get in Touch • Request a Tool