Blazing-fast, client-side, privacy-first web utilities, network diagnostics, and AI productivity tools without signups or paywalls.
JSON formatters, Base64 converters, JWT analyzers, URL encoders, and hash generators. 100% private in-browser computation.
PPF calculation, CAGR, compound interest, SIP growth, and loan EMI schedules with interactive charts.
Live traceroute maps, DNS propagation inspection, SSL certificate analyzers, simulated port checks, and bandwidth estimators.
Spacebar color generator (10 colors), live real-world UI mockups, photo color extractor, WCAG 2.1 contrast matrix, and Tailwind scales.
Most tool sites are cluttered with slow ads, forced signups, and trackers. 99tools is designed to be the exact opposite.
Base64 encoders, subnet calculators, and formatters execute directly inside your browser with native JS for zero server latency.
Your sensitive tokens, passwords, and JSON payloads never touch external logging servers. What happens on your machine stays on your machine.
Stay ahead of technological transitions with our curated Agentic AI guides, prompt visualizers, and autonomous productivity workflows.
Everything you need to know about using 99tools and our SaaS solutions.
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.
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.
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.
