Free Online Tools
Fast, free calculators and converters that run right in your browser — no signup, no installs.
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Why Use TechGeekBuzz Tools?
Every tool here is built to be fast, private, and genuinely useful — no clutter, no paywalls, no accounts.
Completely Free
Every calculator and converter is free to use, with no hidden limits or premium tiers.
Runs In Your Browser
Most tools calculate and convert entirely on your device — nothing to install, nothing to wait for.
Fast & Lightweight
Built with lightweight, modern web tech so results appear instantly, even on slower connections.
Mobile Friendly
Every tool is designed mobile-first, so it works just as well on your phone as on your desktop.
Frequently Asked Questions
Yes. Every tool on this page is completely free, works instantly in your browser, and doesn't require an account or signup.
No installation is needed. Each tool runs directly in your web browser on any device — desktop, tablet, or mobile.
Most calculations and conversions run entirely on your device. Where a tool needs to check an external resource, such as the broken links checker, only the information required to perform that check is used.
We regularly add new calculators and converters based on what developers and readers ask for. Check back on this page or explore the category filters above to see what's new.