Tool category
Utilities tools
Use a local scientific calculator for expressions and sampled graphs, measure browser-to-RizzKit network speed, or check the public IP and approximate network location supplied by external providers. QR, measurement, currency, and finance tools cover other everyday tasks. Check each tool's data use and limits before relying on a result.
Choose a focused utility below. Every tool page documents how to use it, where its data is processed, realistic limitations, and related workflows so you can make an informed choice before providing input.
Browse Utilities utilities
Scientific Calculator
Work through scientific expressions locally. Calculate powers, roots, logarithms, factorials, and trigonometry with an editable expression and degree or radian angles.
Internet Speed Test
Estimate transfer speed to the RizzKit server. Measure browser-to-server download and upload throughput and HTTP round-trip latency with an explicit, bounded network test.
IP Address Lookup
Check an IP address, approximate location, and network details. Automatically detect your public IPv4 or IPv6 address, or enter another address to view approximate FreeIPAPI location, ASN, and exact decimal details.
QR Code Generator
Design professional, scan-safe QR codes in your browser. Create branded QR codes for links, Wi-Fi, contacts, messages, events, and locations. Add logos, gradients, frames, reusable presets, and export PNG, SVG, or print-ready PDF.
EMI Calculator
Plan monthly loan payments with a full amortization schedule. Estimate a fixed-rate loan EMI, total interest, total repayment, and every monthly principal and interest payment directly in your browser.
Income Tax Calculator
Estimate income tax and take-home pay across 13 countries. Explore a transparent personal income-tax estimate with country-specific filing options, deductions, regional components, assumptions, rule-year labels, and official sources.
Common utilities tasks
- Calculate sin(30) in degrees and verify the result is 0.5
- Compare speed-test estimates and public IP before and after changing a VPN route
- Create a QR code for a URL, contact, or Wi-Fi network
- Convert measurements or estimate payments and reference-rate currencies
Relevant guides
- Compare a slow connection and a VPN route — Record your public exit address and bounded speed estimates before and after a route change without mistaking either for a diagnosis.
- Check angle modes, precedence, and graph estimates — Use exact input checks for arithmetic and trigonometry, then distinguish a sampled graph from a numeric answer.
- How to choose a document conversion workflow — Match the tool to the source, understand which structure can be retained, and verify a converted document before relying on it.
Utilities tools FAQ
Does a QR code hide its contents?
No. The payload is encoded for scanning and should be treated as visible information, not secure storage.
Are unit results perfectly exact?
Formulas use JavaScript floating-point arithmetic, so displayed results may be rounded.
Do utilities require an account?
No account is required to use the current utilities. Finance calculations stay in the browser; currency conversion requests the cached rate table from the RizzKit API.
Can a speed test or IP lookup pinpoint a network problem?
Not by itself. Speed measures a bounded browser-to-hosting-server route; IP lookup shows one observed exit address and approximate provider data. Compare repeated runs under similar conditions and check your router or ISP independently.