Calculate networks, generate strong passwords, decode data, validate JSON, inspect hashes, and investigate web logs. Simple, fast utilities designed for IT professionals and curious minds.
Find the right tool for the task. 52 tools across 5 categories: security, finance, health, math, and everyday calculators.
Network, broadcast, usable host range and masks.
Convert prefix lengths and subnet masks.
Create strong random passwords on-device.
Encode or decode UTF-8 text.
Summarize Apache and Nginx access logs.
Format and validate JSON documents.
Encode and decode URL components.
Compute SHA-256 for text locally.
Hash local files without uploading.
Generate random UUID v4 identifiers.
Convert Unix seconds and UTC dates.
Estimate password strength offline.
Convert IPv4 to decimal, hex and binary.
Count characters, words, lines and UTF-8 bytes.
Extract IPv4 addresses, domains and hashes.
Evaluate arithmetic expressions and powers.
Add, subtract, multiply and divide fractions.
Find a percentage of a number.
Generate a random integer within a range.
Calculate triangle area and perimeter.
Calculate mean and standard deviation.
Calculate age from a date of birth.
Find days between two dates.
Add minutes to a clock time.
Calculate elapsed work hours.
Calculate weighted GPA on a 4.0 scale.
Calculate your weighted grade percentage.
Estimate concrete volume in cubic meters.
Convert common length and mass units.
Monthly mortgage payment.
Loan repayment schedule.
Vehicle financing.
Simple interest.
Payment for a loan.
Savings projection.
Loan amortization summary.
Compound growth.
Future price estimate.
Future value of lump sum.
Illustrative progressive tax.
Compound growth.
Gross pay estimate.
Implied annual loan APR.
Add sales tax.
Body mass index.
Estimated daily calories.
US Navy circumference estimate.
Resting calorie estimate.
Hamwi reference estimate.
Running pace.
Estimated due date from LMP.
Estimated due date from conception.
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Tool inputs are processed in your browser; this toolkit does not upload them.
Lightweight utilities without account registration or paid APIs.
Useful for networking, troubleshooting, and everyday security tasks.
A practical home for cybersecurity, networking, and developer utilities. Whether you are learning subnetting, troubleshooting an application, or reviewing web server logs, YARVICO helps you get useful results without complicated setup.
Our mission is to make essential technical utilities accessible, understandable, and free for students, developers, network administrators, and security professionals.
29 working browser-based tools, with financial and health calculators planned next.
Explore the toolkit ↗Tool calculations run in your browser without an application-server upload. Avoid entering secrets into any website you do not trust.
Focused interfaces help you complete common calculations and conversions with minimal steps.
Access the toolkit without creating an account, purchasing a subscription, or installing software.
Practice networking concepts, explore encodings, and build confidence with practical security tasks.
Responsive layouts adapt to desktops, laptops, tablets, and smartphones.
From IP subnet calculations to JSON formatting and log analysis, find common IT tasks in one place.
YARVICO brings networking calculators, password and hashing utilities, developer helpers, and basic SOC analysis tools together. We aim to improve the toolkit over time and publish practical cybersecurity resources alongside it.
Results are educational and informational, not a substitute for professional security review. Independently verify critical calculations and findings before applying them to production systems.
Uses the browser Web Crypto API. Passwords are not sent to a server by this tool.
Base64 is encoding, not encryption. Never use it to protect secrets.
Basic heuristic analysis only, not intrusion detection. Log text is processed locally by this tool; avoid pasting sensitive personal data into any untrusted website.
Encodes URL components, not entire URLs.
Uses Web Crypto in secure browser contexts. SHA-256 is not password encryption.
File contents stay in your browser. A 25 MB limit helps protect low-memory devices.
Local, approximate heuristics only; not a breach check or proof of security. Avoid entering real sensitive passwords into unfamiliar sites.
Extraction only; indicators are not verified as malicious. Inputs are not submitted to a threat intelligence service.
Evaluate arithmetic expressions and powers.
Add, subtract, multiply and divide fractions.
Find a percentage of a number.
Generate a random integer within a range.
Calculate triangle area and perimeter.
Calculate mean and standard deviation.
Calculate age from a date of birth.
Find days between two dates.
Add minutes to a clock time.
Calculate elapsed work hours.
Calculate weighted GPA on a 4.0 scale.
Calculate your weighted grade percentage.
Estimate concrete volume in cubic meters.
Convert common length and mass units.
Monthly mortgage payment. Estimates only; check assumptions before making decisions.
Loan repayment schedule. Estimates only; check assumptions before making decisions.
Vehicle financing. Estimates only; check assumptions before making decisions.
Simple interest. Estimates only; check assumptions before making decisions.
Payment for a loan. Estimates only; check assumptions before making decisions.
Savings projection. Estimates only; check assumptions before making decisions.
Loan amortization summary. Estimates only; check assumptions before making decisions.
Compound growth. Estimates only; check assumptions before making decisions.
Future price estimate. Estimates only; check assumptions before making decisions.
Future value of lump sum. Estimates only; check assumptions before making decisions.
Illustrative progressive tax. Estimates only; check assumptions before making decisions.
Compound growth. Estimates only; check assumptions before making decisions.
Gross pay estimate. Estimates only; check assumptions before making decisions.
Implied annual loan APR. Estimates only; check assumptions before making decisions.
Add sales tax. Estimates only; check assumptions before making decisions.
Body mass index. Estimates only; check assumptions before making decisions.
Estimated daily calories. Estimates only; check assumptions before making decisions.
US Navy circumference estimate. Estimates only; check assumptions before making decisions.
Resting calorie estimate. Estimates only; check assumptions before making decisions.
Hamwi reference estimate. Estimates only; check assumptions before making decisions.
Running pace. Estimates only; check assumptions before making decisions.
Estimated due date from LMP. Estimates only; check assumptions before making decisions.
Estimated due date from conception. Estimates only; check assumptions before making decisions.
Select a tool above to open its calculator.
A hands-on scientific calculator with trigonometry, powers, roots, logarithms, factorials and degree/radian modes. Tap the keys or use your keyboard. Calculations run locally in your browser.
For learning and everyday calculations. Independently verify critical results.
Yes. YARVICO provides this calculator without requiring an account.
Check the tool-specific limitations above. Verify important results against trusted independent references.
No. This tool runs in a modern web browser.
Find your network address, broadcast address, subnet mask, wildcard mask and usable IP range. Free, fast and processed locally in your browser.
Enter an IPv4 address and a CIDR prefix from /0 to /32.
Your address is calculated on this device. No IP lookup or server request is made.
An IPv4 subnet calculator determines the network boundaries of an IP address and CIDR prefix. It helps network administrators, cybersecurity analysts and students plan address ranges and check routing configurations.
192.168.1.100.24.The /24 prefix means that 24 bits identify the network and 8 bits remain for addresses. The subnet mask is 255.255.255.0, the network is 192.168.1.0, and the broadcast address is 192.168.1.255. For an ordinary subnet, the usable range is 192.168.1.1 through 192.168.1.254, or 254 host addresses.
It specifies 24 network bits in a 32-bit IPv4 address. That leaves 256 total addresses, typically 254 usable host addresses.
It is the bitwise inverse of the subnet mask. For /24, the wildcard mask is 0.0.0.255.
A /31 is often used for point-to-point links under RFC 3021, with both addresses available as endpoints. A /32 represents one address, often used for host routes. These are not ordinary multi-host broadcast subnets.
No. It performs mathematical calculations in your browser and does not probe or connect to any IP address.
Educational reference only. Verify addressing and routing decisions against your actual network design.
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