More Free Online Utilities & Specialty Tools
Explore Linkenza's extended collection of free online tools, including the popular Palworld breeding calculator, WHOIS domain age checker, BMI health metrics, developer generators, and document converters.
Palworld Breeding Calculator (2026)
Calculate optimal Pal combos, reverse parent lookups, and multi-step breeding chain routes with Sakurajima DLC support.
Domain Age & WHOIS History Checker
Lookup website registration age, ICANN RDAP creation records, expiration countdowns, and SEO domain trust scores.
BMI & Daily Calorie Calculator
Calculate Body Mass Index (BMI), healthy target weight ranges, and total daily energy expenditure (TDEE) based on WHO standards.
Chronological Age Calculator
Calculate your exact age in years, months, weeks, and days with next birthday countdown reminders.
Age in Seconds Live Calculator
Answer 'how many seconds have I lived' with a real-time ticking live second counter.
PDF to Image Converter (JPG/PNG)
Extract high-resolution JPG or PNG images from PDF pages with 100% client-side privacy.
GitHub README Profile Studio
Build professional developer GitHub profile READMEs with dynamic tech stack badges and GitHub stats widgets.
3D WebAR Augmented Reality Studio
Preview and position 3D GLTF/GLB models directly in mobile web augmented reality.
Device Mockup Studio
Wrap screenshots into realistic 3D iPhone, MacBook, and desktop device mockup frames.
Guess Battle Trivia Challenge
Test your intuition and speed in interactive number and word estimation trivia battles.
Social Viral Engagement Simulator
Simulate social media post engagement curves, impression velocity, and viral algorithm distribution.
Business Valuation & EBITDA Suite
Calculate company valuation multiples, customer acquisition cost (CAC), and customer lifetime value (LTV).
Residential Lease & Rent Agreement Maker
Draft standard residential lease templates with customized rent, deposit, and term clauses. Template only, not legal advice.
Freelance Service Contract & NDA Generator
Draft freelance consulting agreements and non-disclosure agreements with digital canvas signing. Template only, not legal advice.
Got Questions About Specialty Online Tools?
Everything you need to know about functionality, security, and usage.