Every tool on ToolsByValhalla is free, works instantly in your browser and needs no account. Pick a category below, or read our guides to understand the maths behind the calculators.
AI Tools
Write professional text in seconds with AI.
AI LinkedIn Summary Generator
Write a first-person LinkedIn About section from your role and skills.
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AI Instagram Caption Generator
Captions and hashtags for any photo, reel or product post.
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Finance Tools
Plan loans, savings, salary and retirement.
Loan Repayment Calculator
Monthly payment, total interest and total cost of a loan.
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Compound Interest Calculator
How a lump sum grows with compounding.
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Salary After Tax Calculator
Net pay per year, month, week and day.
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Retirement Savings Calculator
Projected savings vs. the nest egg you need.
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Everyday Calculators
Dates, times, percentages and health.
Age Calculator
Exact age in years, months and days.
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Date Difference Calculator
Days, weeks and months between two dates.
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Time Duration Calculator
Hours and minutes between two times, including overnight.
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Percentage Increase Calculator
Percentage change between two numbers.
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BMI Calculator
Body Mass Index in metric or imperial units.
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Generators
Random, secure and fictional data.
Password Generator
Strong random passwords, generated securely in your browser.
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Username Generator
Usernames for gaming, social media and work.
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Fake Name Generator
Fictional identities with safe test data.
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Random Number Generator
Random numbers in any range for draws and games.
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How our tools work
- Private by design: calculators and generators run locally in your browser, so the numbers and text you enter are not sent to our servers.
- AI tools: the LinkedIn and Instagram generators send only the details you type to an AI service to write your text, and we do not store them.
- Transparent formulas: each tool page explains the formula or method it uses, with a worked example you can check by hand.
- Free forever: the site is supported by advertising, so every tool stays free and unlimited.
Missing a tool?
We add new tools regularly. If there is a calculator or generator you would like to see, tell us on the contact page.