100% free · runs in your browser · no signup
Everyday tools, done in seconds.
53 free calculators, converters and generators for money, health, study, text, images and code.
- 53 free tools
- Nothing uploaded
- No signup needed
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Finance Calculators
11 tools- Loan EMI Calculator
- Mortgage Calculator
- Compound Interest Calculator
- Simple Interest Calculator
- Salary After Tax Calculator
Everyday Calculators
5 tools- Age Calculator
- Percentage Calculator
- Date Difference Calculator
- Days Until Calculator
- Unit Converter
Developer & Web Tools
11 tools- JSON Formatter & Validator
- Base64 Encode / Decode
- URL Encode / Decode
- Regex Tester
- Meta Tag Generator
Why ToolNook
Quick, careful and private
Small tools deserve the same care as big products. Here is what you can count on, on every page.
- Step 1: Find a toolSearch by name or task, or browse a category.
- Step 2: Enter your detailsType or paste your values. Results update instantly.
- Step 3: Use the resultCopy it, download it, or read the worked explanation below.
Instant results
Answers update as you type. No submit buttons and no page reloads.
Private by design
Everything runs in your browser. Your numbers, text and photos are never uploaded.
Accurate and tested
Published formulas, explained on every page and checked by automated tests.
Built for everyone
Metric and imperial units, any currency and clear international date formats.
No signup, ever
No accounts, no email walls and no usage limits. Open a tool and use it.
Fast on any device
Each page loads only its own tool, so it opens quickly even on a slow phone.
FAQ
Questions, answered
Can't find what you need? Get in touch. We usually reply within two working days.
Frequently asked questions
Are the tools on ToolNook really free?
Yes. Every tool is free to use with no signup, no trial and no usage limits. The site is supported by a small number of clearly labeled ads that are kept away from the tools themselves.
Do you upload or store the data I enter?
No. The calculators, text tools, developer tools and image tools all run in JavaScript inside your browser. Your numbers, text and images are processed on your device and are never sent to our servers.
How accurate are the calculators?
Each calculator uses a standard, published formula, which is explained on its page, and the calculation code is covered by automated tests. Financial, tax and health results are still estimates, so confirm important decisions with a professional.
Can I use the tools on my phone?
Yes. Every page is designed mobile-first and works in any modern browser on phones, tablets and desktops. Once a page has loaded, most tools keep working even if your connection drops.
Do I need to install anything?
No. There is nothing to download or install. Open a tool and start typing; results appear instantly.
Can I suggest a new tool or report a problem?
Please do. Use the contact page to suggest a tool, report a bug or point out a mistake. We read every message and use the feedback to decide what to build next.