Free Online Tools & Calculators
Calculators, developer tools, converters & more — everything runs in your browser. Simple, powerful, and instantly ready.
157+
Free Tools
10
Categories
24/7
Available
Instant
Results
Every tool you need, in one place
157+ tools across 10 categories — explore calculators, developer tools, and more.
Calculators
31 tools31 free calculators — Scientific, BMI, Loan / EMI, Tip, Age, Percentage, and more.
Developer Tools
26 tools26 free developer tools — JSON Formatter, Regex, Base64, Hash, Diff, URL, and more.
Utility Tools
10 tools10 free utility tools — Calendar, Word & Character Counter, Text to Speech, Barcode, Emoji Picker, Random Number, and more.
Design Tools
16 tools16 free design tools — Color Palette, Favicon, Image Resizer, Box Shadow, Font Pairing Previewer, Aspect Ratio, and more.
SEO & Marketing Tools
15 tools15 free seo & marketing tools — Meta Tag, Open Graph Preview, UTM Link Builder, QR Code, Keyword Density, Robots.txt, and more.
Converter Tools
20 tools20 free converter tools — Unit, Currency, Time Zone, Data, Length, Temperature, and more.
Security & Privacy Tools
14 tools14 free security & privacy tools — JWT Decoder, Password Strength, Encryption / Decryption Tool, IP Address Lookup, Privacy Policy, SSL Certificate, and more.
Productivity Tools
12 tools12 free productivity tools — Pomodoro Timer, Countdown Timer, Habit Tracker, Meeting Cost, Invoice, Kanban Board, and more.
Social Media Tools
7 tools7 free social media tools — Social Media Image Resizer, Twitter/X Thread Formatter, Hashtag, Bio, YouTube Thumbnail Maker, Social Media Calendar, and more.
Education & Student Tools
6 tools6 free education & student tools — Citation, Study Timer, Flashcard Maker, Essay Word Counter, Grade, Reading Speed, and more.
Why ToolRux?
Built different — fast, free, and designed with you in mind.
Accurate Results
Industry-standard formulas and reliable methods — get dependable answers for finances, health metrics, development, and more.
Blazing Fast
Tools load instantly. No spinners, no waiting — just results in milliseconds, powered by modern web tech.
Easy to Use
Clean, intuitive interfaces. Just open any tool and start using it — zero learning curve.
Works Everywhere
Desktop, tablet, or phone — works perfectly on any modern browser, anywhere in the world.
Always Expanding
New tools and calculators added regularly. One platform that grows with your needs.
Dark Mode
Easy on the eyes with automatic dark mode support. Switch with one click or follow your system preference.
How it works
Three simple steps — pick, use, done.
Pick a tool
Browse 157+ free tools — calculators, converters, developer utilities, and more.
Enter your data
Type, paste, or upload. Every tool has a clean, intuitive interface designed for speed.
Get instant results
Results appear instantly. Copy, download, or share — no waiting, no limits.