CoringaWebFree online tools to get things done in seconds
34 calculators, converters and generators that run right in your browser: percentages, compound interest, passwords, QR Codes, word counter and much more.
- 100% free
- No sign-up
- Your data never leaves your browser
- Works on mobile
🕘 Recently used
Shortcuts to the tools you opened last on this device.
⭐ Featured tools
The most popular CoringaWeb tools, ready to use.
Percentage Calculator
Solve any percentage problem easily. Calculate increases, decreases, and proportions in seconds
Simple Compound Interest
Calculate investment growth over time. Plan your future with accurate monthly and annual interest results
Password Generator
Create strong, secure, and random passwords. Customize length and symbols to protect your online accounts
QR Code Generator
Create custom QR Codes for links, Wi-Fi, or text. High-quality images ready for your marketing materials
Discount Calculator
Find out the final price after any discount. Calculate how much you save on sales and promotions instantly
Visual Rule of Three
Solve proportions and ratios instantly. The easiest way to calculate unknown values for math or daily tasks
Finance
Percentages, interest, discounts and rent vs. buy.
Percentage Calculator
Solve any percentage problem easily. Calculate increases, decreases, and proportions in seconds
Simple Compound Interest
Calculate investment growth over time. Plan your future with accurate monthly and annual interest results
Discount Calculator
Find out the final price after any discount. Calculate how much you save on sales and promotions instantly
Visual Rule of Three
Solve proportions and ratios instantly. The easiest way to calculate unknown values for math or daily tasks
Number to Words Converter
Convert any number into written English text. Ideal for checks, legal documents, and formal writing
Rent vs. Buy
Compare the costs of renting a home versus financing. Make a smarter financial decision with our detailed analysis
Time & Work
Add up working hours and minutes.
Text & Writing
Count, clean, convert and organize text.
Word Counter
Count words, characters, and reading time in real-time. Essential for students, writers, and SEO professionals
Case Converter
Switch text between UPPERCASE, lowercase, and Title Case. Clean up your content with one click
Text Cleaner
Remove extra spaces, line breaks, and hidden formatting. Make your content clean and ready for publishing or coding
Find and Replace
Search for specific words and replace them all at once. Save time when editing long documents or code snippets
Accent Remover
Remove accents and special characters (like á, é, ç) from your text. Transform strings into URL-friendly or clean format
List Sorter
Sort your lists alphabetically or numerically. Organize names, items, or data in ascending or descending order instantly
Remove Duplicate Lines
Automatically find and delete repeated lines from your text. Perfect for cleaning up large lists and databases
Text Reverser
Flip your text or words backwards. A fun and useful tool for specific coding tasks or creative writing projects
Lorem Ipsum Generator
Generate professional placeholder text for your designs. Customize the number of paragraphs or words you need
Character Map
Find and copy special characters and symbols. Access the full Unicode list for any document or design
Emoji Keyboard
Copy and paste emojis easily. A complete library of symbols and icons to use on social media and web
Dates & Time
Add days, count intervals and convert time zones.
Date Calculator
Add or subtract days from any date. Perfect for planning deadlines, events, and project timelines
Date Difference
Calculate the exact time between two dates. See the total days, months, and years for project tracking or events
Day of the Week
Find out which day of the week any date falls on. Check past or future dates for birthdays and appointments
Countdown Timer
Create a live countdown for your next big event. Track the seconds until your launch, birthday, or deadline
Time Zone Converter
Convert time between any city worldwide. Schedule international meetings and calls without any confusion
Generators & Pickers
Passwords, QR Codes, WhatsApp links and fair draws.
Password Generator
Create strong, secure, and random passwords. Customize length and symbols to protect your online accounts
QR Code Generator
Create custom QR Codes for links, Wi-Fi, or text. High-quality images ready for your marketing materials
WhatsApp Link Generator
Create custom WhatsApp links with pre-filled messages. Professionalize your business and boost your sales
Random Number
Generate a random number within any range. Perfect for giveaways, contests, or making unbiased decisions
Random Name Picker
Pick a winner from a list of names. The fairest way to run raffles and social media giveaways for your fans
Tech & IT
Your IP, browser info and data unit conversion.
Whats My IP
Find your public IP address and network details. Securely identify your location and ISP information
System Info
Get detailed information about your browser and OS. Quickly check your screen resolution and user agent
Byte Converter
Convert between B, KB, MB, GB, and TB. The perfect tool for managing storage and data transfer sizes
Health
BMI and daily water intake.
Converters
Length, weight, temperature and more.
No tools found for “”. Suggest this tool and we will build it.
📘 Step-by-step guides
Understand the math before you use the tool.
Why Your 1 TB Drive Shows 931 GB (and Other Data Unit Mysteries)
Decimal vs binary units (GB vs GiB), why storage looks smaller than advertised, bits vs bytes for internet speed, plus a quick conversion table.
Read the guide →What Day of the Week Was I Born? Find Out in Seconds
Find the weekday of any date, past or future, and learn the math behind it: Zeller's congruence with a worked example and the mental Doomsday rule.
Read the guide →Rent or Buy a Home? A Simple Way to Decide With Real Numbers
Compare renting and buying honestly: unrecoverable costs, the 5% rule with a worked example, price-to-rent ratio and the break-even time.
Read the guide →How to Write a Check: Amount in Words, With Examples
Write the dollar amount on a check correctly: hyphens, cents as fractions, when to use "and", amounts in the thousands and how to prevent fraud.
Read the guide →How to Make a QR Code That Scans Every Time
Create a free QR code for a link, Wi-Fi or text: static vs dynamic codes, the Wi-Fi format, print size and contrast rules, and mistakes that stop scans.
Read the guide →How to Create a WhatsApp Click-to-Chat Link With a Message
Build a wa.me link that opens a chat with your number and a ready-made message. Number format, URL encoding, QR codes and tips for businesses, step by step.
Read the guide →
A complete online toolkit, nothing to install
CoringaWeb brings together the tools you usually search for one by one. Need to calculate a percentage, project compound interest or create a strong password? Just open it and use it.
Productivity for writers and office work
Count characters with the word counter, fix titles with the case converter, clean lists and create QR Codes and WhatsApp links for your business.
Privacy first
Calculations run in your browser. Your text and passwords are never sent to our servers. Read our privacy policy.
Frequently asked questions
Everything you need to know about CoringaWeb.
Is CoringaWeb free?
Yes. Every tool is 100% free, with no sign-up and no usage limits. The site is supported by unobtrusive ads.
Do I need to install anything?
No. Everything runs in your web browser, on mobile or desktop.
Is my data stored?
No. Calculations and text are processed in your own browser and are not sent to or stored on our servers.
Can I suggest a new tool?
Absolutely! Send your idea through the contact page. New tools are built from user requests.
Missing a tool?
Tell us what you need to calculate. Our next tools come from user requests.
Suggest a tool