Monkzi ToolsFree online converters & calculators — fast, private, no signup
Convert length, weight, temperature, area, speed and data instantly.
This free unit converter supports length (meters, kilometers, miles, feet, inches), weight (kilograms, pounds, ounces, tonnes), temperature (Celsius, Fahrenheit, Kelvin), area (square meters, acres, hectares), speed and digital data storage. All conversions use standard international factors and update instantly.
Three common percentage problems, solved instantly.
Solve the three most common percentage problems: finding a percentage of a number, finding what percent one number is of another, and calculating percentage increase or decrease. Useful for discounts, taxes, tips, grades and financial changes.
Monthly payment for home, car or personal loans.
EMI is calculated using EMI = P × r × (1+r)ⁿ / ((1+r)ⁿ − 1), where P is the loan amount, r is the monthly interest rate and n is the number of months. Plan home, car or personal loans and see total interest over the full tenure.
Body Mass Index from height and weight.
Body Mass Index (BMI) is weight in kilograms divided by height in meters squared. WHO categories: below 18.5 underweight, 18.5–24.9 normal, 25–29.9 overweight, 30+ obese. BMI is a screening estimate, not a diagnosis.
Exact age in years, months and days.
Calculate your exact age from your date of birth in years, months and days, plus total days. Handles leap years and varying month lengths. Useful for forms, eligibility checks and birthday countdowns.
Count words, characters, sentences and reading time.
Count words, characters, sentences and estimated reading time (200 words/minute) as you type. Nothing is uploaded — your text stays in your browser. Ideal for essays, tweets, meta descriptions and assignments with word limits.
Change text to UPPER, lower, Title or Sentence case.
Instantly convert text between UPPERCASE, lowercase, Title Case and Sentence case, with one-click copy. Handy for fixing caps-lock mistakes, headlines and document formatting.
Final price after discount, and how much you save.
Enter the original price and the discount percentage to instantly see the final sale price and how much you save. Works for store sales, coupon codes, festival offers and clearance pricing.
Turn any text, link or UPI ID into a QR code — free, instant, no watermark.
Generate QR codes for website links, WiFi passwords, UPI payment IDs, phone numbers, or any text. The QR code is created entirely in your browser — nothing is sent to a server — and downloads as a clean PNG with no watermark. Scannable by any phone camera or QR scanner app.
Strong random passwords, generated securely in your browser.
This password generator uses your browser's cryptographically secure random number generator (crypto.getRandomValues) — passwords are never sent anywhere or stored. Mix uppercase, lowercase, numbers and symbols; 16+ characters is recommended for important accounts. A 16-character mixed password has over 100 bits of entropy, making it effectively impossible to brute-force.
Convert text or files to Base64 and back — supports Unicode & emoji.
Base64 encoding converts text or binary data into a safe ASCII string, widely used for embedding images in HTML/CSS, API payloads, email attachments and JWT tokens. This tool handles full Unicode including Hindi text and emoji, and can convert any file into a Base64 data URL — all locally in your browser.
Convert images between JPG / PNG / WebP, or combine them into a PDF.
Convert photos between JPG, PNG and WebP formats, or combine multiple images into a single PDF document — perfect for submitting scanned documents, Aadhaar/PAN copies, or homework as one file. Conversion happens entirely on your device: your files are never uploaded to any server, so it's fast and completely private.
Monkzi Tools is the free utilities section of monkilla.com — a collection of calculators and converters built to be fast, accurate and simple. All tools run entirely in your browser: nothing you type is uploaded or stored on any server. No account or signup is needed.
All calculations on monkilla.com/tools happen locally in your browser. We do not collect, store or transmit any data you enter into our tools. This site uses Google Analytics and may use third-party advertising (such as Google AdSense), which may use cookies to serve ads based on your prior visits. You can opt out of personalized advertising via Google's Ads Settings. Contact: monkillacoin@gmail.com
Questions, feedback or tool requests? Email monkillacoin@gmail.com — we usually reply within a couple of days.