Free Online Tools
Fast, free, no signup required.
84 tools total
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes from your date of birth.
EMI Calculator
Calculate monthly EMI, total interest, total payment, and view full amortization schedule for any loan.
Mortgage Calculator
Calculate monthly mortgage payments including principal, interest, property tax, and insurance.
SIP Calculator
Calculate SIP returns with regular and step-up (top-up) SIP options to plan your mutual fund investments.
Compound Interest Calculator
Calculate compound interest with flexible compounding frequency โ annually, monthly, daily, and more.
Percentage Calculator
Calculate percentages in three ways: X% of Y, X is what % of Y, and percentage change between two values.
BMI Calculator
Calculate your Body Mass Index (BMI) in metric or imperial units and see your weight category instantly.
GST Calculator
Add or remove GST/VAT/Sales Tax from any amount. Supports 25+ countries including India, UAE, UK, USA, Australia, Singapore and more.
Discount Calculator
Calculate the final price after discount, the amount saved, and the discount percentage on any product.
Scientific Calculator
Full-featured scientific calculator with trigonometry, logarithms, powers, and more.
Currency Converter
Convert between major currencies using live exchange rates. Fast, free, and no signup required.
Length Converter
Convert between mm, cm, meters, km, inches, feet, yards, miles and more. Instant results with all-units table.
Area Converter
Convert between square feet, square meters, acres, hectares, cent, gunta and more. Popular for land measurement.
Weight Converter
Convert between kg, grams, pounds, ounces, tons, stone, tola and more. Instant weight conversion.
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin and Rankine. Instant temperature conversion with formula.
Volume Converter
Convert between milliliters, liters, gallons, cups, pints, fluid ounces, cubic meters and more.
Speed Converter
Convert between km/h, mph, m/s, knots and Mach. Instant speed conversion for travel and science.
Data Converter
Convert between bytes, KB, MB, GB, TB, PB and bits. Instant digital storage conversion.
Time Converter
Convert between seconds, minutes, hours, days, weeks, months and years. Fast time unit conversion.
Fuel Cost Calculator
Calculate trip fuel cost by distance, mileage and fuel price. Supports km/litre and miles/gallon. Split cost by passengers.
Airline Baggage Checker
Check carry-on and checked baggage allowances for 18 major airlines. Verify if your bag fits before you fly.
Emergency Contacts & Phrase Hub
Emergency numbers (police, fire, ambulance, tourist helpline) for 12 countries. Essential travel phrases with pronunciation guide.
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case and more instantly.
Fancy Text Generator
Generate fancy Unicode text styles โ Bold, Italic, Script, Fraktur, Double-struck, Small Caps, Strikethrough and more. Works on Instagram, WhatsApp & Twitter.
Password Generator
Generate strong random passwords. Choose length, include uppercase, lowercase, numbers and symbols. Instant strength meter.
Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text by words, sentences or paragraphs. Instant copy. Perfect for designers and developers.
Text Repeater
Repeat any text multiple times with custom separator โ new line, space, comma or none. Great for testing and content creation.
Slug Generator
Convert any title or text into a URL-friendly slug. Choose hyphen or underscore separator. Great for blog posts and SEO.
Text Diff Checker
Compare two texts side by side and see exactly what changed. Lines added, removed and unchanged are highlighted clearly.
Remove Duplicate Lines
Remove duplicate lines from any list instantly. Case-sensitive or case-insensitive matching. See exactly how many duplicates were removed.
Text Reverser
Reverse text by characters, words, or lines. Instantly flip your text โ great for fun, puzzles and encoding.
Word Counter
Count words, characters, sentences, and paragraphs in your text instantly.
Gold Rate Today
Live gold price today for 24K, 22K, 21K and 18K per gram. Select your country โ India, UAE, Saudi Arabia, USA, UK โ to see local retail rates in your currency.
Silver Rate Today
Live silver price today per gram, per kg, and per tola. Select your country โ India, UAE, Saudi Arabia, USA โ to see local silver rates in your currency.
FD Calculator
Calculate Fixed Deposit maturity amount and interest earned with monthly, quarterly, half-yearly or yearly compounding.
RD Calculator
Calculate Recurring Deposit maturity amount and interest for any monthly deposit, tenure and interest rate.
PPF Calculator
Calculate PPF maturity value with tax-free interest. Plan your 15-year Public Provident Fund investment.
Income Tax Calculator
Calculate income tax for India (New & Old regime) and USA. See full slab-wise breakdown with effective tax rate.
Profit & Loss Calculator
Calculate profit or loss amount and percentage from cost price and selling price. Three calculation modes.
Loan Calculator
Calculate monthly EMI, total interest, and total payment for any loan instantly.
Kids Height & Weight Chart
Reference height and weight chart for children from birth to 10 years. Compare your child's measurements to standard growth milestones for boys and girls.
Merge PDF
Combine multiple PDF files into one. Upload PDFs, arrange order, and download the merged file instantly โ no upload to server.
Split PDF
Split a PDF into individual pages or custom page ranges. Download all split files instantly โ processed entirely in your browser.
PDF to Image
Convert PDF pages to high-quality JPG or PNG images. Choose resolution and quality โ all processed locally in your browser.
Image to PDF
Convert JPG, PNG, or WebP images into a single PDF file. Each image becomes one page โ processed entirely in your browser.
Compress PDF
Reduce PDF file size by re-optimizing the document structure. Fast, browser-based compression with no file uploads.
Rotate PDF
Rotate all or specific pages in a PDF by 90ยฐ, 180ยฐ, or 270ยฐ. Download the corrected PDF instantly โ no server needed.
Remove PDF Pages
Delete specific pages from a PDF. Enter page numbers to remove and download the cleaned PDF โ all done in your browser.
Reorder PDF Pages
Rearrange PDF pages in any order. Enter the new page sequence and download the reordered PDF โ processed in your browser.
Add Page Numbers
Add page numbers to every page of your PDF. Choose position, font size, and starting number โ downloaded instantly.
Add Watermark to PDF
Add a diagonal text watermark to every page of your PDF. Customize text, opacity, and size โ all done in your browser.
Protect PDF
Add a password to your PDF to restrict access. Set user and owner passwords โ processed locally in your browser.
Unlock PDF
Remove password protection from a PDF file. Enter the PDF password to unlock and download an unprotected copy.
Resize PDF Pages
Resize all PDF pages to a standard paper size โ A4, A3, Letter, Legal, and more. Processed locally in your browser.
Edit PDF Metadata
View and edit PDF metadata โ title, author, subject, keywords, and creator. Download the updated PDF instantly.
Resize Image
Resize any image to exact pixel dimensions or a percentage of the original. Lock aspect ratio to prevent distortion.
Compress Image
Reduce image file size by adjusting JPEG quality. See original vs compressed size comparison and download instantly.
Convert Image Format
Convert images between JPG, PNG, and WebP formats. Transparent PNGs are handled correctly. No upload required.
Crop Image
Crop any image to exact pixel coordinates. Set X, Y, width, and height manually, or choose from quick presets like square center crop.
Rotate & Flip Image
Rotate images 90ยฐ, 180ยฐ, or 270ยฐ clockwise, and flip horizontally or vertically. Download the result instantly.
Add Watermark to Image
Add a text watermark to any image. Choose position, opacity, font size, and color. Download the watermarked image instantly.
Image to Base64
Convert images to Base64 encoded strings for use in HTML, CSS, or JSON. Also decode Base64 strings back to images.
Color Picker from Image
Pick any color from an image and get the HEX, RGB, and HSL values instantly. Click anywhere on the image to sample colors.
Image Enhancer
Sharpen blurry images and adjust brightness, contrast, and saturation. Live preview before download. No upload required.
Image Metadata Viewer
View hidden metadata in any image โ camera model, exposure settings, GPS coordinates, date taken, and more EXIF data.
Add Background to Image
Add a solid color background to any image. Turn transparent PNGs into white, black, blue, or any custom color. Download as PNG or JPEG.
QR Code Generator
Generate QR codes for URLs, text, WiFi, phone numbers, and emails. Download as PNG. Free and instant.
Color Converter
Convert colors between HEX, RGB, HSL, and CMYK instantly. Visual color picker included. Copy any format with one click.
Date Difference Calculator
Calculate the exact difference between two dates in years, months, weeks, days, hours, and minutes.
Timezone Converter
Convert time across multiple time zones instantly. Compare up to 5 cities side by side. Perfect for scheduling international meetings.
JSON Formatter & Validator
Format, beautify, and validate JSON instantly. Minify for production or pretty-print for readability. Error highlighting included.
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 strings back to plain text. Supports Unicode and URL-safe Base64.
URL Encoder / Decoder
Encode special characters in URLs or decode percent-encoded URLs. Handles full URLs and individual query parameters.
UUID Generator
Generate cryptographically secure UUID v4 identifiers. Generate up to 20 at once. Copy individually or all at once.
Hash Generator
Generate SHA-256, SHA-1, and MD5 hashes from any text. Instant, browser-based, nothing sent to any server.
Number Base Converter
Convert numbers between Binary, Octal, Decimal, and Hexadecimal instantly. See all bases at once as you type.
Regex Tester
Test and debug regular expressions live. See all matches highlighted, capture groups, and match details instantly as you type.
JWT Decoder
Decode and inspect JSON Web Tokens (JWT) instantly. View header, payload, claims, and check token expiry status. No data sent to any server.
Markdown Preview
Write Markdown and see the rendered HTML preview live side by side. Supports headings, bold, italic, lists, code blocks, tables, and more.
Calorie & TDEE Calculator
Calculate your daily calorie needs (TDEE) using the Mifflin-St Jeor formula. Get personalized targets for weight loss, maintenance, and muscle gain.
Ideal Weight Calculator
Find your ideal body weight using 4 formulas โ Devine, Robinson, Miller, and Hamwi. Supports metric and imperial units.
Water Intake Calculator
Calculate your daily water intake based on your weight, activity level, and climate. Get results in litres and glasses.
Sleep Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles. Wake up refreshed by timing your alarm to the end of a cycle.
Pregnancy Due Date Calculator
Calculate your pregnancy due date from last menstrual period, conception date, or IVF transfer date. Shows current week, trimester, and key milestones.
Nworko is a collection of 84 free, browser-based tools spanning finance calculators (EMI, SIP, GST, mortgage, compound interest), health calculators (BMI, calorie/TDEE, pregnancy due date), unit converters, PDF and image editing tools, developer utilities, and live gold and silver rates. Every calculator uses the real formula behind the result โ shown on each tool's page โ rather than a black-box number, and every PDF, image, and text tool processes your files entirely in your browser, so nothing you upload is ever sent to a server. No sign-up, no email, and no limit on how many times you can use any tool.
๐ Privacy-first
PDF, image, and text tools run entirely in your browser โ files never uploaded.
๐งฎ Real formulas
Every calculator explains the exact math behind your result, not a black box.
๐ Always free
No sign-up, no email, no usage limits on any tool.
๐ 10 categories
Finance, health, converters, PDF, image, developer tools, and more.