Free Online Calculators & Tools – PDF, Image, Math & More
Free calculators plus PDF, image, math, date, text and everyday browser tools — fast, mobile-friendly and no signup required.
Useful tools to start with
Hand-picked calculators and practical tools for quick access.
Image Tools
16 toolsImage Compressor
Compress JPG, PNG and WebP images quickly while preserving visual quality.
Image Resizer
Resize images by pixels or percentage while keeping the aspect ratio.
Image Converter
Convert between JPG, PNG and WebP directly in your browser.
HEIC to JPG
Convert iPhone HEIC or HEIF photos to widely compatible JPG images.
WebP Converter
Convert WebP images to JPG or PNG quickly with preview and instant download.
Image Cropper
Crop images interactively with mouse or touch, resize or move the crop area, and use preset aspect ratios.
Rotate & Flip Image
Rotate an image by 90 or 180 degrees and flip it horizontally or vertically.
Image Watermark
Add text or a logo watermark with adjustable opacity, size and position.
EXIF Metadata Viewer
View photo metadata such as camera, date, orientation and GPS coordinates when available.
EXIF Metadata Remover
Create a clean copy of an image without embedded camera or location metadata.
Image Color Picker
Upload an image and click any point to extract its HEX, RGB and HSL color values.
Favicon Generator
Turn an image or logo into common favicon sizes and a multi-size favicon.ico file.
Passport Photo Maker
Create a passport-style photo with common sizes, manual adjustments and a printable sheet in your browser.
Background Remover
AI background removal in the browser, with retouch brush and high-resolution exports.
AI Image Upscaler
Upscale small images 2× with an AI model in your browser.
Image to Text OCR
Recognize Arabic and English text from images and scans.
PDF Tools
13 toolsMerge PDF
Combine multiple PDF files into one and control their order.
Split PDF
Extract selected pages from a PDF into a new file.
Images to PDF
Convert multiple images into one PDF with page ordering.
PDF Compressor
Reduce PDF file size by choosing image quality and page resolution, then download the compressed copy.
PDF to JPG
Convert PDF pages into high-quality JPG images and download each page separately.
Reorder PDF Pages
Change the order of PDF pages by entering a new sequence, then download the result.
Delete PDF Pages
Select pages to remove such as 2,4,7-9 and create a new PDF.
Rotate PDF Pages
Rotate all PDF pages or selected pages by 90, 180 or 270 degrees.
Add Page Numbers to PDF
Add page numbers with a selected position, font size and starting number.
PDF Watermark
Add a text watermark to PDF pages with adjustable size, opacity and rotation.
PDF Metadata Editor
View and edit PDF title, author, subject and keywords.
PDF to Text
Extract selectable text from PDF pages and copy or download it as TXT.
Fill & Sign PDF
Add text, checks, dates, drawn or uploaded signatures, and a company stamp to PDFs in your browser.
Calculators
9 toolsExact Age Calculator
Calculate exact age in years, months and days, total days, birth weekday, next birthday and optional age difference.
Percentage Calculator
Calculate a percentage of a number, percentage change and percentage difference.
Discount Calculator
Calculate final price, savings and optional tax after a discount.
Date Difference Calculator
Calculate days, weeks, months and years between two dates.
Unit Converter
Convert length, weight, area, volume, speed, temperature and digital storage units.
Loan Calculator
Calculate monthly payment, total interest and total loan cost.
Compound Interest Calculator
Calculate investment growth with recurring contributions and compound interest over time.
BMI Calculator
Calculate BMI from height and weight and see the general adult category.
Calorie Calculator
Estimate daily calorie needs from age, height, weight, activity and goal.
Text Tools
4 toolsWord & Character Counter
Count words, characters, sentences, paragraphs and reading time instantly.
URL Slug Generator
Convert a title into a clean URL slug with Arabic and English-friendly options.
Text Case Converter
Convert text between uppercase, lowercase, Title Case and sentence case instantly.
Text Diff Checker
Compare two texts line by line and highlight added, removed and unchanged lines.
Utilities
9 toolsQR Code Generator
Create a QR code for a URL, text or phone number and download it.
Password Generator
Generate strong random passwords with length and character controls.
Hijri / Gregorian Converter
Convert a Gregorian date to its Hijri equivalent and display both formats.
YouTube Thumbnail Downloader
Paste a YouTube video URL and view available thumbnail images in multiple sizes.
WiFi QR Code Generator
Create a Wi-Fi QR code from network name and password for easier connection.
Barcode Generator
Create Code 128, EAN-13, UPC-A and Code 39 barcodes and download SVG or PNG.
Barcode Scanner
Scan barcodes from an image or your device camera in supported browsers.
QR Code Scanner
Scan a QR code from an image or camera and instantly read its text or URL.
HEX RGB HSL Converter
Convert colors between HEX, RGB and HSL instantly with live preview and copy.
Developer Tools
4 toolsImage to Base64 Converter
Convert an image file to a Base64 data URL or decode Base64 back into a downloadable image.
JSON Formatter & Validator
Validate, pretty-print or minify JSON and see clear parsing errors.
JSON ↔ CSV Converter
Convert JSON arrays to CSV or CSV data to JSON with quoted-field support.
Unix Timestamp Converter
Convert Unix timestamps in seconds or milliseconds to dates and back.
Career Tools
1 toolsDesign & Print
1 toolsEngineering & Construction
15 toolsConcrete Calculator
Calculate concrete volume plus estimated cement, sand and aggregate for slabs, footings and circular columns.
Brick Calculator
Estimate bricks or blocks for a wall, subtract openings and include mortar joints and waste.
Tile Calculator
Calculate tile count, covered area and boxes with allowance for cuts and breakage.
Paint Calculator
Calculate wall area, liters of paint and cans from room dimensions, coats and coverage rate.
Plaster Calculator
Estimate plaster mortar, cement and sand from wall area, thickness and mix ratio.
Rebar Weight Calculator
Calculate rebar unit weight and total steel weight from bar diameter, length and quantity.
Foundation Calculator
Calculate concrete volume for isolated or strip footings, quantity and waste allowance.
Stair Calculator
Calculate risers, tread depth, stair angle and stringer length from floor height and available run.
Room Area Calculator
Calculate floor, ceiling, wall area and perimeter while subtracting doors and windows.
Excavation Calculator
Calculate excavation volume and estimated loose volume using a bulking factor.
Sand & Gravel Calculator
Estimate volume and weight of sand, gravel or crushed stone from dimensions and bulk density.
Drywall Calculator
Estimate drywall sheets, covered area, waste, screws and joint tape.
Roofing Calculator
Calculate sloped roof area and covering sheets from building dimensions, pitch and overhang.
Pipe Volume Calculator
Calculate internal pipe capacity in liters and cubic meters from inside diameter and length.
Tank Volume Calculator
Calculate rectangular or cylindrical tank capacity in liters and cubic meters, including fill percentage.
Date & Time
7 toolsBusiness Days Calculator
Calculate working days between two dates while excluding weekends.
Birthday Calculator
Find your next birthday, days remaining and age you will turn.
Days Alive Calculator
Calculate how many days, weeks and hours you have lived since your birth date.
Day of Birth Calculator
Discover the weekday of your birth date and useful calendar details.
Date Add/Subtract Calculator
Add or subtract days, weeks, months or years from any date.
Countdown Calculator
Calculate the time remaining until a chosen date and time in days, hours and minutes.
Time Duration Calculator
Calculate the duration between two times in hours and minutes, including overnight ranges.
Student Tools
3 toolsMoney & Business
11 toolsVAT Calculator
Add or remove VAT from a price using any tax rate.
Profit Margin Calculator
Calculate profit and profit margin from cost and selling price.
Salary Increase Calculator
Calculate new salary, increase amount and percentage after a raise.
Savings Calculator
Estimate savings growth with regular deposits and compound returns.
Savings Goal Calculator
Find the monthly amount needed to reach a savings goal by a target date.
Break-Even Calculator
Calculate units and revenue needed to cover costs with no profit or loss.
Markup Calculator
Calculate selling price, markup percentage and margin from cost.
Zakat Calculator
Calculate 2.5% of zakatable wealth after liabilities using a nisab value you provide.
Mortgage Calculator
Calculate monthly mortgage payment and total interest with down payment, taxes and insurance.
Number to Words
Convert numbers and amounts into accurate Arabic and English words with common currency support.
Invoice Generator
Choose from three invoice designs, add logo and line items, save drafts locally, and export PDF.
Everyday Tools
7 toolsFuel Cost Calculator
Calculate fuel cost for a distance using vehicle economy and fuel price.
Fuel Economy Calculator
Calculate vehicle fuel economy in km/L and L/100 km from distance and fuel used.
Trip Cost Calculator
Estimate road-trip cost including fuel and tolls, with cost splitting between travelers.
Electricity Cost Calculator
Calculate appliance energy use in kWh and estimated daily and monthly electricity cost.
Pomodoro Timer
Use adjustable focus and break sessions with a clear browser-based Pomodoro timer.
Online Stopwatch
Start, pause and record laps with a simple browser-based stopwatch.
Online Countdown Timer
Set minutes and seconds and run a browser countdown with an alert at zero.
Health & Fitness
7 toolsBody Fat Calculator
Estimate adult body-fat percentage using a measurement-based formula.
Ideal Weight Calculator
View estimated ideal-weight ranges using several common adult formulas.
Calorie Deficit Calculator
Estimate a daily calorie deficit for a gradual weight-change goal.
Macro Calculator
Split daily calories into protein, carbohydrates and fat based on your goal.
BMR Calculator
Estimate adult basal metabolic rate using the Mifflin-St Jeor equation.
TDEE Calculator
Estimate total daily energy expenditure from BMR and activity level.
Running Pace Calculator
Calculate running pace, speed and projected time from distance and duration.
Math Tools
10 toolsFraction Calculator
Add, subtract, multiply and divide fractions with automatic simplification.
Average Calculator
Calculate mean, sum, minimum and maximum for a list of numbers.
Ratio Calculator
Simplify ratios and solve a missing value in a four-value proportion.
Probability Calculator
Calculate event probability from favorable and total possible outcomes.
Standard Deviation Calculator
Calculate mean, variance and standard deviation for a sample or population.
Area Calculator
Calculate area for rectangles, squares, circles, triangles and trapezoids.
Volume Calculator
Calculate volume for cubes, boxes, cylinders, spheres and cones.
Pythagorean Calculator
Find a missing side of a right triangle using the Pythagorean theorem.
Scientific Calculator
Evaluate trigonometric, logarithmic, root and power functions in a single expression.
Online Calculator
A fast basic calculator for arithmetic, percentages and parentheses with memory, history and keyboard support.
Random Tools
7 toolsWheel Spinner
Enter options and spin a visual wheel to pick a random result.
Random Name Picker
Paste a list of names and pick one at random with a single click.
Random Winner Picker
Pick one or more winners from a participant list without duplicates.
Random Number Generator
Generate one or multiple random numbers within a range you choose.
Coin Flip
Flip a virtual coin randomly and track heads and tails counts.
Dice Roller
Roll one or more dice and choose the number of sides.
Random Team Generator
Split a list of names randomly into the number of teams you choose.