Free Online Apps

148+ powerful apps for health, finance, images, PDFs, and more. 100% free, no signup required, works offline.

BMI Calculator

Calculate your Body Mass Index with WHO health categories and personalised insights.

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BMR Calculator

Find your Basal Metabolic Rate, the calories your body burns at rest every day.

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Calorie Calculator

Calculate your daily calorie needs based on your age, activity level, and goals.

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Body Fat Calculator

Estimate body fat percentage using multiple methods: Navy, BMI, and more.

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Ideal Weight Calculator

Find your healthy weight range using Devine, Robinson, Miller, and Hamwi formulas.

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Macro Calculator

Get personalised protein, carb, and fat targets based on your calorie goal.

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Pace Calculator

Calculate running pace, speed, and split times for any distance and time.

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One Rep Max Calculator

Estimate your one-rep max (1RM) for any lift using multiple proven formulas.

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Lean Body Mass Calculator

Calculate your lean body mass (fat-free mass) using Boer and James formulas.

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Due Date Calculator

Estimate your pregnancy due date from your last menstrual period or conception date.

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Pregnancy Calculator

Track your pregnancy week by week. See milestones, trimester progress, and baby size.

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Conception Calculator

Estimate when conception likely occurred based on your due date or LMP.

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Water Intake Calculator

Calculate your recommended daily water intake based on weight, activity, and climate.

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Calories Burned Calculator

Estimate calories burned during 25+ exercises and daily activities using MET values.

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Protein Intake Calculator

Find your optimal daily protein intake for muscle gain, weight loss, or general health.

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Sleep Calculator

Find the best times to sleep and wake up based on 90-minute sleep cycles.

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Weight Loss Calculator

Plan your weight loss with personalised calorie targets, timelines, and goal dates.

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TDEE Calculator

Calculate your Total Daily Energy Expenditure using Mifflin-St Jeor and Harris-Benedict.

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Carbohydrate Calculator

Calculate your optimal daily carb intake based on TDEE, activity level, and dietary goals.

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Fat Intake Calculator

Find your recommended daily fat intake for balanced, low-fat, high-fat, or keto diets.

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Healthy Weight Calculator

Find your healthy weight range based on height using WHO BMI standards.

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Target Heart Rate Calculator

Calculate your personalised exercise heart rate zone using the Karvonen method.

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VAT & Sales Tax Calculator

Add or remove VAT/Sales Tax instantly. Supports UK, USA, and UAE tax rates.

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Profit Margin Calculator

Calculate profit margin, markup, and selling prices. Multi-currency support.

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Hourly Rate Calculator

Convert your annual salary to hourly rate. Perfect for freelancers and contractors.

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Take-Home Pay Calculator

Calculate your UK take-home pay after Income Tax and National Insurance for 2025/26.

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Age Calculator

Calculate your exact age in years, months, days, weeks, hours, and minutes.

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Percentage Calculator

Calculate percentages instantly. X% of Y, percentage change, add/subtract %.

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Discount Calculator

Calculate sale prices and savings. Stack multiple discounts. Multi-currency support.

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Tip Calculator

Calculate tips and split bills easily. Preset percentages for restaurants and services.

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ROI Calculator

Calculate Return on Investment and annualised CAGR. Compare investment performance.

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Expense Split Calculator

Split bills and expenses fairly between friends. Minimum transfers algorithm.

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Zakat Calculator

Calculate your annual Zakat obligation: 2.5% on qualifying wealth above Nisab.

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Unit Price Calculator

Compare unit prices to find the best deal. Add products and see cost per unit.

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Break-Even Calculator

Calculate your break-even point in units and revenue. Fixed & variable cost analysis.

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Markup Calculator

Calculate markup percentage, profit margin, and selling price. Convert between markup and margin.

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Salary Calculator

Convert salary between hourly, daily, weekly, biweekly, monthly, and annual. Multi-currency.

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Commission Calculator

Calculate flat or tiered sales commission. Add base salary and see effective rates.

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Rent Affordability Calculator

Find out how much rent you can afford at 30%, 40%, and 50% of your income.

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Freelance Rate Calculator

Calculate your ideal freelance hourly and day rate from target income, expenses, and tax.

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Timesheet Calculator

Calculate weekly work hours and pay from start/end times. Supports overtime and breaks.

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Grocery Budget Calculator

Plan your monthly grocery budget by household size with eating-out adjustments.

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Travel Budget Calculator

Plan your trip budget with accommodation, flights, food, activities, and transport breakdowns.

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Date Difference Calculator

Calculate the exact difference between two dates in years, months, weeks, days, and hours.

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Countdown Calculator

Calculate exactly how many days, weeks, and months until any date. Events, holidays, deadlines.

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Business Days Calculator

Count working days between dates or add business days. Excludes weekends automatically.

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Background Remover

Remove image backgrounds instantly with AI. 100% free, unlimited, private.

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Image Upscaler

Upscale images up to 4x with AI. Enhance resolution for print, social, or HD output.

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Image Compressor

Compress images online. Reduce file sizes while maintaining quality. Batch processing.

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Image Resizer

Resize images for social media. Presets for Instagram, Facebook, Twitter & more.

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Color Palette Generator

Generate beautiful color palettes. Extract from images or create with color theory.

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Text Remover

Remove text from images with AI. Paint over text and let AI fill it realistically.

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Watermark Remover

Remove logo and symbol watermarks from images with AI. Paint and erase.

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Merge PDF

Combine multiple PDF files into one document. Drag, drop, reorder, and merge.

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Split PDF

Extract pages from PDF files. Split into individual pages or custom ranges.

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Rotate PDF

Rotate PDF pages 90°, 180°, or 270°. Fix page orientation easily.

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PDF to JPG

Convert PDF pages to high-quality JPG images. Adjustable quality and resolution.

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JPG to PDF

Convert images to PDF. Combine multiple JPG or PNG files into one document.

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Compress PDF

Reduce PDF file size without losing quality. Three compression presets available.

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PDF to Word

Convert PDF to editable Word documents. Extract text with formatting preserved.

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Sign PDF

Add your signature to any PDF. Draw, type, or upload your signature.

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Protect PDF

Add password protection to PDF files. Control print, copy, and edit permissions.

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Organize PDF

Reorder, delete, and add pages. Visual drag-and-drop page management.

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Word Counter

Count words, characters, sentences. Reading time, speaking time, and word frequency.

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SEO-Friendly URL Generator

Turn blog titles into clean URLs. Bulk generate, copy or download as CSV.

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Lorem Ipsum Generator

Generate placeholder text for your designs. Paragraphs, sentences, or word count.

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Case Converter

Convert text between UPPERCASE, lowercase, Title Case, camelCase, snake_case and more.

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Text Diff Checker

Compare two texts and see additions, deletions, and unchanged lines highlighted.

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JSON Formatter & Validator

Format, validate, and minify JSON instantly. Pretty-print with 2 or 4 space indent.

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QR Code Generator

Generate QR codes for any URL or text. Customise colours and download as PNG.

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Password Generator

Generate cryptographically secure passwords. Customisable length and character types.

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UUID Generator

Generate random UUID v4 identifiers instantly. Cryptographically secure and browser-based.

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Hash Generator

Generate SHA-256, SHA-384, SHA-512, and SHA-1 hashes from any text. 100% private.

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Quote Generator

Create professional trade quotes in seconds. Add line items, VAT, and download as PDF.

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Invoice Generator

Create professional invoices with line items, tax, and download as PDF. Free and private.

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Meta Tag Generator

Generate SEO meta tags, Open Graph, and Twitter Card tags. Copy-paste ready HTML.

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Markdown to HTML

Convert Markdown to clean HTML instantly. Live preview, headers, bold, links, code blocks.

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Regex Tester

Test and debug regular expressions in real time. See matches highlighted instantly.

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Readability Score Checker

Analyse text with Flesch, Gunning Fog, and SMOG scores. Writing insights included.

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Duplicate Line Remover

Remove duplicate lines from text. Preserves order, case-sensitive toggle, blank line removal.

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Whitespace Remover

Clean up text by removing extra spaces, blank lines, tabs, and trailing whitespace.

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Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to text. Supports UTF-8 and Unicode.

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URL Encoder & Decoder

Encode or decode URLs and query parameters. Supports encodeURI and encodeURIComponent.

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Color Converter

Convert colours between HEX, RGB, and HSL formats. Native colour picker included.

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Google SERP Preview

Preview how your page appears in Google search results. Optimise titles and descriptions.

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Privacy Policy Generator

Generate a free, GDPR-compliant privacy policy for your website in seconds.

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Time Zone Converter

Convert times between 25+ world time zones. Handles daylight saving automatically.

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Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates. Seconds and milliseconds.

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Work Hours Calculator

Calculate weekly work hours, overtime, and pay. Enter start/end times and breaks.

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Ovulation Calculator

Estimate your ovulation date and fertile window based on your menstrual cycle.

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Heart Rate Zone Calculator

Calculate your 5 training zones using Karvonen or percentage method. Fat burn to VO2 max.

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Robots.txt Generator

Generate a robots.txt file for your website. Control search engine crawling visually.

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Terms & Conditions Generator

Generate free T&C for your website or app. Ecommerce, accounts, and refund clauses.

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Schema Markup Generator

Generate JSON-LD structured data for Google rich results. Business, Article, FAQ, Product.

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Keyword Density Checker

Analyse keyword density, word frequency, and check target keyword SEO optimisation.

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CSS Minifier

Minify CSS. Remove comments, whitespace, and redundant characters to reduce file size.

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HTML Minifier

Minify HTML. Strip comments, whitespace, and reduce file size for faster page loads.

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JavaScript Minifier

Minify JavaScript. Strip comments and whitespace to reduce bundle size instantly.

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JWT Decoder

Decode and inspect JSON Web Tokens. View header, payload, and expiration status.

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Cron Expression Generator

Build cron expressions visually. Pick presets or customise each field with instant preview.

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Favicon Generator

Generate favicons in all standard sizes (16×16 to 512×512) from any image. Download as ZIP.

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Image to PNG

Convert any image (JPG, WebP, BMP, GIF) to PNG format. Preserves transparency.

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Image to WebP

Convert images to WebP, Google's modern format. Adjustable quality for smaller files.

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Text Reverser

Reverse text by characters, words, or lines. Instant results, multiple modes.

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Binary ↔ Text Converter

Convert text to binary and binary to text. ASCII encoding with space-separated bytes.

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Image Cropper

Crop images online. Drag to select the area you want, then download the result.

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Image Metadata Viewer

View image metadata: file size, dimensions, aspect ratio, and more. No upload to any server.

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Morse Code Translator

Translate text to Morse code and Morse code to text. Letters, numbers, and punctuation.

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ROT13 Encoder / Decoder

Encode or decode text using the ROT13 cipher. Apply it twice to get the original back.

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HTML to Text

Strip HTML tags and extract plain text. Removes scripts, styles, and all markup.

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Pomodoro Timer

Stay focused with the Pomodoro technique. Timed work intervals with breaks. Tracks sessions.

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Emoji Picker & Copy

Browse 500+ emojis by category. Click any emoji to copy it to your clipboard instantly.

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Currency Converter

Convert between 35+ world currencies using reference exchange rates. Works offline.

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Stopwatch

Precise online stopwatch with lap times. Start, stop, and record splits in your browser.

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VO2 Max Calculator

Estimate your VO2 max with the Cooper run test or Rockport walk test. Assess cardiovascular fitness.

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Waist-to-Hip Ratio Calculator

Calculate your WHR and assess cardiovascular health risk based on WHO guidelines.

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Net Worth Calculator

Calculate your net worth: total assets minus total liabilities. Clear financial snapshot.

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Inflation Calculator

See how inflation affects your money over time. Future cost and purchasing power projections.

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UK Tax Bracket Calculator

See your Income Tax per band for 2025/26. Includes Personal Allowance taper for high earners.

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CSS Beautifier / Formatter

Format and beautify minified or messy CSS into clean, readable code with proper indentation.

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Sitemap XML Generator

Generate a sitemap.xml for your website. Add URLs, set priority and frequency, then download.

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User Agent Parser

Parse and analyse any User Agent string. Identify browser, OS, device, and rendering engine.

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HTTP Status Code Lookup

Look up any HTTP status code. See the meaning, category, and usage. Search by code number or name.

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Aspect Ratio Calculator

Calculate the aspect ratio of any width and height. Find equivalent dimensions for resizing.

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CSS Gradient Generator

Generate beautiful CSS gradients visually. Pick colours, adjust angle, and copy CSS code.

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CSS Box Shadow Generator

Generate CSS box-shadow visually. Adjust offset, blur, spread, colour, and copy the code.

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XML Formatter & Validator

Format, beautify, or minify XML instantly. Paste XML and get clean, indented output.

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Number Base Converter

Convert numbers between decimal, binary, octal, and hexadecimal instantly as you type.

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Roman Numeral Converter

Convert between Roman numerals and decimal numbers. Supports values from 1 to 3,999.

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PX to REM Converter

Convert pixels to REM and EM units. Set a custom base font-size for accurate conversions.

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Electricity Cost Calculator

Calculate the running cost of any appliance. Enter wattage, usage hours, and electricity rate.

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Fuel Cost Calculator

Calculate how much fuel your journey will cost. Enter distance, MPG, and fuel price.

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Placeholder Image Generator

Generate custom placeholder images for wireframes and mockups. Set size, colours, and text.

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HTML Beautifier / Formatter

Format and beautify minified or messy HTML into clean, readable code with proper indentation.

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JavaScript Beautifier / Formatter

Format minified JavaScript into clean, readable code with proper indentation.

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SQL Formatter & Beautifier

Format SQL queries with proper indentation, keyword uppercasing, and line breaks.

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JSON to CSV Converter

Convert JSON arrays to CSV format. Download as .csv or copy to clipboard.

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CSV to JSON Converter

Convert CSV data to JSON format. First row is used as keys.

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Body Surface Area Calculator

Calculate your BSA using Du Bois, Mosteller, or Haycock formulas. Used in medical dosing.

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Random Number Generator

Generate cryptographically secure random numbers. Set range, count, and uniqueness.

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Screen Size & Resolution Checker

Check your screen resolution, viewport size, device pixel ratio, and display info.

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Chmod Calculator

Calculate Unix/Linux file permissions. Toggle read, write, execute for owner, group, and others.

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CSS Border Radius Generator

Generate CSS border-radius visually. Adjust each corner independently or link them together.

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Text Repeater

Repeat any text multiple times with optional separators. Great for testing and filler text.

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Temperature Converter

Convert between Celsius, Fahrenheit, and Kelvin instantly. Accurate temperature conversion.

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Length & Distance Converter

Convert between mm, cm, m, km, inches, feet, yards, and miles. Instant unit conversion.

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Weight & Mass Converter

Convert between mg, g, kg, tonnes, ounces, pounds, and stone instantly.

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Speed Distance Time Calculator

Calculate speed, distance, or time using the SDT formula. Supports km/h and mph.

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All tools work offline • No data stored • Privacy-first