Tools
Small, free, single-purpose tools. No account, no backend, nothing you enter leaves your browser.
Technical tools for SEO and web development: hreflang, JSON, CSV, robots.txt, sitemaps.
Hreflang Validator
Validate a URL/locale matrix and copy correct hreflang tags before you deploy.
Try Hreflang ValidatorJSON Parity Auditor
Compare two locale JSON files: missing keys, extra keys, broken placeholders.
Try JSON Parity AuditorCSV Data Dictionary
Turn a CSV export into a documented data dictionary: types, samples, null rates.
Try CSV Data DictionaryRobots.txt Linter
Simulate which URLs your robots.txt blocks and why, and catch the real mistakes that deindex a site by accident.
Try Robots.txt LinterSitemap Visual Explorer
Paste your sitemap.xml and instantly see how many URLs it has, how they are distributed by section, and which ones are duplicated.
Try Sitemap Visual ExplorerHTML Accessibility Outline
Paste an HTML fragment and catch real accessibility issues: headings, landmarks, images without alt, fields without a label, duplicate IDs.
Try HTML Accessibility OutlineGit Ignore Simulator
Paste your .gitignore and a list of paths: instantly see which ones are ignored and which exact line decides it.
Try Git Ignore SimulatorJSON Size Analyzer
Paste your JSON and see the serialized weight of every branch, ranked heaviest first.
Try JSON Size AnalyzerRedirect Chain Visualizer
Paste your exported redirect list and catch long chains, loops, and broken final destinations.
Try Redirect Chain VisualizerCanonical Tag Checker
Detect missing, duplicate or relative canonical tags in your page HTML before you deploy.
Try Canonical Tag CheckerSitemap Size Limit Checker
Check whether your XML sitemap exceeds the sitemaps.org 50,000 URL or 50MB limit.
Try Sitemap Size Limit CheckerOpen Graph Preview Checker
Paste a page's HTML and preview how its card will look when shared on social media.
Try Open Graph Preview CheckerUTM Campaign URL Builder
Build URLs with utm_source, utm_medium, and utm_campaign ready for your marketing campaigns.
Try UTM Campaign URL BuilderMeta Robots Tag Builder
Build the meta robots tag (noindex, nofollow, max-snippet, max-image-preview) instantly.
Try Meta Robots Tag BuilderCalculators and generators for everyday decisions: home renovation, moving, shopping, travel and events.
Home & renovation
Paint Calculator
Calculate the liters of paint and the can combination you need to paint one or more rooms.
Try Paint CalculatorTile Calculator
Calculate how many tiles and boxes you need based on the surface to tile and the tile size.
Try Tile CalculatorFlooring Calculator
Calculate how many boxes of laminate, parquet, or vinyl flooring you need for your room.
Try Flooring CalculatorSkirting Board Calculator
Calculate how many skirting board bars you need from the room perimeter or its dimensions.
Try Skirting Board CalculatorWallpaper Calculator
Calculate how many rolls of wallpaper you need based on your room and roll dimensions.
Try Wallpaper CalculatorCurtain Fabric Calculator
Work out how much fabric you need for your curtains
Try Curtain Fabric CalculatorFurniture & interior
Dining Table Size Calculator
What table size you need based on the number of guests
Try Dining Table Size CalculatorTV Size & Distance Calculator
What TV size to buy, or how far to sit
Try TV Size & Distance CalculatorMattress Size Calculator
Find the right mattress size and its UK/US equivalent
Try Mattress Size CalculatorMoving
Moving Boxes Calculator
How many boxes, tape rolls, and bubble wrap you need
Try Moving Boxes CalculatorStorage Unit Size Calculator
What size storage unit you need for what you are storing
Try Storage Unit Size CalculatorWill My Furniture Fit Through the Door?
Check if a piece of furniture fits through a door before moving day
Try Will My Furniture Fit Through the Door?Appliances
Fridge Capacity Calculator
How many liters of fridge you need for your household
Try Fridge Capacity CalculatorWashing Machine Capacity Calculator
How many kg of washing machine you need for your household
Try Washing Machine Capacity CalculatorDehumidifier Size Calculator
How many liters a day you need based on the room
Try Dehumidifier Size CalculatorGarden & outdoor
Concrete calculator
Calculate the concrete volume and cement, sand and gravel mix you need.
Try Concrete calculatorPaving slabs calculator
Calculate how many slabs or pavers you need for your surface.
Try Paving slabs calculatorArtificial grass calculator
Calculate the linear meters of artificial grass roll you need.
Try Artificial grass calculatorGarden fence calculator
Calculate how many panels and posts you need for your fence.
Try Garden fence calculatorHedge plants calculator
Calculate how many plants you need for your hedge by species.
Try Hedge plants calculatorMulch & Topsoil Calculator
Work out how many liters and bags of mulch, topsoil or potting substrate you need for your garden or planters.
Try Mulch & Topsoil CalculatorDIY
Plasterboard Calculator
Work out how many plasterboard sheets and screws you need
Try Plasterboard CalculatorSilicone Sealant Calculator
Work out how many silicone cartridges you need for your joints
Try Silicone Sealant CalculatorCrafts
Epoxy Resin Ratio Calculator
Enter the total volume you need (or your mold's dimensions) and the mix ratio to see exactly how much resin and hardener to measure out.
Try Epoxy Resin Ratio CalculatorYarn Amount Calculator
Pick your project type, enter its dimensions and yarn thickness, and see how many grams (and skeins) of yarn you'll need.
Try Yarn Amount CalculatorFabric Yardage Calculator
Pick your project type, enter the piece dimensions and your fabric's width, and see exactly how much fabric to buy.
Try Fabric Yardage CalculatorCandle Fragrance Load Calculator
Enter your wax weight (or mold volume), wax type, and desired fragrance load to see exactly how much fragrance oil to add.
Try Candle Fragrance Load CalculatorCross Stitch Fabric Calculator
Enter your pattern's stitch count, the fabric count (holes per inch), and your desired margin to see the fabric size you need.
Try Cross Stitch Fabric CalculatorSizes & shopping
Shoe Size Converter
Convert shoe sizes between EU, UK, US (men and women) and centimeters instantly.
Try Shoe Size ConverterClothing Size Converter
Convert women's and men's clothing sizes between label (XS-6XL), EU, UK, US, IT and FR.
Try Clothing Size ConverterRing Size Calculator
Work out your ring size (EU, ES, UK, US) from your finger's circumference or diameter.
Try Ring Size CalculatorSuitcase Volume Calculator
Calculate and compare how many liters your suitcases hold based on their dimensions.
Try Suitcase Volume CalculatorScreen Size Calculator
Real height and width of a screen from its diagonal, plus an inches ↔ cm converter.
Try Screen Size CalculatorElectronics & spending
Price Per Unit Comparator
Compare up to 3 products by real price per kilo, liter, or unit and find out which one is actually cheaper.
Try Price Per Unit ComparatorStacked Discount Calculator
Apply up to 3 successive discounts in cascade and calculate the real final price.
Try Stacked Discount CalculatorDevice Charging Time Calculator
Calculate how long your phone, laptop, or device will take to fully charge.
Try Device Charging Time CalculatorAppliance Electricity Cost Calculator
Calculate what it really costs to keep an appliance running per day, week, month, or year.
Try Appliance Electricity Cost CalculatorEV Charging Cost Calculator
Enter your battery capacity, the starting and target charge level, and the price per kWh to find out how much energy you need and how much it will cost.
Try EV Charging Cost CalculatorCar & driving
Car True Cost Per Mile Calculator
Enter the purchase price, annual expenses, and fuel consumption to calculate what your car really costs you per kilometer or mile.
Try Car True Cost Per Mile CalculatorTire Size Comparison Calculator
Enter the original and new tire size to see the diameter difference and whether it affects speedometer accuracy.
Try Tire Size Comparison CalculatorOil Change Interval Calculator
Enter your oil type, the mileage since your last change, and the date to find out when your next oil change is due.
Try Oil Change Interval CalculatorTire Pressure by Load Calculator
Enter the base pressure, the additional weight (luggage, passengers, or a trailer), and the vehicle's empty weight to calculate the adjusted pressure.
Try Tire Pressure by Load CalculatorTravel
Fuel Trip Cost Calculator
Enter the trip distance, your car's average consumption and the fuel price to find out how much the trip will cost, in total and per person.
Try Fuel Trip Cost CalculatorLuggage Checklist Generator
Choose the trip type, the number of nights and travelers to generate a complete, checkable packing list.
Try Luggage Checklist GeneratorEvents
Bill Split Calculator
Enter the total amount, the number of people and the tip you want to add to find out how much each person has to pay.
Try Bill Split CalculatorParty Food Calculator
Choose the type of event and enter the number of guests to find out how much food and drink you need to buy.
Try Party Food CalculatorWedding Budget Calculator
Enter your total budget and adjust each category percentage to see how much you can spend on catering, venue, photography, music and more.
Try Wedding Budget CalculatorGift Budget Calculator
Pick the occasion and how close you are to the person to see a suggested spending range for the gift.
Try Gift Budget CalculatorEvent Seating Calculator
Enter your guest count, how many people fit per table, and a spare-chair percentage to find out how much furniture you need.
Try Event Seating CalculatorLetters & documents
Subscription Cancellation Letter Generator
Fill in your contract details and generate a cancellation letter ready to send by email or post.
Try Subscription Cancellation Letter GeneratorConsumer Claim Letter Generator
Fill in your order details and the type of incident to generate a claim letter ready to send.
Try Consumer Claim Letter GeneratorWarranty Claim Letter Generator
Fill in your purchase details and the issue to generate a warranty claim letter ready to send.
Try Warranty Claim Letter GeneratorPrice Match Request Letter Generator
Fill in your purchase details and the competitor's price to generate a price match request letter.
Try Price Match Request Letter GeneratorProductivity
Meeting Cost Calculator
Calculate what a meeting really costs based on attendees, their salary, and duration.
Try Meeting Cost CalculatorBook Reading Pace Calculator
Calculate how many pages to read per day to finish a book on time.
Try Book Reading Pace CalculatorScreenplay Runtime Calculator
Estimate how long a movie or episode will run based on the screenplay page count.
Try Screenplay Runtime CalculatorFinance
Income-Proportional Bill Split Calculator
Enter the total expense and each person's income to split it fairly and proportionally.
Try Income-Proportional Bill Split CalculatorCooking
Cooking Ingredient Substitution Calculator
Pick the ingredient you want to substitute and the amount to calculate how much substitute you need.
Try Cooking Ingredient Substitution CalculatorEducation
Moodle Gradebook Interpreter
Turns Moodle exports into visual dashboards in 20 seconds, 100% in your browser.
Try Moodle Gradebook Interpreter