Free online tools that just work
Calculators, checkers and generators for SEO, marketing, money, study, visas and health. No sign-up, no download, and nothing you type leaves your browser.
- Free to use
- No account needed
- Runs in your browser
- Sources shown for every rule
SEO
- Anchor Text Ratio CheckerSee the mix of branded, exact match, URL and generic backlink anchors.
- Disavow File GeneratorBuild a valid Google disavow.txt file from a list of spammy links.
- Duplicate Content CheckerCompare two texts and see how much is duplicated, sentence by sentence.
- FAQ Schema GeneratorGenerate valid FAQPage JSON-LD structured data from your questions and answers.
- Heading Structure CheckerCheck H1 to H6 headings for a missing H1, skipped levels and empty headings.
- Hreflang Tag GeneratorHreflang link tags, sitemap entries or HTTP headers for multilingual sites.
- Image Alt Text CheckerFind images with missing, empty or weak alt text in your HTML.
- Keyword Cluster GrouperGroup a keyword list into clusters by shared words, for pages or ad groups.
- Keyword Density CheckerFind the most used words and phrases in your text and their density.
- Local SEO Citation ChecklistTrack the UK or US business listings to claim, with your NAP ready to copy.
- Meta Tag and Open Graph GeneratorGenerate title, description, Open Graph and X card tags with previews.
- Meta Title & Description Length CheckerCheck title tag and meta description length in characters and pixels, with a Google result preview.
- Robots.txt GeneratorCreate a robots.txt file with sitemap, WordPress rules and optional AI crawler blocks.
- Robots.txt TesterTest whether URLs are allowed or blocked by robots.txt for any crawler.
- Schema Markup Generator (JSON-LD)Generate JSON-LD for Organization, LocalBusiness, Article, Product and Event pages.
- SERP Snippet PreviewPreview your Google title, URL and description with pixel-width truncation checks.
- Sitemap ValidatorCheck an XML sitemap for errors: format, URLs, dates, limits and duplicates.
- Text-to-HTML Ratio CheckerVisible text versus code on a page, with inline script and CSS sizes.
- URL Slug GeneratorClean, short URL slugs from titles, with accents and stop words removed.
- URL Tracking RemoverStrip UTM tags, fbclid, gclid and other tracking from links.
- XML Sitemap GeneratorTurn a list of URLs into a valid sitemap.xml file.
Marketing & Ads
- A/B Test Sample Size CalculatorHow many visitors your A/B test needs, and how long to run it.
- A/B Test Significance CalculatorCheck whether the difference between two conversion rates is statistically significant.
- Ad Budget PlannerWork out the monthly ad budget you need from your goal, conversion rate and cost per click.
- Amazon FBA CalculatorProfit per unit after Amazon referral, fulfillment and storage fees.
- Average Order Value CalculatorAOV, conversion rate and the revenue gain from bigger baskets.
- Barcode GeneratorCode 128, EAN-13 and UPC barcodes as PNG or SVG.
- Break-Even ROAS CalculatorFind the ROAS and CPA you need to break even or hit a target margin.
- Conversion Rate CalculatorConversion rate with a confidence range, revenue per visitor and targets.
- CPC, CPM & CPA CalculatorCost per click, per thousand impressions and per conversion, plus CTR and conversion rate.
- CTR CalculatorClick-through rate, CPC and CPM from impressions, clicks and spend.
- Customer Acquisition Cost CalculatorCompare customer acquisition cost by channel, with blended CAC and LTV:CAC.
- Customer Lifetime Value CalculatorWork out customer lifetime value, LTV:CAC ratio and CAC payback.
- Depop Fee CalculatorDepop fees and payout for UK and US sellers.
- eBay Fee CalculatoreBay US and UK selling fees and profit after fees.
- Emoji PickerSearch and copy emoji for posts, captions and messages.
- Etsy Fee CalculatorEtsy fees and profit per sale for US and UK shops.
- Facebook Post PreviewPreview how a post, link card and image may look in the feed.
- Fancy Text GeneratorInstagram fonts to copy and paste: bold, script, gothic and more.
- Funnel Drop-Off CalculatorStep-by-step funnel conversion and the stage where most people leave.
- GA4 Event Name ValidatorCheck GA4 event and parameter names against Google’s rules and reserved names.
- Google Ads Headline CheckerCheck responsive search ad headlines and descriptions against Google limits.
- Google Ads Quality Score ExplainerSee what to fix first from your expected CTR, ad relevance and landing page ratings.
- Google Tag Manager Snippet GeneratorGet the Google Tag Manager install code for your container ID.
- Influencer Rate CalculatorA fair starting price for sponsored posts, Reels, TikToks and videos.
- Instagram Engagement Rate CalculatorEngagement rate by followers and reach from your recent posts.
- Keyword CombinerCombine keyword lists into every combination, with match types.
- Keyword Match Type ConverterConvert keywords to broad, phrase or exact match, or negatives.
- LinkedIn Text FormatterBold, italic and bullets for LinkedIn posts, with a preview.
- Marketing Audit ChecklistA 24-point marketing checklist with a score and the area to fix first.
- Marketing ROI CalculatorROI and ROAS for each marketing channel, after your gross margin.
- Markup CalculatorSelling price from cost and markup, with margin and profit.
- Meta Pixel Event Code GeneratorMeta Pixel base code and standard event snippets like Purchase and Lead.
- Negative Keyword List BuilderBuild negative keyword lists from common themes and your search terms.
- PayPal Fee CalculatorPayPal fees in the US and UK, what you receive and what to charge.
- Performance Max Asset CheckerCheck a Performance Max asset group against Google’s requirements.
- Privacy Policy GeneratorPlain-English privacy policy for UK GDPR, EU GDPR and more.
- Product Pricing CalculatorSelling price from cost with a target margin or markup, plus VAT.
- ROAS CalculatorWork out ROAS, profit after ad spend, break-even ROAS and the ROAS you need for a profit target.
- Shopify Profit CalculatorProfit per order and per month after Shopify fees, costs and ads.
- Social Media Content CalendarPlan posts by date and platform, then download as CSV or print.
- Social Media Image Size GuideRecommended image sizes for Instagram, Facebook, X, LinkedIn, YouTube, TikTok and Pinterest.
- Stripe Fee CalculatorSee Stripe fees for UK and US accounts, and what to charge to receive a set amount.
- Terms and Conditions GeneratorWebsite and online shop terms with UK consumer rights.
- TikTok Engagement Rate CalculatorEngagement rate by views and followers for TikTok videos.
- UTM Campaign URL BuilderBuild tagged campaign URLs for Google Analytics 4 with source, medium, campaign, term and content.
- WhatsApp Link GeneratorCreate a wa.me click-to-chat link with a message and QR code.
- X (Twitter) Character CounterCount characters the way X does, with links at 23 and emoji at 2.
- YouTube Money CalculatorEstimate YouTube earnings from views and RPM, for long-form and Shorts.
Writing & Text
- Case ConverterConvert text to upper, lower, title, sentence, camel, snake or kebab case.
- Email Address ValidatorCheck email addresses for format errors, typos and duplicates.
- Email Signature GeneratorProfessional HTML email signature for Gmail, Outlook and Apple Mail.
- Email Spam Word CheckerFind spam trigger words, ALL CAPS and other red flags in an email.
- Email Subject Line TesterScore your subject line and preview text, with a phone inbox preview.
- Headline AnalyzerScore a headline for length, numbers, power words and reader focus.
- Readability CheckerCheck reading ease, sentence length, passive phrases and filler words in your writing.
- Readability Score CheckerFlesch Reading Ease, grade level and long sentences in your text.
- Reading Time CalculatorHow long a text takes to read, speak and type.
- Text Diff CheckerCompare two versions of a text and highlight what changed.
- Word CounterCount words, characters, sentences and paragraphs, with reading and speaking time.
AI
- AI API Cost CalculatorMonthly API cost for Claude, GPT and Gemini models from your token usage.
- AI Crawler Robots.txt GeneratorBlock or allow GPTBot, ClaudeBot and other AI crawlers in robots.txt.
- AI Image Prompt BuilderBuild prompts for ChatGPT, Midjourney and Stable Diffusion images.
- AI Marketing Prompt Library24 copy-ready AI prompts for ads, SEO, email, social, strategy and analytics.
- AI ROI CalculatorEstimate hours and money saved by handing repeatable work to AI, and how fast it pays back.
- AI Task AuditSee how much of your week is execution AI can take on, versus judgement and people work.
- llms.txt GeneratorCreate an llms.txt file that points AI tools to your key pages.
Money & Finance
- 401(k) CalculatorProject your 401(k) with employer match and 2026 IRS limits.
- 50/30/20 Budget PlannerSplit your take-home pay into needs, wants and savings, and track your spending.
- Australia Income Tax CalculatorAustralian tax and take-home pay for 2026–27 with the new 15% rate and Medicare levy.
- Canada Income Tax Calculator2026 take-home pay by province with federal and provincial tax, CPP and EI.
- Car Finance CalculatorMonthly PCP or HP payments, the balloon, total payable and cost of credit.
- Compound Interest CalculatorSee how savings grow with monthly contributions, compounding and inflation.
- Credit Card Payoff CalculatorHow long it takes to clear a card, the interest you pay, and how much paying more saves.
- Crypto Profit CalculatorProfit, ROI and break-even price after fees, with a UK tax estimate.
- Currency ConverterConvert between 25 currencies with daily mid-market rates.
- Discount and Markup CalculatorSale prices, double discounts, markup and margin in one place.
- Germany Gross to Net Salary CalculatorNet salary in Germany for 2026 after income tax and social contributions.
- India EPF CalculatorEPF balance at retirement with the 8.25% rate and the EPS split.
- India GST CalculatorAdd or remove GST with CGST, SGST and IGST split, including the 5%, 18% and 40% slabs.
- India HRA Exemption CalculatorWork out your HRA exemption under the old regime, including the new 50% cities.
- India Income Tax Calculator (Old vs New Regime)Compare old and new regime tax for FY 2026–27 with deductions, rebate and cess.
- India SIP CalculatorEstimate mutual fund SIP growth with an optional yearly step-up.
- Invoice GeneratorCreate an invoice with tax and discount, then print or save as PDF.
- Loan / EMI CalculatorWork out your monthly loan repayment, total interest and a year-by-year repayment schedule.
- Mortgage Affordability CalculatorSee how much you could borrow on your income, with repayments and a rate-rise test.
- Mortgage CalculatorWork out monthly mortgage payments, total interest, loan to value and the effect of overpaying.
- Pakistan Electricity Bill CalculatorEstimate your bill from units with 2026 slab rates and taxes.
- Pakistan Salary Tax CalculatorTax on your salary for 2026–27 under the new Finance Act slabs, monthly and yearly.
- Profit Margin CalculatorGross margin and markup from cost and price, or the price for a target margin.
- Quote and Estimate GeneratorCreate a professional quote or estimate, then print or save as PDF.
- Retirement CalculatorSee if your savings are on track for the retirement income you want.
- Salary to Hourly CalculatorConvert a salary to hourly, daily, weekly and monthly pay, before and after UK tax.
- Savings Goal CalculatorHow much to save each month or week to reach a goal by a date, with interest.
- Scottish Income Tax CalculatorScottish Income Tax 2026/27 band by band, compared with the rest of the UK.
- UAE VAT CalculatorAdd or remove 5% UAE VAT from any amount in dirhams.
- UK Capital Gains Tax CalculatorCapital Gains Tax for 2026/27 with the £3,000 allowance and the 18% and 24% rates.
- UK Inflation CalculatorWhat a past amount of money is worth today, using ONS CPI data.
- UK National Insurance CalculatorEmployee, employer and self-employed National Insurance for 2026/27.
- UK Pension CalculatorProject your pension pot and retirement income in today’s money, with the State Pension.
- UK Self-Employed Tax CalculatorIncome Tax and Class 4 NI on self-employed profits for 2026/27.
- UK Stamp Duty CalculatorStamp Duty, LBTT and LTT for England, NI, Scotland and Wales, with first-time buyer and second-home rates.
- UK Statutory Maternity Pay CalculatorWork out your SMP for 39 weeks, with key dates, for 2026/27.
- UK Student Loan Repayment CalculatorMonthly repayments for Plans 1, 2, 4, 5 and postgraduate loans, and whether you will clear it.
- UK Take-Home Pay Calculator 2026/27Work out Income Tax, National Insurance, student loan and take-home pay for 2026/27, including Scotland.
- UK VAT CalculatorAdd or remove VAT at 20%, 5% or 0%, with net, VAT and gross amounts.
- US Federal Income Tax Calculator2026 federal income tax, bracket and effective rate by filing status.
- US Mortgage Calculator (PITI)Monthly mortgage payment with property tax, insurance, PMI and HOA, plus the income you need.
- US Paycheck Calculator 2026Estimate take-home pay per paycheck with 2026 federal tax, FICA, state tax and 401(k).
- US Sales Tax CalculatorAdd or remove sales tax for any US state, with 2026 rates.
- Zakat CalculatorZakat on gold, silver, cash and savings using today’s nisab.
Study & Visas
- Australia Skilled Migration Points CalculatorAdd up your points for Australian skilled visas 189, 190 and 491 against the 65 pass mark.
- Australia Student Visa Funds CalculatorHow much money to show for an Australian student visa (subclass 500).
- Canada Citizenship Physical Presence CalculatorCount your days in Canada towards the 1,095 needed for citizenship.
- Canada CRS Score CalculatorEstimate your Express Entry CRS score under the rules in force from 3 November 2026.
- Canada Study Permit Proof of FundsTotal the funds you need to show for a Canadian study permit, using the September 2026 amounts.
- CGPA to Percentage ConverterConvert CGPA to percentage with CBSE, VTU and other formulas.
- Chevening Eligibility CheckerCheck the Chevening Scholarship criteria before you apply.
- EU Blue Card Salary CheckerCheck a salary against the 2026 EU Blue Card thresholds by country.
- Germany Blocked Account CalculatorHow much to deposit in a German blocked account for a student visa.
- Germany Opportunity Card Points CalculatorCount your Chancenkarte points and check if you qualify.
- GPA CalculatorWork out term and cumulative GPA on the 4.0 scale from grades and credits.
- GPA to UK Degree Classification ConverterConvert your GPA, CGPA or percentage to a UK degree class.
- IELTS Band Score CalculatorConvert IELTS Listening and Reading raw scores to bands and work out your overall band.
- IELTS, TOEFL, PTE and Duolingo Score ConverterCompare English test scores using the official concordance tables.
- Life in the UK Practice TestFree 24-question Life in the UK mock test with instant marking.
- NZ Skilled Migrant Points CalculatorCheck the 6 points for New Zealand residence from qualification, registration or income.
- Recommendation Letter GeneratorA reference letter for a university, scholarship or job application.
- Schengen 90/180 Day CalculatorCount the days you have used in the Schengen Area and see how long you can still stay.
- Study Abroad Cost CalculatorTotal budget for studying abroad, including tuition and living costs.
- UK Citizenship Eligibility CheckerCheck the residence and absence rules for British citizenship.
- UK ILR Absence CalculatorCheck your trips against the 180 days in any 12 months limit for UK settlement.
- UK ILR Eligibility Date CalculatorEarliest date you can apply for indefinite leave to remain.
- UK Immigration Health Surcharge CalculatorImmigration Health Surcharge for you and your family, with part-year rules.
- UK Skilled Worker Points CalculatorCheck the 70 points, salary floor and going rate for a UK Skilled Worker visa.
- UK Student Visa Funds CalculatorWork out how much money you need to show for a UK Student visa, with fees and living costs.
- UK Visa Fee CalculatorTotal UK visa cost with the April 2026 fees and the health surcharge.
- US Citizenship (N-400) Eligibility CalculatorEarliest N-400 filing date, physical presence and continuous residence.
Jobs & CVs
- Cover Letter BuilderWrite a tailored cover letter from your strongest results in a few minutes.
- CV BuilderBuild a clean, ATS-friendly CV with a live preview and save it as a PDF.
- Freelance Rate CalculatorMinimum hourly and day rate to hit your income as a freelancer.
- Resignation Letter GeneratorA professional resignation letter with your last working day.
- Resume Keyword MatcherCompare your CV with a job description and find missing keywords.
- Saudi End-of-Service CalculatorSaudi end-of-service award, including reduced amounts after resignation.
- STAR Interview Answer BuilderBuild STAR answers to behavioural interview questions.
- UAE Gratuity CalculatorEnd-of-service gratuity under the UAE Labour Law, from basic salary and service dates.
- UK Holiday Entitlement CalculatorStatutory holiday in days or hours, pro rata, and the 12.07% irregular-hours rule.
- UK Minimum Wage CheckerCheck your pay against the April 2026 National Minimum and Living Wage.
- UK Notice Period CalculatorStatutory and contractual notice, and the date your notice ends.
- UK Redundancy Pay CalculatorWork out statutory redundancy pay from your age, service and weekly pay, using the April 2026 cap.
Health & Fitness
- Blood Pressure CheckerCheck a reading against UK (NHS) and US (AHA) categories.
- BMI CalculatorWork out your body mass index in metric or imperial units, with NHS weight categories.
- BMR & TDEE CalculatorBasal metabolic rate and daily calories at five activity levels.
- Body Fat CalculatorEstimate body fat percentage with a tape measure using the US Navy method.
- Box Breathing ExerciseGuided box, 4-7-8 and calm breathing with an animated timer.
- Calorie Calculator (TDEE)Estimate the calories you need to maintain, lose or gain weight, with safe minimums.
- Calorie Deficit CalculatorSafe daily calories to lose weight, and how long it will take.
- Calories Burned CalculatorCalories burned in walking, running, gym and everyday activities.
- Couch to 5K Plan9-week running plan with your own dates and a progress tracker.
- Habit TrackerTrack daily habits with streaks over 14 days.
- HbA1c and Blood Sugar ConverterConvert HbA1c between mmol/mol and %, and blood sugar between mmol/L and mg/dL.
- Heart Rate Zone CalculatorMax heart rate and five training zones, with the Karvonen method.
- HIIT & Tabata TimerInterval timer with beeps for Tabata and HIIT workouts.
- Ideal Weight CalculatorHealthy weight range for your height in kg and stone, plus classic formulas.
- Intermittent Fasting TimerTrack 16:8 and other fasts with a live countdown.
- Macro CalculatorDaily calories and protein, carbs and fat for losing fat, maintaining or building muscle.
- Marathon Training PlanA week-by-week marathon or half marathon plan built around your race date.
- One-Rep Max (1RM) CalculatorEstimate your 1RM from any set and get training weights by percentage.
- Ovulation CalculatorEstimate ovulation and your fertile window for the next three cycles.
- Period TrackerLog your periods and predict the next one, with your fertile window.
- Pregnancy Due Date CalculatorEstimate your due date, weeks pregnant, trimester and scan dates.
- Pregnancy Week by Week TrackerHow many weeks pregnant you are, with key dates.
- Protein Intake CalculatorHow much protein you need a day for your weight and goal.
- Race Time PredictorPredict 5K, 10K, half and full marathon times from a recent race.
- Running Pace CalculatorPace per km or mile, speed and equivalent 5K, 10K, half and marathon times.
- Sleep CalculatorBest times to go to bed or wake up, based on 90-minute sleep cycles.
- Smoking Cost CalculatorWhat smoking costs you, and what you have saved since quitting.
- Steps to Km, Miles & Calories ConverterTurn steps into kilometres, miles and calories burned.
- UK Alcohol Units CalculatorCount your weekly alcohol units against the 14-unit guideline.
- Water Intake CalculatorHow much to drink each day for your weight, exercise and climate.
- Weekly Meal PlannerPlan the week’s meals with a shopping list.
- Weight Progress TrackerLog your weight and see your trend on a chart.
- Workout Split GeneratorWeekly workout split for your days and equipment.
PDF & Images
- Add Watermark to PDFStamp text like CONFIDENTIAL or DRAFT on every page of a PDF.
- Colour Palette GeneratorGenerate colour palettes with hex codes and CSS variables.
- Experience Letter GeneratorA work experience letter with dates, service length and duties.
- Favicon Generatorfavicon.ico and app icons from an image or text.
- HEIC to JPG ConverterConvert iPhone HEIC photos to JPG or PNG in your browser.
- Image CompressorShrink JPG, PNG and WebP images in your browser, with before-and-after sizes.
- Image Format ConverterConvert PNG, JPG and WebP images in your browser.
- Image ResizerResize images to exact pixel dimensions, keeping proportions if you like.
- Image to Text (OCR)Extract text from photos and screenshots in 10 languages, privately.
- JPG to PDFTurn JPG or PNG images into a single PDF, on A4, Letter or fitted pages.
- MP4 to MP3 ConverterExtract the audio from a video as an MP3, right in your browser.
- Passport Photo MakerMake a passport or visa photo at the right size for the UK, US, Schengen and more, plus a 6×4 print sheet.
- PDF MergerCombine several PDF files into one, in the order you choose, without uploading them.
- PDF SplitterExtract pages or page ranges from a PDF, or split every page into its own file.
- PDF to JPG ConverterTurn PDF pages into JPG or PNG images, up to 300 DPI.
- QR Code GeneratorMake a QR code for any link or text and download it as a PNG.
- Remove Pages from PDFDelete pages from a PDF in your browser and download the rest.
- Signature MakerDraw or type your signature and download a transparent PNG.
- Text to SpeechRead any text aloud with your device’s voices, at the speed you choose.
Everyday
- Age CalculatorWork out exact age in years, months and days, and days until the next birthday.
- Character CounterCount characters, words and lines, with limits for X, SMS and meta descriptions.
- Date Difference CalculatorCount the days, weeks and weekdays between two dates.
- Hijri Date ConverterConvert between Hijri (Islamic) and Gregorian dates using Umm al-Qura.
- JSON Formatter & ValidatorFormat, minify and validate JSON in your browser, with the line of any error.
- Password GeneratorGenerate strong random passwords on your device, with a strength estimate.
- Percentage CalculatorWork out a percentage of a number, what percent one number is of another, and percentage change.
- Random Name Picker WheelSpin a wheel to pick a random name or option.
- Time Zone ConverterConvert a time across 20+ cities with daylight saving applied automatically.
- Typing Speed TestMeasure your words per minute and accuracy.
- Unit ConverterConvert length, weight, volume, area, speed and temperature between metric and imperial.
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How these tools are made
Each tool is built to answer one question quickly, with the formula or rule explained underneath so you can check the result yourself. Tools that depend on official rules, such as visa limits or health thresholds, link to the source and show when they were last checked. Read the editorial policy for how tools are tested and corrected.
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