# Hopi

> Free online calculators, converters, generators and tools. All 225 tools run entirely in your browser (no sign-up, nothing you enter leaves your device), UK-focused where it matters. Many are also callable by AI agents via WebMCP - see https://hopi.co.uk/webmcp.json.

Full reference with each tool's FAQs: https://hopi.co.uk/llms-full.txt

## Maths & percentages
- [Discount & sale price calculator](https://hopi.co.uk/discount-calculator/): Sale price, savings and real discount.
- [Fraction calculator](https://hopi.co.uk/fraction-calculator/): Add, subtract, multiply or divide fractions.
- [Fraction to decimal converter](https://hopi.co.uk/fraction-to-decimal/): Fractions to decimals and back, simplified.
- [Mean, median & mode calculator](https://hopi.co.uk/average-calculator/): Mean, median, mode and more from any list.
- [Percentage calculator](https://hopi.co.uk/percentage-calculator/): Work out any percentage, three ways.
- [Percentage change calculator](https://hopi.co.uk/percentage-change-calculator/): Increase or decrease between two values.
- [Percentage decrease calculator](https://hopi.co.uk/percentage-decrease-calculator/): Take a percentage off any starting number.
- [Percentage difference calculator](https://hopi.co.uk/percentage-difference-calculator/): Symmetric difference between two values.
- [Percentage increase calculator](https://hopi.co.uk/percentage-increase-calculator/): Add a percentage rise to any starting number.
- [Prime number & factor calculator](https://hopi.co.uk/prime-factorisation-calculator/): Is it prime? Factors and divisors.
- [Ratio calculator](https://hopi.co.uk/ratio-calculator/): Simplify ratios or find the missing value.
- [Right-angle triangle calculator](https://hopi.co.uk/triangle-calculator/): Solve a right triangle from any two values.
- [Roman numerals converter](https://hopi.co.uk/roman-numerals-converter/): Numbers to Roman numerals and back.
- [Rounding & significant figures calculator](https://hopi.co.uk/rounding-calculator/): Round to decimal places or sig figs.
- [Scientific calculator](https://hopi.co.uk/scientific-calculator/): Trig, powers, logs and more.
- [Standard deviation calculator](https://hopi.co.uk/standard-deviation-calculator/): Sample and population sd from your data.

## Money & UK
- [Bill splitter](https://hopi.co.uk/bill-splitter/): Split a bill fairly, item by item.
- [CAGR calculator](https://hopi.co.uk/cagr-calculator/): Annual growth rate from start and end.
- [Compound interest calculator](https://hopi.co.uk/compound-interest-calculator/): Watch savings grow year by year.
- [Currency converter](https://hopi.co.uk/currency-converter/): 150+ currencies at live hourly mid-market rates.
- [Day rate to salary calculator](https://hopi.co.uk/day-rate-calculator/): Day rate to annual salary and back.
- [Energy running cost calculator](https://hopi.co.uk/energy-cost-calculator/): Appliance running costs per day and year.
- [Fuel cost calculator](https://hopi.co.uk/fuel-cost-calculator/): What any journey costs in fuel.
- [Holiday entitlement calculator](https://hopi.co.uk/holiday-entitlement-calculator/): Statutory annual leave for your pattern.
- [Hourly wage to salary converter](https://hopi.co.uk/hourly-to-salary/): Hourly rate to annual salary and back.
- [Loan repayment calculator](https://hopi.co.uk/loan-calculator/): Monthly payments and true cost of a loan.
- [Margin & markup calculator](https://hopi.co.uk/margin-calculator/): Profit, margin and markup from two numbers.
- [Mortgage overpayment calculator](https://hopi.co.uk/mortgage-overpayment-calculator/): Time and interest saved by paying extra.
- [Mortgage repayment calculator](https://hopi.co.uk/mortgage-calculator/): Monthly payment, total interest, total cost.
- [National Insurance calculator](https://hopi.co.uk/national-insurance-calculator/): Employee NI on your salary, 2026/27.
- [Net to gross salary calculator](https://hopi.co.uk/net-to-gross/): The gross salary behind your take-home target.
- [Overtime pay calculator](https://hopi.co.uk/overtime-pay-calculator/): Pay at standard, time and a half and double.
- [Pro-rata salary calculator](https://hopi.co.uk/pro-rata-salary-calculator/): Full-time salary scaled to your hours.
- [Redundancy pay calculator](https://hopi.co.uk/redundancy-pay-calculator/): Statutory redundancy pay, 2026 caps.
- [Savings goal calculator](https://hopi.co.uk/savings-goal-calculator/): How long to reach your savings goal.
- [Stamp duty calculator](https://hopi.co.uk/stamp-duty-calculator/): SDLT for your next move, band by band.
- [Student loan repayment calculator](https://hopi.co.uk/student-loan-calculator/): Monthly student loan repayments by plan.
- [Take-home pay calculator](https://hopi.co.uk/take-home-pay-calculator/): Your salary after tax and NI, 2026/27.
- [Tip calculator](https://hopi.co.uk/tip-calculator/): Tip, total and each person's share.
- [UCAS points calculator](https://hopi.co.uk/ucas-points-calculator/): A-level grades to UCAS tariff points.
- [UK inflation calculator](https://hopi.co.uk/inflation-calculator/): What past money is worth today, via CPI.
- [Unit price comparison](https://hopi.co.uk/unit-price-calculator/): Compare price per kg, litre or item.
- [VAT calculator](https://hopi.co.uk/vat-calculator/): Add or remove 20% VAT from any amount.

## Text & writing
- [Alphabetical order sorter](https://hopi.co.uk/alphabetical-order/): Sort any list A to Z or Z to A.
- [Caesar cipher & ROT13](https://hopi.co.uk/caesar-cipher/): Encode or decode with a Caesar shift.
- [Case converter](https://hopi.co.uk/case-converter/): Switch text between four cases in a click.
- [Character counter](https://hopi.co.uk/character-counter/): Live character counts and limit checks.
- [Duplicate line remover](https://hopi.co.uk/remove-duplicate-lines/): Delete repeated lines, keep the order.
- [Emoji remover](https://hopi.co.uk/emoji-remover/): Strip every emoji and see how many went.
- [Find and replace](https://hopi.co.uk/find-and-replace/): Search and replace with regex and live counts.
- [Lorem ipsum generator](https://hopi.co.uk/lorem-ipsum-generator/): Classic placeholder text in one click.
- [Morse code translator](https://hopi.co.uk/morse-code-translator/): Text to Morse and back, live.
- [NATO phonetic alphabet translator](https://hopi.co.uk/nato-phonetic-alphabet/): Spell words as Alfa Bravo Charlie.
- [Online notepad](https://hopi.co.uk/online-notepad/): Jot notes that autosave in your browser.
- [Reading time calculator](https://hopi.co.uk/reading-time-calculator/): How long your text takes to read or speak.
- [Remove extra spaces](https://hopi.co.uk/remove-extra-spaces/): Collapse repeated spaces and tidy lines.
- [Remove line breaks](https://hopi.co.uk/remove-line-breaks/): Turn broken lines back into flowing text.
- [Reverse text generator](https://hopi.co.uk/reverse-text/): Flip characters, word order or letters.
- [Small text generator](https://hopi.co.uk/small-text-generator/): Tiny superscript, small caps and wide text.
- [Special characters to copy](https://hopi.co.uk/special-characters/): One-tap copy for symbols and accents.
- [Text repeater](https://hopi.co.uk/text-repeater/): Repeat text with separators and numbers.
- [Text splitter](https://hopi.co.uk/text-splitter/): Split text into chunks or at a delimiter.
- [Upside down text](https://hopi.co.uk/upside-down-text/): Flip your text upside down to paste anywhere.
- [Word counter](https://hopi.co.uk/word-counter/): Words, characters and reading time, live.
- [Word frequency counter](https://hopi.co.uk/word-frequency-counter/): Your most used words, counted live.

## Colour & design
- [CMYK to RGB converter](https://hopi.co.uk/cmyk-to-rgb/): CMYK values to RGB and hex, both ways.
- [CSS gradient generator](https://hopi.co.uk/css-gradient-generator/): Two colours to ready-made gradient CSS.
- [Colour name finder](https://hopi.co.uk/colour-name-finder/): Nearest CSS colour name for any hex code.
- [Colour palette from image](https://hopi.co.uk/image-palette/): Get 6 dominant colours from any photo.
- [Colour palette generator](https://hopi.co.uk/colour-palette-generator/): Five-swatch palettes from one base colour.
- [Colour picker](https://hopi.co.uk/colour-picker/): Pick a colour, get hex, RGB and HSL.
- [Contrast checker](https://hopi.co.uk/contrast-checker/): WCAG contrast ratios with pass badges.
- [HSL converter](https://hopi.co.uk/hsl-converter/): Hex to HSL, or HSL sliders to hex.
- [Hex to RGB converter](https://hopi.co.uk/hex-to-rgb/): Hex codes to RGB and HSL, with preview.
- [Image colour picker](https://hopi.co.uk/image-colour-picker/): Click any pixel in a photo to get its colour.
- [RGB to hex converter](https://hopi.co.uk/rgb-to-hex/): RGB values to a hex code, with preview.
- [Random colour generator](https://hopi.co.uk/random-colour-generator/): Truly random colours with hex and RGB.
- [Shades & tints generator](https://hopi.co.uk/colour-shades-generator/): Five tints and five shades from any colour.

## Date & time
- [Add working days](https://hopi.co.uk/add-working-days/): Find the date N working days away.
- [Age calculator](https://hopi.co.uk/age-calculator/): Exact age, and days to the next birthday.
- [Cat age calculator](https://hopi.co.uk/cat-age-calculator/): Cat years to human years, the 15/24/+4 chart.
- [Countdown to a date](https://hopi.co.uk/countdown-timer/): Live countdown to any date and time.
- [Date calculator](https://hopi.co.uk/date-calculator/): Add or subtract time from any date.
- [Day of the week finder](https://hopi.co.uk/day-of-week-calculator/): Find the weekday for any date.
- [Days between dates calculator](https://hopi.co.uk/days-between-dates/): Count the days between any two dates.
- [Days until Christmas](https://hopi.co.uk/days-until-christmas/): Live sleeps countdown to 25 December.
- [Dog age calculator](https://hopi.co.uk/dog-age-calculator/): Dog years to human years, by size.
- [Hours calculator](https://hopi.co.uk/hours-calculator/): Hours between two times, minus breaks.
- [Leap year checker](https://hopi.co.uk/leap-year-checker/): Yes or no, with the 4/100/400 rule shown.
- [Minutes to hours converter](https://hopi.co.uk/minutes-to-hours/): Minutes to h:mm and decimal hours.
- [Moon phase calculator](https://hopi.co.uk/moon-phase-calculator/): Moon phase and illumination for any date.
- [Pomodoro timer](https://hopi.co.uk/pomodoro-timer/): 25/5/15 focus timer with session dots.
- [Star sign calculator](https://hopi.co.uk/star-sign-calculator/): Find the zodiac sign for any birthday.
- [Stopwatch](https://hopi.co.uk/stopwatch/): Laps with split and total, to the hundredth.
- [Time calculator](https://hopi.co.uk/time-calculator/): Add or subtract hours and minutes.
- [Time zone converter](https://hopi.co.uk/time-zone-converter/): Convert times between world zones.
- [What week number is it?](https://hopi.co.uk/week-number/): Find the ISO week number for any date.
- [Working days calculator](https://hopi.co.uk/working-days-calculator/): Count working days between two dates.

## Random & generators
- [Barcode generator](https://hopi.co.uk/barcode-generator/): Make EAN, UPC and Code 128 barcodes.
- [Bingo card generator](https://hopi.co.uk/bingo-card-generator/): Generate and print UK 90-ball bingo cards.
- [Bulk QR code generator](https://hopi.co.uk/bulk-qr-code-generator/): Up to 1,000 QR codes in one ZIP.
- [Coin flip](https://hopi.co.uk/coin-flip/): Heads or tails with a running tally.
- [Combination generator](https://hopi.co.uk/combination-generator/): Every way of choosing r items from n.
- [Dice roller](https://hopi.co.uk/dice-roller/): Roll d4 to d20, totals included.
- [EuroMillions number generator](https://hopi.co.uk/euromillions-generator/): Random EuroMillions lines, drawn fairly.
- [Fortune cookie](https://hopi.co.uk/fortune-cookie/): Crack a cookie for an original fortune.
- [Lottery number generator](https://hopi.co.uk/lottery-number-generator/): Random lines for UK lottery games.
- [Magic 8 ball](https://hopi.co.uk/magic-8-ball/): Shake the ball and get one of 20 answers.
- [Passphrase generator](https://hopi.co.uk/passphrase-generator/): Memorable random word passphrases.
- [Password generator](https://hopi.co.uk/password-generator/): Strong random passwords, made locally.
- [QR code generator](https://hopi.co.uk/qr-code-generator/): Turn any link or text into a QR code.
- [Random coordinates generator](https://hopi.co.uk/random-coordinates/): Fair random points across the globe.
- [Random letter generator](https://hopi.co.uk/random-letter-generator/): Random letters, vowels or consonants.
- [Random number generator](https://hopi.co.uk/random-number-generator/): Fair picks between any two numbers.
- [Random team generator](https://hopi.co.uk/random-team-generator/): Split any list of names into fair teams.
- [Random word generator](https://hopi.co.uk/random-word-generator/): Random words for games and prompts.
- [Reaction time test](https://hopi.co.uk/reaction-time-test/): Time your reflexes in milliseconds.
- [Scratch card](https://hopi.co.uk/scratch-card/): Scratch the foil to reveal a random outcome.
- [Secret Santa generator](https://hopi.co.uk/secret-santa-generator/): Draw names so nobody gets themselves.
- [Slot machine name picker](https://hopi.co.uk/slot-machine-picker/): Spin a reel of names to pick a winner.
- [Spin the bottle](https://hopi.co.uk/spin-the-bottle/): Spin a bottle to pick a player at random.
- [Typing speed test](https://hopi.co.uk/typing-speed-test/): Measure your words per minute.
- [Username generator](https://hopi.co.uk/username-generator/): Fresh username ideas, click to copy.
- [Wheel spinner](https://hopi.co.uk/wheel-spinner/): Spin a wheel of names to pick a winner.
- [Yes or no](https://hopi.co.uk/yes-no-wheel/): Let chance decide, yes or no.

## Converters & units
- [Angle converter](https://hopi.co.uk/angle-converter/): Degrees, radians, gradians and turns.
- [Area converter](https://hopi.co.uk/area-converter/): sq m, sq ft, acres, hectares, sq miles.
- [Aspect ratio calculator](https://hopi.co.uk/aspect-ratio-calculator/): Simplify or solve W:H, presets built in.
- [Cm to feet converter](https://hopi.co.uk/cm-to-feet/): Centimetres to feet and inches, both ways.
- [Cups to grams converter](https://hopi.co.uk/cups-to-grams/): US cups to grams for common ingredients.
- [Data size converter](https://hopi.co.uk/data-size-converter/): KB, MB, GB and TB, decimal or binary.
- [Download time calculator](https://hopi.co.uk/download-time-calculator/): Time a download from size and speed.
- [Kg to stone converter](https://hopi.co.uk/kg-to-stone/): Kilograms to stones and pounds, both ways.
- [Length converter](https://hopi.co.uk/length-converter/): mm, cm, m, km, inches, feet, yards, miles.
- [Litres to pints converter](https://hopi.co.uk/litres-to-pints/): Litres to UK pints, both ways.
- [MPG converter](https://hopi.co.uk/mpg-converter/): UK mpg to litres per 100 km, both ways.
- [Miles to km converter](https://hopi.co.uk/miles-to-km/): Miles and kilometres, both ways, live.
- [Military time converter](https://hopi.co.uk/military-time-converter/): 24-hour to 12-hour am/pm and back.
- [Number to words converter](https://hopi.co.uk/number-to-words/): Figures written out in British English words.
- [Oven temperature converter](https://hopi.co.uk/oven-temperature-converter/): Celsius, fan, Fahrenheit and gas mark.
- [Power converter](https://hopi.co.uk/power-converter/): Watts, kW, horsepower and PS, both ways.
- [Pressure converter](https://hopi.co.uk/pressure-converter/): Bar, psi, kPa and atm for tyres and more.
- [Ring size converter](https://hopi.co.uk/ring-size-converter/): UK letters to US numbers and mm, both ways.
- [Shoe size converter](https://hopi.co.uk/shoe-size-converter/): UK shoe sizes to EU and US, men and women.
- [Speed converter](https://hopi.co.uk/speed-converter/): mph, km/h, m/s, knots and Mach.
- [Temperature converter](https://hopi.co.uk/celsius-to-fahrenheit/): Celsius and Fahrenheit, both ways, live.
- [Volume converter](https://hopi.co.uk/volume-converter/): ml, litres, pints, gallons, UK and US.
- [Weight converter](https://hopi.co.uk/weight-converter/): Grams, kg, ounces, pounds and stones.

## Health & fitness
- [Alcohol unit calculator](https://hopi.co.uk/alcohol-unit-calculator/): UK units from ABV and volume.
- [BMI calculator](https://hopi.co.uk/bmi-calculator/): Body mass index with the NHS categories.
- [Body fat percentage calculator](https://hopi.co.uk/body-fat-calculator/): Body fat from the US Navy tape method.
- [Calories to kJ converter](https://hopi.co.uk/calories-to-kj/): kcal to kJ and back, exact factor 4.184.
- [Daily water intake calculator](https://hopi.co.uk/water-intake-calculator/): A rough daily fluid guide from your weight.
- [Heart rate zone calculator](https://hopi.co.uk/heart-rate-zones/): Max heart rate and five training zones.
- [Pregnancy due date calculator](https://hopi.co.uk/due-date-calculator/): Due date from your last period, plus weeks.
- [Running pace calculator](https://hopi.co.uk/running-pace-calculator/): Pace, time or distance for any run.
- [Sleep cycle calculator](https://hopi.co.uk/sleep-calculator/): Bedtimes and wake times in 90-minute cycles.
- [TDEE & calorie calculator](https://hopi.co.uk/tdee-calculator/): Daily calories from the Mifflin-St Jeor formula.

## Dev & data
- [Base64 encode & decode](https://hopi.co.uk/base64/): Encode and decode Base64, UTF-8 safe.
- [CSS minifier](https://hopi.co.uk/css-minifier/): Strip CSS whitespace, see bytes saved.
- [CSV to JSON converter](https://hopi.co.uk/csv-to-json/): Turn CSV rows into a clean JSON array.
- [Cron expression translator](https://hopi.co.uk/cron-expression-parser/): Cron schedules explained in English.
- [Diff checker](https://hopi.co.uk/diff-checker/): Compare two texts, see added and removed lines.
- [Dummy data generator](https://hopi.co.uk/dummy-data-generator/): Fake but safe test records, CSV or JSON.
- [Email link generator](https://hopi.co.uk/email-link-generator/): Build correctly encoded mailto email links.
- [HTML escape & unescape](https://hopi.co.uk/html-escape/): Escape and unescape HTML entities.
- [HTML text & link extractor](https://hopi.co.uk/html-text-extractor/): Pull text, links and emails from HTML.
- [HTTP status code reference](https://hopi.co.uk/http-status-codes/): Search every standard HTTP status code.
- [Hash generator](https://hopi.co.uk/hash-generator/): SHA-256, SHA-1 and SHA-512 hex digests.
- [Inline CSS converter](https://hopi.co.uk/inline-css-converter/): Turn style blocks into inline styles for email.
- [JSON formatter](https://hopi.co.uk/json-formatter/): Pretty print, minify and validate JSON.
- [JSON to CSV converter](https://hopi.co.uk/json-to-csv/): Turn a JSON array into clean CSV.
- [JWT decoder](https://hopi.co.uk/jwt-decoder/): Decode JWT header, payload and expiry.
- [Markdown previewer](https://hopi.co.uk/markdown-previewer/): Preview markdown as you type.
- [Meta tag generator](https://hopi.co.uk/meta-tag-generator/): Build title, OG and Twitter meta tags.
- [Number base converter](https://hopi.co.uk/number-base-converter/): Binary, octal, decimal, hex and text.
- [Password strength checker](https://hopi.co.uk/password-strength-checker/): Test a password without sending it anywhere.
- [Regex tester](https://hopi.co.uk/regex-tester/): Test regex patterns with live matches.
- [Robots.txt generator](https://hopi.co.uk/robots-txt-generator/): Build and download a robots.txt file.
- [SEO meta tag analyser](https://hopi.co.uk/seo-analyzer/): Check a page's SEO meta tags.
- [SQL formatter](https://hopi.co.uk/sql-formatter/): Tidy SQL with clauses on their own lines.
- [Schema markup generator](https://hopi.co.uk/schema-markup-generator/): Build JSON-LD structured data blocks.
- [Slug generator](https://hopi.co.uk/slug-generator/): Titles into clean hyphenated URL slugs.
- [URL encode & decode](https://hopi.co.uk/url-encoder/): Percent-encode and decode URLs and text.
- [URL parser](https://hopi.co.uk/url-parser/): Split a URL into its decoded parts.
- [UTM link generator](https://hopi.co.uk/utm-link-generator/): Build tagged campaign URLs for GA4.
- [UUID generator](https://hopi.co.uk/uuid-generator/): Random v4 UUIDs, up to 100 at a time.
- [Unix timestamp converter](https://hopi.co.uk/unix-timestamp-converter/): Epoch timestamps to dates and back.
- [XML formatter](https://hopi.co.uk/xml-formatter/): Pretty print, minify and check XML.

## Crypto
- [Bitcoin address validator](https://hopi.co.uk/bitcoin-address-validator/): Check BTC addresses: legacy, SegWit, Taproot.
- [Crypto DCA calculator](https://hopi.co.uk/dca-calculator/): Average cost across all your buys.
- [Crypto profit calculator](https://hopi.co.uk/crypto-profit-calculator/): Profit, fees and breakeven for any coin.
- [ETH unit converter](https://hopi.co.uk/eth-unit-converter/): Wei, gwei and ETH without rounding errors.
- [Ethereum address checksum](https://hopi.co.uk/eth-address-checksum/): Validate and checksum ETH addresses.
- [Market cap calculator](https://hopi.co.uk/market-cap-calculator/): Price times supply, and the reverse.
- [Position size calculator](https://hopi.co.uk/position-size-calculator/): Units to buy for the risk you choose.
- [Satoshi to BTC converter](https://hopi.co.uk/satoshi-converter/): Sats, BTC, mBTC and bits, both ways.
- [Staking rewards calculator](https://hopi.co.uk/staking-calculator/): Final balance and true APY from staking.

## Files & data
- [Add to calendar file generator](https://hopi.co.uk/ics-generator/): Make a .ics calendar file for any event.
- [CSV to Excel converter](https://hopi.co.uk/csv-to-excel/): CSV to .xlsx without mangled zeros or dates.
- [Dummy file generator](https://hopi.co.uk/dummy-file-generator/): Test files of an exact size, locally.
- [Dummy image generator](https://hopi.co.uk/dummy-image-generator/): Placeholder images at any size, locally.
- [EXIF remover](https://hopi.co.uk/exif-remover/): Strip GPS and metadata from photos.
- [Excel to CSV converter](https://hopi.co.uk/excel-to-csv/): Turn Excel sheets into clean CSV files.
- [Excel to JSON converter](https://hopi.co.uk/excel-to-json/): Turn Excel sheets into clean JSON.
- [Excel to XML converter](https://hopi.co.uk/excel-to-xml/): Turn Excel sheets into structured XML.
- [Favicon generator](https://hopi.co.uk/favicon-generator/): Make a real .ico favicon from any image.
- [File hash checker](https://hopi.co.uk/file-hash-checker/): Check a file's SHA-256 checksum locally.
- [HEIC to JPG converter](https://hopi.co.uk/heic-to-jpg/): iPhone HEIC photos to JPG, in your browser.
- [Image compressor](https://hopi.co.uk/image-compressor/): Shrink photo file sizes with a slider.
- [Image cropper](https://hopi.co.uk/image-cropper/): Crop images with a draggable box, locally.
- [Image resizer](https://hopi.co.uk/image-resizer/): Resize images to exact pixels, locally.
- [Image to Base64 converter](https://hopi.co.uk/image-to-base64/): Images to data URIs with copy-ready snippets.
- [JPG to PDF converter](https://hopi.co.uk/jpg-to-pdf/): Images become PDF pages, in your browser.
- [JPG to PNG converter](https://hopi.co.uk/jpg-to-png/): JPG to lossless PNG in one click.
- [JSON to Excel converter](https://hopi.co.uk/json-to-excel/): Turn a JSON array into a .xlsx file.
- [Merge PDF files](https://hopi.co.uk/merge-pdf/): Combine PDFs into one, in your browser.
- [PNG to JPG converter](https://hopi.co.uk/png-to-jpg/): PNG to JPG, white background, sizes compared.
- [Photo metadata (EXIF) viewer](https://hopi.co.uk/exif-viewer/): See a photo's camera, date and GPS data.
- [Rotate & flip image](https://hopi.co.uk/rotate-image/): Rotate or flip a photo in your browser.
- [SVG to PNG converter](https://hopi.co.uk/svg-to-png/): SVG files to sharp PNGs at 1x, 2x, 4x.
- [Signature generator](https://hopi.co.uk/signature-generator/): Draw and download a transparent signature.
- [Split PDF](https://hopi.co.uk/split-pdf/): Extract pages or split a PDF to a ZIP.
- [WebP to JPG converter](https://hopi.co.uk/webp-to-jpg/): WebP to JPG with a quality slider.
- [XML to Excel converter](https://hopi.co.uk/xml-to-excel/): Turn repeated XML records into .xlsx rows.

## News
- [Fiscal drag: how frozen tax thresholds quietly raise your bill](https://hopi.co.uk/news/fiscal-drag-frozen-thresholds-2026/) (2026-08-16): You got a pay rise and kept less of it than you expected. The thresholds that decide how much tax you pay have not moved since 2021, and that stealthy freeze is doing a lot of work.
- [A-level results: the percentage-point trap in the headlines](https://hopi.co.uk/news/a-level-results-percentage-point-trap/) (2026-08-16): Top grades edged up again this year, to 28.5 per cent of entries. Call that a rise of 0.2 per cent and you have made the classic results-day error. Here is what the numbers really say.
- [How many calories do you actually burn in a day?](https://hopi.co.uk/news/how-many-calories-do-you-burn-a-day/) (2026-08-15): The famous 2,000 a day figure is an average dressed up as a rule. Your real number depends on your size, your age and how much you move, and the maths behind it is refreshingly simple.
- [Why Britain still weighs itself in stones](https://hopi.co.uk/news/why-britain-still-weighs-in-stones/) (2026-08-12): The country buys petrol in litres and butter in grams, yet steps on the bathroom scales and reads off a number in stones and pounds. Here is how one stubborn unit survived metrication.