uk.co.hopi/hopi · v1.1.0 · communication
uk.co.hopi/hopi is healthy: it completed an MCP handshake in 2644 ms and exposes 206 tools.
Free UK calculators, converters and validators (tax, VAT, stamp duty, dates, units), read-only.
Endpoint: https://mcp.hopi.co.uk/mcp (streamable-http)
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| Users (last 30 days) | 0 |
| Handshake | Healthy |
| Auth needed | None |
| Tool count | 206 |
| Latency | 2644 ms |
| Last checked (UTC) | 2026-10-16T20:40:57.438Z |
| Checked (UTC) | Status | Latency | Error |
|---|---|---|---|
| 2026-10-16T20:40:57.438Z | Healthy | 2644 | |
| 2026-10-15T13:55:23.730Z | Healthy | 3543 |
hopi_add_working_days | Add or subtract a number of working days (Monday to Friday) from a start date, optionally skipping England and Wales bank holidays. Dates use the YYYY-MM-DD format. Bank holiday data covers 2026 and 2027 only, so outside those years just weekends are skipped. Source: https://hopi.co.uk/add-working-d |
hopi_age_calculator | Work out an exact age from a date of birth, as of today or an optional 'as of' date. Dates use the YYYY-MM-DD format. Returns the age in years, months and days, the total days lived, and the next birthday. Source: https://hopi.co.uk/age-calculator/ |
hopi_alcohol_unit_calculator | Work out UK alcohol units in a drink from its ABV (percentage) and volume (millilitres), using units = ABV x ml / 1000. Optionally give the number of those drinks per week to get a weekly total compared against the NHS low risk guideline of 14 units a week. Source: https://hopi.co.uk/alcohol-unit-ca |
hopi_alphabetical_order | Sort the lines of a block of text into alphabetical order. Blank lines are dropped. Uses natural en-GB ordering so numbers within lines sort sensibly. Can sort ascending (A to Z) or descending (Z to A), and can ignore case. Source: https://hopi.co.uk/alphabetical-order/ |
hopi_angle_converter | Convert an angle from one unit to another. Units: deg (degrees), rad (radians), grad (gradians), turn (full turns). Source: https://hopi.co.uk/angle-converter/ |
hopi_area_converter | Convert an area from one unit to another. Units: sqm (square metres), sqft (square feet), sqyd (square yards), acre (acres), ha (hectares), sqkm (square kilometres), sqmi (square miles). Source: https://hopi.co.uk/area-converter/ |
hopi_aspect_ratio_calculator | Aspect ratio helper. In 'simplify' mode, give width and height to get the simplified W:H ratio, decimal ratio and nearest common ratio. In 'solve' mode, give a ratio (ratioW:ratioH) plus one of width or height to get the missing side. Source: https://hopi.co.uk/aspect-ratio-calculator/ |
hopi_average_calculator | Work out the mean, median, mode, sum, count, minimum and maximum of a list of numbers. Provide the numbers separated by spaces, commas, semicolons or new lines (type 1200 rather than 1,200, as commas are treated as separators). Source: https://hopi.co.uk/average-calculator/ |
hopi_base32_encoder | Encode text to RFC 4648 Base32 or decode Base32 back to text. Encoding maps the UTF-8 bytes of the text into 5-bit groups using the alphabet A to Z then 2 to 7, padded to a multiple of 8 characters with equals signs. Decoding tolerates lowercase input and missing padding, and reports characters outs |
hopi_base64 | Encode text to Base64, or decode a Base64 string back to text. UTF-8 safe, so accents and emoji survive the round trip. Returns the converted text or a clear error. Source: https://hopi.co.uk/base64/ |
hopi_bill_splitter | Split a restaurant bill between people. In 'itemised' mode, list each item with its amount and who shared it, then add an optional tip and service charge (both percentages applied to each person's own share). In 'even' mode, split one total evenly with an optional tip. Amounts in GBP. Source: https: |
hopi_bingo_card_generator | Generate one or more UK 90-ball bingo cards. Each card is a 3-row by 9-column grid holding 15 numbers, 5 per row, with each column drawing from its own decade (1 to 9, 10 to 19, and so on up to 80 to 90). Blank squares are null. Source: https://hopi.co.uk/bingo-card-generator/ |
hopi_bitcoin_address_validator | Check whether a Bitcoin address is valid by verifying its checksum and structure. Supports legacy Base58Check (P2PKH, P2SH) and Bech32/Bech32m SegWit and Taproot addresses, on mainnet and testnet. Does not query the blockchain or check balances. Source: https://hopi.co.uk/bitcoin-address-validator/ |
hopi_bmi_calculator | Work out body mass index (BMI) from height and weight, with the NHS weight category. Use units 'metric' with heightCm and weightKg, or 'imperial' with heightInches and weightPounds. BMI = weight in kg / (height in metres squared). Source: https://hopi.co.uk/bmi-calculator/ |
hopi_body_fat_calculator | Estimate body fat percentage using the US Navy tape method from a few measurements. For males give height, neck and waist; for females give height, neck, waist and hip. Use units 'metric' (centimetres) or 'imperial' (inches). Optionally give weight (kg for metric, pounds for imperial) to also get fa |
hopi_caesar_cipher | Encode or decode text with a Caesar shift cipher. Each letter is moved along the alphabet by the shift amount; a shift of 13 is ROT13. Only A to Z letters are changed, everything else is left as is. Decoding applies the opposite shift. Source: https://hopi.co.uk/caesar-cipher/ |
hopi_cagr_calculator | Work out the compound annual growth rate (CAGR) that takes a starting value to an ending value over a number of years. Returns the annual rate, the total growth and the growth multiple. Source: https://hopi.co.uk/cagr-calculator/ |
hopi_calories_to_kj | Convert food energy between kilocalories (kcal) and kilojoules (kJ) using the exact factor 1 kcal = 4.184 kJ. Give an amount and its unit ('kcal' or 'kj'); returns both values. Source: https://hopi.co.uk/calories-to-kj/ |
hopi_case_converter | Convert text to a different letter case. 'upper' is UPPERCASE, 'lower' is lowercase, 'title' capitalises the first letter of each word, and 'sentence' capitalises the first letter of each sentence. Source: https://hopi.co.uk/case-converter/ |
hopi_cat_age_calculator | Convert a cat's age in years to an approximate human age, using the standard 15, 24, then 4 a year chart. Returns the human-equivalent age and the cat's life stage. Source: https://hopi.co.uk/cat-age-calculator/ |
hopi_celsius_to_fahrenheit | Convert a temperature between Celsius and Fahrenheit. Also returns Kelvin. Set direction to 'c-to-f' or 'f-to-c'. Source: https://hopi.co.uk/celsius-to-fahrenheit/ |
hopi_character_counter | Count the characters in a block of text, including a count with spaces removed, the word count, how many SMS messages it would take to send, and the Twitter/X characters remaining out of 280. Source: https://hopi.co.uk/character-counter/ |
hopi_cipher_identifier | Identify what encoding or classical cipher a piece of text probably is (Base64, Base32, hex, binary, octal or decimal ASCII, URL encoding, HTML entities, Morse, Caesar or ROT-N, Atbash, reversed text) or recognise it as a UUID, IPv4 address, Unix timestamp, JWT or hash digest. Returns ranked candida |
hopi_cm_to_feet | Convert a height between centimetres and feet/inches. Direction 'cm-to-feet' takes cm and returns feet and inches. Direction 'feet-to-cm' takes feet and inches and returns cm. Source: https://hopi.co.uk/cm-to-feet/ |
hopi_cmyk_to_rgb | Convert print CMYK values (each 0 to 100) to on-screen RGB and hex, or convert RGB (each 0 to 255) the other way to CMYK. Uses the standard device-independent conversion. Source: https://hopi.co.uk/cmyk-to-rgb/ |
hopi_coin_flip | Flip a fair coin one or more times. Returns each result plus a tally of heads and tails. Source: https://hopi.co.uk/coin-flip/ |
hopi_colour_name_finder | Find the named CSS colour that exactly or most closely matches a hex code, using straight-line distance in RGB space across the 148 named CSS colours. Source: https://hopi.co.uk/colour-name-finder/ |
hopi_colour_palette_generator | Generate a five-swatch colour palette from a base hex colour using a chosen scheme: analogous, complementary, triadic or mixed. Supporting swatches carry a small random variation, so results vary slightly each call. Source: https://hopi.co.uk/colour-palette-generator/ |
hopi_colour_picker | Given a six-digit hex colour code (with or without a leading #), return its hex, RGB and HSL values. Source: https://hopi.co.uk/colour-picker/ |
hopi_colour_shades_generator | From a base hex colour, generate five progressively lighter tints (mixed towards white) and five progressively darker shades (mixed towards black), each in five equal steps of one sixth. Source: https://hopi.co.uk/colour-shades-generator/ |
hopi_combination_generator | List every way to choose r items from a list, ignoring order (combinations). Returns the total count and the combinations themselves (the first 5000). Source: https://hopi.co.uk/combination-generator/ |
hopi_compound_interest_calculator | Project savings growth from a starting deposit plus a regular monthly contribution, compounded monthly with contributions added at the end of each month. Returns the final balance, total paid in and interest earned. Amounts in GBP, rate is the annual rate as a percentage. Source: https://hopi.co.uk/ |
hopi_contrast_checker | Work out the WCAG contrast ratio between a foreground (text) colour and a background colour, both as hex codes, and report whether it passes AA and AAA for normal and large text. Source: https://hopi.co.uk/contrast-checker/ |
hopi_cron_expression_parser | Translate a standard five-field cron expression (minute, hour, day-of-month, month, day-of-week) into plain English. Understands stars, steps, ranges, lists and month and day names, plus shortcuts like @daily and @hourly. Source: https://hopi.co.uk/cron-expression-parser/ |
hopi_crypto_profit_calculator | Work out profit or loss on a crypto trade from buy price, quantity and an optional per-side fee percentage. Returns breakeven price always, and profit, return percentage and total fees once a sell price is given. All figures are treated as GBP. Source: https://hopi.co.uk/crypto-profit-calculator/ |
hopi_css_gradient_generator | Build a ready-to-use CSS gradient from two colours. Choose a linear gradient with an angle in degrees, or a radial gradient. Returns the gradient value and a full background declaration. Source: https://hopi.co.uk/css-gradient-generator/ |
hopi_css_minifier | Minify CSS by removing comments and needless whitespace, while preserving quoted strings and the spaces inside calc() expressions. Returns the minified CSS with before and after byte sizes. Source: https://hopi.co.uk/css-minifier/ |
hopi_csv_to_json | Convert CSV text into a JSON array, following standard CSV quoting rules for embedded commas, quotes and line breaks. With headers on, the first row becomes object keys; with headers off, each row is an array of strings. Source: https://hopi.co.uk/csv-to-json/ |
hopi_cups_to_grams | Convert US cups of a common baking ingredient to grams (approximate). Ingredients: flour (plain flour), caster (caster sugar), brown (packed brown sugar), butter, cocoa (cocoa powder), oats, rice (uncooked rice), icing (icing sugar). Source: https://hopi.co.uk/cups-to-grams/ |
hopi_currency_converter | Convert an amount of money from one currency to another using Hopi's live mid-market exchange rates (updated hourly, 150+ currencies). Use ISO 4217 codes such as GBP, EUR, USD, JPY. Source: https://hopi.co.uk/currency-converter/ |
hopi_data_size_converter | Convert a digital storage size between units. Units: B (bytes), KB, MB, GB, TB. By default 1 KB = 1000 bytes (decimal, as storage is sold). Set binary to true for 1 KB = 1024 bytes (as Windows reports drive sizes). Source: https://hopi.co.uk/data-size-converter/ |
hopi_date_calculator | Add or subtract a number of days, weeks, months or years from a date. Dates use the YYYY-MM-DD format. Months and years are clamped to the last day of the target month where needed. Returns the resulting date. Source: https://hopi.co.uk/date-calculator/ |
hopi_day_of_week_calculator | Find which day of the week a given date falls on. Dates use the YYYY-MM-DD format. Also reports which weekday that same day and month falls on in the current year. Source: https://hopi.co.uk/day-of-week-calculator/ |
hopi_day_rate_calculator | Convert between a contractor day rate and an annual salary equivalent using a chosen number of billable working days per year (default 220). Mode 'to_salary' turns a day rate into yearly, monthly and weekly figures; mode 'to_rate' turns a salary into a day rate. Gross amounts in GBP, before tax. Sou |
hopi_days_between_dates | Count the number of days between two dates, with the total also shown in weeks and in weekdays (Monday to Friday). Dates use the YYYY-MM-DD format. Set inclusive to true to count both end days. Source: https://hopi.co.uk/days-between-dates/ |
hopi_days_until_christmas | Count the number of sleeps until the next Christmas Day (25 December). Uses today's date by default, or an optional 'from' date in YYYY-MM-DD format. Source: https://hopi.co.uk/days-until-christmas/ |
hopi_dca_calculator | Work out the average cost basis across a series of pound-cost-averaged buys. Each buy is an amount of money spent and the price paid per unit. Returns total invested, coins acquired and average cost, plus current value and unrealised profit or loss if a current price is given. Figures are treated as |
hopi_dice_roller | Roll one or more dice with a given number of sides. Returns each die result plus the total, highest and lowest. Source: https://hopi.co.uk/dice-roller/ |
hopi_diff_checker | Compare two texts line by line using a longest common subsequence diff, and report which lines were added and which were removed. An edited line shows as one removed line plus one added line. Comparison is exact, including spaces and case. Source: https://hopi.co.uk/diff-checker/ |
hopi_discount_calculator | Work out a discount and sale price. Mode 'pct': a percentage off a price. Mode 'fixed': a fixed pound amount off a price. Mode 'find': the discount percentage from an original price and a final price. All money figures are in pounds. Source: https://hopi.co.uk/discount-calculator/ |
hopi_dog_age_calculator | Convert a dog's age in years to an approximate human age, using the standard veterinary chart. The later rate depends on the dog's size: small, medium or large. Returns the human-equivalent age. Source: https://hopi.co.uk/dog-age-calculator/ |
hopi_download_time_calculator | Estimate how long a download takes. Give a file size with its unit (MB, GB, TB) and a connection speed with its unit (Mbps or Gbps in bits per second, or MBps in bytes per second). Returns a human-readable duration and the time in seconds. Source: https://hopi.co.uk/download-time-calculator/ |
hopi_due_date_calculator | Estimate a pregnancy due date from the first day of the last menstrual period (LMP) and cycle length. Method: adjust the LMP by (cycle - 28) days, then add 280 days for the due date. Also returns the dates the second and third trimesters begin (LMP-adjusted + 84 and + 182 days). Dates are ISO 'YYYY- |
hopi_dummy_data_generator | Generate fake but safe UK test records. Phone numbers come from Ofcom's reserved drama ranges and emails use RFC 2606 example domains, so no record can reach a real person. Returns an array of records, plus CSV text. Source: https://hopi.co.uk/dummy-data-generator/ |
hopi_email_header_analyser | Analyse raw email headers (the full source from Show original or View message source) without any network call: lists every Received hop in delivery order with host, IP, time and delay between hops; extracts From, Reply-To, Return-Path, Subject, Date, Message-ID and mailer; reads SPF, DKIM and DMARC |
hopi_email_link_generator | Build a correctly percent-encoded mailto link from to, cc, bcc, subject and body fields, plus a ready to paste HTML anchor snippet. Spaces are encoded as %20 and line breaks as %0D%0A, as the mailto standard expects. Source: https://hopi.co.uk/email-link-generator/ |
hopi_emoji_remover | Remove emoji from a block of text, leaving the words and normal punctuation intact. Joined emoji sequences (such as a family or a flag) count as a single emoji. The copyright, registered and trademark symbols are kept. Returns the cleaned text and how many emoji were removed. Source: https://hopi.co |
hopi_energy_cost_calculator | Work out the running cost of an electrical appliance from its power in watts, hours used per day and your electricity unit price in pence per kWh. Returns daily, weekly, monthly and yearly cost plus kWh used. Costs in GBP. Source: https://hopi.co.uk/energy-cost-calculator/ |
hopi_env_to_json | Convert between a .env file and a JSON object. In env-to-json mode, each line is split on its first equals sign into a key and value, blank and commented lines are skipped, a leading export is removed, and matching surrounding quotes are stripped (double-quoted values also unescape \n); duplicate ke |
hopi_eth_address_checksum | Validate an Ethereum address's EIP-55 capitalisation checksum and return the correctly checksummed form. Reports whether the input is already checksummed, lacks a checksum (all one case), or fails the checksum. Uses keccak-256 exactly as EIP-55 specifies. Source: https://hopi.co.uk/eth-address-check |
hopi_eth_unit_converter | Convert an amount given in wei, gwei or ETH into all three units, using exact 18-decimal integer maths (no floating point error). 1 ETH is 1e18 wei; 1 gwei is 1e9 wei. Source: https://hopi.co.uk/eth-unit-converter/ |
hopi_euromillions_generator | Generate random EuroMillions lines. Each line has 5 main numbers from 1 to 50 and 2 Lucky Stars from 1 to 12. Source: https://hopi.co.uk/euromillions-generator/ |
hopi_event_wine_calculator | Work out how many bottles of red, white and Champagne to buy for an event, from the number of guests and glasses per guest. Ticking different wines splits a colour into one wine per glass, each poured once for every guest. Source: https://hopi.co.uk/event-wine-calculator/ |
hopi_fortune_cookie | Crack open a virtual fortune cookie and receive a random cheerful fortune. Returns the fortune. Source: https://hopi.co.uk/fortune-cookie/ |
hopi_fraction_calculator | Add, subtract, multiply or divide two fractions, giving the simplified result, a mixed number where relevant, and the decimal value. Each fraction is a numerator over a denominator, all whole numbers (numerators may be negative). Source: https://hopi.co.uk/fraction-calculator/ |
hopi_fraction_to_decimal | Convert between fractions and decimals. Mode 'toDecimal': give a numerator and denominator (whole numbers) to get the decimal and percentage. Mode 'toFraction': give a decimal to get the closest simplified fraction (denominator up to 10,000), noting whether it is exact. Source: https://hopi.co.uk/fr |
hopi_fuel_cost_calculator | Estimate the fuel cost of a journey from the distance in miles, the car's fuel economy in miles per gallon (UK gallon) and the pump price in pence per litre. Optionally double it for a return trip and split between passengers. Returns total cost, litres used and cost per person. Costs in GBP. Source |
hopi_hash_generator | Compute the SHA-256, SHA-1 or SHA-512 hash of a piece of text and return the hex digest. Uses WebCrypto on Hopi's server. SHA-1 is included for compatibility with older systems only and should not be used for anything new. Source: https://hopi.co.uk/hash-generator/ |
hopi_hash_identifier | Identify the most likely algorithms behind a hash string from its length, character set and any prefix. Covers MD5, NTLM, MD4, SHA-1, RIPEMD-160, SHA-224/256/384/512, the SHA3 family, CRC32, bcrypt, Argon2, sha512crypt, sha256crypt and md5crypt, plus Base64 length hints. A hash does not carry its al |
hopi_heart_rate_zones | Estimate maximum heart rate and five training zones (bpm) from age. Max HR = 220 - age. Method 'max' uses percentages of max HR (50-60, 60-70, 70-80, 80-90, 90-100%). Method 'karvonen' uses heart rate reserve and needs restingHeartRate: zone = (maxHR - resting) x intensity + resting. Source: https:/ |
hopi_hex_to_rgb | Convert a hex colour code (3, 6 or 8 digits, with or without a leading #) to its RGB and HSL values. Source: https://hopi.co.uk/hex-to-rgb/ |
hopi_hidden_character_checker | Scan text for hidden and suspicious Unicode characters and return a cleaned copy. Finds zero-width space, joiner and non-joiner (U+200B to U+200D), word joiner U+2060, byte order mark U+FEFF, soft hyphen U+00AD, no-break and narrow no-break spaces, hair and thin spaces, bidirectional controls (U+202 |
hopi_holiday_entitlement_calculator | Work out UK statutory paid holiday entitlement from the number of days worked per week, using 5.6 weeks a year capped at the statutory 28 days. Optionally scale to a part-year by the number of months worked. Returns entitlement in days and weeks. Source: https://hopi.co.uk/holiday-entitlement-calcul |
hopi_hourly_to_salary | Convert between an hourly pay rate and an annual salary based on hours worked per week (52 weeks a year). Mode 'to_salary' turns an hourly rate into annual, monthly and weekly pay; mode 'to_hourly' turns a salary into an hourly rate. Gross amounts in GBP, before tax. Source: https://hopi.co.uk/hourl |
hopi_hours_calculator | Work out the hours worked between a start time and an end time, minus an optional unpaid break. Times use 24-hour HH:MM format. Handles overnight shifts where the end time is earlier than the start. Returns the worked time as hours and minutes and as decimal hours. Source: https://hopi.co.uk/hours-c |
hopi_hsl_converter | Convert a hex colour code to hue, saturation and lightness (HSL), or convert HSL values to hex and RGB. Source: https://hopi.co.uk/hsl-converter/ |
hopi_html_escape | Escape the five special HTML characters (& < > " ') into entities so text is safe to place in HTML, or unescape named and numeric HTML entities back into plain characters. Source: https://hopi.co.uk/html-escape/ |
hopi_http_status_codes | Look up a standard HTTP status code by number and get its name, meaning and class (1xx to 5xx), or search all standard codes by a word in the number, name or description. Source: https://hopi.co.uk/http-status-codes/ |
hopi_iban_validator | Validate an IBAN or generate a test IBAN. Pass 'iban' to check it: the tool normalises it (uppercase, no spaces), confirms the length matches the country's published length, and runs the mod-97 checksum (move the first four characters to the end, map letters to numbers A=10 to Z=35, valid when the n |
hopi_ics_generator | Build a .ics (iCalendar, RFC 5545) calendar file for a single event and return the file text. Give a title, startDate and endDate as 'YYYY-MM-DD'. For timed events give startTime and endTime as 'HH:MM' (24-hour, read in the caller's local time zone and stored as UTC); set allDay true for an all-day |
hopi_inflation_calculator | Adjust a money amount for UK inflation. Mode 'cpi' uses the ONS monthly CPI index (2015 = 100) between two months from January 1988 to August 2026 and returns the adjusted value, total change and average annual rate. Mode 'custom' compounds a chosen annual rate over a number of years. Amounts in GBP |
hopi_json_formatter | Pretty print, minify or validate JSON. Formatting and minifying only change whitespace; key order, values and structure stay exactly as they were. Returns the output text or a clear parse error. Source: https://hopi.co.uk/json-formatter/ |
hopi_json_to_csv | Convert a JSON array of objects into CSV. The union of all keys becomes the header row in first-seen order, missing keys become empty cells, and nested objects or arrays are written back as compact JSON in the cell. Output follows RFC 4180 quoting. Source: https://hopi.co.uk/json-to-csv/ |
hopi_json_to_typescript | Convert a JSON sample into TypeScript interfaces and types. Objects become named interfaces (PascalCase from their key), nested objects get their own interfaces, arrays become element-type arrays with keys merged across all elements (keys missing from some elements are marked optional), and null val |
hopi_json_yaml_converter | Convert data between JSON and YAML in both directions. JSON to YAML parses with JSON.parse and serialises with js-yaml at two-space indent; YAML to JSON parses with js-yaml and prints with JSON.stringify. Runs on Hopi's server; nothing is stored. Source: https://hopi.co.uk/json-yaml-converter/ |
hopi_jwt_decoder | Decode a JSON Web Token's header and payload from base64url. The signature is never verified, so a decoded claim proves nothing on its own. Reports the algorithm, the exp, iat and nbf time claims, and whether the token is expired. A leading Bearer prefix and whitespace are handled. Source: https://h |
hopi_kg_to_lbs | Convert a weight in kilograms to pounds (avoirdupois lb), with the answer also split into whole pounds and ounces. Uses exactly 0.45359237 kg per pound and 16 ounces per pound. Source: https://hopi.co.uk/kg-to-lbs/ |
hopi_kg_to_stone | Convert a weight in kilograms to UK stone and pounds. Returns whole stone plus remaining pounds, and the totals in pounds and decimal stone. Source: https://hopi.co.uk/kg-to-stone/ |
hopi_lbs_to_kg | Convert a weight in pounds (avoirdupois lb) to kilograms and grams, with the UK stones-and-pounds form alongside. Uses exactly 0.45359237 kg per pound and 14 pounds per stone. Source: https://hopi.co.uk/lbs-to-kg/ |
hopi_leak_tracer | Watermark a document per recipient and trace a leaked copy. Mode 'mark' takes text and a list of recipient names (up to 255) and returns one copy per recipient carrying that recipient's number as an 18-character invisible marker (U+2060 frame, 8-bit number plus 8-bit check written in U+200B and U+20 |
hopi_leap_year_checker | Check whether a year is a leap year, applying the divisible-by-4, century, and divisible-by-400 rules. Returns the verdict, the divisibility tests, and the next and previous leap years. Source: https://hopi.co.uk/leap-year-checker/ |
hopi_length_converter | Convert a length from one unit to another. Units: mm, cm, m, km, in (inches), ft (feet), yd (yards), mi (miles). Source: https://hopi.co.uk/length-converter/ |
hopi_link_cleaner | Clean and inspect a URL without visiting it: strips tracking parameters (utm_*, fbclid, gclid, msclkid, mc_eid, _hsenc and many more, grouped by network), unwraps redirect wrappers whose destination is in the address itself (Outlook Safe Links, Proofpoint URL Defense v2 and v3, Google /url?q=, Faceb |
hopi_litres_to_pints | Convert between litres and pints. Direction 'litres-to-pints' takes litres and returns UK pints, US pints and millilitres. Direction 'pints-to-litres' takes UK pints and returns litres. Source: https://hopi.co.uk/litres-to-pints/ |
hopi_loan_calculator | Work out the monthly repayment on a loan from the amount borrowed, the annual interest rate and the term in years, using the standard amortising formula. Returns the monthly payment, total repaid and total interest. Amounts in GBP. Source: https://hopi.co.uk/loan-calculator/ |
hopi_lookalike_domain_generator | Generate the lookalike variants of a domain that could be used to impersonate it, grouped by technique, as a defensive typosquat check. Techniques: omission (missing character), repetition (doubled character), transposition (swapped adjacent), keyboard (QWERTY neighbour), vowel (vowel swap), homogly |
hopi_lorem_ipsum_generator | Generate lorem ipsum placeholder text. Choose whether the count is a number of paragraphs, sentences or words, and how many. Limits are 100 paragraphs, 500 sentences or 2000 words. Source: https://hopi.co.uk/lorem-ipsum-generator/ |
hopi_lottery_number_generator | Generate random lines for a UK lottery game: Lotto (6 numbers from 1 to 59), Thunderball (5 from 1 to 39 plus a Thunderball from 1 to 14) or Set For Life (5 from 1 to 47 plus a Life Ball from 1 to 10). Source: https://hopi.co.uk/lottery-number-generator/ |
hopi_magic_8_ball | Ask the Magic 8 Ball a yes or no question and receive one of its twenty classic answers at random. Returns the answer. Source: https://hopi.co.uk/magic-8-ball/ |
hopi_margin_calculator | Work out profit, gross margin and markup from a cost price and a selling price. Margin is profit as a percentage of the selling price; markup is profit as a percentage of the cost. Amounts in GBP. Source: https://hopi.co.uk/margin-calculator/ |