GadgetHumans API

Return ASCII codes with character, decimal, hex and binary, or look up one character. Pure CPU, instant.

Convert text to binary and binary back to text. Pure CPU, instant.

Compute body mass index from metric or imperial height and weight. Pure CPU, instant.

Count business days between two dates, or add N business days to a date. Pure CPU, instant. Use for SLAs and settlement dates.

Format a byte count as a human-readable string with the right unit. Pure CPU, instant.

Convert text between upper, lower, title, sentence, camel, snake and kebab case. Pure CPU, instant.

Look up a chemical element by symbol, name or atomic number and return its mass, category, group and period. Pure CPU, instant.

Flip one or more coins and return the sequence and heads count. Pure CPU, instant.

Check the WCAG contrast ratio between two colours and report AA and AAA pass or fail for normal and large text. Pure CPU, instant. Use before shipping a palette.

Return harmonised colour sets with hex and RGB values from a seed colour. Pure CPU, instant.

Find the closest CSS named colour to a hex value, with the distance score. Pure CPU, instant.

Turn a hex code into its nearest named colour. Pure CPU, instant.

Generate a harmonious palette (complementary, analogous, triadic) from a seed colour, with hex values. Pure CPU, instant.

Compute nCr and nPr for a set size and selection. Pure CPU, instant.

Project compound interest over time with optional monthly contributions, returning a year-by-year table. Pure CPU, instant.

Count syllables in a word or text. Pure CPU, instant.

Return ISO 3166 countries with alpha-2, alpha-3, numeric code and region, filterable by query. Pure CPU, instant.

Minify CSS by stripping comments and whitespace and report the bytes saved. Pure CPU, instant.

Return ISO 4217 currencies with code, name and minor units, filterable by query. Pure CPU, instant.

Remove duplicate lines, keeping the first occurrence, and report how many were removed. Pure CPU, instant.

Filter lines by substring or regular expression and return the matches. Pure CPU, instant.

Compare two quantities as a unit rate and report the percentage difference. Pure CPU, instant. Use to pick the cheaper of two packs with different sizes.

Sort lines numerically or naturally, ascending or descending. Pure CPU, instant.

Detect the language of a text with a confidence score. Pure CPU, instant.

Roll dice in standard notation such as 3d6+2 and return the individual rolls and total. Pure CPU, instant.

Apply a percentage discount to a price and return the sale price, amount saved and effective rate. Pure CPU, instant.

Search emoji by name or keyword and return the character, shortcode and category. Pure CPU, instant.

Count URLs, emails, hashtags, mentions and numbers in a text block. Pure CPU, instant.

Compute Shannon entropy of a string in bits per character and total bits, with an estimated brute-force space. Pure CPU, instant. Use to judge secret or key randomness.

Compute the factorial of a number with exact big-integer precision and its digit count. Pure CPU, instant.

Generate Fibonacci numbers as a sequence or return the nth term, with exact big-integer values. Pure CPU, instant.

Compute fuel needed and trip cost from distance, consumption and price. Pure CPU, instant.

Compute greatest common divisor and least common multiple for a list of integers. Pure CPU, instant.

Compute area, perimeter, volume and surface area for common shapes. Pure CPU, instant.

Generate relevant hashtags from a topic or text. Pure CPU, instant.

Parse an RSS or Atom feed into structured items (title, link, date, summary). Use to list the latest posts from a blog or news feed.

Distance and travel time between two places, with route information.

Pretty-print, validate or format a JSON payload and return parse errors with their position. Use to check a JSON string or make it readable.

Validate an EU VAT number against VIES (the European Commission database) and return the registered company name, address, country and standard VAT rate. Use to verify a VAT ID, check a supplier or customer before invoicing, apply reverse charge, or look up an EU company from its VAT number.

Generate fresh random UUID v4 identifiers, one or many in a single call. Cryptographically random, instant. Use for unique ids, request keys or fixtures.

Minify HTML by collapsing whitespace and removing comments, with the bytes saved. Pure CPU, instant.

Parse an HTML table into rows and columns as JSON or CSV. Pure CPU, instant.

Look up an HTTP status code's name, meaning and category. Pure CPU, instant.

Re-indent JSON with a chosen width, or collapse it to one line. Pure CPU, instant.

Convert INI or config-style key/value files into JSON, with each section as an object. Pure CPU, instant.

Project an investment's future value with contributions over a number of years. Pure CPU, instant.

Deep-merge two JSON objects into one, with the second overriding the first on shared keys. Pure CPU, instant.

Convert a JSON object or array into well-formed XML with configurable root and item names. Pure CPU, instant.

Return ISO 639 languages with code, English name and native name, filterable by query. Pure CPU, instant.

Extract every link from a page and report which resolve and which are broken. Live network check.