Turn any text or link into a crisp SVG QR code with your own size, colors, margin and error correction level, as an image or JSON.

Check any link's HTTP status, full redirect chain, final URL, server and response time, and batch up to 20 URLs in one POST request.

Pull every URL from a website's sitemaps, found via robots.txt, following sitemap indexes and .gz files, with lastmod, priority and changefreq.

Look up a domain's A, AAAA, MX, NS, TXT, CNAME, SOA, CAA and SRV records in one call, with an email summary showing MX presence and SPF record.

Expand bit.ly, t.co, TinyURL and any redirecting link to its final destination, with every hop of the redirect chain and the final HTTP status.

Check if a domain is registered and get its registrar, creation and expiry dates, age, status, nameservers and DNSSEC from RDAP data.

Detect 130+ technologies a website uses, from CMS and frameworks to analytics, pixels, chat, CDN and hosting, grouped by category.

Audit any page's on-page SEO in one call: a score and a plain list of issues covering title, meta description, H1, canonical, lang and more.

Get the title, description, image, favicon, site name, canonical URL, Twitter card and optional JSON-LD of any URL to build rich link previews.

Daily ECB reference exchange rates for 30+ currencies with any base currency, amount conversion and rates for any of the last 90 days.

Generate scannable Code 128 and EAN-13 barcodes as SVG with an automatic EAN check digit, custom bar height, bar width and an optional text line.

Check the HTTP security headers of any website, including HSTS, CSP and X-Frame-Options, and get a score, a grade and a list of fixes.

Extract every link on a web page with anchor text, rel value, nofollow flag and an internal or external label, in one GET request.

Turn the HTML tables on any web page into JSON rows, JSON objects keyed by header, or CSV, with the page's table count and captions.

Find who owns an IP address: network name, range, CIDR, organization, country and registration date from Regional Internet Registry RDAP.

Parse any User-Agent string into browser and version, operating system and version, device type, rendering engine and a bot flag.

Get the current time or any date in an IANA time zone with UTC offset, weekday and Unix time, and convert one moment into many zones at once.

Count words, sentences and reading time, score Flesch readability, build URL slugs, hash text with SHA and encode or decode Base64 in one API.

Generate cryptographically secure random passwords with an entropy score and UUID v4 identifiers, up to 100 per request, from two GET endpoints.

Convert GitHub-flavored Markdown with tables, lists and code blocks into safe HTML, with scripts and inline event handlers stripped by default.

Convert JSON arrays to CSV with nested objects flattened, and CSV to JSON with automatic delimiter detection, quoted fields and numbers.

Check whether a URL may be crawled under its site's robots.txt for any user agent, with the matching rule, sitemaps and crawl-delay.

Validate an IBAN's checksum, length and country format, and split it into bank code, branch code and account number with a SEPA flag.

Convert XML to JSON with attributes kept, JSON to XML, YAML to JSON and JSON to YAML. POST the document and get the converted result back.

Detect the language of any text and get the ISO 639-3 code, English name, confidence, a reliability flag and the top 5 candidate languages.

Every country with ISO code, localized and native name, capital, continent, calling code, currencies, languages and flag, with filters and search.

Get public and bank holidays for 100+ countries and their states or regions for any year, with localized names and an is-this-a-holiday check.

Convert between 300+ units of length, weight, volume, temperature, speed, data and more, and safely evaluate math expressions in one API.

Count working days between two dates or add and subtract business days, skipping weekends and public holidays for 100+ countries and regions.

Generate lightweight SVG placeholder images at any width and height with your own background color, text color and label, for mockups and prototypes.

Find every icon a website declares: favicon.ico, PNG and SVG icons, Apple touch and manifest icons, with sizes, types and a best pick.

Convert a color between HEX, RGB, HSL and CMYK, get palettes, shades and tints, the best text color and the WCAG contrast ratio with a second color.

Check whether a DNS change has propagated by querying six public resolvers at once and getting their answers, agreement, consensus and response times.

Turn JSON with line items, quantities, prices and tax into a PDF invoice, or make a simple PDF from text. Get the PDF file or a Base64 string.

Look up 9,500 airports by IATA or ICAO code, search by name or city, find the nearest airports and measure the distance between two of them.

Get sunrise, sunset, twilight, golden hour and day length for any coordinates and date, plus moon phase, illumination and moonrise times.

Get the IANA time zone for any latitude and longitude, with local time, UTC offset, abbreviation and whether daylight saving time is active.

Search 7,793 USDA foods and get calories, macros, vitamins and minerals per 100 g or any amount, plus common portion sizes and recipe totals.

Detect and censor profanity in user text across 25+ languages, with leetspeak detection, custom blocked words and an allow-list for false positives.

Score English or Spanish text with Flesch, Flesch-Kincaid, Gunning Fog, SMOG and more, plus word counts, grade level and reading time.

Generate lorem ipsum paragraphs, sentences, words, list items or titles as JSON, plain text or HTML, with seeded output for repeatable tests.

Look up 147,000 English words: definitions, examples, synonyms, antonyms, IPA and ARPAbet pronunciation, syllables, rhymes and autocomplete.

City level geocoding for 171,000 places: coordinates to nearest town, region, country and time zone, plus place search and nearby places.

Generate realistic fake users, addresses, companies, products, posts and transactions in 6 languages, or rows from your own JSON schema.

Decode a 17-character VIN into make, model, year, trim, body, engine, fuel, transmission and plant, with check digit validation and country.

Hash text with MD5, SHA-1, SHA-256, SHA-384, SHA-512 and CRC32 in one call, sign messages with HMAC and identify which algorithm made a hash.

Calculate BMI, BMR, daily calories (TDEE) with lose, maintain and gain targets, macros, ideal weight and Navy body fat, in metric or imperial.

Look up place, region and coordinates for 1.8 million postal codes in 121 countries, measure the distance between two codes and validate codes.

Get the exact Western zodiac sign from the Sun's position at birth and the Chinese zodiac from the lunisolar calendar, with element and dates.

Convert dates between 13 calendars such as Hijri, Hebrew, Persian and Chinese, and get Islamic, Jewish, Chinese and Persian holidays, 1900 to 2100.

Search 1,949 Emoji 17 emojis by keyword and get names, keywords, category, shortcodes, codepoints and HTML entities in 6 languages.

Check English text (US or UK) for misspellings and get ranked suggestions, offsets and auto-corrected text. Bing Spell Check compatible.

Score English text as positive, negative or neutral with a -1 to +1 score, class proportions and per-sentence results, using VADER rules.

Extract the key phrases and most frequent words from any text in 50+ languages with RAKE, language detection, scores and counts.

Convert numbers and money amounts to words in English, Spanish, French, German, Portuguese and Italian for cheques, invoices and contracts.

Calculate loan and mortgage payments, total interest and amortization schedules with down payments, extra payments and five payment frequencies.

Get a company's icon, full logo, brand color and name from its domain as JSON or as the image itself, with an initials fallback. Clearbit replacement.

Generate SVG initials avatars from any name with deterministic colors, circle, rounded or square shapes, custom sizes and a JSON data URI option.

Look up synonyms, antonyms and broader terms for 147,000 English words and phrases, grouped by meaning with part of speech and definitions.

Find perfect rhymes and pronunciation (ARPAbet and IPA) for English words, and count syllables per word and per line with haiku detection.

Check if domain names are available across many extensions in one call via registry RDAP with DNS fallback, plus registrar, creation and expiry dates.

Distance between cities, airport codes or coordinates in km, miles and nautical miles, with bearing, midpoint, flight time and distance matrices.

Summarize any text or article URL by picking its most important sentences with TextRank, plus keywords and reading time saved, in 50+ languages.