API Marketplace

Measure typing speed and accuracy. Compute words-per-minute, characters-per-minute and accuracy from a character (or word) count and the elapsed time, optionally subtracting uncorrected errors for a net WPM; compare what was typed against a reference text to count per-character mistakes and score the attempt; and estimate how long a given amount of text will take at a target speed. Uses the standard typing convention that one word equals five characters. Perfect for typing tests and games, coding-speed tools, onboarding and skills assessments, and leaderboards. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. A focused typing calculator, distinct from general unit or percentage maths.

Tempo di attività

100.0%

Latenza

82ms

Abbonati

3,557

An integer toolkit as an API. Factorize any number into its prime factors with exponents (and a readable 2^3 × 3^2 × 5 form), with the divisor count, the divisor sum, the full list of divisors and whether the number is perfect; find the greatest common divisor and least common multiple of two numbers (and whether they are coprime); and test primality, returning the next and previous prime. Handles numbers up to a trillion. Perfect for maths education and puzzles, cryptography demos, generating test data and any time you need the building blocks of a number. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. A focused integer toolkit, distinct from a general math-expression engine.

Tempo di attività

100.0%

Latenza

79ms

Abbonati

4,587

Work with anagrams. The check endpoint tells you whether two strings are anagrams of each other — by default ignoring case, spaces and punctuation, so "Dormitory" and "Dirty Room" match. The signature endpoint returns the canonical sorted-letter key for a string; two strings are anagrams exactly when their signatures are equal, which makes the signature ideal for indexing and bucketing. The group endpoint takes a list of words and groups them into their anagram sets. Perfect for word games and puzzles, dictionaries and search, and de-duplicating reordered strings. No word list needed — it is pure letter analysis. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. Distinct from spelling, similarity and dictionary APIs.

Tempo di attività

100.0%

Latenza

78ms

Abbonati

4,887

Scorre le parole in base alle tessere delle lettere per Scrabble e Words With Friends. L'endpoint di punteggio somma il valore nominale di ogni tessera in una parola — con la suddivisione per lettera — e l'endpoint dei valori restituisce il valore in punti di ogni lettera per il set di regole scelto. Le tessere vuote (? _ *) contano come zero. Sono integrate sia la distribuzione standard inglese di Scrabble che quella di Words With Friends. Perfetto per app e bot di giochi di parole, strumenti per puzzle e quiz, insegnamento e classifiche. Nota: questo è il valore grezzo della tessera — non vengono applicati i raddoppi/tripli di lettera e parola e il bonus bingo di 50 punti. Puro calcolo locale — nessuna chiave, nessun servizio di terze parti, istantaneo. Live, nulla viene memorizzato. 3 endpoint. Distinto dalle API di dizionario, ortografia e statistiche testuali.

Tempo di attività

100.0%

Latenza

83ms

Abbonati

4,320

Reflow plain text to a fixed column width on word boundaries — the classic word-wrap you need for terminal and CLI output, email and plain-text formatting, code comments, README and changelog blocks, and fixed-width reports. The wrap endpoint breaks text to a chosen width while preserving paragraphs (blank-line separated), with optional left indentation and the option to hard-break words longer than the line; the unwrap endpoint does the reverse, collapsing a wrapped block back into single-line paragraphs. Pure local computation — no key, no third-party service, instant; up to 200,000 characters via POST. Live, nothing stored. 3 endpoints. Distinct from case conversion, slugs and text statistics.

Tempo di attività

100.0%

Latenza

85ms

Abbonati

3,550

Everyday percentage maths as an API. Four clear operations: what is X% of a value (15% of 200 = 30); what percentage one number is of another (30 is 15% of 200); the percentage change between two numbers, with the direction and the raw difference (200 → 250 is a 25% increase); and applying a percentage increase or decrease to a value (200 + 15% = 230). Handy for discounts, tips and tax, growth and KPI deltas, progress bars, dashboards and quick spreadsheet-style sums — without writing a formula. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 5 endpoints. A focused calculator, distinct from a general math-expression engine.

Tempo di attività

100.0%

Latenza

69ms

Abbonati

3,723

Escape a string so it is safe to drop into a specific context. Pick a target — a regular expression (so the text matches literally), a shell command (POSIX single-quote wrapping), a JSON string, a CSV field (RFC 4180 quoting) or a SQL string literal — and get back the correctly escaped value, plus a short note on the rule applied. The contexts endpoint lists every target with a worked example. Perfect for code generation, building commands and queries, templating and data export, and safely interpolating user input. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. The SQL context is a quoted literal for convenience, not a replacement for parameterised queries. Distinct from base64/hex/URL/HTML-entity encoders.

Tempo di attività

100.0%

Latenza

94ms

Abbonati

4,600

Convert text to Unicode braille and back. Uses uncontracted (Grade 1) English braille: the 26 letters, digits with the number sign, capitals with the capital sign, and common punctuation, all output as Unicode Braille Patterns (U+2800–U+28FF) so they render anywhere. The to-braille endpoint turns ordinary text into braille; the from-braille endpoint decodes braille back to text. Unknown characters pass through unchanged. Perfect for accessibility tooling and education, labels and signage mockups, braille-display previews and learning resources. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. Grade 1 only (no contractions). Distinct from cipher/alphabet encoders and from general text transforms.

Tempo di attività

100.0%

Latenza

75ms

Abbonati

4,859

Aggiungi e verifica cifre di controllo con gli algoritmi standard — Luhn (mod 10), Verhoeff, Damm e ISO 7064 mod 97-10 — su qualsiasi numero. L'endpoint generate restituisce la/le cifra/e di controllo e il numero completo; l'endpoint validate ti dice se la cifra di controllo di un numero è corretta. Luhn è il familiare schema mod-10 alla base di carte di credito, IMEI e molti numeri ID; Verhoeff e Damm sono schemi a cifra singola che rilevano anche tutti gli errori di trasposizione adiacente; mod 97-10 produce due cifre di controllo ed è lo schema utilizzato da IBAN. Perfetto per generare e validare numeri di riferimento, conto, appartenenza e ordine, e per l'integrità dell'inserimento dati. Calcolo puramente locale — nessuna chiave, nessun servizio di terze parti, istantaneo. Live, nulla viene memorizzato. 4 endpoint. Distinto dai validatori di carte di credito e codici a barre, che applicano un algoritmo fisso a un formato numerico specifico.

Tempo di attività

100.0%

Latenza

77ms

Abbonati

3,905

Name any colour. The nearest endpoint takes a colour as a hex, an rgb() value, an r,g,b triple or another name and returns the closest of the 140+ CSS named colours — matched perceptually with CIE76 Lab distance, not naive RGB, so the name actually looks right — along with the distance and whether it is an exact match. The name endpoint resolves a CSS colour keyword (e.g. rebeccapurple, cornflowerblue) to its hex and RGB, and list returns the whole named-colour set. Perfect for design tools and pickers, accessibility and theming, turning brand hex codes into human labels, and naming colours in generated palettes. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. Distinct from colour conversion / palette / contrast tooling, which does not name colours.

Tempo di attività

100.0%

Latenza

92ms

Abbonati

3,457

Work with NDJSON / JSON Lines — the one-JSON-value-per-line format used by application and audit logs, streaming and LLM responses, jq, BigQuery, Elasticsearch bulk and many data pipelines. The to-array endpoint parses an NDJSON stream into a regular JSON array; to-ndjson does the reverse, turning a JSON array into NDJSON (one compact value per line); and validate checks every line independently, reporting which lines are valid and the exact parse error for any that are not. Blank lines are ignored. Perfect for log processing, ETL, data import/export and stream debugging. Pure local computation — no key, no third-party service, instant; up to 4 MB via POST. Live, nothing stored. 4 endpoints. Distinct from JSON validation/formatting and from CSV tooling.

Tempo di attività

100.0%

Latenza

78ms

Abbonati

4,737

Recipe and kitchen conversions as an API. Convert between volume units (teaspoon, tablespoon, cup, fl-oz, ml, litre, pint, quart, gallon) and between mass units (gram, kilogram, ounce, pound) — and, crucially, between volume and mass for a specific ingredient using its density, so 1 cup of all-purpose flour ≈ 125 g, 1 cup of granulated sugar ≈ 200 g and 1 cup of water ≈ 237 g. 30 common ingredients are built in (flours, sugars, butter, oils, honey, rice, oats, cocoa, cornstarch and more), each with its grams-per-cup. Perfect for recipe apps, scaling and "metric vs cups" conversion, shopping lists and meal-prep tools. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. Distinct from general physical unit conversion, which has no ingredient densities.

Tempo di attività

100.0%

Latenza

78ms

Abbonati

3,795

A running-pace calculator as an API. Work out pace and speed from a distance and a time (pace per kilometre and per mile, plus km/h, mph and m/s); compute the finish time from a distance and a target pace; predict your time at another distance using Peter Riegel's formula (T2 = T1 × (D2/D1)^1.06) — e.g. estimate a half-marathon from a 10K; and generate a split-time table for even pacing. Times accept seconds, M:SS or H:MM:SS. Perfect for running and fitness apps, race planning, training logs and pace bands. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 5 endpoints. Distinct from general unit conversion and from body-metric (BMI/BMR) health calculators.

Tempo di attività

100.0%

Latenza

84ms

Abbonati

3,157

Great-circle (as-the-crow-flies) navigation maths between latitude/longitude points. The distance endpoint returns the straight-line distance in metres, kilometres, miles and nautical miles, plus the initial and final compass bearing and the nearest 16-point compass direction. The destination endpoint computes where you end up from a start point, a bearing and a distance, and the midpoint endpoint finds the great-circle midpoint between two points. Perfect for proximity and radius search, geofencing, flight and shipping estimates, "distance from me" features and mapping. Pure local computation — no key, no third-party service, instant. These are straight-line distances on a spherical earth, not road routes. Live, nothing stored. 4 endpoints. Distinct from road routing, GeoJSON geometry measurement and coordinate-format conversion.

Tempo di attività

100.0%

Latenza

73ms

Abbonati

3,497

Convert and normalize plane angles. The convert endpoint moves a value between degrees, radians, gradians (gons), turns/revolutions, arcminutes, arcseconds, milliradians and DMS (degrees-minutes-seconds) — parse a DMS string like 12°34'56" or format a decimal angle as DMS. The normalize endpoint wraps any angle into the 0–360° or the −180–180° range. Perfect for graphics and game maths, CAD and surveying, robotics, astronomy and navigation headings. This covers plane angles specifically — a category general unit converters leave out. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. Distinct from general unit conversion and from geographic-coordinate conversion.

Tempo di attività

100.0%

Latenza

83ms

Abbonati

4,804

JSON Pointer (RFC 6901) を使用して JSON ドキュメント内の値にアクセスします — JSON Patch (RFC 6902)、JSON Schema、OpenAPI $ref で使用される /a/b/0 パス構文です。get エンドポイントはポインターの値を解決し（存在するかどうかを通知します）。set はポインターに値を書き込み、変更されたドキュメントを返します（最後の配列トークンとして - を使用して追加します）。list はドキュメント内のすべてのポインターを列挙し、オプションでリーフ値のみを対象とします。トークンのエスケープ（~0 は ~、~1 は /）は自動処理されます。深い JSON の外科的な読み取りやパッチ適用、設定やフォームツールの構築、API レスポンスのウォークに最適です。純粋なローカル計算 — キー不要、サードパーティサービス不要、即時。POST で最大 2 MB。ライブ、保存なし。4 つのエンドポイント。JSONPath クエリ、JSON diff/patch、ドット記法フラット化とは異なります。

Tempo di attività

100.0%

Latenza

82ms

Abbonati

4,265

Produz um hex dump canônico de qualquer entrada e analisa um hex dump de volta para bytes. O endpoint dump formata dados da mesma forma que hexdump -C e xxd — uma coluna de offset, os bytes em hex (agrupados em oitos) e uma coluna ASCII imprimível — com um número configurável de bytes por linha e opcionalmente maiúsculas. Alimente texto como UTF-8, ou binário como hex ou base64. O endpoint parse reverte qualquer hex dump — tolerando colunas de offset e colunas ASCII, ou uma sequência simples de hex — e retorna os bytes reconstruídos como hex, base64 e (quando imprimível) texto. Perfeito para inspecionar payloads binários, depurar protocolos e formatos de arquivo, comparar buffers e ensinar. Computação puramente local — sem chave, sem serviço de terceiros, instantâneo; até 1 MB via POST. Ao vivo, nada armazenado. 3 endpoints. Distinto de um codificador simples de base64/hex.

Tempo di attività

100.0%

Latenza

92ms

Abbonati

4,522

Codifica contenido en un data: URI y decodifica un data: URI de vuelta a su contenido (RFC 2397). Los data: URI incrustan un archivo directamente en HTML, CSS, JSON o correo electrónico, perfecto para imágenes pequeñas, SVG, fuentes e iconos que deseas incrustar sin una solicitud HTTP separada. El endpoint de codificación envuelve tu contenido (dado como texto UTF-8, base64 o hex para binario) con un tipo de medio y juego de caracteres elegidos, en codificación base64 o URL (porcentaje); el endpoint de decodificación analiza cualquier data: URI y devuelve su tipo de medio, juego de caracteres, si era base64, el tamaño en bytes y la carga útil como texto y/o base64. Cálculo puramente local — sin clave, sin servicio de terceros, instantáneo; hasta 4 MB vía POST. En vivo, nada almacenado. 3 endpoints. Distinto de un codificador base64/hex simple y de herramientas específicas para SVG.

Tempo di attività

100.0%

Latenza

84ms

Abbonati

4,604

Match file paths against glob patterns — the same wildcard language used by .gitignore, CI/CD path filters, build tools and the shell. Test whether a single path matches a pattern, or filter a whole list of paths down to the ones that match. Full minimatch support: * (within a segment) and ** (across segments), ? for one character, [abc] character classes, {a,b,c} brace expansion and extended globs, with options for case-insensitivity, matching dotfiles and basename-only matching. Perfect for path-based rules, file selection, route guards, allow/deny lists and config validation. Pure local computation — no key, no third-party service, instant; send large lists via POST. Live, nothing stored. 3 endpoints. Distinct from regular-expression testing and from JSON path queries.

Tempo di attività

100.0%

Latenza

84ms

Abbonati

3,806

A Semantic Versioning (SemVer 2.0.0) toolkit as an API. Parse a version string into its major, minor, patch, prerelease and build parts; compare two versions; test whether a version satisfies an npm-style range (^1.2.3, ~1.4, >=2 <3, 1.x); increment a version to the next major, minor, patch or prerelease; and filter a list of versions by a range to find which match and the highest and lowest satisfying. Powered by the canonical node-semver. Perfect for dependency and release tooling, CI gates, update checkers, compatibility rules and package dashboards. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 6 endpoints. Distinct from package-registry lookups and vulnerability databases.

Tempo di attività

100.0%

Latenza

81ms

Abbonati

4,209

Generate and verify Apache/nginx htpasswd credentials. Hash a password with bcrypt (recommended), Apache's classic apr1 MD5, or sha1, and get back the ready-to-paste user:hash line for a .htpasswd file or an nginx auth_basic_user_file. The verify endpoint checks a password against any of those hash formats, auto-detecting the algorithm from the hash prefix ($2 for bcrypt, $apr1$ for apr1, {SHA} for sha1). Perfect for setting up HTTP Basic Auth, provisioning scripts, CI and container builds, and admin tooling. Pure local computation — credentials are hashed in memory and never stored; send them via POST. Live. 3 endpoints. Distinct from generic bcrypt password hashing — this targets the htpasswd file format and Apache-specific algorithms.

Tempo di attività

100.0%

Latenza

120ms

Abbonati

3,674

Normalize and fold Unicode text. Convert any string to one of the four Unicode normalization forms — NFC, NFD, NFKC, NFKD — so that visually identical text with different code-point compositions (é as one code point vs e + a combining accent) compares and stores consistently. Fold diacritics and special letters to plain ASCII (café → cafe, Straße → Strasse, Ångström → Angstrom, Łódź → Lodz) for slugs, search keys and filenames; the fi ligature and similar compatibility characters are expanded under NFKC/NFKD. And compare two strings for equality after normalization, optionally case-insensitively. Perfect for deduplication, search and indexing, username and identifier checks, and defending against look-alike (homoglyph) input. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 4 endpoints. Distinct from Unicode character-database lookups and from text segmentation.

Tempo di attività

100.0%

Latenza

82ms

Abbonati

4,882

Cada código de estado HTTP como una API. Busque cualquier código (p. ej., 404, 429, 503) y obtenga su frase de razón estándar, su clase (1xx Informativo, 2xx Éxito, 3xx Redirección, 4xx Error del Cliente, 5xx Error del Servidor), una descripción en inglés sencillo, la RFC que lo define, y banderas útiles para saber si es un error y si es comúnmente seguro reintentar (408, 425, 429, 500, 502, 503, 504). Liste cada código asignado o filtre por clase, y enumere las cinco clases de estado. Perfecto para clientes y pasarelas de API, páginas de error, paneles de registro y monitoreo, documentación y enseñanza. Cálculo puramente local — sin clave, sin servicio de terceros, instantáneo. En vivo, nada almacenado. 4 endpoints. Distinto de los verificadores de host/tiempo de actividad que reportan un estado en vivo — este es el diccionario de referencia de los códigos en sí.

Tempo di attività

100.0%

Latenza

78ms

Abbonati

4,187

Fast non-cryptographic checksums as an API. Compute CRC-32 — the integrity check used by ZIP, gzip, PNG and Ethernet — and Adler-32 — the checksum used by zlib — over UTF-8 text, hex or base64 input, returned in hex and as signed and unsigned 32-bit integers. Ideal for file- and message-integrity verification, cache keys and ETags, change detection and deduplication, where you want a quick fingerprint rather than a secure hash. Pure local computation — no key, no third-party service, instant; send binary via the hex or base64 encoding (up to 4 MB). Live, nothing stored. 4 endpoints. Explicitly NOT for security — for cryptographic digests (MD5, SHA-256, HMAC) use a hashing API instead.

Tempo di attività

100.0%

Latenza

78ms

Abbonati

3,343