Random Joke fetches two-part jokes with separated setups and punchlines for applications and bots. Paid plans add a joke rating score to evaluate humor.

Random Pun retrieves a random pun and its topic category on every request. Each call supplies the full pun text, with paid plans adding an additional humor rating score.

Random Quote fetches a random quote and its author attribution on every call. Send a GET request without parameters to receive quote text ready for displays, dashboards, or daily messages.

Random User Generator produces realistic mock user profiles complete with full names, email addresses, usernames, birth dates, and phone numbers. Paid plans add batch generation, random passwords, and matching AI avatars.

Random Word is a random word generator API that selects a random English word from the dictionary on each request. Paid plans add dictionary definitions and ARPABET phonetic pronunciation.

Text Readability Score calculates the readability score and grade level of any text across standard formulas. It returns Flesch Reading Ease, Gunning Fog, Coleman-Liau, syllable and word counts, an average grade level, and a target audience label.

Reading Time Calculator estimates how long it will take to read a given text. It calculates reading time based on word count and customizable reading speed (WPM).

Recipe Generator creates complete cooking recipes from a dish title or meal idea. Pass any dish name to get structured ingredients with quantities, step-by-step instructions, prep time, cook time, and serving counts.

Regex Tester tests regular expressions against input strings across operations like match, search, replace, and split. It reports compilation validity, syntax error details, execution timing, and structural pattern analysis.

Relative Time Formatter converts Unix timestamps and ISO dates into readable relative time phrases. Choose between short, long, or abbreviated styles to get humanized past or future strings, millisecond differences, and unit breakdowns from seconds to years.

Remove Punctuation strips punctuation marks from any submitted text string and returns the cleaned text. Paid plans add the total count and a list of every punctuation character removed.

Reverse DNS Lookup resolves IPv4 and IPv6 addresses into their associated hostnames via PTR records. Pass any IP address to check if reverse records exist and receive all matching hostnames.

Reverse Geocode converts latitude and longitude coordinates into US and Canada location details. Pass geographic coordinates to retrieve the corresponding city, state, postal code, and country code.

Reverse Text transforms text by reversing characters, words, or lines with multiple reversal modes for different use cases.

Ring Size Converter translates international ring sizes or millimeter diameters into US and UK standards, inside diameter, and circumference. Paid plans add equivalent sizes for Europe, Japan, Switzerland, and Australia.

Rock Paper Scissors API simulates the classic hand game with detailed outcome analysis, statistics, and support for multiple rounds.

Roman Numeral Converter is a bidirectional tool for converting between Arabic numbers (1-3999) and Roman numerals. It provides detailed breakdowns of the conversion process.

Roman Numeral Math computes addition, subtraction, multiplication, and division between two Roman numerals. It returns the calculated result and complete equation in both Roman numeral and standard integer formats.

Routing Number Lookup is a bank routing number lookup API that verifies US ABA routing numbers to confirm bank names, states, and checksum validity. It identifies the routing type and Federal Reserve district, while paid plans add full street addresses, branch details, and replacement numbers.

RSS to JSON converts any RSS feed URL into structured JSON in real time. Each response returns the source domain, article counts, headlines, publication dates, summaries, and direct article links.