Awesome extendr

A curated list of R packages that use extendr. Many but not all of these are published on CRAN.

arcgis: ArcGIS Location Services Meta-Package

• Author: Josiah Parry
• URL: https://github.com/R-ArcGIS/arcgis/
• Description: Provides easy installation and loading of core ArcGIS location services packages 'arcgislayers', 'arcgisutils', 'arcgisgeocode', and 'arcgisplaces'. Enabling developers to interact with spatial data and services from 'ArcGIS Online', 'ArcGIS Enterprise', and 'ArcGIS Platform'. Learn more about the 'arcgis' meta-package at .
• Downloads: 10238

arcgisgeocode: A Robust Interface to ArcGIS 'Geocoding Services'

• Author: Josiah Parry
• URL: https://github.com/r-arcgis/arcgisgeocode
• Description: A very fast and robust interface to ArcGIS 'Geocoding Services'. Provides capabilities for reverse geocoding, finding address candidates, character-by-character search autosuggestion, and batch geocoding. The public 'ArcGIS World Geocoder' is accessible for free use via 'arcgisgeocode' for all services except batch geocoding. 'arcgisgeocode' also integrates with 'arcgisutils' to provide access to custom locators or private 'ArcGIS World Geocoder' hosted on 'ArcGIS Enterprise'. Learn more in the 'Geocode service' API reference .
• Downloads: 10762

arcgisplaces: Search for POIs using ArcGIS 'Places Service'

• Author: Josiah Parry
• URL: https://github.com/R-ArcGIS/arcgisplaces
• Description: The ArcGIS 'Places service' is a ready-to-use location service that can search for businesses and geographic locations around the world. It allows you to find, locate, and discover detailed information about each place. Query for places near a point, within a bounding box, filter based on categories, or provide search text. 'arcgisplaces' integrates with 'sf' for out of the box compatibility with other spatial libraries. Learn more in the 'Places service' API reference .
• Downloads: 139882

arcgisutils: R-ArcGIS Bridge Utility Functions

• Author: Josiah Parry
• URL: https://github.com/R-ArcGIS/arcgisutils
• Description: Developer oriented utility functions designed to be used as the building blocks of R packages that work with ArcGIS Location Services. It provides functionality for authorization, Esri JSON construction and parsing, as well as other utilities pertaining to geometry and Esri type conversions. To support 'ArcGIS Pro' users, authorization can be done via 'arcgisbinding'. Installation instructions for 'arcgisbinding' can be found at .
• Downloads: 24380

arcpbf: Process ArcGIS Protocol Buffer FeatureCollections

• Author: Josiah Parry
• URL: https://r.esri.com/arcpbf/
• Description: Fast processing of ArcGIS FeatureCollection protocol buffers in R. It is designed to work seamlessly with 'httr2' and integrates with 'sf'.
• Downloads: 18462

astgrepr: Parse and Manipulate R Code

• Author: Etienne Bacher
• URL: https://github.com/etiennebacher/astgrepr
• Description: Parsing R code is key to build tools such as linters and stylers. This package provides a binding to the 'Rust' crate 'ast-grep' so that one can parse and explore R code.
• Downloads: 2430

awdb: Query the USDA NWCC Air and Water Database REST API

• Author: Kenneth Blake Vernon
• URL: https://github.com/kbvernon/awdb
• Description: Query the four endpoints of the 'Air and Water Database (AWDB) REST API' maintained by the National Water and Climate Center (NWCC) at the United States Department of Agriculture (USDA). Endpoints include data, forecast, reference-data, and metadata. The package is extremely light weight, with 'Rust' via 'extendr' doing most of the heavy lifting to deserialize and flatten deeply nested 'JSON' responses. The AWDB can be found at .
• Downloads: 3744

b64: Fast and Vectorized Base 64 Engine

• Author: Josiah Parry
• URL: https://extendr.github.io/b64/
• Description: Provides a fast, lightweight, and vectorized base 64 engine to encode and decode character and raw vectors as well as files stored on disk. Common base 64 alphabets are supported out of the box including the standard, URL-safe, bcrypt, crypt, 'BinHex', and IMAP-modified UTF-7 alphabets. Custom engines can be created to support unique base 64 encoding and decoding needs.
• Downloads: 41793

caugi: Causal Graph Interface

• Author: Frederik Fabricius-Bjerre
• URL: https://frederikfabriciusbjerre.github.io/caugi/
• Description: Create, query, and modify causal graphs. 'caugi' (Causal Graph Interface) is a causality-first, high performance graph package that provides a simple interface to build, structure, and examine causal relationships.
• Downloads: 392

ciflyr: Reachability-Based Primitives for Graphical Causal Inference

• Author: Marcel Wienöbst
• URL: https://cifly.dev/
• Description: Provides a framework for specifying and running flexible linear-time reachability-based algorithms for graphical causal inference. Rule tables are used to encode and customize the reachability algorithm to typical causal and probabilistic reasoning tasks such as finding d-connected nodes or more advanced applications. For more information, see Wienöbst, Weichwald and Henckel (2025) .
• Downloads: 1174

datefixR: Standardize Dates in Different Formats or with Missing Data

• Author: Nathan Constantine-Cooke
• URL: https://docs.ropensci.org/datefixR/
• Description: There are many different formats dates are commonly represented with: the order of day, month, or year can differ, different separators ("-", "/", or whitespace) can be used, months can be numerical, names, or abbreviations and year given as two digits or four. 'datefixR' takes dates in all these different formats and converts them to R's built-in date class. If 'datefixR' cannot standardize a date, such as because it is too malformed, then the user is told which date cannot be standardized and the corresponding ID for the row. 'datefixR' also allows the imputation of missing days and months with user-controlled behavior.
• Downloads: 17226

enderecobr: Padronizador de Endereços Brasileiros (Brazilian Addresses Standardizer)

• Author: Daniel Herszenhut
• URL: https://github.com/ipeaGIT/enderecobr
• Description: Padroniza endereços brasileiros a partir de diferentes critérios. Os métodos de padronização incluem apenas manipulações básicas de strings, não oferecendo suporte a correspondências probabilísticas entre strings. (Standardizes brazilian addresses using different criteria. Standardization methods include only basic string manipulation, not supporting probabilistic matches between strings.)
• Downloads: 9165

fcl: A Financial Calculator

• Author: Xianying Tan
• URL: https://github.com/shrektan/fcl
• Description: A financial calculator that provides very fast implementations of common financial indicators using 'Rust' code. It includes functions for bond-related indicators, such as yield to maturity ('YTM'), modified duration, and Macaulay duration, as well as functions for calculating time-weighted and money-weighted rates of return (using 'Modified Dietz' method) for multiple portfolios, given their market values and profit and loss ('PnL') data. 'fcl' is designed to be efficient and accurate for financial analysis and computation. The methods used in this package are based on the following references: , .
• Downloads: 292065

fio: Friendly Input-Output Analysis

• Author: Alberson da Silva Miranda
• URL: https://albersonmiranda.github.io/fio/
• Description: Simplifies the process of importing and managing input-output matrices from 'Microsoft Excel' into R, and provides a suite of functions for analysis. It leverages the 'R6' class for clean, memory-efficient object-oriented programming. Furthermore, all linear algebra computations are implemented in 'Rust' to achieve highly optimized performance.
• Downloads: 141490

gadjid: Graph Adjustment Identification Distances for Causal Graphs

• Author: Sebastian Weichwald
• URL: https://github.com/CausalDisco/gadjid
• Description: Make efficient Rust implementations of graph adjustment identification distances available in R. These distances (based on ancestor, optimal, and parent adjustment) count how often the respective adjustment identification strategy leads to causal inferences that are incorrect relative to a ground-truth graph when applied to a candidate graph instead. See also Henckel, Würtzen, Weichwald (2024) .
• Downloads: 783

geodensity: Geodesic Kernel Density Estimation for Spatial Data

• Author: Andrew Brown
• URL:
• Description: Compute kernel density estimates on geographic data using geodesic distances. Combines the terra package's efficient raster processing with a parallelized Rust backend to deliver scalable, accurate density estimation for large geospatial datasets without.
• Downloads: NA

h3o: H3 Geospatial Indexing System

• Author: Josiah Parry
• URL: https://github.com/extendr/h3o
• Description: A dependency free interface to the H3 geospatial indexing system utilizing the Rust library 'h3o' via the 'extendr' library .
• Downloads: 2330

heck: Highly Performant String Case Converter

• Author: Josiah Parry
• URL: https://github.com/DyfanJones/heck
• Description: Provides a case conversion between common cases like CamelCase and snake_case. Using the 'rust crate heck' as the backend for a highly performant case conversion for 'R'.
• Downloads: 7380

orbweaver: Fast and Efficient Graph Data Structures

• Author: ixpantia, SRL
• URL: https://github.com/ixpantia/orbweaver-r
• Description: Seamlessly build and manipulate graph structures, leveraging its high-performance methods for filtering, joining, and mutating data. Ensures that mutations and changes to the graph are performed in place, streamlining your workflow for optimal productivity.
• Downloads: 6017

rbm25: A Light Wrapper Around the 'BM25' 'Rust' Crate for Okapi BM25 Text Search

• Author: David Zimmermann-Kollenda
• URL: https://davzim.github.io/rbm25/
• Description: BM25 is a ranking function used by search engines to rank matching documents according to their relevance to a user's search query. This package provides a light wrapper around the 'BM25' 'rust' crate for Okapi BM25 text search. For more information, see Robertson et al. (1994) .
• Downloads: 2232

RPesto: Phylogenetic Estimation of Shifts in the Tempo of Origination

• Author: Bjørn Tore Kopperud
• URL:
• Description: Implements diversification analyses using the phylogenetic birth-death-shift model. It leverages belief propagation techniques to calculate branch-specific diversification rates, see Kopperud & Hoehna (2025) .
• Downloads: 297

rshift: Paleoecology Functions for Regime Shift Analysis

• Author: Alex H. Room
• URL: https://github.com/alexhroom/rshift
• Description: Contains a variety of functions, based around regime shift analysis of paleoecological data. Citations: Rodionov() from Rodionov (2004) Lanzante() from Lanzante (1996) Hellinger_trans from Numerical Ecology, Legendre & Legendre (ISBN 9780444538680) rolling_autoc from Liu, Gao & Wang (2018) Sample data sets lake_data & lake_RSI processed from Bush, Silman & Urrego (2004) Sample data set January_PDO from NOAA: .
• Downloads: 144275

rtiktoken: A Byte-Pair-Encoding (BPE) Tokenizer for OpenAI's Large Language Models

• Author: David Zimmermann-Kollenda
• URL: https://davzim.github.io/rtiktoken/
• Description: A thin wrapper around the tiktoken-rs crate, allowing to encode text into Byte-Pair-Encoding (BPE) tokens and decode tokens back to text. This is useful to understand how Large Language Models (LLMs) perceive text.
• Downloads: 4322

socratadata: Explore Socrata Data with Ease

• Author: Ryan Zomorrodi
• URL: https://ryanzomorrodi.github.io/socratadata/
• Description: Provides an interface to search, read, query, and retrieve metadata for datasets hosted on 'Socrata' open data portals. Supports all 'Socrata' data types, including spatial data returned as 'sf' objects.
• Downloads: 1074

spopt: Spatial Optimization for Regionalization, Facility Location, and Market Analysis

• Author: Kyle Walker
• URL: https://github.com/walkerke/spopt-r
• Description: Spatial optimization algorithms for regionalization, facility location, and market analysis. Includes algorithms for spatial clustering (Max-P, AZP, SKATER, SPENC, Ward), optimal facility siting (P-Median, P-Center, MCLP, LSCP, CFLP, P-Dispersion, FRLM), and market share analysis (Huff model). Supports network-based travel times via custom cost matrices. Uses a Rust backend via 'extendr' for performance and the 'HiGHS' solver for mixed-integer programming.
• Downloads: NA

SQLFormatteR: Format SQL Queries

• Author: Morgan Durand
• URL: https://dataupsurge.github.io/SQLFormatteR/
• Description: A convenient interface for formatting 'SQL' queries directly within 'R'. It acts as a wrapper around the 'sql_format' Rust crate. The package allows you to format 'SQL' code with customizable options, including indentation, case formatting, and more, ensuring your 'SQL' queries are clean, readable, and consistent.
• Downloads: 2255

tergo: Style Your Code Fast

• Author: Konrad Pagacz
• URL: https://rtergo.pagacz.io
• Description: Provides a set of functions that allow users for styling their R code according to the 'tidyverse' style guide. The package uses a native Rust implementation to ensure the highest performance. Learn more about 'tergo' at .
• Downloads: 2516

tok: Fast Text Tokenization

• Author: Daniel Falbel
• URL: https://github.com/mlverse/tok
• Description: Interfaces with the 'Hugging Face' tokenizers library to provide implementations of today's most used tokenizers such as the 'Byte-Pair Encoding' algorithm . It's extremely fast for both training new vocabularies and tokenizing texts.
• Downloads: 92910

tomledit: Parse, Read, and Edit 'TOML'

• Author: Josiah Parry
• URL: https://extendr.github.io/tomledit/
• Description: A toolkit for working with 'TOML' files in R while preserving formatting, comments, and structure. 'tomledit' enables serialization of R objects such as lists, data.frames, numeric, logical, and date vectors.
• Downloads: 4954

unsum: Reconstruct Raw Data from Summary Statistics

• Author: Lukas Jung
• URL: https://github.com/lhdjung/unsum
• Description: Reconstructs all possible raw data that could have led to reported summary statistics. Provides a wrapper for the 'Rust' implementation of the 'CLOSURE' algorithm.
• Downloads: 1045

waysign: Multi-Purpose and High-Performance Routing

• Author: Thomas Lin Pedersen
• URL: https://github.com/thomasp85/waysign
• Description: Provides routing based on the 'path-tree' 'Rust' crate. The routing is general purpose in the sense that any type of R object can be associated with a path, not just a handler function.
• Downloads: 682

xactonomial: Inference for Functions of Multinomial Parameters

• Author: Michael C Sachs
• URL: https://sachsmc.github.io/xactonomial/
• Description: We consider the problem where we observe k vectors (possibly of different lengths), each representing an independent multinomial random vector. For a given function that takes in the concatenated vector of multinomial probabilities and outputs a real number, this is a Monte Carlo estimation procedure of an exact p-value and confidence interval. The resulting inference is valid even in small samples, when the parameter is on the boundary, and when the function is not differentiable at the parameter value, all situations where asymptotic methods and the bootstrap would fail. For more details see Sachs, Fay, and Gabriel (2025) .
• Downloads: 1377

yaml12: Fast 'YAML' 1.2 Parser and Formatter

• Author: Tomasz Kalinowski
• URL: https://posit-dev.github.io/r-yaml12/
• Description: A fast, correct, safe, and ergonomic 'YAML' 1.2 parser and generator written in 'Rust'. Convert between 'YAML' and simple 'R' objects with full support for multi-document streams, tags, anchors, and aliases. Offers opt-in handlers for custom tag behavior and round-trips common 'R' data structures. Implements the 'YAML' 1.2.2 specification from the 'YAML' Language Development Team (2021) . Proudly supported by Posit.
• Downloads: 348

ymd: Parse 'YMD' Format Number or String to Date

• Author: Xianying Tan
• URL: https://shrektan.github.io/ymd/
• Description: Convert 'YMD' format number or string to Date efficiently, using Rust's standard library. It also provides helper functions to handle Date, e.g., quick finding the beginning or end of the given period, adding months to Date, etc.
• Downloads: 8887

zoomerjoin: Superlatively Fast Fuzzy Joins

• Author: Beniamino Green
• URL: https://beniamino.org/zoomerjoin/
• Description: Empowers users to fuzzily-merge data frames with millions or tens of millions of rows in minutes with low memory usage. The package uses the locality sensitive hashing algorithms developed by Datar, Immorlica, Indyk and Mirrokni (2004) , and Broder (1998) to avoid having to compare every pair of records in each dataset, resulting in fuzzy-merges that finish in linear time.
• Downloads: 5253

Add your own package

If your package is on CRAN, you do not need to worry. It will be added to this list automatically. If your package is not on CRAN but you want to promote it here, you will need to submit a PR. The process is very simple. All you need to do is add a new line to path-to-description.txt with the path to your package DESCRIPTION in a remote repository. The path must be a valid connection (on GitHub, this requires linking to the raw content of DESCRIPTION). You can test that the path works using read.dcf(url(<path>)).