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jsonlite - A Simple and Robust JSON Parser and Generator for R

A reasonably fast JSON parser and generator, optimized for statistical data and the web. Offers simple, flexible tools for working with JSON in R, and is particularly powerful for building pipelines and interacting with a web API. The implementation is based on the mapping described in the paper (Ooms, 2014) <doi:10.48550/arXiv.1403.2805>. In addition to converting JSON data from/to R objects, 'jsonlite' contains functions to stream, validate, and prettify JSON data. The unit tests included with the package verify that all edge cases are encoded and decoded consistently for use with dynamic data in systems and applications.

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jsonparser

21.61 score 403 stars 9.6k dependents 67k scripts 1.7M downloads

curl - A Modern and Flexible Web Client for R

Bindings to 'libcurl' <https://curl.se/libcurl/> for performing fully configurable HTTP/FTP requests where responses can be processed in memory, on disk, or streaming via the callback or connection interfaces. Some knowledge of 'libcurl' is recommended; for a more-user-friendly web client see the 'httr2' package which builds on this package with http specific tools and logic.

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curl

19.92 score 234 stars 6.5k dependents 5.6k scripts 1.3M downloads

fs - Cross-Platform File System Operations Based on 'libuv'

A cross-platform interface to file system operations, built on top of the 'libuv' C library.

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filesystemlibuvlibuv1cpp

18.82 score 386 stars 6.1k dependents 166 scripts 1.9M downloads

openssl - Toolkit for Encryption, Signatures and Certificates Based on OpenSSL

Bindings to OpenSSL libssl and libcrypto, plus custom SSH key parsers. Supports RSA, DSA and EC curves P-256, P-384, P-521, and curve25519. Cryptographic signatures can either be created and verified manually or via x509 certificates. AES can be used in cbc, ctr or gcm mode for symmetric encryption; RSA for asymmetric (public key) encryption or EC for Diffie Hellman. High-level envelope functions combine RSA and AES for encrypting arbitrary sized data. Other utilities include key generators, hash functions (md5, sha1, sha256, etc), base64 encoder, a secure random number generator, and 'bignum' math methods for manually performing crypto calculations on large multibyte integers.

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openssl

18.37 score 67 stars 5.6k dependents 2.1k scripts 988k downloads

magick - Advanced Graphics and Image-Processing in R

Bindings to 'ImageMagick': the most comprehensive open-source image processing library available. Supports many common formats (png, jpeg, tiff, pdf, etc) and manipulations (rotate, scale, crop, trim, flip, blur, etc). All operations are vectorized via the Magick++ STL meaning they operate either on a single frame or a series of frames for working with layers, collages, or animation. In RStudio images are automatically previewed when printed to the console, resulting in an interactive editing environment. Also includes a graphics device for creating drawing onto images using pixel coordinates.

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image-manipulationimage-processingimagemagickcpp

17.67 score 484 stars 334 dependents 18k scripts 159k downloads

xml2 - Parse XML

Bindings to 'libxml2' for working with XML data using a simple, consistent interface based on 'XPath' expressions. Also supports XML schema validation; for 'XSLT' transformations see the 'xslt' package.

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libxml2xmlcpp

17.27 score 226 stars 2.7k dependents 106 scripts 901k downloads

gert - Simple Git Client for R

Simple git client for R based on 'libgit2' <https://libgit2.org> with support for SSH and HTTPS remotes. All functions in 'gert' use basic R data types (such as vectors and data-frames) for their arguments and return values. User credentials are shared with command line 'git' through the git-credential store and ssh keys stored on disk or ssh-agent.

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libgit2

15.56 score 162 stars 381 dependents 506 scripts 180k downloads

pdftools - Text Extraction, Rendering and Converting of PDF Documents

Utilities based on 'libpoppler' <https://poppler.freedesktop.org> for extracting text, fonts, attachments and metadata from a PDF file. Also supports high quality rendering of PDF documents into PNG, JPEG, TIFF format, or into raw bitmap vectors for further processing in R.

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pdf-filespdf-formatpdftoolspopplerpoppler-librarytext-extractioncpp

14.31 score 554 stars 65 dependents 5.3k scripts 64k downloads

V8 - Embedded JavaScript and WebAssembly Engine for R

An R interface to V8 <https://v8.dev>: Google's open source JavaScript and WebAssembly engine. This package can be compiled either with V8 or NodeJS when built as a shared library.

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javascriptlibv8wasmcpp

14.25 score 207 stars 469 dependents 2 scripts 303k downloads

RMySQL - Database Interface and 'MySQL' Driver for R

Legacy 'DBI' interface to 'MySQL' / 'MariaDB' based on old code ported from S-PLUS. A modern 'MySQL' client written in 'C++' is available from the 'RMariaDB' package.

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databasemysql

13.23 score 209 stars 12 dependents 5.4k scripts 28k downloads

sys - Powerful and Reliable Tools for Running System Commands in R

Drop-in replacements for the base system2() function with fine control and consistent behavior across platforms. Supports clean interruption, timeout, background tasks, and streaming STDIN / STDOUT / STDERR over binary or text connections. Arguments on Windows automatically get encoded and quoted to work on different locales.

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12.83 score 106 stars 5.5k dependents 2 scripts 775k downloads

commonmark - High Performance CommonMark and Github Markdown Rendering in R

The CommonMark specification <https://github.github.com/gfm/> defines a rationalized version of markdown syntax. This package uses the 'cmark' reference implementation for converting markdown text into various formats including html, latex and groff man. In addition it exposes the markdown parse tree in xml format. Also includes opt-in support for GFM extensions including tables, autolinks, and strikethrough text.

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cmarkcmark-gfmgfmmarkdown

12.24 score 102 stars 2.7k dependents 4 scripts 605k downloads

askpass - Password Entry Utilities for R, Git, and SSH

Cross-platform utilities for prompting the user for credentials or a passphrase, for example to authenticate with a server or read a protected key. Includes native programs for MacOS and Windows, hence no 'tcltk' is required. Password entry can be invoked in two different ways: directly from R via the askpass() function, or indirectly as password-entry back-end for 'ssh-agent' or 'git-credential' via the SSH_ASKPASS and GIT_ASKPASS environment variables. Thereby the user can be prompted for credentials or a passphrase if needed when R calls out to git or ssh.

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11.75 score 88 stars 5.4k dependents 1 scripts 781k downloads

credentials - Tools for Managing SSH and Git Credentials

Setup and retrieve HTTPS and SSH credentials for use with 'git' and other services. For HTTPS remotes the package interfaces the 'git-credential' utility which 'git' uses to store HTTP usernames and passwords. For SSH remotes we provide convenient functions to find or generate appropriate SSH keys. The package both helps the user to setup a local git installation, and also provides a back-end for git/ssh client libraries to authenticate with existing user credentials.

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gitpasswordssh

11.14 score 75 stars 396 dependents 2 scripts 153k downloads

tesseract - Open Source OCR Engine

Bindings to 'Tesseract': a powerful optical character recognition (OCR) engine that supports over 100 languages. The engine is highly configurable in order to tune the detection algorithms and obtain the best possible results.

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ocrtesseracttesseract-ocrcpp

10.89 score 252 stars 1 dependents 567 scripts 12k downloads

hunspell - High-Performance Stemmer, Tokenizer, and Spell Checker

Low level spell checker and morphological analyzer based on the famous 'hunspell' library <https://hunspell.github.io>. The package can analyze or check individual words as well as parse text, latex, html or xml documents. For a more user-friendly interface use the 'spelling' package which builds on this package to automate checking of files, documentation and vignettes in all common formats.

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hunspellspell-checkspellcheckerstemmertokenizercpp

10.70 score 116 stars 39 dependents 8 scripts 62k downloads

mongolite - Fast and Simple 'MongoDB' Client for R

High-performance MongoDB client based on 'mongo-c-driver' and 'jsonlite'. Includes support for aggregation, indexing, map-reduce, streaming, encryption, enterprise authentication, and GridFS. The online user manual provides an overview of the available methods in the package: <https://jeroen.github.io/mongolite/>.

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cyrus-sasl2opensslglibczlib

10.61 score 289 stars 14 dependents 1.0k scripts 8.1k downloads

sodium - A Modern and Easy-to-Use Crypto Library

Bindings to 'libsodium' <https://doc.libsodium.org/>: a modern, easy-to-use software library for encryption, decryption, signatures, password hashing and more. Sodium uses curve25519, a state-of-the-art Diffie-Hellman function by Daniel Bernstein, which has become very popular after it was discovered that the NSA had backdoored Dual EC DRBG.

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libsodium

10.46 score 74 stars 59 dependents 2 scripts 28k downloads

jose - JavaScript Object Signing and Encryption

Read and write JSON Web Keys (JWK, rfc7517), generate and verify JSON Web Signatures (JWS, rfc7515) and encode/decode JSON Web Tokens (JWT, rfc7519) <https://datatracker.ietf.org/wg/jose/documents/>. These standards provide modern signing and encryption formats that are natively supported by browsers via the JavaScript WebCryptoAPI <https://www.w3.org/TR/webcrypto/#jose>, and used by services like OAuth 2.0, LetsEncrypt, and Github Apps.

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10.43 score 54 stars 56 dependents 2 scripts 75k downloads

rsvg - Render SVG Images into PDF, PNG, (Encapsulated) PostScript, or Bitmap Arrays

Renders vector-based svg images into high-quality custom-size bitmap arrays using 'librsvg2'. The resulting bitmap can be written to e.g. png, jpeg or webp format. In addition, the package can convert images directly to various formats such as pdf or postscript.

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librsvgcairoglib

10.10 score 103 stars 61 dependents 11 scripts 60k downloads

gifski - Highest Quality GIF Encoder

Multi-threaded GIF encoder written in Rust: <https://gif.ski/>. Converts images to GIF animations using pngquant's efficient cross-frame palettes and temporal dithering with thousands of colors per frame.

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rustcargo

9.95 score 75 stars 11 dependents 4.1k scripts 18k downloads

ssh - Secure Shell (SSH) Client for R

Connect to a remote server over SSH to transfer files via SCP, setup a secure tunnel, or run a command or script on the host while streaming stdout and stderr directly to the client.

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libsshsshssh-client

9.65 score 130 stars 12 dependents 2.7k downloads

qpdf - Split, Combine and Compress PDF Files

Content-preserving transformations transformations of PDF files such as split, combine, and compress. This package interfaces directly to the 'qpdf' C++ library <https://qpdf.sourceforge.io/> and does not require any command line utilities. Note that 'qpdf' does not read actual content from PDF files: to extract text and data you need the 'pdftools' package.

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libjpeg-turbozlibcpp

9.26 score 64 stars 98 dependents 2 scripts 49k downloads

spelling - Tools for Spell Checking in R

Spell checking common document formats including latex, markdown, manual pages, and description files. Includes utilities to automate checking of documentation and vignettes as a unit test during 'R CMD check'. Both British and American English are supported out of the box and other languages can be added. In addition, packages may define a 'wordlist' to allow custom terminology without having to abuse punctuation.

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spell-checkspell-checkerspellcheckspellcheckerspelling

9.13 score 108 stars 14 dependents 1 scripts 60k downloads

js - Tools for Working with JavaScript in R

A set of utilities for working with JavaScript syntax in R. Includes tools to parse, tokenize, compile, validate, reformat, optimize and analyze JavaScript code.

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8.76 score 67 stars 1 dependents 127 scripts 2.3k downloads

katex - Rendering Math to HTML, 'MathML', or R-Documentation Format

Convert latex math expressions to HTML and 'MathML' for use in markdown documents or package manual pages. The rendering is done in R using the V8 engine (i.e. server-side), which eliminates the need for embedding the 'MathJax' library into your web pages. In addition a 'math-to-rd' wrapper is provided to automatically render beautiful math in R documentation files.

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8.69 score 36 stars 12 dependents 51 scripts 15k downloads

jqr - Client for 'jq', a 'JSON' Processor

Client for 'jq', a 'JSON' processor (<https://jqlang.github.io/jq/>), written in C. 'jq' allows the following with 'JSON' data: index into, parse, do calculations, cut up and filter, change key names and values, perform conditionals and comparisons, and more.

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jqjson

8.40 score 145 stars 34 dependents 5.7k downloads

opencpu - Producing and Reproducing Results

A system for embedded scientific computing and reproducible research with R as described in <doi:10.48550/arXiv.1406.4806>. The OpenCPU server exposes a simple but powerful HTTP api for RPC and data interchange with R. This provides a reliable and scalable foundation for statistical services or building R web applications. The OpenCPU server runs either as a single-user development server within the interactive R session, or as a multi-user Linux stack based on Apache2. The entire system is fully open source and permissively licensed. The OpenCPU website has detailed documentation and example apps.

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8.35 score 763 stars 2 dependents 196 scripts 969 downloads

av - Working with Audio and Video in R

Bindings to 'FFmpeg' <http://www.ffmpeg.org/> AV library for working with audio and video in R. Generates high quality video from images or R graphics with custom audio. Also offers high performance tools for reading raw audio, creating 'spectrograms', and converting between countless audio / video formats. This package interfaces directly to the C API and does not require any command line utilities.

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ffmpeg

8.01 score 94 stars 16 dependents 7 scripts 11k downloads

opencv - Bindings to 'OpenCV' Computer Vision Library

Exposes some of the available 'OpenCV' <https://opencv.org/> algorithms, such as a QR code scanner, and edge, body or face detection. These can either be applied to analyze static images, or to filter live video footage from a camera device.

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opencvopencv-libraryunconfunconf18cpp

7.86 score 143 stars 162 scripts 1.6k downloads