R Observatory: Metrics for jsonlite version 2.0.0

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

jsonlite

2.0.0

A Simple and Robust JSON Parser and Generator for R

1,761packages dependsuggested by 348

18.7Mdownloads / year

65.1%test coverage

6/13flavors OK

Overview

About

Maintained by Jeroen OomsCRAN page ↗GitHub ↗Website ↗Issues ↗

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 vignette (Ooms, 2014). 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.

Changes in 2.0.0

Output for toJSON(x, pretty = p) where p is a number has changed: now uses the same r-based indent system as for pretty = TRUE. To get the old format, run json output through prettify().
Both toJSON() and prettify() support now can use tabs instead of spaces by setting a negative number as indent/pretty argument.
Fix an ubsan warning in prettify/minify in libyajl
Reformatted code with air

From NEWS in the release

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("jsonlite", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("jeroen/jsonlite")

Development version from jeroen/jsonlite. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-jsonlite

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-jsonlite

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-jsonlite

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

2ERROR5NOTE6OK

Check messages

ERRORre-building of vignette outputsr-oldrel-macos-arm64, r-release-macos-x86_64

r-oldrel-macos-arm64

Error(s) in re-building vignettes:
--- re-building ‘json-aaquickstart.Rmd’ using rmarkdown
[WARNING] This document format requires a nonempty <title> element.
  Defaulting to 'json-aaquickstart.knit' as the title.
  To specify a title, use 'title' in metadata or --metadata title="...".
--- finished re-building ‘json-aaquickstart.Rmd’

--- re-building ‘json-apis.Rmd’ using rmarkdown
--- finished re-building ‘json-apis.Rmd’

--- re-building ‘json-paging.Rmd’ using rmarkdown
--- finished re-building ‘json-paging.Rmd’

--- re-building ‘json-mapping.pdf.asis’ using asis
--- finished re-building ‘json-mapping.pdf.asis’

Error in loadVignetteBuilder(pkgdir) : vignette builder 'R.rsp' not found
Calls: <Anonymous> -> loadVignetteBuilder
Execution halted
SUMMARY: processing the following file failed:
  ‘json-opencpu.pdf.asis’

Error: Vignette re-building failed.
Execution halted

r-release-macos-x86_64

Error(s) in re-building vignettes:
Error in loadVignetteBuilder(pkgdir) : vignette builder 'R.rsp' not found
Calls: <Anonymous> -> loadVignetteBuilder
Execution halted
Error in loadVignetteBuilder(pkgdir) : vignette builder 'R.rsp' not found
Calls: <Anonymous> -> loadVignetteBuilder
Execution halted
Error in loadVignetteBuilder(pkgdir) : vignette builder 'R.rsp' not found
Calls: <Anonymous> -> loadVignetteBuilder
Execution halted
Error in loadVignetteBuilder(pkgdir) : vignette builder 'R.rsp' not found
Calls: <Anonymous> -> loadVignetteBuilder
Execution halted
--- re-building ‘json-opencpu.pdf.asis’ using asis
--- finished re-building ‘json-opencpu.pdf.asis’

SUMMARY: processing the following files failed:
  ‘json-aaquickstart.Rmd’ ‘json-apis.Rmd’ ‘json-paging.Rmd’
  ‘json-mapping.pdf.asis’

Error: Vignette re-building failed.
Execution halted

NOTER code for possible problemsr-devel-linux-x86_64-debian-clang, r-devel-linux-x86_64-debian-gcc, r-devel-linux-x86_64-fedora-clang, r-devel-linux-x86_64-fedora-gcc, r-devel-windows-x86_64

Found calls to structure() using deprecated special names:
  jsonlite/R/helpfunctions.R (.Names: 1)
  jsonlite/tests/testthat/test-toJSON-NULL-values.R (.Names: 1)
'.Names' should be changed to 'names'.

CRAN check page ↗

Slowest check: 2.8 min · r-devel-windows-x86_64

Status changes

ERROR6 OK, 5 NOTE, 2 ERRORNow
ERROR13 OK, 1 ERROR2026-03-10

Advisories

Earlier advisories (1)Hide earlier advisories (1)

RSEC-2023-3Memory leak vulnerability
0.9.12 to 1.8.7, fixed in 1.8.8, 2023-07-18, CVE-2023-33460 Medium 6.5

How this is measured·How advisories are found

Documentation

In release 2.0.0

README· In the repository, left out of the releaseVignettesYes · 5 · dynamicNEWSYes · 100% structured · mentions 2.0.0Citation fileYes · cites a publicationWebsiteYes

Help pages: 11
Examples that run: 100%11 run in a plain check
Exported functions with examples: 100%
Documented parameters: 100%
Return-value docs: 18%
Help pages citing references: 27%

Vignettes (5)

How these are measured

Downloads

18.7M

CRAN downloads in the past year

Rank #16 · ~51.1K/day · ~1.6M/mo

Releases R versions

Daily download trend is not available in this view yet.

1.5M30 days

4.8M90 days

18.7M1 year

Compare downloads with other packages →

Also on251.6K r2u1.8K autocran1.8M conda_forge915 bioconda23.5K c2d4u

How downloads are counted

Repository

jeroen/jsonlite ↗Account: jeroen

403Stars

46Forks

110Open issues

12Open PRs

37Releases

1,102Commits

31Commit identities

jsonrrstatsparser

1,102 commits · Last activity 2026-09-28 · 0% stars, 30d · Default branch at 2.0.1, ahead of CRAN 2.0.0 (checked 2026-10-11)

Responsiveness

How these are sampled

PRs merged (all time): 51%
Median days to close, 50 most recently updated closed issues: 1
Median days to close, 50 most recently updated closed PRs: 6

Stars over time

2025-10-07 · 3912026-07-26 · 403

How these are measured

PracticesBeta

6 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/jeroen/jsonlite on 2026-10-11.

Continuous integration (2)

GitHub ActionsR CMD check workflow

The R CMD check workflow runs on Linux, macOS and Windows, and on R-devel

Governance and community (1)

Code of conduct

Lint, format, editor (2)

AirRStudio project

Git structural (1)

.gitattributes

How this is detected·Detection ruleset v3 (2026-09-26)

AI coding toolsBeta

This repository shows signs of AI coding tools.

Claude Codefirst seen on or before 2026-07-22
Commits: at least 1 crediting it in the message
GitHub Copilotfirst seen 2026-07-22
Pull request: opened by its own account

Models named in its commits

Claude Fable 51 commit · Jul 2026

Counts are commits, not lines of code. Commits by a tool's accounts count once across all of its accounts. Commits crediting it are the largest count among its credit lines, a minimum.How this is detected·Detection ruleset v4 (updated 2026-09-27)

Dependencies

Declared dependencies

7 external dependencies (excludes base and recommended)

Installing jsonlite adds no packages beyond those that come with R.

Depends (1)

methods

Imports (0)

none

LinkingTo (0)

none

Suggests (7)

httr vctrs testthat knitr rmarkdown R.rsp sf

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1,761direct

4,924indirect

Depends 15 · Imports 1,746

Suggested by 348

Show the 48 most downloaded dependentsHide the 48 most downloaded dependents

Depends, Imports or LinkingTo, most downloaded first

and 1,713 more dependents and 348 packages that suggest it on CRAN ↗

How these are counted

Code & Tests

People & History

People (3)

Jeroen Ooms

Author, Maintainer since 0.9.0 (2013)

Duncan Temple Lang

Contributor

Lloyd Hilaiel

Copyright holder · added in 0.9.15

author of bundled libyajl

Listed in earlier versions (1)

Jonathan Wallace

no longer listed · 0.9.4 to 0.9.11

Releases (46)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
2.0.0Latest
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2025-03-27 · current release · diff ↗
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1.9.0
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2024-09-20 · diff ↗
R
R 4.4.0 released · 2024-04-24
1.8.8
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2023-12-04 · diff ↗
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2023-06-30 · diff ↗
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R 4.3.0 released · 2023-04-21
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2022-12-06 · diff ↗
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2022-10-21 · diff ↗
1.8.2◆
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2022-10-02 · diff ↗
1.8.1◆
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2022-10-01 · diff ↗ ·
added 6 exports
as_gzjson_b64, as_gzjson_raw, base64url_dec, base64url_enc, parse_gzjson_b64, parse_gzjson_raw
R
R 4.2.0 released · 2022-04-22

Show 44 earlier eventsHide 44 earlier events

1.8.0◆
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2022-02-22 · diff ↗
1.7.3◆
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2022-01-17 · diff ↗
R
R 4.1.0 released · 2021-05-18
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2020-12-09 · diff ↗
1.7.1◆
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2020-06-25 · diff ↗
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R 4.0.0 released · 2020-04-24
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2020-02-02 · diff ↗
R
R 3.6.0 released · 2019-04-26
1.6◆
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2018-12-07 · diff ↗ ·
removed 1 export
rbind.pages

added 1 export
parse_json
R
R 3.5.0 released · 2018-04-23
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2017-06-01 · diff ↗ ·
added 1 export
rbind_pages
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R 3.4.0 released · 2017-04-21
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2017-04-08 · diff ↗
1.3◆
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2017-02-28 · diff ↗
1.2◆
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2016-12-31 · diff ↗ ·
added 2 exports
read_json, write_json
1.1◆
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2016-09-14 · diff ↗
1.0◆
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2016-07-01 · diff ↗ ·
added 2 exports
base64_dec, base64_enc
0.9.22◆
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R 3.3.0 released · 2016-05-03
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2015-11-28 · diff ↗ ·
removed 1 export
View
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removed 1 export
toMongo
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R 3.2.0 released · 2015-04-16
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2015-04-11 · diff ↗
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2015-03-26 · diff ↗ ·
removed 1 export
toMongo

added 5 exports
View, flatten, rbind.pages, stream_in, stream_out
0.9.14◆
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2014-12-01 · diff ↗
0.9.13◆
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2014-10-21 · diff ↗
0.9.12◆
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2014-10-21 · diff ↗ ·
added 3 exports
flatten, stream_in, stream_out
0.9.11
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2014-09-05 · diff ↗
0.9.10
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2014-08-03 · diff ↗ ·
added 2 exports
View, rbind.pages
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2014-04-18 · diff ↗
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R 3.1.0 released · 2014-04-10
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2014-04-05 · diff ↗
0.9.5
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2014-03-27 · diff ↗ ·
removed 5 exports
View, flatten, rbind.pages, stream_in, stream_out

added 1 export
toMongo
0.9.4
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2014-03-01 · diff ↗ ·
added 2 exports
minify, unbox
0.9.3
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2014-01-02 · diff ↗
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2013-12-12 · diff ↗
0.9.0
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2013-12-03
R
R 3.0.0 released · 2013-04-03

Package metadata

First published: 2013-12-03
Total releases: 46 / 13 yrs
License: MIT + file LICENSE OSI · relicensed from Apache License 2.0 in 0.9.14
Download size: 1.0 MB

Appears in task views

Web Technologies and Services

Cite

Cite this package

Run in R for the authors' entry:

citation("jsonlite")

The package provides a citation file, so citation() returns the authors' own entry.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for jsonlite version 2.0.0 [Data set]. HJJB, LLC. Data release v2026-10-17. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-17, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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