metosin/jsonista

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Clojure library for fast JSON encoding and decoding.

Stars: 472
Forks: 31
Open beginner issues: 0
Indexed issues: 20
Avg merge: 4m
Merged PRs (30d): 1

Dominant language: Clojure
License: EPL-2.0
Last GitHub push: Aug 31, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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20 open issues indexed

Jackson 3.x usage Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

metosin/jsonista#89 · 2 comments · Opened Oct 28, 2025
read-values can't read sequence of arrays Open

bug

Difficulty 3/5 1-2 days Newbie friendliness 42/100

metosin/jsonista#88 · 2 comments · 2 reactions · Opened Jul 14, 2025
Duplicate key on output Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

metosin/jsonista#87 · 1 comment · Opened Jan 22, 2025
Change in behaviour - 0.3.8 -> 0.3.9 Open

help wanted

Difficulty 4/5 3-5 days Newbie friendliness 35/100

metosin/jsonista#77 · 1 comment · Opened Jul 3, 2024
how to apply key-decode-fn only to top level keys Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

metosin/jsonista#72 · Opened Jul 21, 2023
Attributes are out of order when doing a roundtrip Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

metosin/jsonista#69 · Opened Apr 20, 2023
Add custom serializers for KV reducible maps Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

metosin/jsonista#68 · 5 comments · Opened Dec 20, 2022
keywordizing values Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

metosin/jsonista#65 · 1 comment · Opened Oct 18, 2022
InputStream question Open

Difficulty 2/5 1-3 hours Newbie friendliness 30/100

metosin/jsonista#59 · 2 comments · Opened Oct 21, 2021
`nil` as a key in map throws an Exception Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

metosin/jsonista#57 · 2 comments · Opened Aug 26, 2021
Keyword deserializer slower than custom cache Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

metosin/jsonista#56 · Opened Jun 19, 2021
Add a lazy sequence serializer Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

metosin/jsonista#52 · Opened May 19, 2021
Fallback serializers? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

metosin/jsonista#48 · 1 reaction · Opened Mar 23, 2021
Default Date encoder doesn't preserve milliseconds Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

metosin/jsonista#43 · 2 comments · Opened Jan 12, 2021
read-value fails on empty string Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

metosin/jsonista#31 · 6 comments · 3 reactions · Opened May 18, 2020
Lazy keys are not forced Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

metosin/jsonista#30 · 1 comment · Opened Apr 6, 2020
Support data-driven custom formats for JavaTime classes Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

metosin/jsonista#29 · 2 reactions · Opened Mar 20, 2020
annotations support Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

metosin/jsonista#28 · 2 comments · Opened Mar 17, 2020
Serializing with a partially deserialized object Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

metosin/jsonista#27 · Opened Mar 10, 2020
Warn on incorrect Jackson version at runtime? Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

metosin/jsonista#22 · 5 reactions · Opened Aug 9, 2019

metosin/jsonista

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