mafintosh/csv-parser

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Streaming csv parser inspired by binary-csv that aims to be faster than everyone else

Stars: 1.5k
Forks: 143
Open beginner issues: 0
Indexed issues: 39

Dominant language: JavaScript
License: MIT
Last GitHub push: May 7, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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39 issues indexed so far

raw: true yields empty rows since 3.2.1 — all headers nulled by sanitizeHeader's string type check Open

Difficulty 2/5 1-3 hours Newbie friendliness 75/100

mafintosh/csv-parser#251 · 6 reactions · Opened Jun 12, 2026
[Feature request] Skip lines until certain text appears Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

mafintosh/csv-parser#245 · 1 comment · Opened Nov 4, 2025
Why's this code so ugly? Open

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

mafintosh/csv-parser#244 · 1 reaction · Opened Jul 21, 2025
Missing release notes after 3.0 release Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

mafintosh/csv-parser#242 · Opened Apr 22, 2025
Row value cannot be accessed at expected key despite row object having expected keys and values Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

mafintosh/csv-parser#237 · 2 comments · Opened Jun 11, 2024
double quote in data makes parsing exit early without error Open

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

mafintosh/csv-parser#236 · 1 reaction · Opened Feb 22, 2024
`\r` and `\n` arriving in separate chunks breaks line separator detection Open

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

mafintosh/csv-parser#234 · 1 comment · 2 reactions · Opened Sep 25, 2023
Skip Empty Lines Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

mafintosh/csv-parser#230 · 1 reaction · Opened Apr 7, 2023
Error on "reserved property names"? Open

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

mafintosh/csv-parser#228 · Opened Apr 7, 2023
Web streams Open

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

mafintosh/csv-parser#227 · 1 comment · 3 reactions · Opened Mar 26, 2023
Using async function to make await call Open

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

mafintosh/csv-parser#226 · 4 comments · Opened Mar 24, 2023
async/await in event headers not work as expected Open

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

mafintosh/csv-parser#225 · Opened Mar 4, 2023
When parsing a CSV that has headers with 2 or more matching names, data is lost Open

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

mafintosh/csv-parser#224 · 1 comment · 3 reactions · Opened Feb 13, 2023
is mapValues called on skipped lines? Open

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

mafintosh/csv-parser#222 · 1 comment · Opened Dec 31, 2022
Document CSV Specification Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

mafintosh/csv-parser#219 · Opened Oct 7, 2022
Column headers with the non unique names are replacing each other Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

mafintosh/csv-parser#218 · Opened Jul 22, 2022
Minimist vulnerability CVE-2021-44906 Open

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

mafintosh/csv-parser#214 · 1 comment · 6 reactions · Opened Mar 22, 2022
csv-parser fails when given a stream from `Stream` instead of `fs` Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

mafintosh/csv-parser#213 · 1 comment · Opened Mar 13, 2022
How to use "Options" ? Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

mafintosh/csv-parser#212 · Opened Mar 5, 2022
Leading Zero issue for integer Open

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

mafintosh/csv-parser#210 · Opened Dec 21, 2021
process exits on apple silicon Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

mafintosh/csv-parser#208 · Opened Dec 4, 2021
csv-parser does not parse big csv file correct, after ~95K rows it begins merge all rows in single JSON. Open

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

mafintosh/csv-parser#207 · 2 comments · Opened Nov 30, 2021
[category- help] .on('end', ...) not waiting till process inside .on('data', ...) is completed. Open

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

mafintosh/csv-parser#206 · 4 comments · Opened Nov 5, 2021
Error handling Open

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

mafintosh/csv-parser#205 · 1 comment · 2 reactions · Opened Aug 11, 2021
ECCN question Open

Difficulty 4/5 3-5 days Newbie friendliness 10/100

mafintosh/csv-parser#203 · Opened Aug 4, 2021
Read csv with multiple line breaks (\r, \n, \r\n) Open

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

mafintosh/csv-parser#201 · 1 comment · Opened May 20, 2021
i modify csv content in csv-parser, after i want to covert new csv content to file, what should i do? Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

mafintosh/csv-parser#198 · Opened Apr 23, 2021
latin1 supplement separator not working Open

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

mafintosh/csv-parser#195 · 2 comments · Opened Feb 16, 2021
strict mode emit error Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

mafintosh/csv-parser#194 · 2 comments · 1 reaction · Opened Feb 15, 2021
Encoded characters when reading utf16 Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

mafintosh/csv-parser#184 · 1 reaction · Opened Nov 5, 2020
[HELP] Why does csv-parser skips headers with empty data? Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

mafintosh/csv-parser#181 · 1 comment · Opened Sep 26, 2020
Custom fields order Open

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

mafintosh/csv-parser#176 · Opened Jul 5, 2020
Option 'reduceValues' to give users control over the object constructed for eah row Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

mafintosh/csv-parser#174 · 4 reactions · Opened Jun 19, 2020
Pass original row in "on" callback Open

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

mafintosh/csv-parser#173 · 4 reactions · Opened Jun 17, 2020
Provide "isQuoted" information to mapValues function Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

mafintosh/csv-parser#172 · Opened Jun 7, 2020
Example of browser usage? Open

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

mafintosh/csv-parser#167 · 7 comments · 5 reactions · Opened May 4, 2020
Invalid row produced when input data is differently chunked Open

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

mafintosh/csv-parser#159 · Opened Mar 10, 2020
strict: false - headers lost after row with wrong number of columns Open

c³ ⋅ PR welcome

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

mafintosh/csv-parser#150 · 4 comments · 4 reactions · Opened Oct 10, 2019
Double quotes in double-quoted values not handled correctly Open

c³ ⋅ PR welcome t¹ 🐞 bug

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

mafintosh/csv-parser#70 · 10 comments · 12 reactions · Opened May 9, 2017

mafintosh/csv-parser

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