Issues

• Four streaming defects: chunk-boundary UTF-8 corruption, cached line-ending guess, header dedupe on resume, and no backpressure under pause()

  mholt/PapaParse#1132 · Filter by author lenamonj opened on Jul 27, 2026
  4

• Bug: worker: true returns malformed parse results in Vite v8 production builds

  mholt/PapaParse#1122 · Filter by author milachae opened on May 27, 2026
  4

• [Feature] Add automatic header detection

  mholt/PapaParse#1121 · Filter by author cow1337killer3 opened on May 10, 2026

• "guessDelimiter" checks 10 rows, ignoring "preview" property

  mholt/PapaParse#1116 · Filter by author FedericoGarciaGarcia opened on Feb 27, 2026
  1

• Per-row validation

  mholt/PapaParse#1112 · Filter by author sosherof opened on Nov 3, 2025
  2

• False positive UndetectableDelimiter error when parsing single-column CSV

  mholt/PapaParse#1111 · Filter by author arberiii opened on Oct 24, 2025
  1

• parse stream will emit an error when newline is \r\n and the chunk data end with \r.

  mholt/PapaParse#1103 · Filter by author acrazing opened on Aug 12, 2025

• transformHeader renaming and ignoring not working as expected

  unconfirmed bug
  mholt/PapaParse#1098 · Filter by author cjrobbertse-ob opened on Jun 30, 2025
  6

• [Feature Request] receiving data as object WITHOUT having header row

  v6-todo
  mholt/PapaParse#1089 · Filter by author svenja-haas opened on Feb 21, 2025
  1

• Papaparse 5.5.2 in GraalVM Papa is not exported to globalscope

  mholt/PapaParse#1088 · Filter by author kempe63 opened on Feb 10, 2025

• question on dynamic typing for boolean types when encountering title cases (ie: True/False)

  v6-todo
  mholt/PapaParse#1084 · Filter by author rdai10 opened on Jan 25, 2025
  1

• Incorrect handling of windows line endings

  v6-todo
  mholt/PapaParse#1082 · Filter by author esetnik opened on Jan 13, 2025
  4

• Automatic CSV delimiter detection

  enhancementhelp wantedv6-todo
  mholt/PapaParse#1081 · Filter by author ws-garcia opened on Jan 12, 2025
  2

• dynamicTyping treating "713752e1" as a number

  v6-todo
  mholt/PapaParse#1078 · Filter by author adrianboimvaser opened on Jan 8, 2025
  1

• Parse a large uploaded gzipped csv file in the browser

  mholt/PapaParse#1074 · Filter by author psaffrey-biomodal opened on Nov 13, 2024

• One-line large CSV file is not chunked

  wontfix
  mholt/PapaParse#1073 · Filter by author bogdan-bondar opened on Oct 31, 2024
  1

• Papa.parse(): comments donot support newline

  duplicategremlin-mode
  mholt/PapaParse#1072 · Filter by author Joelei opened on Oct 31, 2024
  2

• Can't parse CSV with quoted values

  unconfirmed bug
  mholt/PapaParse#1071 · Filter by author edossantos-sipcaller opened on Oct 24, 2024
  4

• Dynamic typing not work with exponent notation for positive number like "+1.5E-3"

  v6-todo
  mholt/PapaParse#1070 · Filter by author david-therincourt opened on Oct 10, 2024
  1

• newline should accept regex

  gremlin-mode
  mholt/PapaParse#1069 · Filter by author candidia opened on Oct 3, 2024
  1

• Bug: wrong dynamic typing when first rows are of a different type

  mholt/PapaParse#1067 · Filter by author nonodev96 opened on Sep 26, 2024

• Please indicate in documentation what default value is for config.encoding

  mholt/PapaParse#1063 · Filter by author ianengelbrecht opened on Aug 8, 2024

• RollupError when deploying to Cloudflare

  v6-todo
  mholt/PapaParse#1056 · Filter by author mendrinos opened on May 31, 2024
  10

• Incorrect parse row in CSV

  v6-todo
  mholt/PapaParse#1055 · Filter by author FilippoSalvarani21 opened on May 23, 2024
  2

• Step meta.cursor not correctly outputting current byte correctly when using parser.pause() 5.3.2

  mholt/PapaParse#1054 · Filter by author eeeBs opened on May 22, 2024