# mholt/PapaParse

Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input

Repository: https://github.com/mholt/PapaParse
Canonical: https://ross.abutalabs.com/products/papaparse
Homepage: http://PapaParse.com
Language: JavaScript
License: MIT
License Family: permissive
Topics: csv, javascript, csv-parser
Last push: 2026-08-24T14:37:08+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 4713, "days_push": 9, "days_rel": 9, "gap_med": 11, "n_releases_24m": 2}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 13550, forks 1186 (observed 2026-08-28T04:11:03.529104+00:00)

## What it is
Papa Parse is a fast, dependency-free CSV (delimited text) parser for JavaScript that runs in the browser and Node.js. It streams large files via web workers, auto-detects delimiters, handles malformed input per RFC 4180, and converts both CSV-to-JSON and JSON-to-CSV.

## Use cases
- parse csv files in the browser
- convert csv to  in javascript
- convert  to csv for export
- stream and parse a multi-gigabyte csv without crashing the page
- parse a remote csv file over http
- auto-detect the delimiter of a delimited text file
- parse csv uploads client-side without sending data to a server
- parse csv streams in node.js

## When to choose
- you need a battle-tested, RFC 4180-correct CSV parser in JavaScript
- you must parse very large CSV files in the browser without blocking the UI
- you want client-side CSV processing for privacy reasons
- you need both CSV parsing and unparse (JSON to CSV) with no dependencies

## When to avoid
- you need full ETL pipelines or data-frame analytics rather than parsing
- you work in a non-JavaScript stack with mature native CSV tooling
- you need writing very exotic delimited formats with custom quoting beyond CSV conventions

## Facets
- artifact type: library
- maturity: stable
- function: parser, serialization, csv, developer-tools
- domain: files, web-development, developer-tools
- platform: browser, cross-platform
- tags: csv-parser, csv-to-, -to-csv, streaming, web-workers, delimiter-detection, no-dependencies, data-engineering, nodejs, web-server

## Member repositories
- mholt/PapaParse (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:03.529104+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:13:13.105968+00:00, confidence not recorded.
  - readme: https://github.com/mholt/PapaParse (fetched 2026-08-28T04:11:03.529104+00:00, sha 340b8530a4bb)
  - homepage: http://PapaParse.com (fetched 2026-08-29T08:08:19.155731+00:00, sha 75c4e853987a)
  - site_page: https://www.papaparse.com/docs (fetched 2026-08-29T08:08:19.165402+00:00, sha 98a32651ae9c)
  - registry_npm: https://registry.npmjs.org/papaparse (fetched 2026-08-29T08:08:19.170337+00:00, sha 080560653455)
  - site_page: https://www.papaparse.com/faq (fetched 2026-08-29T08:08:19.168135+00:00, sha 2e7927fadc5c)
- Data as of 2026-08-30T08:39:29.467469+00:00.