Papa Parse
A JavaScript library that parses and creates CSV files in browsers and Node.js.
- Stars
- 13.6k
- Forks
- 1.2k
- Licence
- MIT
- Language
- JavaScript
- Last update
- 10 days ago
- Type
- Library
What it is
Papa Parse reads comma-separated (CSV) and other delimited text and turns it into JavaScript data that a program can work with. It can also go the other way, converting JSON back into CSV. It is designed to run in a web browser and can also be used in Node.js.
- Parse a CSV file selected by a user in the browser
- Stream a large CSV file loaded over HTTP in chunks
- Convert a JSON array into a CSV string with Papa.unparse
- Auto-detect the delimiter and convert numbers and booleans while parsing
Great for
- JavaScript developers who need to import CSV files in a web page
- Projects that load large CSV files and need streaming rather than reading everything at once
- Apps that want parsing to run in a worker thread so the page stays responsive
- Developers who want a library with no dependencies
Not ideal for
- People who only need to view or edit a spreadsheet, since this is a code library with no user interface
- Projects that do not use JavaScript, because the library is written for it
- Users who need a finished command-line tool; the README describes only the library API
How to get it
- 1
Install with a package manager
You'll need: Node.js or npm, if installing via npm
Install from npm
npm install papaparse - 2
Run it
- Install the package with npm install papaparse
- Import it in your code with import Papa from 'papaparse';
- Call Papa.parse(file, config) with a file or string and a config object
- Use Papa.unparse(data) to convert data back into CSV
- 3
Get the most out of it
- Use the streaming options for large files instead of loading everything into memory
- Enable worker threads in the browser to keep the page responsive during parsing
- Use the header row option and the auto-detect delimiter option for varied input
- Use the number and boolean conversion option to get typed values
- Check the online documentation at papaparse.com/docs for the full list of config options
Downloads
Strengths
- The README says it follows RFC 4180 and handles line breaks and quotes correctly
- Has no dependencies, according to the README
- Supports streaming, worker threads, and pause, resume, and abort
Trade-offs
- Some options, such as worker and download, are unavailable in Node.js, per the README
- The README is truncated, so details beyond the listed features are not covered here
- Usage is code-level; a non-programmer will need a developer to integrate it
How it compares
| Project | Stars | Type | Level | Updated | Best for |
|---|---|---|---|---|---|
| PapaParse (this) | 13.6k | Library | intermediate | 10 days ago | JavaScript developers who need to import CSV files in a web page |
| exceljs | 15.5k | Library | intermediate | 1.8 years ago | Node.js developers who need to generate Excel reports from application data |
| Laravel-Excel | 12.7k | Library | intermediate | 14 days ago | Laravel developers who need to export database query results to Excel or CSV |
| yq | 16.2k | CLI | beginner | 8 days ago | Developers who regularly edit YAML config files in scripts or CI pipelines |
Stats synced from GitHub. The assessment above was drafted with AI from the project's README on 2026-10-29 and may miss recent changes — check the README before relying on a command. MIT licence: free to use, modify and distribute, including commercially, as long as you keep the copyright notice.