react-papaparse is the fastest in-browser CSV (or delimited text) parser for React. It is full of useful features such as CSVReader, CSVDownloader, readString, jsonToCSV, readRemoteFile, ... etc.
react-papaparse is available on npm. It can be installed with the following command:
npm install react-papaparse --save
react-papaparse is available on yarn as well. It can be installed with the following command:
yarn add react-papaparse --save
To learn how to use react-papaparse:
import React, { CSSProperties } from 'react';
import { useCSVReader } from 'react-papaparse';
const styles = {
csvReader: {
display: 'flex',
flexDirection: 'row',
marginBottom: 10,
} as CSSProperties,
browseFile: {
width: '20%',
} as CSSProperties,
acceptedFile: {
border: '1px solid #ccc',
height: 45,
lineHeight: 2.5,
paddingLeft: 10,
width: '80%',
} as CSSProperties,
remove: {
borderRadius: 0,
padding: '0 20px',
} as CSSProperties,
progressBarBackgroundColor: {
backgroundColor: 'red',
} as CSSProperties,
};
export default function CSVReader() {
const { CSVReader } = useCSVReader();
return (
<CSVReader
onUploadAccepted={(results: any) => {
console.log('---------------------------');
console.log(results);
console.log('---------------------------');
}}
>
{({
getRootProps,
acceptedFile,
ProgressBar,
getRemoveFileProps,
}: any) => (
<>
<div style={styles.csvReader}>
<button type='button' {...getRootProps()} style={styles.browseFile}>
Browse file
</button>
<div style={styles.acceptedFile}>
{acceptedFile && acceptedFile.name}
</div>
<button {...getRemoveFileProps()} style={styles.remove}>
Remove
</button>
</div>
<ProgressBar style={styles.progressBarBackgroundColor} />
</>
)}
</CSVReader>
);
}
import React, { useState, CSSProperties } from 'react';
import {
useCSVReader,
lightenDarkenColor,
formatFileSize,
} from 'react-papaparse';
const GREY = '#CCC';
const GREY_LIGHT = 'rgba(255, 255, 255, 0.4)';
const DEFAULT_REMOVE_HOVER_COLOR = '#A01919';
const REMOVE_HOVER_COLOR_LIGHT = lightenDarkenColor(
DEFAULT_REMOVE_HOVER_COLOR,
40
);
const GREY_DIM = '#686868';
const styles = {
zone: {
alignItems: 'center',
border: `2px dashed ${GREY}`,
borderRadius: 20,
display: 'flex',
flexDirection: 'column',
height: '100%',
justifyContent: 'center',
padding: 20,
} as CSSProperties,
file: {
background: 'linear-gradient(to bottom, #EEE, #DDD)',
borderRadius: 20,
display: 'flex',
height: 120,
width: 120,
position: 'relative',
zIndex: 10,
flexDirection: 'column',
justifyContent: 'center',
} as CSSProperties,
info: {
alignItems: 'center',
display: 'flex',
flexDirection: 'column',
paddingLeft: 10,
paddingRight: 10,
} as CSSProperties,
size: {
backgroundColor: GREY_LIGHT,
borderRadius: 3,
marginBottom: '0.5em',
justifyContent: 'center',
display: 'flex',
} as CSSProperties,
name: {
backgroundColor: GREY_LIGHT,
borderRadius: 3,
fontSize: 12,
marginBottom: '0.5em',
} as CSSProperties,
progressBar: {
bottom: 14,
position: 'absolute',
width: '100%',
paddingLeft: 10,
paddingRight: 10,
} as CSSProperties,
zoneHover: {
borderColor: GREY_DIM,
} as CSSProperties,
default: {
borderColor: GREY,
} as CSSProperties,
remove: {
height: 23,
position: 'absolute',
right: 6,
top: 6,
width: 23,
} as CSSProperties,
};
export default function CSVReader() {
const { CSVReader } = useCSVReader();
const [zoneHover, setZoneHover] = useState(false);
const [removeHoverColor, setRemoveHoverColor] = useState(
DEFAULT_REMOVE_HOVER_COLOR
);
return (
<CSVReader
onUploadAccepted={(results: any) => {
console.log('---------------------------');
console.log(results);
console.log('---------------------------');
setZoneHover(false);
}}
onDragOver={(event: DragEvent) => {
event.preventDefault();
setZoneHover(true);
}}
onDragLeave={(event: DragEvent) => {
event.preventDefault();
setZoneHover(false);
}}
>
{({
getRootProps,
acceptedFile,
ProgressBar,
getRemoveFileProps,
Remove,
}: any) => (
<>
<div
{...getRootProps()}
style={Object.assign(
{},
styles.zone,
zoneHover && styles.zoneHover
)}
>
{acceptedFile ? (
<>
<div style={styles.file}>
<div style={styles.info}>
<span style={styles.size}>
{formatFileSize(acceptedFile.size)}
</span>
<span style={styles.name}>{acceptedFile.name}</span>
</div>
<div style={styles.progressBar}>
<ProgressBar />
</div>
<div
{...getRemoveFileProps()}
style={styles.remove}
onMouseOver={(event: Event) => {
event.preventDefault();
setRemoveHoverColor(REMOVE_HOVER_COLOR_LIGHT);
}}
onMouseOut={(event: Event) => {
event.preventDefault();
setRemoveHoverColor(DEFAULT_REMOVE_HOVER_COLOR);
}}
>
<Remove color={removeHoverColor} />
</div>
</div>
</>
) : (
'Drop CSV file here or click to upload'
)}
</div>
</>
)}
</CSVReader>
);
}
import React, { useState, CSSProperties } from 'react';
import {
useCSVReader,
lightenDarkenColor,
formatFileSize,
} from 'react-papaparse';
const GREY = '#CCC';
const GREY_LIGHT = 'rgba(255, 255, 255, 0.4)';
const DEFAULT_REMOVE_HOVER_COLOR = '#A01919';
const REMOVE_HOVER_COLOR_LIGHT = lightenDarkenColor(
DEFAULT_REMOVE_HOVER_COLOR,
40
);
const GREY_DIM = '#686868';
const styles = {
zone: {
alignItems: 'center',
border: `2px dashed ${GREY}`,
borderRadius: 20,
display: 'flex',
flexDirection: 'column',
height: '100%',
justifyContent: 'center',
padding: 20,
} as CSSProperties,
file: {
background: 'linear-gradient(to bottom, #EEE, #DDD)',
borderRadius: 20,
display: 'flex',
height: 120,
width: 120,
position: 'relative',
zIndex: 10,
flexDirection: 'column',
justifyContent: 'center',
} as CSSProperties,
info: {
alignItems: 'center',
display: 'flex',
flexDirection: 'column',
paddingLeft: 10,
paddingRight: 10,
} as CSSProperties,
size: {
backgroundColor: GREY_LIGHT,
borderRadius: 3,
marginBottom: '0.5em',
justifyContent: 'center',
display: 'flex',
} as CSSProperties,
name: {
backgroundColor: GREY_LIGHT,
borderRadius: 3,
fontSize: 12,
marginBottom: '0.5em',
} as CSSProperties,
progressBar: {
bottom: 14,
position: 'absolute',
width: '100%',
paddingLeft: 10,
paddingRight: 10,
} as CSSProperties,
zoneHover: {
borderColor: GREY_DIM,
} as CSSProperties,
default: {
borderColor: GREY,
} as CSSProperties,
remove: {
height: 23,
position: 'absolute',
right: 6,
top: 6,
width: 23,
} as CSSProperties,
};
export default function CSVReader() {
const { CSVReader } = useCSVReader();
const [zoneHover, setZoneHover] = useState(false);
const [removeHoverColor, setRemoveHoverColor] = useState(
DEFAULT_REMOVE_HOVER_COLOR
);
return (
<CSVReader
onUploadAccepted={(results: any) => {
console.log('---------------------------');
console.log(results);
console.log('---------------------------');
setZoneHover(false);
}}
onDragOver={(event: DragEvent) => {
event.preventDefault();
setZoneHover(true);
}}
onDragLeave={(event: DragEvent) => {
event.preventDefault();
setZoneHover(false);
}}
noClick
>
{({
getRootProps,
acceptedFile,
ProgressBar,
getRemoveFileProps,
Remove,
}: any) => (
<>
<div
{...getRootProps()}
style={Object.assign(
{},
styles.zone,
zoneHover && styles.zoneHover
)}
>
{acceptedFile ? (
<>
<div style={styles.file}>
<div style={styles.info}>
<span style={styles.size}>
{formatFileSize(acceptedFile.size)}
</span>
<span style={styles.name}>{acceptedFile.name}</span>
</div>
<div style={styles.progressBar}>
<ProgressBar />
</div>
<div
{...getRemoveFileProps()}
style={styles.remove}
onMouseOver={(event: Event) => {
event.preventDefault();
setRemoveHoverColor(REMOVE_HOVER_COLOR_LIGHT);
}}
onMouseOut={(event: Event) => {
event.preventDefault();
setRemoveHoverColor(DEFAULT_REMOVE_HOVER_COLOR);
}}
>
<Remove color={removeHoverColor} />
</div>
</div>
</>
) : (
'Drop CSV file here to upload'
)}
</div>
</>
)}
</CSVReader>
);
}
import React, { useState, CSSProperties } from 'react';
import {
useCSVReader,
lightenDarkenColor,
formatFileSize,
} from 'react-papaparse';
const GREY = '#CCC';
const GREY_LIGHT = 'rgba(255, 255, 255, 0.4)';
const DEFAULT_REMOVE_HOVER_COLOR = '#A01919';
const REMOVE_HOVER_COLOR_LIGHT = lightenDarkenColor(
DEFAULT_REMOVE_HOVER_COLOR,
40
);
const GREY_DIM = '#686868';
const styles = {
zone: {
alignItems: 'center',
border: `2px dashed ${GREY}`,
borderRadius: 20,
display: 'flex',
flexDirection: 'column',
height: '100%',
justifyContent: 'center',
padding: 20,
} as CSSProperties,
file: {
background: 'linear-gradient(to bottom, #EEE, #DDD)',
borderRadius: 20,
display: 'flex',
height: 120,
width: 120,
position: 'relative',
zIndex: 10,
flexDirection: 'column',
justifyContent: 'center',
} as CSSProperties,
info: {
alignItems: 'center',
display: 'flex',
flexDirection: 'column',
paddingLeft: 10,
paddingRight: 10,
} as CSSProperties,
size: {
backgroundColor: GREY_LIGHT,
borderRadius: 3,
marginBottom: '0.5em',
justifyContent: 'center',
display: 'flex',
} as CSSProperties,
name: {
backgroundColor: GREY_LIGHT,
borderRadius: 3,
fontSize: 12,
marginBottom: '0.5em',
} as CSSProperties,
progressBar: {
bottom: 14,
position: 'absolute',
width: '100%',
paddingLeft: 10,
paddingRight: 10,
} as CSSProperties,
zoneHover: {
borderColor: GREY_DIM,
} as CSSProperties,
default: {
borderColor: GREY,
} as CSSProperties,
remove: {
height: 23,
position: 'absolute',
right: 6,
top: 6,
width: 23,
} as CSSProperties,
};
export default function CSVReader() {
const { CSVReader } = useCSVReader();
const [zoneHover, setZoneHover] = useState(false);
const [removeHoverColor, setRemoveHoverColor] = useState(
DEFAULT_REMOVE_HOVER_COLOR
);
return (
<CSVReader
onUploadAccepted={(results: any) => {
console.log('---------------------------');
console.log(results);
console.log('---------------------------');
setZoneHover(false);
}}
onDragOver={(event: DragEvent) => {
event.preventDefault();
setZoneHover(true);
}}
onDragLeave={(event: DragEvent) => {
event.preventDefault();
setZoneHover(false);
}}
noDrag
>
{({
getRootProps,
acceptedFile,
ProgressBar,
getRemoveFileProps,
Remove,
}: any) => (
<>
<div
{...getRootProps()}
style={Object.assign(
{},
styles.zone,
zoneHover && styles.zoneHover
)}
>
{acceptedFile ? (
<>
<div style={styles.file}>
<div style={styles.info}>
<span style={styles.size}>
{formatFileSize(acceptedFile.size)}
</span>
<span style={styles.name}>{acceptedFile.name}</span>
</div>
<div style={styles.progressBar}>
<ProgressBar />
</div>
<div
{...getRemoveFileProps()}
style={styles.remove}
onMouseOver={(event: Event) => {
event.preventDefault();
setRemoveHoverColor(REMOVE_HOVER_COLOR_LIGHT);
}}
onMouseOut={(event: Event) => {
event.preventDefault();
setRemoveHoverColor(DEFAULT_REMOVE_HOVER_COLOR);
}}
>
<Remove color={removeHoverColor} />
</div>
</div>
</>
) : (
'Click to upload'
)}
</div>
</>
)}
</CSVReader>
);
}
Just pass in the js object with an optional configuration ( setting delimiter / separator ).
Note: If you want to open your CSV files in Excel, you might want to set bom={true}
or bom
, default is false
. This option adds the so called BOM byte '\ufeff'
to the beginning of your CSV files and tells Excel that the encoding is UTF8.
import React from 'react';
import { useCSVDownloader } from 'react-papaparse';
export default function CSVDownloader() {
const { CSVDownloader, Type } = useCSVDownloader();
return (
<CSVDownloader
type={Type.Button}
filename={'filename'}
bom={true}
config={{
delimiter: ';',
}}
data={[
{
'Column 1': '1-1',
'Column 2': '1-2',
'Column 3': '1-3',
'Column 4': '1-4',
},
{
'Column 1': '2-1',
'Column 2': '2-2',
'Column 3': '2-3',
'Column 4': '2-4',
},
{
'Column 1': '3-1',
'Column 2': '3-2',
'Column 3': '3-3',
'Column 4': '3-4',
},
{
'Column 1': 4,
'Column 2': 5,
'Column 3': 6,
'Column 4': 7,
},
]}
>
Download
</CSVDownloader>
);
}
import React from 'react';
import { useCSVDownloader } from 'react-papaparse';
export default function CSVDownloader() {
const { CSVDownloader, Type } = useCSVDownloader();
return (
<CSVDownloader
type={Type.Link}
filename={'filename'}
bom={true}
data={`Column 1,Column 2,Column 3,Column 4
1-1,1-2,1-3,1-4
#2-1,เคฎเฅเคเฅเคถ,แแแแปแ,2-4
3-1,3-2,แขแแแ,3-4
4,5,6,7`}
>
Download
</CSVDownloader>
);
}
data={}
can be a synchronous or asynchronous function that returns a data object.
import React from 'react';
import { useCSVDownloader } from 'react-papaparse';
export default function CSVDownloader() {
const { CSVDownloader } = useCSVDownloader();
return (
<CSVDownloader
filename={'filename'}
data={() => {
return [
{
"Column 1": "1-1",
"Column 2": "1-2",
"Column 3": "1-3",
"Column 4": "1-4",
}
]}
}
>
Download
</CSVDownloader>
);
}
import React from 'react';
import { usePapaParse } from 'react-papaparse';
export default function ReadString() {
const { readString } = usePapaParse();
const handleReadString = () => {
const csvString = `Column 1,Column 2,Column 3,Column 4
1-1,1-2,1-3,1-4
2-1,2-2,2-3,2-4
3-1,3-2,3-3,3-4
4,5,6,7`;
readString(csvString, {
worker: true,
complete: (results) => {
console.log('---------------------------');
console.log(results);
console.log('---------------------------');
},
});
};
return <button onClick={() => handleReadString()}>readString</button>;
}
import React from 'react';
import { usePapaParse } from 'react-papaparse';
export default function ReadRemoteFile() {
const { readRemoteFile } = usePapaParse();
const handleReadRemoteFile = () => {
readRemoteFile(url, {
complete: (results) => {
console.log('---------------------------');
console.log('Results:', results);
console.log('---------------------------');
},
});
};
return <button onClick={() => handleReadRemoteFile()}>readRemoteFile</button>;
}
import React from 'react';
import { usePapaParse } from 'react-papaparse';
export default function JsonToCSV() {
const { jsonToCSV } = usePapaParse();
const handleJsonToCSV = () => {
const jsonData = [
{
"Column 1": "1-1",
"Column 2": "1-2",
"Column 3": "1-3",
"Column 4": "1-4"
},
{
"Column 1": "2-1",
"Column 2": "2-2",
"Column 3": "2-3",
"Column 4": "2-4"
},
{
"Column 1": "3-1",
"Column 2": "3-2",
"Column 3": "3-3",
"Column 4": "3-4"
},
{
"Column 1": 4,
"Column 2": 5,
"Column 3": 6,
"Column 4": 7
}
];
const results = jsonToCSV(jsonData);
console.log('---------------------------');
console.log('Results:', results);
console.log('---------------------------');
};
return <button onClick={() => handleJsonToCSV()}>jsonToCSV</button>;
}
If you tell react-papaparse there is a header row, each row will be organized by field name instead of index.
import { usePapaParse } from 'react-papaparse';
const { readString } = usePapaParse();
readString(csvString, {
header: true,
worker: true,
complete: (results) => {
console.log('---------------------------');
console.log(results);
console.log('---------------------------');
},
});
That's what streaming is for. Specify a step callback to receive the results row-by-row. This way, you won't load the whole file into memory and crash the browser.
import { usePapaParse } from 'react-papaparse';
const { readRemoteFile } = usePapaParse();
readRemoteFile(url, {
step: (row) => {
console.log('Row:', row.data);
},
complete: () => {
console.log('All done!');
}
});
Latest version 4.4.0 (2023-10-14):
Version 4.3.0 (2023-10-10):
Version 4.2.2 (2023-10-09):
Version 4.2.0 (2023-10-07):
Version 4.1.0 (2022-08-07):
Version 4.0.4 (2022-08-06):
Version 4.0.2 (2022-01-26):
Version 4.0.1 (2022-01-21):
Version 4.0.0 (2022-01-18):
Details changes for each release are documented in the CHANGELOG.md.
If you think any of the react-papaparse
can be improved, please do open a PR with any updates and submit any issues. Also, I will continue to improve this, so you might want to watch/star this repository to revisit.
We'd love to have your helping hand on contributions to react-papaparse
by forking and sending a pull request!
Your contributions are heartily โก welcome, recognized and appreciated. (โฟโ โฟโ )
How to contribute:
You maybe interested.