transactions-parser

transactions-parser is a Node.js library and CLI tool that automatically detects and parses a variety of bank statement text files into structured JSON transaction data.

Installation

Install in your project:

npm install transactions-parser

Or run without installing using npx:

npx transactions-parser file1.txt [file2.txt ...]

Usage

Command Line

Parse one or more bank statement .txt files and print JSON to the terminal:

npx transactions-parser file1.txt file2.txt file3.txt

To parse all .txt files in a folder:

• Linux/macOS:

  npx transactions-parser *.txt

• Windows:

  Use Git Bash, WSL, or specify files explicitly as above:

Programmatic (Node.js)

Use within your Node.js code:

import { parseFile } from 'transactions-parser';
import fs from 'fs';

const content = fs.readFileSync('file1.txt', 'utf8');
const transactions = parseFile(content, 'file1.txt');

console.log(JSON.stringify(transactions, null, 2));

Input and Output

• Input: Plain text bank statement files (not PDFs or images).

• Output: Array of JSON transaction objects:

  | Field | Type | Description | |-------------|--------|------------------------------------| | date | String | Transaction date (DD/MM/YYYY) | | narration | String | Cleaned transaction description | | amount | Number | Positive transaction amount | | type | String | "Debit" or "Credit" |

Example

[
  {
    "date": "01/07/2025",
    "narration": "EXAMPLE VENDOR PAYMENT",
    "amount": 2500,
    "type": "Debit"
  },
  {
    "date": "02/07/2025",
    "narration": "SALARY CREDIT",
    "amount": 80000,
    "type": "Credit"
  }
]

Notes

• The parser auto-detects the bank statement format for each file.
• Unsupported or unparsable files will output an empty array for that file.

transactions-parser makes it easy to extract clean, structured transaction data from your bank statement text files.