What is csv-parser?

csv-parser is a JavaScript tool that takes CSV files (the kind you might open in Excel or Google Sheets) and converts them into JSON objects that code can easily work with. Its main selling point is speed: it can chew through roughly 90,000 rows per second, making it a strong choice when you need to process large data files without waiting around. The tool works using a "streaming" approach. Instead of trying to load an entire massive CSV file into memory all at once (which could crash your application), it reads the file in chunks, row by row, and converts each row into a JavaScript object as it goes. You point it at a file, and it hands you back clean, structured data, like turning NAME,AGE / Daffy Duck,24 into { NAME: "Daffy Duck", AGE: "24" }. It also handles the messy edge cases that make CSV files annoying: quoted fields, comments, different newline formats, and even files without header rows. Someone working on a data import feature for a web app would reach for this. For example, if you are building a product that lets users upload a spreadsheet of customer contacts, this tool reads that file and gives you each row as a tidy object you can save to a database. It also includes a command-line tool, so a data analyst could pipe a file through it in a terminal to instantly convert a CSV into JSON format without writing any code. What stands out is how the project balances raw speed with flexibility. Beyond just parsing, it lets you transform data on the fly, you can rename headers, modify values as they are read, skip comment lines, or handle tab-separated files instead of comma-separated ones. The README is straightforward about its requirements (it needs a relatively recent version of Node.js) and even addresses common headaches like files with unusual text encoding or invisible Byte Order Mark characters that can silently break parsing.