CC2P: CSV to Parquet converter

CC2P (Convert CSV To Parquet) is a command-line tool written in Rust that converts CSV files to Apache Parquet. Parquet is a columnar format with good compression, which makes it a nice fit for big data work.

Why use it

• Fast: Rust plus multi-threading keeps conversions quick
• Light on memory: It doesn’t load the whole file into RAM
• Flexible: Handles different delimiters and header options
• Schema inference: Figures out column types from the data
• Batch processing: Convert many CSV files in one command
• Interactive mode: Pick which columns to export from a TUI

Installation

From Cargo (Recommended)

If you have Rust installed, you can install CC2P directly from crates.io:

cargo install cc2p

From GitHub Releases

You can download pre-built binaries from the GitHub Releases page.

From Source

git clone https://github.com/rayyildiz/cc2p.git
cd cc2p
cargo build --release

Usage

Basic usage:

cc2p [OPTIONS] [PATH]

Where PATH is the path to a CSV file or a glob pattern (default: *.csv).

Examples

Convert a single CSV file:

cc2p data.csv

Convert all CSV files in the current directory:

cc2p

Convert CSV files with semicolon delimiter:

cc2p --delimiter ";" *.csv

Convert CSV files without headers:

cc2p --no-header data_files/*.csv

Use 4 worker threads for faster processing:

cc2p --worker 4 large_data.csv

Options

• -d, —delimiter : Delimiter character used in CSV files (default: ,)
• -n, —no-header: Whether to include the header in the CSV search column (default: false)
• -w, —worker: Number of worker threads to use (default: 1)
• -s, —sampling: Number of rows to sample for inferring the schema (default: 2048)
• -i, —interactive: Show an interactive UI to browse files and select columns

Interactive mode

CC2P has a terminal UI (TUI) for browsing CSV files, checking inferred schemas, and choosing which columns to export.

cc2p -i

Key	Action
↑/↓	Navigate through files or columns
Tab	Switch between File List and Column List panels
Space	Select/Unselect the highlighted column
Enter	Export selected columns to Parquet
Q	Quit the application

Platform Notes

macOS

Apple signing/notarization is not complete yet. After downloading, run:

xattr -c cc2p

Linux

Install via Snap:

sudo snap install cc2p

Technical Requirements

• Rust: 1.88.0+ (Edition 2024)
• Minimum Memory: Depends on CSV file size

License

MIT. See LICENSE.