mholt / PapaParse

Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input

productdevbook / hucre

Zero-dependency spreadsheet engine. Read & write XLSX, CSV, ODS. Pure TypeScript, works everywhere.

C2FO / fast-csv

CSV parser and formatter for node

tilo / smarter_csv

Fastest end-to-end CSV ingestion for Ruby (with C acceleration). SmarterCSV auto-detects formats, applies smart defaults, and returns Rails-ready hashes for seamless use with ActiveRecord, Sidekiq, parallel jobs, and S3 pipelines — even for messy user-uploaded real-world data.

nietras / Sep

World's Fastest .NET CSV Parser. Modern, minimal, fast, zero allocation, reading and writing of separated values (`csv`, `tsv` etc.). Cross-platform, trimmable and AOT/NativeAOT compatible with blazing fast SIMD vectorized parsing.

vincentlaucsb / csv-parser

A modern C++ CSV parser and serializer that doesn't make you choose between ease of use or performance.

paillave / Etl.Net

Mass processing data with a complete ETL for .net developers

osiegmar / FastCSV

Fast, lightweight, and RFC 4180 compliant CSV library for Java. Zero dependencies, ~90 KiB. Trusted by Apache NiFi, JUnit, and Neo4j.

tidyverse / vroom

Fast reading of delimited files

p-ranav / csv2

Fast CSV parser and writer for Modern C++

rhpaiva / cssv

CSSV is CSV data with a CSS stylesheet at the top of the same file. One plain-text file renders as a styled HTML table in any browser.

tooladda-online / csv-to-json-converter

CSV to JSON Converter — Paste, upload, drag & drop, or import CSV from a URL and get clean, valid JSON instantly — with spreadsheet preview, live validation, tree & raw views, column mapping, and batch conversion. Free on ToolAdda.online.