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.

Tablecruncher / tablecruncher

A lightweight, powerful CSV editor for macOS, Windows and Linux — with built-in JavaScript macros.

danielaparker / jsoncons

A C++, header-only library for constructing JSON and JSON-like data formats, with JSON Pointer, JSON Patch, JSON Schema, JSONPath, JMESPath, CSV, MessagePack, CBOR, BSON, UBJSON, toon-format

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.

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.