{"id":15583393,"url":"https://github.com/osiegmar/fastcsv","last_synced_at":"2026-04-04T10:19:41.959Z","repository":{"id":18043027,"uuid":"21088826","full_name":"osiegmar/FastCSV","owner":"osiegmar","description":"CSV library for Java that is fast, RFC-compliant and dependency-free. ⭐️ Star to support our 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align=\"center\"\u003e\n  \u003cimg src=\"fastcsv.svg\" width=\"400\" height=\"50\" alt=\"FastCSV\"\u003e\n\u003c/p\u003e\n\n\u003cp align=\"center\"\u003e\n  \u003cstrong\u003eFastCSV\u003c/strong\u003e: fast, lightweight, and easy to use — the production-proven CSV library for Java.\u003cbr/\u003e\n  It’s the most-starred CSV library for Java and trusted by leading open-source projects such as Apache NiFi, JUnit and Neo4j.\n\u003c/p\u003e\n\n\u003cp align=\"center\"\u003e\n  \u003ca href=\"https://javadoc.io/doc/de.siegmar/fastcsv\"\u003e\u003cimg src=\"https://javadoc.io/badge2/de.siegmar/fastcsv/javadoc.svg\" alt=\"javadoc\"\u003e\u003c/a\u003e\n  \u003ca href=\"https://central.sonatype.com/artifact/de.siegmar/fastcsv\"\u003e\u003cimg src=\"https://img.shields.io/maven-central/v/de.siegmar/fastcsv\" alt=\"Maven Central\"\u003e\u003c/a\u003e\n  \u003ca href=\"https://github.com/akullpp/awesome-java\"\u003e\u003cimg src=\"https://awesome.re/mentioned-badge.svg\" alt=\"Mentioned in Awesome Java\"\u003e\u003c/a\u003e\n\u003c/p\u003e\n\n\u003cp align=\"center\"\u003e\n  \u003ca href=\"https://github.com/osiegmar/FastCSV/actions/workflows/build.yml\"\u003e\u003cimg src=\"https://github.com/osiegmar/FastCSV/actions/workflows/build.yml/badge.svg?branch=main\" alt=\"build\"\u003e\u003c/a\u003e\n  \u003ca href=\"https://app.codacy.com/gh/osiegmar/FastCSV/dashboard?utm_source=gh\u0026utm_medium=referral\u0026utm_content=\u0026utm_campaign=Badge_grade\"\u003e\u003cimg src=\"https://app.codacy.com/project/badge/Grade/7270301676d6463bad9dd1fe23429942\" alt=\"Codacy Badge\"\u003e\u003c/a\u003e\n  \u003ca href=\"https://codecov.io/gh/osiegmar/FastCSV\"\u003e\u003cimg src=\"https://codecov.io/gh/osiegmar/FastCSV/branch/main/graph/badge.svg?token=WIWkv7HUyk\" alt=\"codecov\"\u003e\u003c/a\u003e\n  \u003ca href=\"https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened\u0026can=1\u0026q=proj:fastcsv\"\u003e\u003cimg src=\"https://oss-fuzz-build-logs.storage.googleapis.com/badges/fastcsv.svg\" alt=\"oss-fuzz\"\u003e\u003c/a\u003e\n  \u003ca href=\"https://www.bestpractices.dev/projects/9141\"\u003e\u003cimg src=\"https://www.bestpractices.dev/projects/9141/badge\" alt=\"OpenSSF\"\u003e\u003c/a\u003e\n\u003c/p\u003e\n\n## Features\n\n_Here are the top reasons to choose FastCSV — see [fastcsv.org](https://fastcsv.org) for the full feature list._\n\n- **Fast CSV processing** — optimized for high-speed reading and writing\n- **Tiny footprint** — only ~90 KiB, with zero runtime dependencies\n- **Developer-friendly API** — clean, intuitive, and easy to integrate\n- **Well-documented** — Quickstart guides and complete Javadoc\n- **High test coverage** — including mutation testing for reliability\n- **RFC 4180 compliant** — handles edge cases correctly\n- **Robust \u0026 maintainable** — uses SpotBugs, PMD, Error Prone, NullAway, and Checkstyle to ensure code quality; never returns null unexpectedly\n- **Secure** — fuzz-tested via OSS-Fuzz and following OpenSSF best practices\n- **Production-proven** — trusted by open-source projects like JUnit\n- **Java 17+, Android 34+** compatible — including GraalVM Native Image and OSGi\n\n## Performance\n\n![Benchmark](docs/src/assets/benchmark.png \"Benchmark\")\nBased on the [Java CSV library benchmark suite](https://github.com/osiegmar/JavaCsvBenchmarkSuite).\n\n## Quick Start\n\n### Writing CSV\n\n```java\ntry (CsvWriter csv = CsvWriter.builder().build(Path.of(\"output.csv\"))) {\n    csv\n        .writeRecord(\"header 1\", \"header 2\")\n        .writeRecord(\"value 1\", \"value 2\");\n}\n```\n\n### Reading CSV\n\n```java\ntry (CsvReader\u003cCsvRecord\u003e csv = CsvReader.builder().ofCsvRecord(Path.of(\"input.csv\"))) {\n    csv.forEach(IO::println);\n}\n```\n\n---\n\nFor more examples and detailed documentation, visit [fastcsv.org](https://fastcsv.org).\nIf you find FastCSV useful, consider leaving a [star](https://github.com/osiegmar/FastCSV)!\n\n## License\n\n[MIT](LICENSE)\n","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fosiegmar%2Ffastcsv","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fosiegmar%2Ffastcsv","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fosiegmar%2Ffastcsv/lists"}