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Parser repositories on GitHub: 12 ranked by stars

12 public repositories tagged Parser are on GitHub, with 51,528 stars between them; 5 had a push in the last 30 days. Most are written in Rust (3), JavaScript (2), C++ (2). The most starred: tree-sitter/tree-sitter (27,156), mangiucugna/json_repair (5,118), adaltas/node-csv (4,287).

SpecStream is the live web data engine for teams and agents. It reads open-source repositories on GitHub and keeps what it reads, and this page groups that reading by topic. Ask for the repositories you track by topic, language, license or activity, and new ones and changes arrive in your sheet, CRM, Slack or agent.

Every repository, most starred first

RepositoryWhat it isLanguageStarsForksLicenseLast pushRead
tree-sitter/tree-sitterAn incremental parsing system for programming toolsRust27,1562,956MITOct 11Oct 11
mangiucugna/json_repairRepair malformed JSON from LLMs, APIs, logs, and user input in Python.Python5,118221MITOct 9Oct 11
adaltas/node-csvFull featured CSV parser with simple api and tested against large datasets.JavaScript4,287301MITSep 21Sep 21
ashvardanian/StringZillaUp to 100x faster strings for C, C++, CUDA, Python, Rust, Swift, JS, & Go, leveraging NEON, AVX2, AVX-512, SVE, GPGPU, & SWAR to accelerate search, hashing, sorting, edit…C3,570142Apache-2.0Oct 8Oct 11
pulldown-cmark/pulldown-cmarkAn efficient, reliable parser for CommonMark, a standard dialect of MarkdownRust2,737314MITOct 9Oct 11
MadAppGang/dingoA meta-language for Go that adds Result types, error propagation (?), and pattern matching while maintaining 100% Go ecosystem compatibilityGo1,91340Sep 10Oct 11
ada-url/adaWHATWG-compliant and fast URL parser written in modern C++, part of Internet Archive, Node.js, Clickhouse, Redpanda, Kong, Telegram, Adguard, Datadog and Cloudflare Workers.C++1,882147Apache-2.0Oct 10Oct 11
run-llama/semtoolsSemantic search and document parsing tools for the command lineRust1,874144MITMar 11Oct 11
vincentlaucsb/csv-parserA modern C++ CSV parser and serializer that doesn't make you choose between ease of use or performance.C++1,128206MITSep 20Sep 21
swiftcsv/SwiftCSVCSV parser for SwiftSwift1,090194MITDec 16, 2025Sep 21
beatrichartz/csvCSV Decoding and Encoding for ElixirElixir51594MITJan 2, 2025Sep 21
iuccio/csvToJsonConvert CSV file to JSONJavaScript25847MITSep 19Sep 21

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Read from GitHub by SpecStream between September 21, 2026 and October 11, 2026; each row shows the day its repository was read. Stars and pushes change every day, and the GitHub page is the current one. Forks and archived repositories are left out.