Parsers and serialisers

12-month change compares the average of the last 4 weeks of downloads with the first 4 weeks of the 52-week series. Gzip size is for the whole package, as measured by Bundlephobia. "-" means the value has not been fetched.

• lucene-queryparserLucene Query Parser for Javascript created using PEG.js
• pdf-parser.jsHand-written, dependency-minimal PDF codec: parses arbitrary real-world PDFs and generates new ones, built on its own codec-owned LayoutDocument item model and Zod 4 codecs.
• booksEasily create documents using web technologies
• apicache-plusEffortless api response caching for Express/Node using plain-english durations
• @gkz/ast-typesEsprima-compatible implementation of the Mozilla JS Parser API
• @stafyniaksacha/facturxFactur-X and Order-X generation library for European e-invoicing standard
• uql-ormThe JSON-native TypeScript ORM for Bun, Browsers, Edge, Deno, Node, Workers. Supports PostgreSQL, PGlite, MySQL, MariaDB, SQLite, CockroachDB, SQL Server, Turso, Neon, Cloudflare D1 and MongoDB. Queries are plain JSON, typed to the leaf.
• license-expressionsPure-JavaScript (TypeScript) parser for SPDX expressions
• @mdx-js/preactPreact context for MDX
• domparser-linux-arm64-muslA super fast html parser and manipulator written in rust.
• @pyramation/json-schema-ref-parserParse, Resolve, and Dereference JSON Schema $ref pointers
• daffDiff and patch tables
• express-route-parserAn Express plugin that can list the path and route endpoints of an Express app.
• next-build-parserParse the output of next build into machine readable JSON.
• parser-factoryHelps you construct a custom string parser, for times when you need something more procedural than regex.
• @anttiviljami/json-schema-ref-parserParse, Resolve, and Dereference JSON Schema $ref pointers
• @remnic/capture-screenDesktop screen-activity capture daemon for Remnic — local spool, loopback HTTP API, and replay ingestion for the activity source `screen` (à-la-carte)
• prettydiffA language aware diff tool.
• @remnic/capture-audioDesktop audio capture daemon for Remnic — local spool, loopback HTTP API, and replay ingestion for the wearable source `desktop` (à-la-carte)
• config.iniyour .ini files parser with some extras
• google-search-results-nodejsGoogle Search Node JS API via SerpApi.com
• bpe-liteOffline BPE tokenizer for OpenAI, Anthropic, and Gemini — zero dependencies
• parse-mdSeparate markdown file's metadata from its content
• reserved-email-addresses-listList of 1250+ generic, admin, mailer-daemon, and no-reply usernames reserved for security concerns. Made for Forward Email <https//forwardemail.net>.
• @plannotator/atomic-editorCodeMirror 6 markdown editor with Obsidian-style inline live preview. Plannotator fork of atomic-editor (adds YAML frontmatter parsing).
• parse-errParse errors in the Browser and Node. Made for Cabin.
• char-infoUnicode character information library.
• vizeVize - High-performance Vue.js toolchain in Rust
• @tree-sitter-grammars/tree-sitter-xmlXML & DTD grammars for tree-sitter
• protobuf-schemaNo nonsense protobuf schema parser written in Javascript
• remark-usageremark plugin to add a usage example to your readme
• gulp-ng-configAngularJS configuration generator for a module of constants
• docmaA powerful dev-tool to easily generate beautiful HTML documentation from Javascript (JSDoc), Markdown and HTML files.
• @mdpdf/mdpdf-darwin-arm64Convert Markdown to PDF using a self-contained Rust binary
• sequelize-search-builderMinimalist library for parsing search request to sequelize query
• @ch4nn0n/email-forward-parserParses forwarded emails and extract content
• @dualmark/coreFramework-agnostic primitives for AEO infrastructure: content negotiation, AI-bot detection, markdown response, token estimation, composition helpers.
• remark-telegraphremark plugin to translate markdown into Telegra.ph Nodes
• jsonld-extractA damn simple tool to extract json-ld metadata from webpage using jquery like api (jQuery, Cheerio, CashDOM, ...).
• domparser-darwin-x64A super fast html parser and manipulator written in rust.
• domparser-win32-arm64-msvcA super fast html parser and manipulator written in rust.
• @mdx-js/node-loaderNode.js loader for MDX
• indicative-parserSchema parser for Indicative
• @reddb-io/toonTOON v4.1 encoder and decoder, plus TOONL v0.2 append-only streaming. Dependency-free ESM, conformant against the official spec corpus.
• svelte-inspect-valueSvelte value inspector component
• parse-ingredientRecipe ingredient parser with support for mixed numbers and vulgar fractions
• pg-parse-floatrestore parseFloat behavior to node-postgres (pg) - can be used as a reference for implementing other type parsing addons
• @mdpdf/mdpdf-linux-arm64-gnuConvert Markdown to PDF using a self-contained Rust binary
• knapA flexible template engine for creating Markdown.
• @sveltepress/viteSveltepress plugin for vite

• htmlparser2 vs cssom
• css-tree vs lightningcss
• esprima vs meriyah
• markdown-it vs markdown-exit
• turndown vs showdown
• @mdxeditor/editor vs @uiw/react-md-editor
• markdownlint-cli2 vs markdownlint-cli
• @mdx-js/react vs @mdxeditor/editor
• @uiw/react-md-editor vs markdown-exit
• @uiw/react-md-editor vs easymde
• @mdxeditor/editor vs easymde
• react-markdown vs @mdx-js/react
• @mdx-js/react vs markdown-to-jsx
• defuddle vs md-to-pdf
• pino vs roarr
• cheerio vs html-react-parser
• htmlparser2 vs html-react-parser
• react-markdown vs markdown-to-jsx
• @mdxeditor/editor vs react-native-enriched-markdown
• @microsoft/tsdoc vs jsdoc-to-markdown
• markdown-exit vs snarkdown
• doctoc vs jsdoc-to-markdown
• react-markdown vs @mdxeditor/editor
• snarkdown vs @tryfabric/martian
• turndown vs snarkdown
• conf vs convict
• markdown-it vs turndown
• xlsx vs fast-formula-parser
• json-schema-to-ts vs prisma-json-types-generator
• @microsoft/tsdoc vs vue-docgen-api