# vsch/flexmark-java

CommonMark/Markdown Java parser with source level AST. CommonMark 0.28, emulation of: pegdown, kramdown, markdown.pl, MultiMarkdown. With HTML to MD, MD to PDF, MD to DOCX  conversion modules.

Repository: https://github.com/vsch/flexmark-java
Canonical: https://ross.abutalabs.com/products/flexmark-java
Language: Java
License: BSD-2-Clause
License Family: permissive
Topics: commonmark, pegdown, java, markdown-parser, markdown-processor, markdown-conversion, markdown-flavors, markdown, markdown-to-html, html-to-markdown, markdown-to-pdf
Last push: 2025-04-16T19:07:12+00:00

## Health v2 (maintenance only)
Score: 39/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 16, release rhythm 35, longevity 100
- inputs: {"age_days": 3875, "days_push": 504, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2640, forks 302 (observed 2026-08-28T04:07:06.448256+00:00)

## What it is
flexmark-java is a fast, extensible Java parser for CommonMark/Markdown that produces a source-position-aware AST and renders HTML, with emulation modes for pegdown, kramdown, markdown.pl, and MultiMarkdown. It also ships conversion modules for HTML to Markdown, Markdown to PDF, and Markdown to DOCX.

## Use cases
- parse markdown into an AST in Java
- convert markdown to HTML
- convert HTML back to markdown
- render markdown documents to PDF
- convert markdown to DOCX
- replace pegdown with a faster markdown parser
- emulate kramdown or MultiMarkdown rendering in Java

## When to choose
- you need a high-performance, CommonMark-compliant Markdown parser on the JVM
- you need detailed source positions in the AST for editor tooling or syntax highlighting
- you need to mimic the output of other Markdown processors like pegdown or kramdown
- you need Markdown conversion to HTML, PDF, or DOCX in a Java application

## When to avoid
- you need a Markdown parser in a non-JVM language
- you only need simple Markdown rendering and a lighter-weight library suffices
- you need strict compliance with a newer CommonMark spec than 0.28

## Facets
- artifact type: library
- maturity: stable
- function: parser, markdown, templating, pdf, serialization
- domain: parsers, documentation, developer-tools, text-editors
- platform: jvm, cross-platform
- tags: commonmark, markdown-parser, markdown-to-html, html-to-markdown, markdown-to-pdf, markdown-to-docx, pegdown-emulation, ast, extensible

## Member repositories
- vsch/flexmark-java (main) score 39

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:06.448256+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:19:08.657224+00:00, confidence not recorded.
  - readme: https://github.com/vsch/flexmark-java (fetched 2026-08-28T04:07:06.448256+00:00, sha 646ce2e97060)
- Data as of 2026-08-30T08:39:29.467469+00:00.