mdgate converters

FB2 to Markdown in your browser.

Convert FB2 files to GitHub-Flavored Markdown directly in your browser.

Your FB2 stays on your device. No upload. No account.

Starting local converter

Use FB2 to Markdown in your app

$ npm install @mdgate/fb2 

import { toMarkdown } from '@mdgate/fb2';

const markdown = await toMarkdown(bytes);

Pure TypeScript, Node.js, Cloudflare Workers, Edge, Browser, No Python, No native addons, No WASM, Zero third-party runtime dependencies

How FB2 to Markdown works

  1. FB2
  2. FictionBook XML parsing
  3. title · body · headings
  4. GitHub-Flavored Markdown

Built for JavaScript runtimes

Node.js

Read local files, uploads, S3/R2 objects, and other byte sources.

Cloudflare Workers

Parse FB2 files directly inside Workers without an ebook reader or native binary.

Browser

Convert FB2 locally without uploading it to a server.

Edge

Run the same TypeScript converter in compatible Edge runtimes.

What @mdgate/fb2 extracts

  • Title and body sections
  • Headings and paragraphs
  • Emphasis
  • Nested ZIP (.fb2.zip)

Why @mdgate/fb2

Runs where your JavaScript runs

No separate processing service. The converter is TypeScript you can call from Node.js, Cloudflare Workers, Edge runtimes, and browsers.

Local conversion

FB2 files can stay inside your application or browser.

Content detection

Recognizes FB2 files from their contents, not only the filename.

Deterministic parsing

The same FB2 file produces repeatable Markdown without model inference.

Small runtime surface

No Python. No native addons. No WASM. No third-party runtime dependencies.

FB2 for AI agents

Turn FB2 files into content your agent can actually work with.

  1. FB2
  2. Markdown
    • grep
    • search
    • chunk
    • index
    • cache
    • cite
    • reason

Need more than FB2?

One format

@mdgate/fb2

Your own set

@mdgate/core
+ @mdgate/fb2
+ @mdgate/pdf
+ @mdgate/docx

Broad file support

@mdgate/converters

FAQ

Can I convert FB2 to Markdown without uploading it?

Yes. FB2 files can be converted locally in the browser.

Does FB2 to Markdown work in Cloudflare Workers?

Yes. @mdgate/fb2 runs directly in Cloudflare Workers.

Does it require Python?

No.

Does it require native addons or WASM?

No.

What does it output?

GitHub-Flavored Markdown.

Can I install only the FB2 converter?

Yes. Install @mdgate/fb2 instead of the complete converter set.