mdgate converters

XLSM to Markdown in your browser.

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

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

Starting local converter

Use XLSM to Markdown in your app

$ npm install @mdgate/xlsx 

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

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 XLSM to Markdown works

  1. XLSM
  2. workbook parsing
  3. sheets · cells · tables
  4. GitHub-Flavored Markdown

Built for JavaScript runtimes

Node.js

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

Cloudflare Workers

Parse Excel workbooks directly inside Workers without Excel or a native binary.

Browser

Convert XLSM locally without uploading it to a server.

Edge

Run the same TypeScript converter in compatible Edge runtimes.

What @mdgate/xlsx extracts

  • One Markdown section per sheet
  • GitHub-Flavored Markdown tables
  • Merged cells
  • Header-row detection
  • Number formats (dates, percents, currency-style text)
  • Shared strings and typed cell values
  • Encrypted workbook detection

Why @mdgate/xlsx

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

XLSM files can stay inside your application or browser.

Content detection

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

Deterministic parsing

The same XLSM file produces repeatable Markdown without model inference.

Small runtime surface

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

XLSM for AI agents

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

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

Need more than XLSM?

One format

@mdgate/xlsx

Your own set

@mdgate/core
+ @mdgate/xlsx
+ @mdgate/pdf
+ @mdgate/docx

Broad file support

@mdgate/converters

FAQ

Can I convert XLSM to Markdown without uploading it?

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

Does XLSM to Markdown work in Cloudflare Workers?

Yes. @mdgate/xlsx 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 XLSM converter?

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

Does this convert CSV?

No. Use @mdgate/csv for .csv and .tsv.