mdgate converters

XLSX to Markdown in your browser.

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

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

Starting local converter

Use XLSX 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 XLSX to Markdown works

  1. XLSX
  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 XLSX 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

XLSX files can stay inside your application or browser.

Content detection

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

Deterministic parsing

The same XLSX file produces repeatable Markdown without model inference.

Small runtime surface

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

XLSX for AI agents

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

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

Need more than XLSX?

One format

@mdgate/xlsx

Your own set

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

Broad file support

@mdgate/converters

FAQ

Can I convert XLSX to Markdown without uploading it?

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

Does XLSX 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 XLSX converter?

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

Does this convert CSV?

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