This tool can glob a folder of markdown files with yaml frontmatter (typically found in Gatsby blogs) and ouput a Sanity.io .ndjson-import file.

As a global CLI tool:

npm i -g markdown-to-sanity

# or

yarn add --global markdown-to-sanity

As a project dependency:

npm i markdown-to-sanity

# or

yarn add markdown-to-sanity

As CLI:

> markdown-to-sanity # follow the instructions

The CLI will write a ndjson-file you can use with sanity dataset import. Learn more about importing data to Sanity.

In a project:

const migrateFiles = require('markdown-to-sanity')

migrateFiles({
  inputPath: '~/Sites/gatsby-blog/src/pages',
  filename: 'production',
  outputPath: './'
})