Translate Mandrill Handlebars templates into SparkPost templates
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Latest commit 66f358d Jan 9, 2018

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This is a Mandrill to SparkPost email template migration tool. It supports translation of Mandrill's Handlebars syntax into equivalent SparkPost syntax.

The tool presents a simple web UI for migrating templates directly from your Mandrill account to SparkPost as well as translating Mandrill template text directly into its SparkPost equivalent.

If you want to automate your migration, the tool also has an API.

See below for details on deployment on Heroku, manual deployment and API use.

Supported Features

  • Basic Handlebars syntax: variables, logic, iteration
  • Logic and iteration: if, each
  • Mandrillisms: elseif, backtick conditionals `x < 10`
  • Inline helpers: upper, lower and title are accepted but ignored
  • MailChimp merge tags: *|variable_name|*

Unsupported Features

  • HTML escaping: please put your markup in your template
  • Inline helpers: url, data, striptags
  • Block helpers: unless, with

Heroku Deployment

You can deploy it directly to Heroku: Deploy

Manual Deployment

If you prefer you can deploy it into your own environment using the instructions below.


  • node 0.12+
  • npm 2.11.3+
git clone --recursive
cd mandrill-sparkpost-templates
npm install
npm run start

You now have a server running on port 3000.


The UI

Once deployed, you can migrate templates between services or translate template text directly through the web UI.


If you prefer direct API access or you want to automate your template migration, here's how the API endpoints work.

API Errors

On error, the API endpoints will return a non-200 status code and a JSON error object containing a list of errors:

  "errors": [
    {"message": "Description of a thing that did not work."},
    {"message": "..."}

/api/translate: Template Translation

Accept a Mandrill template and convert it SparkPost format.


POST /api/translate HTTP/1.1
Content-Type: application/json

  "mandrillTemplate": "..."

Successful response:

HTTP/1.1 200 OK
Content-Type: application/json

  "sparkPostTemplate": "..."

/api/migrate: Migration From Mandrill To SparkPost

Extract a template from Mandrill, translate it and import it into SparkPost.

Note: your SparkPost API key must include Templates Read/Write privileges for use with the migrate endpoint and the migration UI.


POST /api/migrate HTTP/1.1
Content-Type: application/json

  "mandrillAPIKey": "...",
  "mandrillTemplateName": "...",
  "sparkPostAPIKey": "..."

Successful response:

HTTP/1.1 200 OK
Content-Type: application/json

  "result": true


We welcome your contributions. Check out our contributor notes for details on how to help out.


See ChangeLog here

Updating Handlebars

If you make a change to the Handlebars subrepo, you must rebuild it:

npm run buildhb
npm run disthb

Remember to commit the updated Handlebars build in vendor/handlebars.

Running Tests

npm run test