Convert API Blueprint to Swagger.

Usage no npm install needed!

<script type="module">
  import apib2swagger from 'https://cdn.skypack.dev/apib2swagger';



Build Status Coverage Status npm version

Convert API Blueprint to Swagger 2.0 or OpenAPI 3.0.

Supported versions:

  • API Blueprint 1A9
  • Swagger 2.0
  • OpenAPI 3.0.3
  • Node.js 12.x, 14.x, 16.x or higher


$ npm install -g apib2swagger


Convert to Swagger specification.

$ apib2swagger -i api.md
$ apib2swagger -i api.md -o swagger.json
$ apib2swagger -i api.md --yaml -o swagger.yaml
$ apib2swagger -i api.md --prefer-reference
$ apib2swagger -i api.md --bearer-apikey
$ apib2swagger -i api.md --open-api-3
$ apib2swagger -i api.md --info-title "My API Document Title"
$ apib2swagger -i api.md --prefer-file-ref

Without -i option it reads from STDIN, without -o option writes to STDOUT.

$ apib2swagger < api.md > swagger.json
$ cat api.md | apib2swagger

Run http server with SwaggerUI. SwaggerUI will be automatically downloaded to current dir.

$ apib2swagger -i api.md -s
$ apib2swagger -i api.md -s -p 3000

# When using file references and running the SwaggerUI server, you can specify the source
# directory with the -sd flag. It will check the input directory and execution directory
# if -sd is not given.
$ apib2swagger -i api.md -s --prefer-file-ref -sd ~/project/src/

Use as a library.

var apib2swagger = require('apib2swagger'),
    apib = '...',
    options = { 
        preferReference: true, 

        // optional (Swagger 2.0 only).
        bearerAsApikey: false,

        // optional. swagger 2.0 is used by default.
        openApi3: true, 

        // optional. title will be grabbed from blueprint if not specified.
        infoTitle: 'My API Document Title', 

        // optional (Open API 3 only). 
        // will set a $ref to the given file path instead of including the file contents.
        preferFileRef: true 

apib2swagger.convert(apib, options, function (error, result) {
    if (!error) console.log(result.swagger);


You can run apib2swagger via npx (without first needing to install it) like so:

cat api.md | npx apib2swagger > swagger.json


You can also run apib2swagger inside a docker container.

$ docker run -it --rm -v $(pwd):/docs ghcr.io/kminami/apib2swagger -i /docs/api.md -o /docs/swagger.json


Copyright (c) 2021 Keisuke Minami