Oct 17, 2016

Automatically convert files in S3 buckets using AWS Lambda

AWS Lambda is an event-driven compute service which runs your code (Lambda functions) in response to events, such as changes to data in an Amazon S3 bucket. The CloudConvert API can be used to automatically convert all files, added to a specific S3 bucket. Typical use cases are converting all office documents to PDF, creating thumbnails or encoding videos.

We have created a GitHub repository with an example Lambda function. To get it running, follow these instructions:

  • Download / Fork the repository
  • Run npm install
  • Adjust convert.js according to your needs:
  • Set CLUDCONVERT_API_KEY to your personal API key.
  • Set AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY for downloading and uploading from/to your S3 bucket.
  • Adjust the conversion paramaters, such as outputformat according to your need. All possible options can be identified using the API Console.
  • Create a ZIP file which contains convert.js and the node_modules folder.
  • In the AWS Console create a new Lambda function. Select Blank Function blueprint.
  • Select S3 trigger and your bucket. Set Event Type to PUT. Adjust Prefix and Suffix to trigger for specific files only.
  • Choose a name for your Lambda function and use Node.js 4.3  as Runtime. Upload your previously created ZIP file as Lambda function. The Handler name needs to be convert.handler. The lambda function does not need any specific permissions: you can create a new empty role.
  • A timeout value of 10 seconds should be sufficient. Please note that the lambda function only triggers the actual conversion and terminates as soon as the conversion was started. Therefore the timeout does not affect the time needed for the actual conversion.
  • Done! You can test your Lambda function by adding a new file to your S3 bucket.

Jun 7, 2016

OpenStack, Microsoft Azure and Google Cloud Integration

Our Amazon S3 integration is a well used feature. Besides S3 we now have integrated OpenStack Storage (Swift), Microsoft Azure File Storage and Google Cloud Storage. You can use any of these file storage solutions as input and output for CloudConvert conversions. Our API Console has been updated and can be used to live-test the new storage options.

Feb 26, 2016

Zapier Integration

We are happy to announce that CloudConvert is now fully integrated with Zapier! Using Zapier you can connect CloudConvert to 500+ other Apps like Evernote, Basecamp, Gmail, Trello, Slack and so many others. Below you can find some ideas for possible "Zaps".

We are looking forward to see your workflows and use cases for Zapier!

Feb 1, 2016

Improved file uploading API

We did a lot of improvements on our API regarding input file uploads. Previously you had to embed the file together with all your parameters in a single multipart/form-related POST request. Although such multipart requests are widely used, implementing them is often pretty inconvenient. Therefore we decided to provide an alternative way of uploading the input files. In short you can use now a simple PUT requests to a designated upload url and send the actual file content as body of your request. Checkout our updated API documentation for details.

Using a designated upload url has another advantage: If your input files are provided by your users, you can now let them upload their files directly to CloudConvert. This avoids the time consuming process of uploading the files to your server first and afterwards sending them to us. We have updated our PHP wrapper with an example on how to use this:

require __DIR__ . '/vendor/autoload.php';
use \CloudConvert\Api;
$api = new Api("your_api_key");
$process = $api->createProcess([
 'inputformat' => 'png',
 'outputformat' => 'jpg',
 'input' => 'upload',
 'outputformat' => 'jpg',
 'converteroptions' => [
   'quality' => 75,
 'callback' => 'http://_INSERT_PUBLIC_URL_TO_/callback.php'
<form action="<?=$process->upload->url?>" method="POST" enctype="multipart/form-data">
 <input type="file" name="file">
 <input type="submit">

Don't worry - as always, our API stays full backward compatible. If you are using the old method of uploading files, nothing needs to be changed. Our suggestion of using the new method only applies to new implementations.

Nov 27, 2015

Python API Wrapper

We just pushed the official Python API Wrapper to Github. Using it you can do cool stuff with just a few lines of code:

import cloudconvert
api = cloudconvert.Api('your_api_key')
process = api.convert({
    'inputformat': 'html',
    'outputformat': 'pdf',
    'input': 'upload',
    'file': open('input.html', 'rb')

As always, you can create ready to use code snippets using the API console.

Nov 25, 2015

Dynamic PDF creation using DOCX templates

When creating PDF files from DOCX or PPTX files CloudConvert can now dynamically change the content. This feature makes it more convenient to create invoices or mass letters dynamically. Technically you set up a DOCX template with placeholders (for example ${name}). While converting the DOCX file to PDF CloudConvert can replace these placeholders with custom values. This even works for tables with a variable amount of rows as the following example shows.


The shown PDF was created using the DOCX template file and these few lines of PHP code:

    "input" => "upload",
    "inputformat" => "docx",
    "outputformat" => "pdf",
    "converteroptions" => [
       "templating" => [
          "name" => "John Smith",
          "address" => "Smithstreet 1",
          "city" => "Smithtown",
          "zip" => "10101",
          "country" => "US",
          "comment" => "Thanks for your business!",
          "date" => "2015-11-24",
          "total" => "160",
          "items" => [
            ["description" => "Nameless product", "price" => "10", "quantity" => "2", "total" => "20"],
            ["description" => "Other product", "price" => "100", "quantity" => "1", "total" => "100"],
            ["description" => "Stuff", "price" => "2", "quantity" => "20", "total" => "40"],
    "file" => fopen('template.docx', 'r'),

Checkout the full Syntax for the placeholders of the new templating feature.

We think this feature is a great step to make CloudConvert even more powerful and we hope you like it!