---
title: Creating a file with base64 png dataURL
slug: creating-a-file-with-base64-png-dataurl
published_at: 2021-02-21 00:00:00 +0000
updated_at: 2024-07-27 21:59:26 +0000
summary: In this article, you will learn how to create a file from base64 PNG dataURL using Ruby, decode it, and handle it with ActiveStorage. 📄✨
tags: [Ruby, Code Snippet]
author: CJ Avilla
url: https://www.cjav.dev/articles/creating-a-file-with-base64-png-dataurl
type: article
---

# Creating a file with base64 png dataURL

*Published: February 21, 2021*
*Tags: Ruby, Code Snippet*

```rb
  def create
    # Stripe off the bits of the file data that are not part of the binary blob
    base64_file_content = params["thumbnail"]["file"]['data:image/png;base64,'.length..-1]

    # decode from base64
    decoded_image = Base64.decode64(base64_file_content)

    # create a Tempfile
    file = Tempfile.new([Time.now.to_i.to_s, ".png"])
    file.binmode
    file.write(decoded_image)
    file.rewind

    # Do something with your file, including using with ActiveStorage...

    # Clean up the tempfile
    file.close
    file.unlink

    # render or redirect.
  end
```


---

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