Python base64 decode png

Convert Base64 To Image In Python

Last updated June 16, 2023 by Jarvis Silva In this tutorial I will show you how to convert base64 to image file using python, To convert base64 to image we will use the python library Base64 it allows us to decode base64 code, It comes preinstalled with python so you don’t have to install it.

Python Code To Convert Base64 To Image

 # Import base64 module import base64 # Get the base64 file data with open('base64.txt', 'rb') as bs64_file: bs64_data = bs64_file.read() # Decode base64 decoded_img_data = base64.b64decode((bs64_data)) # Create image file from base64 with open('output.jpeg', 'wb') as img_file: img_file.write(decoded_img_data) 

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Python base64 decode png

Last updated: Jun 23, 2023
Reading time · 4 min

# Table of Contents

# Convert an Image to a Base64-encoded String in Python

To convert an image to a base64 string in Python:

1. Use the with open() statement to open the image file.
2. Use the file.read() method to read the image’s contents.
3. Use the base64.b64encode() method to encode the bytes using Base64 and return a bytes-like object.

Copied! 
import base64 with open('house.webp', 'rb') as image_file: base64_bytes = base64.b64encode(image_file.read()) print(base64_bytes) base64_string = base64_bytes.decode() print(base64_string) 

The code sample assumes that you have the following house.webp image in the same directory as your Python script.

You can right-click on the image and select «Save image as» to download it.

We first imported the base64 native Python module.

The module provides functions for encoding binary data to printable ASCII characters and decoding such encodings back to binary data.

The next step is to use the with open() statement to open the image file in rb (read binary) mode.

The with open() statement takes care of closing the file even if an error occurs.

Copied! 
import base64 with open('house.webp', 'rb') as image_file: base64_bytes = base64.b64encode(image_file.read()) print(base64_bytes) base64_string = base64_bytes.decode() print(base64_string) 

The base64.b64encode method encodes the supplied bytes-like object using Base64 and returns the encoded bytes.

If you want to convert the base64 encoded bytes to a string, use the bytes.decode method.

Copied! 
base64_string = base64_bytes.decode() print(base64_string) 

The bytes.decode() method converts the bytes object to a string and removes the b prefix.

You can also pass the encoding as an argument to the decode() method.

The default encoding is utf-8 .

Copied! 
base64_string = base64_bytes.decode('utf-8') print(base64_string) 

The first argument we passed to the open() function is the path to the image file.

If you are on Windows, prefix the path with r to mark it as a raw string.

Copied! 
image_path = r'C:\Users\Alice\Desktop\my-image.png' 

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Carlos Aguni

Highly motivated self-taught IT analyst. Always learning and ready to explore new skills. An eternal apprentice.

Image encode/decode base64

import base64 import io from PIL import Image def img_to_txt(filename): msg = b"" with open(filename, "rb") as imageFile: msg = msg + base64.b64encode(imageFile.read()) msg = msg + b"" return msg def decode_img(msg): msg = msg[msg.find(b"")+len(b""): msg.find(b"")] msg = base64.b64decode(msg) buf = io.BytesIO(msg) img = Image.open(buf) return img filename = 'test.png' msg = img_to_txt(filename) img = decode_img(msg) img.show() 

#https://stackoverflow.com/questions/48229318/how-to-convert-image-pil-into-base64-without-saving/48229407 #ty @Taha Mahjoubi def img_to_base64_str(img): buffered = io.BytesIO() img.save(buffered, format="PNG") buffered.seek(0) img_byte = buffered.getvalue() img_str = "data:image/png;base64," + base64.b64encode(img_byte).decode() return img_str def img_from_base64_str(msg): msg = msg.replace("data:image/png;base64,", "") msg = base64.b64decode(msg) buf = io.BytesIO(msg) img = Image.open(buf) return img #https://stackoverflow.com/questions/38061267/matplotlib-graphic-image-to-base64 def plot_base64(): s = io.BytesIO() plt.savefig(s, format='png', sbbox_inches='tight') plt.close() img_str = "data:image/png;base64," + base64.b64encode(s.getvalue()).decode() return img_str def plot_png(): #fig = create_figure() args = request.args.to_dict() fig = horizon(args) output = io.BytesIO() FigureCanvas(fig).print_png(output) return Response(output.getvalue(), mimetype='image/png') 

Matplotlib fig to img

def fig2img(fig): """Convert a Matplotlib figure to a PIL and return it""" import io buf = io.BytesIO() fig.savefig(buf) buf.seek(0) img = Image.open(buf) return img 

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Convert base64 string to Image in Python

Have you ever wondered how Images are being stored and transferred without being corrupted? Sometimes, when we open the images in their raw format, we observe that they are encoded in strange characters. Such characters represent Base64 string data. There is a need to convert them back to their original format. In this tutorial, we will learn how to convert Base64 string to Image in Python.

What is the Base64 module in Python?

Base64 is a module in python that is used for encoding and decoding data. A Base64 encoded data is the one wherein the binary form of data is represented in printable ASCII string format by translating to radix-64 representation. Decoding the data is exactly the opposite of encoding. Here the data in ASCII format is converted back to the binary data. This binary data is converted into byte-sized chunks which are converted back to the original format

Why Base64 encoding and decoding is required?

There are multiple reasons for converting the Base64 string to Image and vice versa. The following points explain the need for encoding and decoding images.

1. Base64 is used to convert images into data that can be embedded within various formats such as HTML, CSS, JSON, etc. For instance, as the image data is already embedded in the document, the browser doesn’t need to make an additional web request to fetch the file. If we want to retrieve the images back from the embedded data, we can use base64 decoding.
2. Base64 can also be used to encode the images such that they can be stored and transferred without being corrupted. Once the images have reached their destination, they can be decoded back to their original format.

Code to convert Base64 string to Image in Python

#importing base64 module import base64 #open file with base64 string data file = open('file1.txt', 'rb') encoded_data = file.read() file.close() #decode base64 string data decoded_data=base64.b64decode((encoded_data)) #write the decoded data back to original format in file img_file = open('image.jpeg', 'wb') img_file.write(decoded_data) img_file.close()

Base64 string data stored in file1.txt:

Output image generated after decoding the Base64 string:

How does the code to convert Base64 string to Image work?

The following steps give the working of the above code to convert the base64 string to Image in Python:

1. First, we import the base64 module
2. Then open the file which contains base64 string data for an image. We do this using the open() function in python. The open() function takes two parameters-the file to be opened and the mode. In our case, the mode is ‘rb’ (read binary).
3. We take the binary data and store it in a variable. Then we close the file.
4. We decode the Base64 string data using the b64decode() function of the base64 module. This function takes the encoded data as a parameter.
5. We create a file named image.jpeg to store the decoded data in its original Image format. To write the data onto the file, we use the write() function in Python. The function uses the mode as ‘wb’ (write binary). We then finally close the file.

Thus we have reached the end of the tutorial.
You can learn how to convert Image to Base64 string data from the following link: Base64 to Image

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