Dekoder i przeglądarka obrazów Base64

data:[<media type>][;base64],<data>

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==

// Konwertuj obraz na base64 w JavaScript (przeglądarka)
function imageToBase64(imgElement) {
  const canvas = document.createElement('canvas');
  canvas.width = imgElement.width;
  canvas.height = imgElement.height;
  
  const ctx = canvas.getContext('2d');
  ctx.drawImage(imgElement, 0, 0);
  
  // Uzyskaj jako URL danych (ciąg base64)
  return canvas.toDataURL('image/png');
}

// Wyświetl obraz base64
function displayBase64Image(base64String) {
  const img = new Image();
  
  // Obsłuż ciągi bez prefiksu URL danych
  if (!base64String.startsWith('data:')) {
    base64String = `data:image/png;base64,${base64String}`;
  }
  
  img.src = base64String;
  document.body.appendChild(img);
}

import base64
from PIL import Image
from io import BytesIO

# Konwertuj plik obrazu na base64
def image_to_base64(image_path):
    with open(image_path, "rb") as image_file:
        encoded_string = base64.b64encode(image_file.read())
        return encoded_string.decode('utf-8')

# Konwertuj base64 na obraz i zapisz
def base64_to_image(base64_string, output_path):
    # Usuń prefiks URL danych, jeśli jest obecny
    if ',' in base64_string:
        base64_string = base64_string.split(',')[1]
    
    image_data = base64.b64decode(base64_string)
    image = Image.open(BytesIO(image_data))
    image.save(output_path)

# Przykład użycia
base64_str = image_to_base64("input.jpg")
print(f"data:image/jpeg;base64,{base64_str[:30]}...") # Wydrukuj początek ciągu

base64_to_image(base64_str, "output.jpg")

<?php
// Konwertuj plik obrazu na base64 w PHP
function imageToBase64($path) {
    $type = pathinfo($path, PATHINFO_EXTENSION);
    $data = file_get_contents($path);
    return 'data:image/' . $type . ';base64,' . base64_encode($data);
}

// Konwertuj base64 na obraz i zapisz
function base64ToImage($base64String, $outputPath) {
    // Wyodrębnij zakodowane w base64 dane binarne
    $imageData = explode(',', $base64String);
    $imageData = isset($imageData[1]) ? $imageData[1] : $imageData[0];
    
    // Dekoduj i zapisz
    $data = base64_decode($imageData);
    file_put_contents($outputPath, $data);
}

// Przykład użycia
$base64Image = imageToBase64('input.jpg');
echo substr($base64Image, 0, 50) . "...\n"; // Wydrukuj początek ciągu

base64ToImage($base64Image, 'output.jpg');
?>

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.util.Base64;

public class Base64ImageUtil {
    
    // Konwertuj plik obrazu na base64
    public static String imageToBase64(String imagePath) throws IOException {
        File file = new File(imagePath);
        byte[] fileContent = Files.readAllBytes(file.toPath());
        String extension = imagePath.substring(imagePath.lastIndexOf(".") + 1);
        String base64String = Base64.getEncoder().encodeToString(fileContent);
        
        return "data:image/" + extension + ";base64," + base64String;
    }
    
    // Konwertuj base64 na obraz i zapisz
    public static void base64ToImage(String base64String, String outputPath) throws IOException {
        // Usuń prefiks URL danych, jeśli jest obecny
        if (base64String.contains(",")) {
            base64String = base64String.split(",")[1];
        }
        
        byte[] decodedBytes = Base64.getDecoder().decode(base64String);
        
        try (FileOutputStream fos = new FileOutputStream(outputPath)) {
            fos.write(decodedBytes);
        }
    }
    
    public static void main(String[] args) throws IOException {
        String base64Image = imageToBase64("input.jpg");
        System.out.println(base64Image.substring(0, 50) + "..."); // Wydrukuj początek ciągu
        
        base64ToImage(base64Image, "output.jpg");
    }
}

using System;
using System.IO;
using System.Text.RegularExpressions;

class Base64ImageConverter
{
    // Konwertuj plik obrazu na base64
    public static string ImageToBase64(string imagePath)
    {
        byte[] imageBytes = File.ReadAllBytes(imagePath);
        string base64String = Convert.ToBase64String(imageBytes);
        
        string extension = Path.GetExtension(imagePath).TrimStart('.').ToLower();
        return $"data:image/{extension};base64,{base64String}";
    }
    
    // Konwertuj base64 na obraz i zapisz
    public static void Base64ToImage(string base64String, string outputPath)
    {
        // Usuń prefiks URL danych, jeśli jest obecny
        if (base64String.Contains(","))
        {
            base64String = base64String.Split(',')[1];
        }
        
        byte[] imageBytes = Convert.FromBase64String(base64String);
        File.WriteAllBytes(outputPath, imageBytes);
    }
    
    static void Main()
    {
        string base64Image = ImageToBase64("input.jpg");
        Console.WriteLine(base64Image.Substring(0, 50) + "..."); // Wydrukuj początek ciągu
        
        Base64ToImage(base64Image, "output.jpg");
    }
}

require 'base64'

# Konwertuj plik obrazu na base64
def image_to_base64(image_path)
  extension = File.extname(image_path).delete('.')
  base64_data = Base64.strict_encode64(File.read(image_path))
  "data:image/#{extension};base64,#{base64_data}"
end

# Konwertuj base64 na obraz i zapisz
def base64_to_image(base64_string, output_path)
  # Usuń prefiks URL danych, jeśli jest obecny
  if base64_string.include?(',')
    base64_string = base64_string.split(',')[1]
  end
  
  File.open(output_path, 'wb') do |file|
    file.write(Base64.decode64(base64_string))
  end
end

# Przykład użycia
base64_image = image_to_base64('input.jpg')
puts base64_image[0, 50] + '...' # Wydrukuj początek ciągu

base64_to_image(base64_image, 'output.jpg')

' Funkcja Excel VBA do kodowania pliku na base64
Function FileToBase64(filePath As String) As String
    Dim fileNum As Integer
    Dim fileData() As Byte
    Dim objXML As Object
    Dim objNode As Object
    
    fileNum = FreeFile
    Open filePath For Binary Access Read As fileNum
    ReDim fileData(LOF(fileNum) - 1)
    Get fileNum, , fileData
    Close fileNum
    
    Set objXML = CreateObject("MSXML2.DOMDocument")
    Set objNode = objXML.createElement("b64")
    
    objNode.DataType = "bin.base64"
    objNode.nodeTypedValue = fileData
    
    FileToBase64 = objNode.Text
    
    Set objNode = Nothing
    Set objXML = Nothing
End Function

' Użycie w Excelu:
' =FileToBase64("C:\path\to\image.jpg")

<!-- Osadzanie obrazu base64 bezpośrednio w HTML -->
<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==" alt="Obraz zakodowany w base64">

<!-- Użycie CSS z obrazem tła base64 -->
<style>
.base64-bg {
  background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==');
  width: 100px;
  height: 100px;
}
</style>
<div class="base64-bg"></div>