Base64 to Image Converter

Paste a Base64 string or data URI to instantly preview and download the decoded image, with automatic format detection.

Last reviewed: April 2026
Reviewed by , software engineer · last updated April 2026

New to this tool? Click here for instructions

Base64 Input
0 chars
Paste a Base64 string or data URI above.

How to Use the Base64 to Image Converter

To decode a Base64 image using this tool, follow these simple steps. The converter processes all data directly in your browser, ensuring privacy and speed.

  • Paste your Base64 string or data URI into the input area.
  • The tool automatically detects the image format and displays a preview.
  • Select your desired download format (PNG, JPEG, GIF, or WebP) from the options.
  • Click the "Download" button to save the image file to your device.

When to Use This Tool

The Base64 to Image Converter is useful in various development and data handling scenarios. It helps you quickly visualize and extract images embedded within text-based data.

  • Decoding images from REST API responses that return embedded thumbnails.
  • Extracting images stored as text within database records.
  • Converting images embedded in HTML, CSS, JSON, or other text formats for viewing or editing.
  • Verifying the content of Base64 encoded image data.

How the Converter Works

This Base64 to Image Converter operates entirely within your web browser. When you paste a Base64 string or data URI, the browser's built-in decoding functions process the data.

No data is sent to any server. This client-side processing ensures that your information remains private and secure, as the decoding happens locally on your machine.

Tips and Limitations

The tool supports a wide range of image formats, including PNG, JPEG, GIF, WebP, SVG, and BMP. It automatically detects the format from data URIs or by reading magic bytes for raw Base64 strings. If decoding fails, the status bar will indicate an error, helping you identify invalid Base64 input.

While the tool handles most valid Base64 inputs, extremely large images encoded in Base64 might impact browser performance due to memory usage. Ensure your Base64 string is correctly formatted to avoid decoding issues.

Frequently Asked Questions

Paste the Base64 string or a complete data URI into the input area. The tool will automatically decode it and display a preview. You can then click the "Download" button to save the image file in your chosen format.
A data URI includes a MIME type prefix (e.g., "data:image/png;base64,iVBOR..."), which specifies the image type. A raw Base64 string is just the encoded data without this prefix. This tool accepts both; it automatically detects the data URI prefix or attempts to identify the format from the decoded bytes for raw strings.
The tool can decode various image formats, including PNG, JPEG, GIF, WebP, SVG, and BMP. It supports any image format that your web browser can natively display and process.
Valid Base64 strings consist only of uppercase letters (A-Z), lowercase letters (a-z), digits (0-9), plus signs (+), forward slashes (/), and equals signs (=) for padding. Common issues include non-Base64 characters or incorrect padding. The tool's status bar will display an error if decoding fails.
No, all processing occurs directly within your web browser. The Base64 string is decoded using the browser's built-in functions, and no data is transmitted to any external server. This ensures your data remains private and secure.

Quick reference

Base64 to Image Converter Quick Reference
Parameter Description Base64 Example Image Format
Input Type Base64-encoded string iVBORw0KGgoAAAANSUhEUgAAASwAA... PNG
Supported Formats JPEG, PNG, GIF, WebP UEsDBBQABgAIAAAAIQD... JPEG
Encoding Type UTF-8 or ASCII SGVsbG8gd29ybGQ= GIF
Output Format Binary image data QkZGAAABAAEA... WebP
Decoding Method atob() function VGhpcyBpcyBhIHNlY... PNG
Common Use Cases Data URLs, embedded images data:image/png;base64,iVBORw0KGgoAAA... JPEG