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Base64 to Image

Convert Base64 strings back to images

Base64 String

Try These Examples

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Enter a valid Base64 string to see the image preview

Supported Formats

Data URI format: data:image/png;base64,iVBORw0KGgo...
Raw Base64 strings (will try to decode as PNG)
All image formats: PNG, JPG, GIF, WebP, SVG, etc.
Automatically detects format from data URI MIME type

About Base64 to Image Decoder

Our free Base64 to image decoder converts Base64-encoded strings back into viewable, downloadable image files. Whether you have a data URI from an HTML document, a Base64 string from an API response, or encoded image data from a database, this tool instantly renders the image and provides detailed format information.

Base64 encoding represents binary data (like images) as ASCII text using a set of 64 characters. This encoding is commonly used to embed images directly in HTML, CSS, JSON responses, and email messages. Our decoder reverses this process, taking the Base64 text and reconstructing the original image for preview and download.

The tool supports both full data URI format (data:image/png;base64,...) and raw Base64 strings without headers. It automatically detects the image format from the MIME type, displays file information including estimated size, and lets you download the decoded image in its original format -- all without uploading any data to a server.

Key Features

Decode Base64 strings to viewable images instantly
Support for both data URI format and raw Base64 input
Automatic MIME type and image format detection
All major formats supported: PNG, JPG, GIF, WebP, SVG, BMP
Live image preview with actual rendered output
Estimated file size calculation for the decoded image
One-click download of decoded images in original format
Paste from clipboard button for quick input
Built-in example templates to test the tool
Complete client-side processing for total privacy

How to Use the Base64 to Image Decoder

Paste your Base64 string: Enter the Base64-encoded text into the input area. You can type, paste manually, or use the Paste button to read from your clipboard.
Automatic decoding: The tool immediately attempts to decode the string and render the image in the preview panel on the right.
Review image details: Check the Image Information panel for format, MIME type, and estimated file size.
Download the image: Click the Download button to save the decoded image to your device in its original format.
Try examples: Click the example buttons to load sample Base64 strings and see how the decoder processes different image types.

Use Cases

Extracting Embedded Images: Decode data URIs found in HTML source code, CSS stylesheets, or Markdown documents to view and save the original images.
API Development: Preview images returned as Base64 strings in API responses before integrating them into your application.
Email Debugging: Extract and view inline images from HTML email source code that use Base64-encoded data URIs.
Database Recovery: Decode image data stored as Base64 text in database fields to verify contents or recover image files.
Frontend Debugging: Verify that Base64-encoded images in your code render correctly by previewing them outside of your application context.
Security Analysis: Examine Base64-encoded image payloads in network traffic, logs, or suspicious files to inspect their visual content.
Content Migration: Convert embedded Base64 images back to standalone files when migrating content between platforms or CMS systems.

Frequently Asked Questions

What is a Base64-encoded image?

A Base64-encoded image is the binary data of an image file converted into a text string using the Base64 alphabet (A-Z, a-z, 0-9, +, /). This allows images to be embedded directly in text-based formats like HTML, CSS, and JSON without requiring separate image files.

What is a data URI?

A data URI is a scheme that allows you to include data inline in web pages. For images, it follows the format data:image/[format];base64,[encoded-data]. The MIME type tells the browser what kind of image to expect.

What image formats are supported?

This decoder supports all standard image formats including PNG, JPEG, GIF, WebP, SVG, BMP, and ICO. The format is automatically detected from the data URI MIME type, or PNG is assumed for raw Base64 strings.

Is this tool free?

Yes, this Base64 to image decoder is completely free with no usage limits, no registration required, and no restrictions on image size or number of conversions.

Is my data secure?

Yes. All decoding happens entirely in your browser. The Base64 string you paste is never transmitted to any server, making this tool safe for decoding sensitive or confidential image data.

Why is my Base64 string not decoding?

Common issues include incomplete Base64 strings (truncated during copy), incorrect data URI format, non-image MIME types, or corrupted encoding. Ensure you copy the complete string including the data:image prefix if present.

Tips & Best Practices

Include the data URI header: For best results, paste the complete data URI including the data:image/[format];base64, prefix so the tool can detect the correct image format.
Use the paste button: The Paste button reads directly from your clipboard, which is faster and less error-prone than manual pasting for long Base64 strings.
Check the estimated size: The Image Information panel shows the approximate file size of the decoded image, which helps you understand the original image dimensions.
Try the examples first: Use the built-in examples to familiarize yourself with the tool before decoding your own Base64 data.
Download for verification: Download the decoded image and open it in an image editor to verify quality, dimensions, and color accuracy.