Free tools

Base64 Image Decoder

Free online Base64 image decoder — convert Base64 strings back to images. Supports PNG, JPG, WebP, and GIF. Preview and download the decoded image instantly.

Base64 Image Encoder

Base64 Image Decoder Online

Convert Base64-encoded image strings back to regular image files. Simply paste your Base64 string and instantly preview the decoded image. Download in your preferred format — all processing happens in your browser for complete privacy.

What Is Base64 Image Decoding?

Base64 image decoding converts a Base64-encoded text string back into its original binary image format. This is useful when you need to extract images from API responses, data URIs in HTML/CSS, email content, or database fields where images are stored as text.

Common Use Cases

  • API responses: Extract images returned as Base64 in JSON responses
  • HTML/CSS: Decode data URIs embedded in stylesheets or markup
  • Email processing: Convert embedded email images to files
  • Database export: Restore images stored as Base64 text
  • Debugging: Inspect image data in API payloads or logs

How to Use This Tool

  1. Paste your Base64 image string into the input field
  2. The tool auto-detects the image format, or you can specify it manually
  3. Click Decode to Image to see the preview
  4. Choose your preferred download format and save the image

Supported Input Formats

FormatInput Example
Data URIdata:image/png;base64,iVBORw0...
Raw Base64iVBORw0KGgoAAAANSUhEUg...

Output Formats

You can download the decoded image in its original format or convert it to a different format:

  • Original: Keeps the detected source format
  • PNG: Best for graphics with transparency
  • JPEG: Best for photographs
  • WebP: Modern format with good compression

Everything runs in your browser — your Base64 strings and images are never sent to any server.

Frequently Asked Questions

How do I decode a Base64 image string?
Paste your Base64 image string into the input field and click Decode to Image. The tool will instantly display a preview of the decoded image. You can then download it in your preferred format. The entire process happens in your browser — your data never leaves your device.
What formats of Base64 images are supported?
The tool supports all standard Base64 image formats including PNG, JPG/JPEG, WebP, GIF, BMP, and TIFF. It can decode both data URIs (starting with data:image/...) and raw Base64 strings. If no format is specified, the tool will attempt to auto-detect it.
What is a Base64 image string?
A Base64 image string is binary image data that has been converted to text using Base64 encoding. It typically looks like a long string of letters, numbers, and symbols. When prefixed with data:image/[format];base64,, it becomes a data URI that can be used directly in HTML, CSS, or APIs.
Why would I need to decode Base64 to an image?
Common use cases include: extracting images from API responses, recovering images from data URIs in HTML/CSS, converting embedded email images to files, debugging image data in JSON payloads, and restoring images from database text fields.
Can I convert the decoded image to a different format?
Yes! After decoding, you can download the image in various formats including PNG, JPG, or WebP. This is useful when you need to convert the image format while decoding.
What if my Base64 string is invalid?
If the Base64 string is invalid or corrupted, the tool will display an error message. Make sure your string is complete (not truncated) and properly formatted. The tool accepts strings with or without the data:image prefix.
Is my data secure?
Yes. All decoding happens entirely in your browser using JavaScript. Your Base64 strings and resulting images are never uploaded to any server. This ensures complete privacy for your sensitive data.

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