Base64 to Image Converter
Decode Base64 strings to viewable and downloadable images instantly
Introduction
Our Base64 to Image Converter decodes Base64-encoded strings back into viewable and downloadable images. Whether you're extracting embedded images from HTML, processing API responses, or recovering images from databases, this tool handles all common image formats including JPG, PNG, WEBP, GIF, and SVG. Automatic format detection works with both complete data URLs and plain Base64 strings. All decoding happens entirely in your browser, ensuring your image data remains completely private and never touches any server.
Who Should Use This Tool?
- Web developers extracting embedded images
- API developers processing image responses
- Database administrators recovering images
- Email template developers
- QR code and icon managers
- Frontend developers debugging data URLs
- Data migration specialists
- Anyone working with Base64-encoded images
How This Tool Works
This tool decodes Base64 strings back to binary image data using JavaScript's built-in atob() function (or modern TextDecoder for better character handling). When you paste a Base64 string, the tool first checks if it's a complete data URL (starting with data:image/) or just the Base64-encoded portion. If it's a data URL, it extracts the MIME type (like image/jpeg or image/png) and the Base64 string. If only the Base64 string is provided, the tool decodes it first, then examines the binary data's magic numbers (file signatures) to automatically detect the image format—JPEGs start with FF D8 FF, PNGs with 89 50 4E 47, WEBPs with RIFF...WEBP, GIFs with GIF87a or GIF89a, and SVGs with XML text. After decoding the Base64 string to binary data, the tool creates a Blob object containing the image bytes with the appropriate MIME type. This Blob is converted to an object URL (blob://...) that the browser can render as an image in the preview area. The tool displays the detected format, calculates file size from the binary data length, and extracts image dimensions by loading the image into a hidden Image element. The download function converts the Blob to a downloadable file with the correct extension (.jpg, .png, .webp, .gif, or .svg). All processing happens entirely in your browser—the Base64 string is decoded locally, and no data is transmitted to any server. This ensures complete privacy for your image data. The tool handles Base64 strings of unlimited length, making it suitable for both small icons and larger images up to several megabytes.
Try Base64 to Image Converter Now
Use the interactive tool below to get instant results
Base64 Input
You can paste either:
- Full data URL: data:image/png;base64,iVBORw0KGgo...
- Base64 only: iVBORw0KGgoAAAANSUhEUgAA...
Supported formats: JPG, PNG, WEBP, GIF, SVG
Base64 Image Format Examples
Full Data URL (Recommended):
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA...Includes MIME type and encoding information
Base64 String Only:
iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9h...Pure Base64 without prefix (tool will auto-detect format)
Common Use Cases
- Extract images from HTML/CSS: Decode Base64 images embedded in code
- API response processing: Convert Base64 image data from API responses to viewable images
- Email image extraction: Decode images from HTML email templates
- Data recovery: Preview and save images stored as Base64 in databases or config files
How to Use Base64 to Image Converter
Paste Base64 String
Paste your Base64 string into the large text area. You can paste either a complete data URL (data:image/png;base64,iVBOR...) or just the Base64-encoded portion without the prefix. The tool accepts both formats and handles them appropriately. Use the 'Paste' button for quick clipboard access, or click 'Load Sample' to see an example Base64 string and test the tool's functionality.
Convert to Viewable Image
Click the 'Convert to Image' button to decode your Base64 string. The tool validates the input, automatically detects the image format (JPG, PNG, WEBP, GIF, or SVG), and converts the encoded data back into binary image format. The decoded image appears immediately in the preview area. Error messages display if the Base64 string is invalid or incomplete.
View Image Information
Examine the decoded image preview along with detailed information including the detected format type (JPEG, PNG, WEBP, GIF, or SVG), file size in kilobytes, and exact pixel dimensions (width and height). This information helps you verify the decoded image meets your requirements and is the correct file you expected to decode.
Download Decoded Image
Click the 'Download Image' button to save the decoded image to your device. The file downloads with the appropriate file extension automatically added based on the detected format (.jpg, .png, .webp, .gif, or .svg). The downloaded file is a standard image that opens in any image viewer or editor without additional conversion needed.
Use Cases for Base64 to Image Converter
Extract Embedded Images
Decode Base64 images that are embedded directly in HTML, CSS, or JavaScript files as data URLs. Extract these images to separate files for optimization, reuse, or archival purposes. Common when working with legacy code or email templates that embed images inline.
Process API Image Data
Convert Base64 image data received from REST APIs into viewable and downloadable images. Many APIs return images as Base64-encoded JSON properties rather than binary data, requiring decoding before the images can be viewed, edited, or saved. Essential for API testing and development.
Recover Database Images
Preview and download images that are stored as Base64 text in database fields. Useful for data migration projects, database inspection, backup recovery, or converting legacy systems that stored images as Base64 strings instead of binary BLOBs or file references.
Debug Email Templates
Extract and save images embedded in HTML email templates as Base64 data URLs. This helps when debugging email rendering issues, updating templates, or converting inline images to linked images for better email deliverability and reduced email size.
Decode QR Codes and Icons
Convert Base64-encoded QR codes, favicons, or small icons back into standard image files. These elements are often embedded as Base64 in configuration files, manifest files, or application metadata, and may need to be extracted for use in other contexts or updated separately.
Key Features
Instant Decoding
Decode Base64 strings to viewable images instantly
Format Support
Support for JPG, PNG, WEBP, GIF, and SVG formats
Auto Detection
Automatic image format detection from data
Flexible Input
Accept full data URLs or Base64 strings only
Image Info
Display image dimensions (width and height)
File Size
Show file size information in kilobytes
Download Support
Download decoded images with correct extension
Clipboard Paste
Paste from clipboard with one-click button
Sample Data
Load sample Base64 for testing purposes
Validation
Real-time Base64 validation with error messages
No Length Limit
Handle Base64 strings of unlimited length
Complete Privacy
Complete client-side processing for privacy
Frequently Asked Questions
What is Base64 to Image conversion?
Base64 to Image conversion decodes a Base64-encoded text string back into binary image data that can be viewed and saved. Base64 encoding converts binary data into ASCII text using 64 printable characters, commonly used to embed images in HTML/CSS or transmit images as text in APIs. This tool reverses that process, extracting the original image from its Base64 text representation.
What image formats can I decode?
The tool supports decoding Base64 strings for JPG/JPEG, PNG, WEBP, GIF, and SVG image formats. Format detection works automatically by analyzing the decoded binary data or reading the MIME type from data URLs. All common web image formats are supported, ensuring compatibility with images from virtually any source.
Do I need the data URL prefix?
No, you can paste either the complete data URL (data:image/png;base64,iVBOR...) or just the Base64 string without the prefix. When you paste only the Base64 string, the tool automatically detects the image format by examining the decoded binary data's magic numbers (file signatures). However, including the full data URL with MIME type provides more reliable format detection.
Why isn't my Base64 string converting?
Conversion failures typically occur when: (1) the Base64 string is incomplete or truncated, (2) it contains invalid characters beyond A-Z, a-z, 0-9, +, /, and =, (3) the data doesn't represent an actual image, or (4) there are line breaks or spaces within the string. Try the 'Load Sample' button to test with a known-good Base64 string and verify the tool works correctly.
Is my data sent to any server?
No, absolutely not. All Base64 decoding happens entirely in your browser using JavaScript. Your Base64 strings and decoded images never leave your device and are not transmitted to any server or stored anywhere. This ensures complete privacy and security for your images and sensitive visual data.