Base64 to Image Converter
Convert base64 encoded strings back to downloadable images. Supports data URIs, CSS values, HTML tags, and raw base64 strings.
Paste Base64 Data
Why Choose Our Base64 to Image Converter?
Smart Detection
Automatically detects and extracts base64 data from various formats including data URIs, CSS, and HTML.
Instant Preview
See your converted image immediately with detailed information about dimensions and file size.
All Formats
Supports all image formats including PNG, JPG, WebP, GIF, SVG, and more.
Privacy First
All processing happens in your browser. Your data never leaves your device.
How to Convert Base64 to Image
Paste Your Base64 Data
Copy and paste your base64 string into the text area. Our tool supports various formats: data URIs, CSS background-image values, HTML img tags, or raw base64 strings.
Automatic Processing
The tool automatically detects the format and converts the base64 data back to an image. You'll see a preview along with image details like dimensions and file size.
Download Your Image
Click the download button to save the converted image to your device. The original format and quality are preserved during conversion.
Common Use Cases
Web Development
Extract images from CSS data URIs or HTML img tags for debugging and optimization.
Email Templates
Convert embedded base64 images from email templates back to regular image files.
API Integration
Decode base64 image data received from APIs and save as downloadable files.
Mobile Apps
Extract images from mobile app data or configuration files that use base64 encoding.
Database Recovery
Recover images stored as base64 strings in databases or backup files.
Design Tools
Convert base64 images from design tools or prototyping applications.
How the Base64 to Image works
Base64 is a way of writing binary data (like a PNG or JPEG file) using only 64 printable characters, so it can travel inside JSON, HTML, CSS or e-mail. Every 3 bytes of the original file become 4 characters, which is why a Base64 string is about 33% larger than the image it represents.
When you paste a string, the tool first strips wrappers it recognises: a full data URI (data:image/png;base64,…), a CSS background-image: url(…) value or an HTML <img src="…"> tag. It then decodes the remaining characters back into bytes in your browser and shows the result as a normal image you can preview and download. Nothing is sent to a server.
Example: recovering a logo from a stylesheet
A 6 KB PNG logo embedded in CSS appears as roughly 8,000 Base64 characters (6 KB × 4/3). Paste the whole url(data:image/png;base64,…) value, and the tool extracts the PNG, shows its pixel dimensions and lets you save it as logo.png. You get the original 6 KB file back, bit for bit, because Base64 decoding is lossless.
Tips for the best result
- Keep the data:image/…;base64, prefix if you have it: it tells the tool the exact format (PNG, JPEG, GIF, WebP, SVG) so the downloaded file gets the correct extension.
- Line breaks and spaces inside the string are fine; strings copied from e-mail sources often wrap at 76 characters.
- If a string comes from a JSON API response, remove the surrounding quotes and any escaped characters such as \n or \/ first.
Limitations to know
- Very large strings (tens of megabytes) are limited by your browser’s memory and the text box may become slow to paste into.
- The tool decodes images only. Base64 that contains a PDF, ZIP or other file type will not render as a preview.
Troubleshooting
- “Invalid or corrupted base64 image data” error
- The string is usually truncated. Copy it again and make sure it ends with the final characters (often one or two “=” padding signs).
- Preview is blank or broken
- The data may not be an image, or the prefix declares the wrong type (for example image/png on JPEG data). Remove the prefix and try again.
Base64 to Image: common questions
Is Base64 decoding lossless?
Yes. Base64 is an encoding, not compression, so the decoded image is byte-for-byte identical to the original file.
Why is my Base64 string bigger than the image?
Base64 represents every 3 bytes with 4 characters, so the text is about 33% larger than the binary file.
Can I decode a data URI from CSS or HTML directly?
Yes. Paste the whole url(…) value or <img> tag; the tool extracts the Base64 part automatically.
Is my data uploaded anywhere?
No. Decoding runs entirely in your browser with JavaScript; the string never leaves your device.