Base64 to Image Converter
Decode Base64 strings back to images online for free. Paste any Base64 string, data URI or data URL — preview the decoded image and download it instantly.
Paste Any Base64
Accepts raw Base64 strings, full data URIs (data:image/png;base64,...), and data URLs from any source — API responses, HTML source code, CSS files.
Instant Live Preview
The decoded image appears in the preview panel the moment you paste a valid Base64 string — before you need to download anything.
Download as Image File
Save the decoded image as PNG, JPG or WebP with one click. The filename and format are inferred from the data URI MIME type automatically.
100% Private
Your Base64 data never leaves your device. Decoding runs entirely in your browser — zero uploads, zero server contact.
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📖 How to Use the Base64 to Image Converter
Paste Your Base64 String
Paste any Base64-encoded image string into the text area. Accepts raw Base64 strings, complete data URIs (data:image/png;base64,...) or data URLs from any source.
Preview the Image
The decoded image appears in the live preview panel automatically as soon as a valid Base64 string is detected. Invalid or incomplete strings show an error.
Check Image Details
View the detected image format, decoded file size and image dimensions before downloading — so you know exactly what you are saving.
Download the Image
Click Download to save the decoded image as a PNG, JPG or WebP file. The format is determined automatically from the data URI MIME type.
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❓ Frequently Asked Questions
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💡 Why Use Our Base64 to Image Converter?
Instant Visual Validation
See the decoded image immediately in the live preview — before downloading. Confirm it is the right image before saving to disk. Essential for debugging.
Smart Auto-Detection
MIME type, image format and dimensions are all detected automatically from the Base64 string. No manual configuration — paste and go.
Round-Trip Accuracy
Base64 decode is mathematically lossless. The downloaded image is bit-for-bit identical to the original that was encoded. Zero quality loss.
Complete Privacy
Your Base64 data — which may contain sensitive images — never leaves your browser. No upload, no server, no logging. Safe for confidential and proprietary image data.
No Processing Delay
Decoding happens in milliseconds in your browser. No server round-trip means no waiting — paste, preview, download in under 3 seconds.
Free with No Limits
Full Base64 decoding — all formats, strings up to 10MB — completely free. No account, no watermarks on downloaded images.
📚 Complete Guide — Base64 to Image Converter
What Is Base64 Image Decoding?
Base64 decoding is the reverse of encoding — it converts a Base64 ASCII string back to the original binary image file. The decoded bytes are identical to the original file. This is useful whenever you have a Base64-encoded image from an API response, HTML source, CSS file or configuration and need to save or inspect it as a regular image file.
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Where to Find Base64-Encoded Images
| Source | How to Find | Format |
|---|---|---|
| HTML img tag | Right-click → Inspect, copy src attribute value | Data URI |
| CSS background | DevTools → Styles panel, copy url() value | Data URI |
| JSON API response | Copy the string value of the image field | Raw Base64 or Data URI |
| HTML email source | View source, find img src="data:..." attributes | Data URI |
| JavaScript variable | Copy the string value assigned to the variable | Data URI |
Understanding Data URI Structure
A complete data URI has the structure: data:[MIME type][;charset][;base64],[data]. For images: data:image/png;base64,iVBORw0KGgoAAAANSUhEUg.... The parts are: data: scheme identifier, image/png MIME type, ;base64 encoding indicator, , separator, then the Base64-encoded data. Our decoder handles all parts automatically — paste the full URI or just the data after the comma.
Debugging API Image Payloads
REST APIs and GraphQL endpoints sometimes return image data as Base64 strings rather than file URLs — particularly for generated images, thumbnails, avatars and document previews. When an API response contains an unexpected image, paste the Base64 field value here to visually inspect what the API is actually returning. This is faster and more reliable than writing a one-off script to decode and save the file.
Extracting Images from HTML Email Templates
HTML email templates often embed images as Base64 data URIs to ensure images display without external HTTP requests. If you receive such an email and need to extract an embedded image: (1) View the email source (in Gmail: three-dot menu → Show original). (2) Find the img tag with a data: src. (3) Copy the src attribute value. (4) Paste it here and download the image.