Base64 Image Extractor - Online Download from Data URI

A Data URI (Uniform Resource Identifier) is a string that encodes an entire file—such as an image—directly into text using Base64 encoding. It follows the format data:[MIME-type];base64,[encoded-data]. Instead of linking to an external image file, the image data is embedded inline. This is commonly used in HTML <img> tags, CSS backgrounds, and email templates to reduce HTTP requests. Base64 encoding increases file size by approximately 33% compared to the original binary, but it simplifies asset management for small images and icons.

Simply paste the Data URI string into the input box above. Our tool automatically:

1. Parses the MIME type (e.g., image/png, image/jpeg)
2. Decodes the Base64 data back into binary
3. Displays a live preview of the image
4. Shows detailed info: format, file size, dimensions, and Base64 character count

Then click "Download Image" to save it to your device, or use the format selector to convert it to PNG, JPEG, or WebP before downloading.

Our Base64 Image Extractor supports all major image formats:

• PNG (image/png) — lossless, supports transparency
• JPEG (image/jpeg) — lossy, great for photos
• WebP (image/webp) — modern format with superior compression
• GIF (image/gif) — supports animation
• SVG (image/svg+xml) — vector graphics
• BMP (image/bmp) — uncompressed bitmap
• ICO (image/x-icon) — favicon format
• AVIF (image/avif) — next-gen format

You can also convert between formats (PNG, JPEG, WebP) using the format selector before downloading.

Yes! You can paste an image directly from your clipboard into the input area. For example:

• Take a screenshot and press Ctrl+V / Cmd+V in the textarea
• Copy an image from a webpage or document and paste it here
• Use the "Paste" button to trigger clipboard reading

The tool will automatically convert the pasted image into a Data URI, display the preview, and allow you to download it in your preferred format. You can also drag & drop image files or text files containing Data URIs onto the drop zone.

Common reasons why a Base64 image might fail to display:

• Incomplete string — the Base64 data may be truncated. Ensure you copied the entire Data URI.
• Missing prefix — the string must start with data:image/...;base64,. If you only have the raw Base64, try prepending data:image/png;base64,.
• Invalid characters — Base64 only uses A-Z, a-z, 0-9, +, /, and = (padding). Spaces or special characters will break decoding.
• Corrupted data — the original encoding may have been flawed, resulting in an unreadable image.
• Unsupported MIME type — for non-image Data URIs (e.g., PDF, audio), preview won't work, but you may still download the raw data.

Our tool provides clear error feedback to help you diagnose the issue.

Base64 encoding increases data size by approximately 33-37%. This is because Base64 converts every 3 bytes of binary data into 4 ASCII characters. The formula to estimate the original file size is: original_bytes ≈ (base64_length × 3) ÷ 4 (minus padding). Our tool displays both the Base64 character count and the estimated original file size so you can see the overhead. For large images, consider serving them as separate files rather than embedding as Base64 in your HTML or CSS.

Absolutely. All processing happens entirely in your browser using client-side JavaScript. No data is ever uploaded to any server. The Base64 string you paste, the image preview, and any format conversions are all handled locally on your device. Once you close the page, no trace remains. This makes the tool safe for processing confidential images, screenshots, or proprietary graphics without privacy concerns.

Base64 Data URIs are widely used in:

• HTML & CSS — embedding small icons, logos, or background images inline
• Email templates — avoiding external image blocking by email clients
• JSON APIs — transmitting images within API responses
• Single-page applications — bundling assets without extra HTTP requests
• Canvas exports — canvas.toDataURL() generates Base64 strings
• File uploads — some frameworks encode uploads as Base64 for transmission
• QR codes & barcodes — often encoded as Base64 for embedding