Base64 to Image Decoder and Viewer
Decode a Base64 string or data URI back to an image in your browser. Live previe...Decode a Base64 string or data URI back to an image in your browser. Live preview, automatic format detection, exact size and dimensions, and one-clic...
Updated
Quick answer
To convert Base64 to an image, paste the Base64 string or the full data:image/...;base64, URI into the box and the image is decoded in your browser and previewed instantly. YaliKit reads the format from the data URI mime type, or sniffs the magic bytes when you paste raw Base64, so PNG, JPEG, GIF, WebP, BMP, and SVG are detected automatically and the download gets the correct extension. Nothing is uploaded, since decoding uses the browser's built-in atob function locally.
Features
Why Use Base64 to Image Decoder and Viewer?
Live Preview as You Paste
The decoded image appears the instant you paste, so you can verify it is the right picture before you save anything. No decode button to hunt for.
Automatic Format Detection
The tool reads the data URI mime type or sniffs the magic bytes (PNG, JPEG, GIF, WebP, BMP, SVG) so the format is identified for you and the download gets the correct extension.
Format, Size, and Dimensions
See the detected format, the decoded byte size, and the exact pixel width and height read from the image itself, so you know precisely what you decoded.
Prefix Optional
Paste a raw Base64 string or a full data:image/png;base64,... URI. Whitespace and line breaks are stripped and both forms work without any cleanup.
Nothing Uploaded
Decoding runs entirely in your browser with the built-in atob decoder. Your Base64 never leaves your device and the tool keeps working offline.
Download or Copy
Save the decoded image with the right file extension, or copy the full data URI to your clipboard to embed inline in HTML, CSS, or JSON.
Common Uses
Development
View and save an image returned as Base64 by an API or logged in code.
Email Images
Extract a picture embedded as a Base64 data URI inside an HTML email.
Database Fields
Recover images stored as Base64 text in a database column.
Config and JSON
Pull an inline image out of a JSON config or an API response payload.
How It Works
Paste Your Base64
Paste a Base64 string or a full data URI into the box. It can include the data:image/...;base64, prefix or be the raw Base64 on its own. Line breaks are fine.
Preview and Check the Details
The image renders instantly. The panel shows the detected format, the decoded byte size, and the pixel dimensions so you can confirm the result.
Download or Copy
Download the image with the correct extension for its detected format, or copy the data URI to paste elsewhere. Everything happens in your browser.
Pro Tips
Paste With or Without the Prefix
Both a bare Base64 string and a full data:image/png;base64,... URI work. When the prefix is missing, the format is detected from the decoded bytes automatically.
Check the Dimensions
The pixel width and height are read from the decoded image itself, which is a fast way to confirm you have the full-resolution picture and not a truncated copy.
Watch for Truncated Strings
If you get an error, the Base64 was most likely cut off when copied. Copy the entire string, including any trailing equals sign padding, and paste it again.