The reverse of Image to Base64: paste a data URI you got from an API response, an HTML source, or a JSON config, and download the decoded image. Handles both base64 and URL-encoded (SVG) formats. Detects the MIME type from the data URI prefix; falls back to auto-detection from magic bytes if the prefix is missing.
Input formats
Accepts standard data URIs (data:image/png;base64,…), URL-encoded SVG data URIs (data:image/svg+xml,…), and bare base64 (with a format hint). Also accepts a full JSON object with base64 as a field — the tool extracts the string automatically.
Output format detection
MIME type comes from the data URI prefix when present. Otherwise the tool sniffs the first 12 bytes of the decoded data to identify JPEG, PNG, GIF, WebP, AVIF, or SVG. Unknown formats download as .bin for you to inspect.
Batch decoding
Paste a JSON array or object of data URIs and the tool decodes every entry, producing a ZIP with each image named by its key.