Do I need the data URI prefix?

No. A full data:image/png;base64,... URI works, and so does a bare Base64 payload — in that case the image type is sniffed from the decoded bytes (PNG, JPEG, GIF, WebP or BMP).

What if my Base64 has line breaks or spaces?

Whitespace and newlines are stripped automatically before decoding, so Base64 copied from emails, certificates or code wraps decodes cleanly.

Is my image uploaded anywhere?

No. Decoding uses the browser's built-in atob and Blob APIs entirely on your device — the data is never sent to a server or stored.

Base64 to Image — Gera Tools

Decode Base64 back into an image

Paste a Base64 string — either a bare payload or a full data: URI — and get the image back, ready to view and download. The type is read from the data URI when present, or sniffed from the decoded bytes for PNG, JPEG, GIF, WebP and BMP.

Whitespace and line breaks are stripped automatically, so Base64 lifted from code, emails or certificates decodes cleanly. Everything happens in your browser with the built-in atob and Blob APIs — nothing is uploaded.