How it works
Encoding
Open or drop one or more images and each becomes a data URI of the form data:image/png;base64,… with its original bytes, so the picture is unchanged. Base64 writes every 3 bytes as 4 characters, so the text is about a third larger than the file.
Each image has three copy buttons: raw Base64 without the prefix, the full data URI, and a ready-made CSS background-image rule.
characters = ceil(bytes / 3) × 4
Limits
Files over 5 MB are skipped with a message, because a data URI that long freezes most text fields. Files that are not images are skipped too. The rest still encode.
