Base64 FAQ

Is Base64 encryption?

No. Base64 is a reversible representation of data and does not require a secret key. Do not use it to protect passwords or sensitive information.

Are images uploaded to a server?

The image conversion control reads one selected file with FileReader in your browser. It does not upload the image for this conversion. The site also uses third-party advertising and analytics; see the privacy policy.

Is there a 1 MB limit or batch upload?

The current image picker accepts one file at a time and has no explicit 1 MB check. Practical limits depend on your browser and device memory. Large files may make the page slow.

Why is decoded text incorrect?

Check that the input is complete Base64, that the character set matches the original data and that symbol replacement settings agree. For an image Data URL, the prefix is not part of the Base64 payload. Decoded binary data may not be readable text.