Encode
First, encode the file by either uploading it or pasting its source into the appropriate one of the fields below; click 'generate'; then right click the result, copy link target, and paste into the textbox beneath it.CHECK THE BASE64 BOX IF IT IS NOT CHECKED.
If you do not choose to upload your file, but intead insist on pasting the source, more power to you: You must already know to make sure the MIME-type is correct or your file may not render correctly, if at all.
For a note on MIME-types, see footer.
Right-click the above result and copy it, then paste it into text area below.
Then download the files below by clicking on them.
Decode
First, save a copy of this page to a folder into which you also have saved your downloaded attachments.It is important that they are in the same folder!
Make sure they are still called "Part1" "Part2" etc.
Then click on the button below and download your concatenated file.
(You will have to dispose of the pieces of your file yourself.)
Then download the reassembled file below by clicking on it, and saving it from the instance that opens in a new tab.
You can paste plain text into the larger text box by highlighting all the text that is there and replacing it -- but you have to change the mime-type in the smaller text box above it from "text/html" to "text/plain."
Any other kind of file you paste you have to paste the plain text of the file, not the file as rendered: the raw email, the PDF opened with a sinple text editor, the PDF weirdness that looks like a fonteater threw up after drinking an exotic font smoothie too fast.
A non comprehensive list of mime types is below.