This tool started as a base64 decoder. When trying to fix a problem with the javascript atob function's unicode handling this oddity came up, and it was too interesting to throw away. It's similar to the "bush hid the facts" Notepad bug. Not all Base64 inputs work; I'm not sure why.


A Base64 sample you could try:

QVNUUk9OT01ZIChmcm9tIEdyLiDhvITPg8+Ez4HOv869LCBhIHN0YXIsIGFuZCDOvc6tzrzOtc65 zr0sIHRvIGNsYXNzaWZ5IG9yIGFycmFuZ2UpLiBUaGUgc3ViamVjdCBtYXR0ZXIgb2YgYXN0cm9u b21pY2FsIHNjaWVuY2UsIGNvbnNpZGVyZWQgaW4gaXRzIHdpZGVzdCByYW5nZSwgY29tcHJlaGVu ZHMgYWxsIHRoZSBtYXR0ZXIgb2YgdGhlIHVuaXZlcnNlIHdoaWNoIGxpZXMgb3V0c2lkZSB0aGUg bGltaXQgb2YgdGhlIGVhcnRo4oCZcyBhdG1vc3BoZXJlLiBUaGUgc2VlbWluZyBhbm9tYWx5IG9m IGNsYXNzaWZ5aW5nIGFzIGEgc2luZ2xlIGJyYW5jaCBvZiBzY2llbmNlIGFsbCB0aGF0IHdlIGtu b3cgaW4gYSBmaWVsZCBzbyB3aWRlLCB3aGlsZSBzdWJkaXZpZGluZyBvdXIga25vd2xlZGdlIG9m IHRoaW5ncyBvbiBvdXIgb3duIHBsYW5ldCBpbnRvIGFuIGluZGVmaW5pdGUgbnVtYmVyIG9mIHNl cGFyYXRlIHNjaWVuY2VzLCBmaW5kcyBpdHMgZXhwbGFuYXRpb24gaW4gdGhlIGltcG9zc2liaWxp dHkgb2Ygc3ViamVjdGluZyB0aGUgbWF0dGVyIG9mIHRoZSBoZWF2ZW5zIHRvIHRoYXQgZXhwZXJp bWVudGFsIHNjcnV0aW55IHdoaWNoIHlpZWxkcyBzdWNoIHJpY2ggcmVzdWx0cyB3aGVuIGFwcGxp ZWQgdG8gbWF0dGVyIHdoaWNoIHdlIGNhbiBoYW5kbGUgYXQgd2lsbC4gQXN0cm9ub215IGlzIG9m IG5lY2Vzc2l0eSBhIHNjaWVuY2Ugb2Ygb2JzZXJ2YXRpb24gaW4gdGhlIHB1cnN1aXQgb2Ygd2hp Y2ggZXhwZXJpbWVudCBjYW4gZGlyZWN0bHkgcGxheSBubyBwYXJ0LiBJdCBpcyB0aGUgbW9zdCBh bmNpZW50IG9mIHRoZSBzY2llbmNlcyBiZWNhdXNlLCBiZWZvcmUgdGhlIGVyYSBvZiBleHBlcmlt ZW50LCBpdCB3YXMgdGhlIGJyYW5jaCBvZiBrbm93bGVkZ2Ugd2hpY2ggY291bGQgYmUgbW9zdCBl YXNpbHkgc3lzdGVtYXRpemVkLCB3aGlsZSB0aGUgcmVsYXRpb25zIG9mIGl0cyBwaGVub21lbmEg dG8gZGF5IGFuZCBuaWdodCwgdGltZXMgYW5kIHNlYXNvbnMsIG1hZGUgc29tZSBrbm93bGVkZ2Ug b2YgdGhlIHN1YmplY3QgYSBuZWNlc3NpdHkgb2Ygc29jaWFsIGxpZmUuIEluIHJlY2VudCB0aW1l cyBpdCBpcyBhbW9uZyB0aGUgbW9yZSBwcm9ncmVzc2l2ZSBvZiB0aGUgc2NpZW5jZXMsIGJlY2F1 c2UgdGhlIG5ldyBhbmQgaW1wcm92ZWQgbWV0aG9kcyBvZiByZXNlYXJjaCBub3cgYXQgY29tbWFu ZCBoYXZlIGZvdW5kIGluIGl0cyBjdWx0aXZhdGlvbiBhIGZpZWxkIG9mIHByYWN0aWNhbGx5IHVu bGltaXRlZCBleHRlbnQsIGluIHdoaWNoIHRoZSBsaW5lcyBvZiByZXNlYXJjaCBtYXkgdWx0aW1h dGVseSBsZWFkIHRvIGEgY29tcHJlaGVuc2lvbiBvZiB0aGUgdW5pdmVyc2UgaW1wb3NzaWJsZSBv ZiBhdHRhaW5tZW50IGJlZm9yZSBvdXIgdGltZS4K