Move the mouse to generate randomness. 0% done. Main page here.
Your seeds will appear after sufficient mouse movement
Your receiving addresses will appear after sufficient mouse movement
If you would like to decode the mnemonic words for a seed, enter them at the bottom of the main iotaseed.io page
A seed represented as random words is safe. Such a seed is just as difficult to guess for a brute-force attacker as the fully random 81 character IOTA seed it is derived from (uppercase alphabet + 9, see here). Also, because the brain builds a story to make sense of oddly jutaxposed words, they are much easier to remember (and to write down). The excellent Electrum bitcoin client uses mnemonic words as well.