If someone lost their seed can use their seed hex to restore their seed ,or if someone want to get their seed as hex can use this site is a online pgp word list converter https://warrenguy.me/projects/pgp-word-list-converter Be careful if someone have access to your hex can access to your seed "can steal your coins"
I would not recommend this. First of all, you would not get the correct result. The wordlist seed encoding has an extra word at the end for a checksum. The hex encoding does not. You should also never enter your seed into a website such as this. Seeds must remain private in order to protect the coins sent to addresses derived from the seed. If this website is creating the result for you server side, you have given your seed to a third party and your coins are not safe. I didn't examine the site in detail, but based on the page source, I don't see any of the words from the actual word list in a script. This does not inspire confidence.
As an alternative, I'd recommend using davec's tool to do the conversion locally on your computer: https://github.com/davecgh/dcrseedhextowords
How long will it take until someone will post www.dcrseedhex2words.com, only with the best intentions of course In the big picture it won't hurt DCR (contrary to the victim unfortunately) if thieves think it is worthwhile to steal. It just shows everyone how valuable it is. Wait until the first big DCR theft will happen and make the news and then watch the price skyrocket afterwards. It's all human nature. Edit: The editor will automatically place a link when something with www is posted and even though I click unlink later it won't get removed. Bug? I have now just pointed to nothing.
dcrwallet accepts hex or pgpword list seeds (and has for a really long time). No need to convert (and definitely never use a website to convert).