'Love conquers all' rendered as a nine-character sentence with a military verb.

What a Japanese person actually thinks
Reads like a machine-translated sentence, because the structure is pure English with Japanese particles bolted on. The 征服 makes it faintly alarming.

Meaning

Literally: love + (topic) + everything + (object) + conquers
Actually: A textbook-perfect translation. 征服 is the verb for military conquest — subjugating a territory. Applied to love it sounds less romantic than it does imperial.

Scores

Naturalness●●●●●

Grammatically correct, idiomatically absent. Nobody would ever write this.

Coolness●●●●●

Nine characters. It's a sentence, not an inscription, and it's a translated one.

Watch out

high征服 is the word used for conquering nations and colonising territory. It is not a romantic verb in Japanese.

Get this instead

縁 en
the fated thread between people

One character carrying the idea that some connections were always going to happen. Infinitely better than a translated slogan.
愛は強し ai wa tsuyoshi
love is strong

If it must be a statement about love's power, this classical phrasing at least sounds Japanese.

On skin

愛は全てを征服する

Orientation: vertical

N/A — change the words.