Bareun (Korean Spell Checker)
A Korean-made service that uses AI to correct spelling, spacing, and grammar in Korean text. Built by BAIKAL.AI, the same site also offers morphological analysis and a tokenizer. Proper nouns and technical terms can be registered in a user dictionary so the checker takes them into account.
How to try it
Paste your text into the source box on the spell-check tab and press the check button to see the corrections. The box shows a 500-character limit, so split longer texts. The service is in Korean, and some features such as the user dictionary may require signing in.