Joiners, selectors and fillers
HANGUL JAMO FILLERS (U+115F-U+1160)
Two zero-width fillers, U+115F HANGUL CHOSEONG FILLER and U+1160 HANGUL JUNGSEONG FILLER, that stand in for a missing initial consonant or medial vowel when a Korean syllable block is written out in jamo. In everyday terms they are the choseong filler and the jungseong filler.
- Range
U+115F-U+1160- Also written as
u115f-u1160- Category
- Joiners, selectors and fillers
- Removed by default
- When free-floating
- Governing option
- Aggressive
-a - Can be load-bearing
- Yes
Copy and paste U+115F
To copy and paste HANGUL CHOSEONG FILLER (U+115F), press the button: the character itself goes to your clipboard, and Ctrl+V (Cmd+V on a Mac) pastes it anywhere you can type.
This page covers a whole block, so the button copies one character from it: HANGUL CHOSEONG FILLER (U+115F).
Where it comes from
Korean text encoded as conjoining jamo rather than as precomposed syllables: linguistic material, some IMEs, and older data. The choseong filler (U+115F) holds the leading consonant slot of a block that has none, the jungseong filler (U+1160) holds the vowel slot, and both travel with the text as soon as it is copied out as bare jamo.
Why it matters
They are invisible and they sit inside words, so they break search and comparison for Korean exactly the way a zero width space does for English.
Before and after
A jamo filler surrounded by Latin letters: there is no syllable block for it to complete.
The character is shown as a labelled chip so you can see where it sits. In your text it draws nothing at all.
When it is legitimate
Inside a jamo sequence, next to other Hangul jamo.
How to remove it
Removed by the default pass unless the previous kept character is a Hangul jamo; `-a` removes them there as well.
Working in a file rather than a paste? The document report for .docx, .odt and .html finds it inside the file, together with hidden runs and tracked changes, without you having to open it. If the question is what the rest of the writing does rather than what this one character does, measure sentence-length variation and see where each habit sits, with no score and no claim about who wrote the text.
Is it an AI watermark?
Not a watermark
No. These are Korean script mechanics. U+3164 HANGUL FILLER, the one behind blank usernames, is a different, compatibility character that is always removed.
No connection to machine-generated text. It comes from software, from a keyboard, or from a person.
Questions
What is U+115F HANGUL CHOSEONG FILLER?
It is the choseong filler: the placeholder that occupies the leading consonant slot of a Korean syllable block that does not have one. Inside a jamo sequence it is legitimate, so the default pass keeps it when the previous kept character is a Hangul jamo and removes it anywhere else; `-a` removes it in both positions.
What is U+1160 HANGUL JUNGSEONG FILLER?
It is the jungseong filler, the same idea for the medial vowel slot: it holds the place of a vowel the block does not have. It is treated exactly like U+115F, kept next to other Hangul jamo, removed by the default pass in any other position, and removed by `-a` in both.
How do these differ from U+3164?
U+115F and U+1160 are conjoining jamo used inside a syllable block and are kept next to other jamo. U+3164 HANGUL FILLER has no such role: it is the compatibility character behind blank usernames and blank messages, it is always removed, and it has a page of its own here.
Check your own text
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