Copy an invisible character for a blank comment or invisible comment. Paste it into the comment field and test whether the platform accepts it.
The most common choice is Hangul Filler (U+3164) because it looks empty but often still counts as text. If it does not work on your platform, try another Unicode character from the main blank text tool.
Different apps prefer different Unicode characters. Start with these combinations.
Best first choice: Hangul Filler (U+3164). Alternatives: Zero Width Space and No-Break Space.
Best first choice: Hangul Filler. Alternative for tighter formatting: Zero Width Space.
Start with Hangul Filler. If the game rejects it, try Space or No-Break Space.
Use No-Break Space for preventing line breaks, EN Space and EM Space for wider spacing, and Thin Space or Hair Space for finer adjustments. For code-ready values and conversion, see HTML Space Characters.
Explore the most useful guides on BlankText.Net for blank messages, Instagram, gaming nicknames, and Unicode spaces.