Hangul Filler
U+3164Blank-looking special character
Chat box Unicode tester
Prepare a short sample for live chat boxes, group chats, DMs, channels, threads, support widgets, or game chat fields.
U+3164Blank-looking special character
U+00A0Visible spacing character
U+200BZero-width or format character
U+2003Visible spacing character
Use this page to test how a chat app handles invisible Unicode inside ongoing conversations, group chats, DMs, or server channels. It is a live-conversation field diagnostic, not a one-message test.
Chat apps apply server rules, rate limits, moderation filters, and client-specific rendering on top of basic message handling. That is why this page is separate from the single-message test.
Hangul Filler is useful when a chat field needs a blank-looking unit with presence. No-Break Space is better for spacing near visible text. Zero Width Space is useful for no-width tests but may be removed by chat systems that validate message payloads.
Discord, Messenger, Telegram, WhatsApp, Slack-style apps, and game chats can normalize or reject invisible Unicode. Group and server rules may be stricter than private chats. Chat preview, send state, and message-edit behavior can all differ from what the Test Box shows.
Start from the homepage copy tool for general invisible characters. Compare invisible message text, blank text message, Discord chat text, WhatsApp invisible text, and empty message testing.
Use invisible chat text for harmless formatting and Unicode testing. Avoid spam, flooding, harassment, evasion, moderation bypass, or disruptive chat behavior.