Test Your Text
Test and validate your invisible text
If you see squares or question marks, try a different character from the library.
An invisible text compatibility tester lets you paste zero-width characters such as ZWSP, Hangul Filler, Braille Blank, and direction marks to confirm how many characters survive platform sanitizers. Messaging apps, social networks, and games increasingly block ordinary whitespace, so this tester surfaces replacement symbols before you publish blank usernames, DMs, or QA payloads.
Detects zero-width, spacing, and filler Unicode code points that appear blank to humans but count as text.
Highlights replacement glyphs (�) whenever a platform strips or rewrites your payload so you can react early.
Mirrors the quirks of WhatsApp, Instagram, Discord, TikTok, and Roblox so you know which characters they accept.
Suggests alternative characters such as Hangul Filler (U+3164) or Braille Pattern Blank (U+2800) when your first attempt fails.
Stores the latest test history locally so regression checks stay fast without sending data to any server.
Paste or type your string
Copy any blank text snippet, long-press on mobile, or press Ctrl/Cmd + V to drop it into the tester; the character count updates in real time.
Read the analyzer status
Watch the status banner to see whether the payload stays intact or if replacement icons warn that a platform may reject it.
Copy the clean output
Use the copy button to grab vetted invisible text so you can reuse it in WhatsApp chats, Discord servers, or QA test cases.
Review saved scenarios
Scroll through the recent tests list to reuse past payloads, compare character counts, and clear the log whenever you start a new experiment.
Blank Messages & Status Checks
Ensure that Hangul Filler or zero-width spaces still bypass WhatsApp’s empty-message filter before you send dramatic pauses or minimalist status updates.
Paste Hangul Filler (U+3164), confirm no replacement glyph appears, then reuse it in WhatsApp Web or mobile.
Real-time Analyzer
The character counter and status messaging update instantly while you type or paste, so you notice sanitizer issues immediately.
Replacement Alerts
Visual warnings and badges highlight when hidden text has been altered, reducing the risk of failed submissions.
One-click Copy
Copy validated invisible text in a single tap for quick reuse across messaging apps, docs, or QA scripts.
Local History Log
The last ten tests stay on your device, letting you revisit previous payloads without rebuilding them from scratch.
Privacy First
All analysis happens in the browser, so no invisible text ever leaves your machine.
Workflow Ready
Pair the tester with the character library or batch generator to move seamlessly from research to deployment.
💡Retest After App Updates
Meta, Discord, and Roblox frequently adjust anti-spam filters. Run a quick regression in the tester after major releases.
💡Mix Character Families
If ZWSP fails, blend in Hangul Filler, NBSP, or Braille blanks to discover combos that bypass the latest filter.
💡Log Test Notes
Copy the status text into your QA ticket or screenshot the analyzer output so teammates know which Unicode points were used.
💡Pair With Device Testing
Results can differ between Android, iOS, and desktop clients. Validate on the devices your audience uses most.
Why do I see the � symbol after testing?
Replacement glyphs mean the target platform stripped or substituted your characters. Try switching to Hangul Filler, Braille blanks, or no-break spaces until the tester shows a clean status.
Which invisible character stays reliable on WhatsApp?
Hangul Filler (U+3164) currently survives WhatsApp’s filters on both mobile and web, while plain ZWSP is often blocked. Always validate again before big launches.
Is using invisible text allowed?
Most platforms permit invisible characters for formatting, accessibility, and testing, but using them to hide keywords or impersonate users can violate the terms of service. Use this tool responsibly.
How often should I retest blank strings?
Retest whenever an app updates, you switch devices, or a moderation bot changes behavior. Maintaining a quick regression log inside the tool makes this painless.
Batch Invisible Text Generator
Spin up 1–500 zero-width characters or Hangul fillers to feed directly into the tester.
Invisible Character Library
Browse every supported blank character with Unicode, HTML, width, and usage notes before testing.
Bold Text Generator
Blend invisible spacing with stylized fonts for bios and callouts.