Zero Width Space Detector

Why detect before you remove

When debugging mysterious spacing, confirming U+200B is present saves guesswork. The detector report groups findings by character type so you know whether the issue is zero-width spaces, joiners, or another invisible code point.

Technical writers and developers often run detection on a failing string, screenshot the report for a ticket, then apply removal. Students can show a clean scan before submitting if an instructor questions formatting.

Blind removal without detection works, but you lose audit evidence. A report that lists character counts by type helps you explain to stakeholders why a string failed validation — especially in regulated industries where document provenance matters.

Detection also prevents over-cleaning. If your paste contains only one U+200B in a 5,000-word draft, you know the fix is surgical rather than rewriting entire sections. That precision matters when you are working under deadline and cannot afford to reformat a finished layout.

Quality-assurance teams embed a detect-then-clean step in content pipelines: scan a sample from each author, flag batches with nonzero counts, and route only contaminated files to remediation. The detector page is built for that report-first mindset.

Where zero-width spaces hide

Between words copied from ChatGPT answers. Inside hashtags or handles copied from social apps. In CSV cells exported from web tables. In localization strings pulled from a CMS. Each context benefits from a quick U+200B scan.

Detection is especially useful when only part of a document misbehaves — paste the suspect paragraph rather than the entire thesis.

Email signatures copied from mobile clients sometimes embed zero-width characters around phone numbers or tracking pixels. Marketing teams assembling newsletters from multiple contributors should scan each block before merging into the master template.

Code comments pasted from Stack Overflow or documentation sites carry the same risk as body copy. A single U+200B inside a constant string can break unit tests that compare against a clean fixture — detect the comment text before pasting it into your source file.

Multilingual content adds complexity: zero-width joiners (U+200D) and non-joiners (U+200C) appear in scripts where they serve real typographic roles. The detector distinguishes these from plain U+200B so you can decide whether removal is appropriate for each character class.

After detection

Copy the cleaned output from the same tool to strip detected characters. For bulk documents, repeat per section or sign in for longer scans.

If zero-width spaces are absent but formatting still fails, try the hidden-character checker or BOM remover for other invisible culprits.

Archive the detection report when filing bug tickets. Include the character counts and a before-and-after snippet so engineers can reproduce the issue without re-pasting from the original contaminated source.

Re-scan after cleaning to confirm zero findings. A second pass takes seconds and verifies that no U+200B survived in a nested paste or re-import from a cloud clipboard sync.

Can Word show zero-width spaces?

Word’s show/hide ¶ reveals ordinary spaces, not U+200B. An automated detector is more reliable.

Does the detector show positions?

The report lists character types and counts found in your paste. Copy cleaned text to eliminate them.

Will detection change my text?

Scanning is non-destructive until you copy the cleaned output. Your original paste stays in the input until you replace it.

Is U+200B always malicious?

No. Some systems use zero-width characters for legitimate typography. In AI paste workflows, they are usually unwanted artifacts.

Is this watermark checker free?

Yes. You can scan up to 500 words without an account. Sign in for longer documents, full cleaned text, and a character-level breakdown of every hidden marker removed.

Is my text stored when I use the checker?

We process your text only to return a detection report and cleaned output. We do not retain the content of your pasted text for any other purpose.