Text Masking Tool
Mask passwords, IDs and sensitive strings with asterisks in one click — perfect for sharing screenshots and bug reports.
What is Text Masking Tool?
You need to share a log or screenshot that contains a password or API key. Manually blacking out characters is slow and easy to miss.
Paste the sensitive string, choose what to mask, and get safe-to-share output.
If you're filing bug reports, you mask credentials in stack traces. If you're recording demos, you hide test API keys. If you're sharing in Slack, you redact customer IDs without losing context.
How to use Text Masking Tool
Four steps. No setup, no signup.
Step 1
Paste your log line or sensitive record
Step 2
Choose the visible/masked ranges
Step 3
See the masked output instantly
Step 4
Hit Copy and share safely
Example
Credit card with last 4 visible.
Input
4111 2222 3333 4444
Output
**** **** **** 4444
Why Text Masking Tool is useful
- ✓
Hide credentials and IDs in screenshots before sharing.
- ✓
Preserve string length so log line widths stay aligned.
- ✓
Pick asterisks, X or any single character as the mask.
- ✓
Show the last 4 digits for credit-card-style receipts.
Common questions
Can I keep the last 4 digits visible?
Yes, most presets show the last 4 like a credit card receipt.
Tip: Standard format: **** **** **** 1234.
Does it preserve string length?
Yes, masking is character-for-character so widths stay identical.
Tip: Critical for fixed-width log lines.
Does it auto-detect passwords?
No, you choose what to mask manually.
Tip: Use Text Redaction for pattern-based auto-detection.
Can I use X or # instead of asterisks?
Yes, swap to any single character.
Tip: Some teams reserve * for wildcards and use X for masks.
Last reviewed: April 2026 · Free, browser-based, no signup.
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