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Pattern Placeholder Replacer
Replace selected email-shaped, plus-phone-shaped and IPv4 tokens with consistent placeholders.
Pasted text, One UTF-8 text file
placeholder-text.txt, placeholder-report.json
Browser only
Runs locally in your browser. Your files, pasted content and generated output are not uploaded. Reset clears this tool’s working data.
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How to use this tool
- Enter the shown fields. A selected file takes precedence over pasted input, including an empty selected file.
- Replace selected patterns and inspect the complete result.
- Download placeholder-text.txt, placeholder-report.json.
Examples
Repeated alice@example.com values receive the same EMAIL placeholder.
Limitations
- Finite patterns cannot guarantee anonymity, complete sensitive-data removal or account validity. Unmatched sensitive text can remain.
- Plus-phone patterns contain 8–15 digits. Invalid maximal runs stay unchanged; overlong selected email or phone candidates refuse atomically.
- Up to 200,000 UTF-16 units, 1,000 records and 1,000 maximal candidates per selected pattern. Optional mapping contains exact originals.
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