How It Works Under the Hood
Column headers and sample cells are scanned heuristically (with Luhn checksum verification for payment card numbers) to apply consistent salted pseudonyms, partial masks, synthetic fakes, or [REDACTED] placeholders locally.
Step-by-Step Instructions
Switch between CSV Table mode or Raw Server Log mode and paste or upload your file.
Customize per-column strategy (Mask, Consistent Hash, Synthetic Fake, Redact, or Keep) or toggle log patterns.
Copy or download your sanitized file safely for external vendors or LLM debugging.
Key Features & Performance
- Consistent Salted Pseudonymization: Same customer email maps to the same anonymous ID across rows
- Luhn-Verified Card Guard: Avoids accidentally redacting timestamps as credit card numbers
- API Secret & JWT Detection: Strips Bearer tokens, OpenAI keys, AWS keys, and JWTs from stack traces
- Zero Uploads: Sensitive production data never crosses the network
Local Browser Processing & Privacy
Traditional web converters upload your documents, snippets, or media files to remote servers. CSV & Log PII Data Anonymizer runs inside your browser tab:
Your input text and files are processed locally without uploading payloads to a processing server.
Microdeck does not log or store the files or inputs you paste into tool workspaces (normal static hosting/CDN requests still load page assets).
Working outputs stay in your browser tab and are released when you reset the tool or close the tab.
Frequently Asked Questions
Why use Consistent Hash instead of [REDACTED]?
Consistent hashing preserves join keys and cohort grouping (e.g., seeing the same user repeated in an error log) without revealing their real email or IP address.
Can anyone reverse the hashed token back to the original email?
No without brute-forcing against your private custom salt. Pick a unique per-project hash salt for strong pseudonymization.
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