Safe Habits for Handling Input Data on Tool Sites: Local Processing, Sharing Links, Sensitive Info

This article shares general privacy/security habits. Treat important data conservatively.

1) Why “local processing” still needs caution

Even when processing happens in the browser, factors like ads/analytics scripts, browser extensions, shared links, and screen captures can matter.

2) Avoid sensitive information by default

• Government IDs, bank/card numbers, passports/licenses
• Health, religion, political opinions, and other sensitive categories
• Confidential internal documents

If you must use such data, consider masking/redacting it before input/upload.

3) Checklist for sharing QR links

• Verify the destination URL before generating/printing the QR
• Minimize tracking parameters unless truly necessary
• Provide a fallback (short URL next to the QR)

4) Checklist for files

• Prefer files with sensitive data removed
• Manage/delete originals safely after use
• Avoid public computers/networks when possible

5) The simplest three habits

• Don’t input sensitive info
• Re-check shared links (especially QR destinations)
• Prefer services with clear policy/contact pages