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How-to
Blur sensitive information automatically
What Thoth looks for, how it reads your screen to find it, how to switch kinds on and off, and what can still slip through.
- Plan
- Pro
- Reading time
- 2 min read
- Checked against Thoth for Windows on
- October 23, 2026
Turn it on once and Thoth blurs private details in new screenshots as you record, and can scan a screenshot you already have. All of it runs on your computer.
Turn it on#
- 1
Open Privacy
Go to Settings → Privacy and switch on Blur sensitive info automatically.
- 2
Choose what to look for
Tick the kinds you want: Email addresses, Phone numbers, Payment card numbers, US Social Security numbers, API keys and tokens, and IP addresses (off by default).
- 3
Keep Blur password fields on
It covers password boxes you click or type into, even when they only show dots.
How it finds things#
- Each new screenshot is read with Windows’ built-in text recognition. Thoth reads it several times at different sizes, because small or odd type is the main reason text gets missed.
- While you record, Thoth also reads the visible text of the window you’re working in. That catches values the picture can’t show clearly, such as a long card number with no gaps. Password fields are never read.
- It then looks for the patterns above: emails, phone numbers, card numbers that pass a check-digit test, Social Security numbers, key and token shapes, and IP addresses.
- Matches are blurred; the text itself is checked and thrown away, never saved.
Scan a screenshot you already have#
Choose Find and blur sensitive info from a step’s image menu, or Find and hide sensitive info in the screenshot editor’s panel. Thoth reads that screenshot and adds blurs where it finds matches, and tells you how many. You can remove any of them.
Do
- Use sample data when you can, and turn on automatic blurring as a second layer.
- Switch on IP addresses if your guides show internal networks.
- Re-scan after you replace a screenshot.
Don’t
- Treat it as a guarantee. It’s a safety net for you to check.
- Share a guide you haven’t looked at since the last re-record.