The Ultimate Guide to Redacting Sensitive Data & API Keys in Screenshots
How to mask customer PII, credit cards, and tokens before sharing bug reports in Slack, Jira, and GitHub.
To safely redact sensitive data in screenshots: use pixelation shaders or high-blur gaussian filters rather than black marker boxes (which can sometimes be reversed if opacity is <100%). ClickSnap provides built-in brush blur and rectangle pixelation that flattens destructive pixels directly on the canvas.
The Danger of Incomplete Redaction
Every year, thousands of API keys (sk_live_...), Stripe tokens, and user credentials leak into public GitHub issue trackers because engineers use low-opacity black pen highlighters that can be brightened in photo editors to reveal underlying text.
How to Redact Properly in ClickSnap
- Rectangle Pixelate Tool: Select the Pixelate Blur tool (
X) and draw a box over the sensitive area. The shader averages pixel blocks irreversibly. - Brush Blur Tool: Use the Brush Blur tool (
B) to paint over irregular elements like profile photos or signatures. - Canvas Flattening: When exporting, ClickSnap permanently rasterizes the blurred pixels into the PNG/JPG buffer, ensuring underlying data cannot be extracted.
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