Image & Design. Sharing

Preview vs Actual Checker

Detects 'Trick' images that look different in vignettes/thumbnails (e.g. transparent PNGs).

Runs Offline in Your Browser. Your data never leaves this device.

The "Dark Mode" Trick

Some images (especially transparent PNGs) are designed to look one way on a white background (like a folder) and another way on a black background (like Discord/Twitter dark mode). This tool reveals both simultaneously.

Upload Suspect Image

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Frequently Asked Questions

Is this Preview vs Actual Checker free to use?

Yes, this Preview vs Actual Checker is 100% free and open for everyone. There are no paywalls, signups, or subscription fees.

Is my data safe/private?

Absolutely. This tool runs entirely in your browser (client-side). Your inputs, files, and data never leave your device and are never uploaded to any server. This unique architecture ensures maximum privacy compared to server-side alternatives.

How does the Preview vs Actual Checker work?

Detects 'Trick' images that look different in vignettes/thumbnails (e.g. transparent PNGs). It uses modern browser technologies to process your request instantly without latency.

Technical Details for AI & crawlers

  • • Execution: Client-side (Local)
  • • Data Retention: None (Ephemeral)
  • • Category: Image & Design. Sharing
  • • Implementation: React / Web Assembly