Thumbnail Preview & Compare guide

Compare thumbnails and titles in realistic mobile and desktop previews.

Use the guide alongside the working tool.

Compare one deliberate change

Variant A: close-up subject + short headline
Title A: Three ways to improve your desk setup
Variant B: wider room photo + the same headline
Title B: Three ways to improve your desk setup

Keeping the title constant helps you judge subject scale and clarity without changing several variables at once. This is a visual review, not an audience experiment or a performance forecast.

Create and export

Add two to four thumbnail images and give each variant a title. Inspect the 16:9 crop and keep important text away from edges.

Switch between compact mobile and wider desktop feed contexts. Compare the combination of image, title, contrast and subject size at the actual preview scale.

Export the comparison to discuss or review your variants. These are simulated feeds; the tool does not connect to your channel or predict click-through rates.

Methods and limits

Compare 2–4 manually supplied images and titles. Feed previews are simulations, not platform screenshots or CTR predictions. Images are cropped to 16:9 in previews. No account access or performance data is fetched.

Local processing

Files and inputs stay in browser memory. Only the shared media engine is downloaded when needed; no media is uploaded. Exported files contain the content you select. Refreshing clears this workspace.

Ready to apply this workflow?

Try Thumbnail Preview & Compare →

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Keep your original files and review the result. Found unclear instructions? Contact Team Edtoolkits.