ThumbGlance is a free, MIT-licensed browser tool for YouTube creators. Preview one thumbnail and optional title in six illustrative layouts, or resize JPG, PNG and WebP images using exact dimensions, Fit padding and centered Fill cropping. Export JPG with adjustable quality or PNG with lossless encoding, and view the actual output file size. Image processing stays in the browser, with no image upload, account or saved history. The tool does not predict click-through rate or automatically judge readability. Source code and local running instructions: https://github.com/Ethereal49/thumbglance

Features

  • Local image processing; exact dimensions; Fit/Fill; JPG quality; PNG export

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Registered

2026-09-16
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