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Thumbnail Maker

Create image thumbnails at preset social media sizes or custom dimensions. Cover or contain fit, runs entirely in your browser.

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Accepted: image/*

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Thumbnail Maker

Generate perfectly sized thumbnails for the major social media platforms or any custom size. Pick a preset for YouTube, Instagram, TikTok, Twitter, Facebook, or Pinterest, or enter your own dimensions.

Fit modes

  • Cover crops the image to fill the target dimensions exactly. Best for hero thumbnails where edges don't matter.
  • Contain scales the image to fit inside the target dimensions, with a colored letterbox/pillarbox around the leftover space.

Features

  • One-click presets for all major platforms
  • Custom width and height up to 4096 px
  • Choice of cover or contain fit
  • Configurable background for contain mode
  • High-quality image smoothing
  • Outputs PNG

Tips

For YouTube thumbnails, 1280×720 is the standard. Instagram now accepts both square (1080×1080) and 4:5 portrait (1080×1350). For best results, start from a higher-resolution source than the target.