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Editorial Team
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Asked: 2026-05-18T20:24:38+00:00

I’m looking for a (ideally self-hosted) service that lets me do something like <img

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I’m looking for a (ideally self-hosted) service that lets me do something like

<img src="http://image-resizer.domain.com/resize-image/150/100/path/to/image.jpg" />

This service would:

  • download http://mydomain.com/path/to/image.jpg (if it hadn’t before)
  • resize it to 150×100
  • strip / squash the thumbnail of metadata (and whatever else is good for thumbnails)
  • cache the thumbnail (to disk, or maybe to s3?)
  • serve it to the client
  • on subsequent requests for that URL, serve the same cached thumbnail

This would allow me

  • only have the original image on my site and outsource the thumbnail generation to another service
  • allow me to easily create new thumbnail sizes
  • should be efficient

Does something like that exist? Would prefer open source, and hopefully either in Ruby or Node.js.

Bonus points for working on a limited amount of diskspace (i.e. so it would only cache, say, 5GB of images).

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1 Answer

  1. Editorial Team

    I found Dragonfly: https://github.com/markevans/dragonfly

    “An on-the-fly processing/encoding framework written as a Rack application.”

    It’s close to what I was looking for, but I’d prefer something totally separate. Dragonfly looks like it needs to be embedded in your Rails application as a Rack app. (Not an option for me, since I’m still on Rails 2.2)

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