jquery - Bootstrap 3 Embed Image size based on device resolution -

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i'm new bootstrap 3 , building personal website it. want include email on website, not in plain text, protect against spambots. thought embedding image reasonable, unfortunately looks blurry on iphone.

here image

email image

i'm thinking few solutions:

  1. embed 2x version of image , scale half size based on device ppi (pixels per inch)
  2. decide load either 1x , 2x version of image based on device ppi
  3. hope spambots don't care , leave email in plain text

what can gracefully size image high-resolution screens?

use svg image format scales nicely on retina displays


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