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Add an animated signature to Spark

Spark has an HTML mode for signatures on Mac, Windows and iPhone. Readdle’s help page documents no HTML option for Android.

Mac and Windows

  1. Design your signature on BylineSig, then click Copy HTML.
  2. Open Spark Settings, then Composer, then Signatures.
  3. Click Create Signature.
  4. Click HTML at the bottom right and paste the HTML.
  5. Click Save, then set it under Default Signature for your account.

iPhone and iPad

  1. Copy the HTML from BylineSig on the device, or send it to yourself and copy it there.
  2. In Spark, open the menu, then Settings, then Signatures. Make sure Use Email Signatures is on.
  3. Tap Add Signature, tap HTML at the top right and paste.
  4. Use Default for to assign it to an account.

These steps follow Spark Help: Manage email signatures, last checked October 2026. Menus move; if yours looks different, tell us at [email protected] and we will fix the guide.

Don't have a signature yet?Design one — free