Edge changes case of URL in Top Sites

Won’t fix Issue #17250991


David B.
Apr 27, 2018
This issue is public.
Found in
  • Microsoft Edge
Found in build #
Reported by 2 people

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Steps to reproduce

If I create a top site in EDGE using the URL
all the upper case characters are converted to lower case and the URL no longer works


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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Steven K.”

    • Hi David,

      I want to make sure I understand the issue you are reporting.  You created a website that is based on the site you mentioned and in the new site (your site) the links are not working?

      It would simplify my investigation if you provide a simplified version/repro of the issue you are seeing and uploading it here.  I do not have enough information to see what is happening.

      Also, will you provide the extended version of Windows 10 you are using?  Win + S and type “winver” and hit enter.

      Thank you,


    • Hi

      I obviously did not explain clearly. I am accessing a tide-time website and just want to use the edge new tab / top site facility to create an icon that will take me there.
      The problem is that the URL is

      if I put this into a new topsite icon (the box with a + on it) it gets converted (all upper case change to lower) to
      http://www.ukho.gov.uk/easytide/easytide/showprediction.aspx?portid=0036a&predictionlength=7 and no longer works.

      Winver shows Version 2709 (OS Build 16299.371)
      Microsoft Edge 41.16299.371.0
      Microsoft EdgeHTML 16.16299

      Dave Barratt

    • Hi David,

      That makes sense.  Thank you for clarifying.  I was able to reproduce this issue.  Interesting discovery.  :)

      Appreciate the support,


    • Microsoft Edge Team

      Changed Assigned To to “Scott L.”

      Changed Assigned To to “David R.”

    • Same problem with the Australian BOM site (weather radar)
      URL for Sydney is:
      With idr in lower case, message received is: The page you requested was not found on this server

    • Microsoft Edge Team

      Changed Assigned To to “Jeremy T.”

      Changed Assigned To from “Jeremy T.” to “Ravi D.”

      Changed Assigned To from “Ravi D.” to “Ray R.”

      Changed Status to “Confirmed”

      Changed Assigned To from “Ray R.” to “Puneet P.”

      Changed Assigned To from “Puneet P.” to “Ray R.”

      Changed Status from “Confirmed” to “Won’t fix”

    • Any reason for the Won’t Fix? This is rather annoying with applications like Jira.

    • It’s worth noting that https://www.w3.org/TR/WD-html40-970708/htmlweb.html indicates: "URLs in general are case-sensitive". And while https://tools.ietf.org/html/rfc1738 is not specific on case, it is very specific about case-insensitivity in the scheme, implying that case-sensitivity is default and should therefore apply to the scheme-specific-part.

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