how to add # before tags?

You could just do cosmetic changes on your theme with some javascript:

<script type="text/javascript">
jQuery(document).ready(function(){
    jQuery('.tags li a').prepend('#');
});
</script>

<ul class="tags">
    <li><a href="https://wordpress.stackexchange.com/tag/sometag/">sometag</a></li>
</ul>

Related Posts:

  1. How do I display a tag cloud under my post that only shows tags from that post?
  2. Please help me to figure out how to display my tags
  3. Code to check how many posts a tag has?
  4. Tag pages with regular editor
  5. showing tag beside catagory
  6. Tags Sorted By Characters?
  7. What file is responsible with tags displaying on the post?
  8. Order tags, but not alphabetically
  9. What is the difference between terms and tags?
  10. how can I use WP_Query to exclude a specific tag.?
  11. not functioning
  12. Best way to show map of tagged posts?
  13. Remove a particular tag name from the tagcloud
  14. How do I change the output of get_the_tag_list()?
  15. How to remove Tags: text from the_tags?
  16. What are allowedposttags and allowedtags?
  17. When switching from html to visual editor the tag gets erased
  18. List ‘n’ number of posts from a Tag, each with a different class or ID
  19. Redirect Tag to Post with the same name
  20. When are tags counted? Can it be trigered manually?
  21. alt attributes not showing on pages
  22. display tag slug as class per link in tag cloud
  23. How to add class on term link?
  24. Change the color of post title on specific tags
  25. How to use meta data for each tag cloud a
  26. Exclude a specific tag from the get_the_tags list
  27. Limit tag cloud terms by date
  28. URL scheme to retrieve tag archive by ID
  29. How to get all tags collections in woocommerce?
  30. In need of array of post tags
  31. Query all posts which do not have tags assigned to them
  32. Tag subscription option in wordpress. How?
  33. How to allow html5 tag in WordPress
  34. How to list custom tags too, to wp-list-table table?
  35. Do not change the order of the tags in the editor
  36. Display posts and thumbnails with certain tags
  37. Creating custom tags
  38. What is the best way to create a menu item that links to all posts with a certain tag?
  39. How can I prevent wordpress from creating tag pages?
  40. how can i add all my tags to tagcloud?
  41. Using HTML 5 Details/Summary Tag
  42. Blog post : Remove comma between Tag names [closed]
  43. Why word can’t be displayed in wordpress?
  44. Get all terms if product of that term contains a specific category
  45. How can the user place a custom text string as a placeholder for a plugin
  46. Show post tags on attachment page?
  47. using get_the_category to get all post categories except one
  48. What hooks are needed to bind a tag to a reusable block?
  49. How to echo tag description on loop-page.php using WPeC 3.8
  50. I want a query to list tags
  51. Display get_the_tag_list by order entered in the backend
  52. wordpress str_replace the content with tag
  53. Highlight current tag using get_tags()
  54. show tags on “single”-template sidebar only
  55. Is there any way of making post tags (or custom post type tags) pop up as suggestion as in StackExchange sites?
  56. How to display tags with post_content
  57. Exclude Specific Tag On Homepage
  58. Change Size of P Tag on One Page Template [closed]
  59. How to add keyword field in custom form programmatically?
  60. category specific most used tags query
  61. Adding Related Articles to post
  62. WordPress title as keywords (tags) with excluded stop words
  63. Add/remove tags on frontend programmatically
  64. Outputting HTML elements through WP-API
  65. Function to echo (or display?) wordpress tags in the head section
  66. No line breaks in tags in tag cloud
  67. Custom text for certain tags
  68. get_edit_tag_link does not return anything
  69. get an attachment’s media tags or check if it has a media tag?
  70. Is it possible to embed a wordpress tag page on wordpress?
  71. List latest post for each tag with a category
  72. How can I combine WordPress default Tags and bbPress tags into one archive page?
  73. How to add product tag to order list
  74. How do I display all tags (linked) from all posts, inline, with a separator?
  75. Hide/exclude certain tags under single post
  76. How do I get tags linking to proper pages (/tag/sample-tag -> pages with that tag)
  77. Show ‘tags’ for a post on the frontend when in a list view
  78. How remove tags just have one post?
  79. How to remove base tags at the wordpress
  80. How are special characters encoded in tag-URL?
  81. How to show tags + posts for a custom taxonomy?
  82. How can I show a tag description, using ‘slug’ rather than ‘id’
  83. Is it possible to have a Faceted Navigation/Filters on a Product Tag page?
  84. method to fetch entire tag list on archive.php
  85. How to list tags
  86. If tag x then show y + tag name(s)
  87. Conditional inside search result excerpt
  88. Show all tags NOT applied to post
  89. Is There A Way To Add Weight Or Order To Tags?
  90. Mapping external data to tags via term_id
  91. How to take list of words and insert them as terms to become tags of a post
  92. Tag selection while adding new post
  93. Create three unique tag page templates
  94. Assign tags records that have a keyword
  95. How to include post count in this “get_tags” snippet
  96. How to retrieve the post_id of a tag page?
  97. How to add tags to identify custom post types in archives?
  98. Datetime on time tag wordpress puts it outside the tag
  99. See when a tag was first added
  100. How to make attachment tag archive visible on page
error code: 523