# Populate tags from filename **URL:** \ **Category:** Support\ **Created:** [March 2, 2016, 11:19am UTC](https://community.mp3tag.de/t/populate-tags-from-filename/17709 "2016-03-02T11:19:54Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![bilfen](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/b/67e7ee/32.png) [@bilfen](https://community.mp3tag.de/u/bilfen)\ **Post date:** [March 2, 2016, 11:19am UTC](https://community.mp3tag.de/t/populate-tags-from-filename/17709/1 "2016-03-02T11:19:54Z")
I can't work out how to replace a tag in multiple files with a value (the same for each file) which I include in the action. I have tried using a regular expression in quick action Action: replace with regular expression Field: %album% RegEx: .\* Replace with: Hello Dolly However if comes up with Hello DollyHello Dolly every time. Can someone please help me to get it right? TIA Bilfen ---
**Author:** ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)\ **Post date:** [March 2, 2016, 12:03pm UTC](https://community.mp3tag.de/t/populate-tags-from-filename/17709/2 "2016-03-02T12:03:59Z")
If you want to get a string constant into a field, proceed as follows load the files select the files either use the tag panel, the extended tags dialogue to enter the string manually or use an action of the type "Format value" for the field (here probably ALBUM) and enter as Format string: Hello Dolly BTW: what does your attempt have to do with the filename? I can't see a reference to the filename anywhere. To get data from a filename, use the function Convert\>Filename-Tag ---
**Author:** ![system](https://community.mp3tag.de/uploads/default/original/2X/c/ce7035d426cb755a7916793326d23b465222a407.png) [@system](https://community.mp3tag.de/u/system)\ **Post date:** [February 9, 2026, 12:26pm UTC](https://community.mp3tag.de/t/populate-tags-from-filename/17709/3 "2026-02-09T12:26:07Z")
Closed on February 9, 2026, 12:26pm UTC