Suppressing the words "In", "DOI" and "URL" in biblatex reference

Question

I'm using Overleaf with biblatex, backend=biber, style=numeric, sorting=none. And I don't want the words "In", "URL" and "DOI" be written out before the actual journal, url or DOI link in my reference.

I get:

[1] E. Wigner. “On Unitary Representations of the Inhomogeneous Lorentz Group”. In: Annals of Mathematics40.1 (1939), pp. 149–204. URL: http://www.jstor.org/stable/1968551.

But I want:

[1] E. Wigner. “On Unitary Representations of the Inhomogeneous Lorentz Group”. Annals of Mathematics40.1 (1939), pp. 149–204. http://www.jstor.org/stable/1968551.

Answer 1

Add this to your preamble:

\renewbibmacro*{in:}{}
\DeclareFieldFormat{url}{\url{#1}}
\DeclareFieldFormat{doi}{%
  \ifhyperref
    {\href{https://doi.org/#1}{\nolinkurl{#1}}}
    {\nolinkurl{#1}}}

Compare these with the default definitions from biblatex.def which include "in: ", "URL: ", and DOI: ":

\newbibmacro*{in:}{%
  \printtext{%
    \bibstring{in}\intitlepunct}}
\DeclareFieldFormat{url}{\mkbibacro{URL}\addcolon\space\url{#1}}
\DeclareFieldFormat{doi}{%
  \mkbibacro{DOI}\addcolon\space
  \ifhyperref
    {\href{https://doi.org/#1}{\nolinkurl{#1}}}
    {\nolinkurl{#1}}}

(See also the linked question in @moewe's comment below for further details on suppressing "in:".)