diff --git a/modules/nf-core/custom/tabulartogseachip/environment.yml b/modules/nf-core/custom/tabulartogseachip/environment.yml
new file mode 100644
index 00000000000..cc49deffd16
--- /dev/null
+++ b/modules/nf-core/custom/tabulartogseachip/environment.yml
@@ -0,0 +1,5 @@
+channels:
+  - conda-forge
+  - bioconda
+dependencies:
+  - "conda-forge::gawk=5.1.0"
diff --git a/modules/nf-core/custom/tabulartogseachip/main.nf b/modules/nf-core/custom/tabulartogseachip/main.nf
new file mode 100644
index 00000000000..3065b5f925f
--- /dev/null
+++ b/modules/nf-core/custom/tabulartogseachip/main.nf
@@ -0,0 +1,44 @@
+process CUSTOM_TABULARTOGSEACHIP {
+
+    label 'process_single'
+
+    conda "${moduleDir}/environment.yml"
+    container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
+        'https://depot.galaxyproject.org/singularity/gawk:5.1.0' :
+        'biocontainers/gawk:5.1.0' }"
+
+    input:
+    path tabular
+    tuple val(id), val(symbol)
+
+    output:
+    path "*.chip"       , emit: chip
+    path "versions.yml" , emit: versions
+
+    when:
+    task.ext.when == null || task.ext.when
+
+    script:
+    def VERSION = '9.1' // WARN: Version information not provided by tool on CLI. Please update this string when bumping container versions.
+    """
+    function find_column_number {
+        file=\$1
+        column=\$2
+
+        head -n 1 \$file | tr '\\t' '\\n' | grep -n "^\${column}\$" | awk -F':' '{print \$1}'
+    }
+
+    id_col=\$(find_column_number $tabular $id)
+    symbol_col=\$(find_column_number $tabular $symbol)
+    outfile=\$(echo $tabular | sed 's/\\(.*\\)\\..*/\\1/').chip
+
+    echo -e "Probe Set ID\\tGene Symbol\\tGene Title" > \${outfile}.tmp
+    tail -n +2 $tabular | awk -F'\\t' -v id=\$id_col -v symbol=\$symbol_col '{print \$id"\\t"\$symbol"\\tNA"}' >> \${outfile}.tmp
+    mv \${outfile}.tmp \${outfile}
+
+    cat <<-END_VERSIONS > versions.yml
+    "${task.process}":
+        version: \$(echo $VERSION)
+    END_VERSIONS
+    """
+}
diff --git a/modules/nf-core/custom/tabulartogseachip/meta.yml b/modules/nf-core/custom/tabulartogseachip/meta.yml
new file mode 100644
index 00000000000..abbb01156dd
--- /dev/null
+++ b/modules/nf-core/custom/tabulartogseachip/meta.yml
@@ -0,0 +1,44 @@
+name: "custom_tabulartogseachip"
+description: Make a GSEA class file (.chip) from tabular inputs
+keywords:
+  - gsea
+  - chip
+  - convert
+  - tabular
+tools:
+  - custom:
+      description: "Make a GSEA class file (.chip) from tabular inputs"
+      tool_dev_url: "https://github.com/nf-core/modules/blob/master/modules/nf-core/custom/tabulartogseachip/main.nf"
+      identifier: ""
+input:
+  - - tabular:
+        type: file
+        description: |
+          Tabular (NOTE that for the moment it only works for TSV file) containing a column with the
+          features ids, and another column with the features symbols.
+        pattern: "*.{tsv}"
+  - - id:
+        type: string
+        description: The name of the column containing feature ids
+    - symbol:
+        type: string
+        description: The name of the column containing feature symbols
+output:
+  - chip:
+      - "*.chip":
+          type: file
+          description: |
+            A categorical class format file (.chip) as defined by the Broad
+            documentation at
+            https://software.broadinstitute.org/cancer/software/gsea/wiki/index.php/Data_formats
+          pattern: "*.chip"
+  - versions:
+      - versions.yml:
+          type: file
+          description: File containing software versions
+          pattern: "versions.yml"
+authors:
+  - "@pinin4fjords"
+  - "@suzannejin"
+maintainers:
+  - "@pinin4fjords"
diff --git a/modules/nf-core/custom/tabulartogseachip/tests/main.nf.test b/modules/nf-core/custom/tabulartogseachip/tests/main.nf.test
new file mode 100644
index 00000000000..08d82ef598c
--- /dev/null
+++ b/modules/nf-core/custom/tabulartogseachip/tests/main.nf.test
@@ -0,0 +1,36 @@
+nextflow_process {
+
+    name "Test Process CUSTOM_TABULARTOGSEACHIP"
+    script "../main.nf"
+    process "CUSTOM_TABULARTOGSEACHIP"
+
+    tag "modules"
+    tag "modules_nfcore"
+    tag "custom"
+    tag "custom/tabulartogseachip"
+
+    test("test tsv to chip") {
+        when {
+            process {
+                """
+                input[0] = Channel.fromPath(
+                    file(params.modules_testdata_base_path + 'genomics/mus_musculus/rnaseq_expression/SRP254919.salmon.merged.gene_counts.top1000cov.tsv', checkIfExists: true),
+                )
+                input[1] = Channel.of(['gene_id', 'gene_name'])
+                """
+            }
+        }
+
+        then {
+            assertAll(
+                { assert process.success },
+                { assert snapshot(
+                    process.out.chip,
+                    process.out.versions
+                ).match() }
+            )
+        }
+
+    }
+
+}
diff --git a/modules/nf-core/custom/tabulartogseachip/tests/main.nf.test.snap b/modules/nf-core/custom/tabulartogseachip/tests/main.nf.test.snap
new file mode 100644
index 00000000000..052333c70d7
--- /dev/null
+++ b/modules/nf-core/custom/tabulartogseachip/tests/main.nf.test.snap
@@ -0,0 +1,17 @@
+{
+    "test tsv to chip": {
+        "content": [
+            [
+                "SRP254919.salmon.merged.gene_counts.top1000cov.chip:md5,2ab8a685c675ce2fb97142526766044a"
+            ],
+            [
+                "versions.yml:md5,8416d7d8e5723a32c360278d4a1c4597"
+            ]
+        ],
+        "meta": {
+            "nf-test": "0.9.2",
+            "nextflow": "24.10.2"
+        },
+        "timestamp": "2024-12-13T15:37:38.643112727"
+    }
+}
\ No newline at end of file