diff --git a/CHANGELOG.md b/CHANGELOG.md
index c103557f235..3b8c16e61ad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,8 @@
 
 * `scarches`: Loading of legacy models no longer asumes the model to based on SCANVI. An argument (`reference_class`) was added which need to be set in this case (PR #1035). 
 
+* `convert/from_h5mu_to_seurat` has been deprecated and will be removed in openpipeline 4.0. Use `convert/from_h5mu_or_h5ad_to_seurat` instead (PR #1046).
+
 ## NEW FUNCTIONALITY
 
 * (Experimental) Added `from_h5mu_or_h5ad_to_tiledb` component. Warning: the functionality in this component is experimental
@@ -23,6 +25,8 @@
 
 * `liana`: enabled jobs to be run in parallel and added two new arguments: `consensus_opts`, `de_method` (PR #1039)
 
+* `from_h5mu_or_h5ad_to_seurat`: converts an h5ad file or a single modality from an h5mu file to a seurat object (PR #1046).
+
 ## MAJOR CHANGES
 
 * `mapping/cellranger_*`: Upgrade CellRanger to v9.0 (PR #992 and #1006).
diff --git a/src/convert/from_h5mu_or_h5ad_to_seurat/config.vsh.yaml b/src/convert/from_h5mu_or_h5ad_to_seurat/config.vsh.yaml
new file mode 100644
index 00000000000..208395483b9
--- /dev/null
+++ b/src/convert/from_h5mu_or_h5ad_to_seurat/config.vsh.yaml
@@ -0,0 +1,56 @@
+name: "from_h5mu_or_h5ad_to_seurat"
+namespace: "convert"
+scope: "public"
+description: |
+  Converts an h5ad file or a single modality of an h5mu file into a Seurat file.
+authors:
+  - __merge__: /src/authors/dorien_roosen.yaml
+    roles: [ author, maintainer ]
+arguments:
+  - name: "--input"
+    alternatives: ["-i"]
+    type: file
+    description: Input h5ad or h5mu file
+    direction: input
+    required: true
+    example: input.h5ad
+  - name: "--modality"
+    type: string
+    default: "rna"
+    required: false
+    description: Modality to be converted if the input file is an h5mu file.
+  - name: "--assay"
+    type: string
+    default: "RNA"
+    description: Name of the assay to be created.
+  - name: "--output"
+    alternatives: ["-o"]
+    type: file
+    description: Output Seurat file
+    direction: output
+    required: true
+    example: output.rds
+resources:
+  - type: r_script
+    path: script.R
+test_resources:
+  - type: r_script
+    path: test.R
+  - path: /resources_test/pbmc_1k_protein_v3/
+engines:
+  - type: docker
+    image: rocker/r2u:22.04
+    setup:
+      - type: apt
+        packages: [ libhdf5-dev, libgeos-dev, hdf5-tools ]
+      - type: r
+        cran: [ anndata, hdf5r, Seurat, SeuratObject ]
+        github: scverse/anndataR@36f3caad9a7f360165c1510bbe0c62657580415a
+    test_setup:
+      - type: r
+        cran: [ testthat ]
+runners:
+  - type: executable
+  - type: nextflow
+    directives:
+      label: [lowmem, singlecpu]
\ No newline at end of file
diff --git a/src/convert/from_h5mu_or_h5ad_to_seurat/script.R b/src/convert/from_h5mu_or_h5ad_to_seurat/script.R
new file mode 100644
index 00000000000..86515882e37
--- /dev/null
+++ b/src/convert/from_h5mu_or_h5ad_to_seurat/script.R
@@ -0,0 +1,81 @@
+library(anndataR)
+library(hdf5r)
+
+
+### VIASH START
+par <- list(
+  input = "resources_test/annotation_test_data/TS_Blood_filtered.h5mu",
+  output = "resources_test/annotation_test_data/TS_Blood_filtered.rds",
+  assay = "RNA",
+  modality = "rna"
+)
+### VIASH END
+
+is_mudata_file <- function(file_path) {
+  con <- file(file_path, "rb")
+  tryCatch({
+    # It is possible to create a MuData compatible h5 file without using
+    # MuData, and those could not have "MuData" as the first bytes.
+    # But that is really an edge case and this check should hold.
+    header <- readBin(con, "raw", n = 6)
+    identical(header, charToRaw("MuData"))
+  }, finally = {
+    close(con)
+  })
+}
+
+h5mu_to_h5ad <- function(h5mu_path, modality_name) {
+  tmp_path <- tempfile(fileext = ".h5ad")
+  mod_location <- paste("mod", modality_name, sep = "/")
+  h5src <- hdf5r::H5File$new(h5mu_path, "r")
+  h5dest <- hdf5r::H5File$new(tmp_path, "w")
+  # Copy over the child objects and the child attributes from root
+  # Root cannot be copied directly because it always exists and
+  # copying does not allow overwriting.
+  children <- hdf5r::list.objects(h5src,
+    path = mod_location,
+    full.names = FALSE, recursive = FALSE
+  )
+  for (child in children) {
+    h5dest$obj_copy_from(
+      h5src, paste(mod_location, child, sep = "/"),
+      paste0("/", child)
+    )
+  }
+  # Also copy the root attributes
+  root_attrs <- hdf5r::h5attr_names(x = h5src)
+  for (attr in root_attrs) {
+    h5a <- h5src$attr_open(attr_name = attr)
+    robj <- h5a$read()
+    h5dest$create_attr_by_name(
+      attr_name = attr,
+      obj_name = ".",
+      robj = robj,
+      space = h5a$get_space(),
+      dtype = h5a$get_type()
+    )
+  }
+  h5src$close()
+  h5dest$close()
+
+  tmp_path
+}
+
+# If the input is a MuData file, use a single modality as input instead
+if (is_mudata_file(par$input)) {
+  if (is.null(par$modality) || par$modality == "") {
+    stop("'modality' argument must be set if the input is a MuData file.")
+  }
+  h5ad_path <- h5mu_to_h5ad(par$input, par$modality)
+} else {
+  h5ad_path <- par$input
+}
+
+seurat_obj <- read_h5ad(
+  h5ad_path,
+  mode = "r",
+  as = "Seurat",
+  assay_name = par$assay
+)
+
+saveRDS(seurat_obj, file = par$output)
diff --git a/src/convert/from_h5mu_or_h5ad_to_seurat/test.R b/src/convert/from_h5mu_or_h5ad_to_seurat/test.R
new file mode 100644
index 00000000000..09367171d21
--- /dev/null
+++ b/src/convert/from_h5mu_or_h5ad_to_seurat/test.R
@@ -0,0 +1,82 @@
+library(testthat, warn.conflicts = FALSE)
+library(hdf5r)
+
+
+## VIASH START
+meta <- list(
+  executable = "target/executable/convert/from_h5ad_to_seurat",
+  resources_dir = "resources_test",
+  name = "from_h5ad_to_seurat"
+)
+## VIASH END
+
+cat("> Checking conversion of h5ad file\n")
+
+in_h5ad <- paste0(
+  meta[["resources_dir"]],
+  "/pbmc_1k_protein_v3/pbmc_1k_protein_v3_filtered_feature_bc_matrix_rna.h5ad"
+)
+out_rds <- "output.rds"
+
+cat("> Running ", meta[["name"]], "\n", sep = "")
+out <- processx::run(
+  meta[["executable"]],
+  c(
+    "--input", in_h5ad,
+    "--output", out_rds
+  )
+)
+
+cat("> Checking whether output file exists\n")
+expect_equal(out$status, 0)
+expect_true(file.exists(out_rds))
+
+cat("> Reading output file\n")
+obj <- readRDS(file = out_rds)
+
+cat("> Checking whether Seurat object is in the right format\n")
+expect_is(obj, "Seurat")
+expect_equal(names(slot(obj, "assays")), "RNA")
+
+open_file <- H5File$new(in_h5ad, mode = "r+")
+
+dim_rds <- dim(obj)
+dim_ad <- open_file[["X"]]$attr_open("shape")$read()
+
+expect_equal(dim_rds[1], dim_ad[2])
+expect_equal(dim_rds[2], dim_ad[1])
+
+cat("> Checking conversion of h5mu file\n")
+
+in_h5mu <- paste0(
+  meta[["resources_dir"]],
+  "/pbmc_1k_protein_v3/pbmc_1k_protein_v3_filtered_feature_bc_matrix.h5mu"
+)
+out_rds <- "output.rds"
+
+cat("> Running ", meta[["name"]], "\n", sep = "")
+out <- processx::run(
+  meta[["executable"]],
+  c(
+    "--input", in_h5mu,
+    "--output", out_rds
+  )
+)
+
+cat("> Checking whether output file exists\n")
+expect_equal(out$status, 0)
+expect_true(file.exists(out_rds))
+
+cat("> Reading output file\n")
+obj <- readRDS(file = out_rds)
+
+cat("> Checking whether Seurat object is in the right format\n")
+expect_is(obj, "Seurat")
+expect_equal(names(slot(obj, "assays")), "RNA")
+
+dim_rds <- dim(obj)
+mu_in <- H5File$new(in_h5mu, mode = "r")
+dim_ad <- mu_in[["/mod/rna/X"]]$attr_open("shape")$read()
+
+expect_equal(dim_rds[1], dim_ad[2])
+expect_equal(dim_rds[2], dim_ad[1])
diff --git a/src/convert/from_h5mu_to_seurat/config.vsh.yaml b/src/convert/from_h5mu_to_seurat/config.vsh.yaml
index bc9ba3a3124..f67791a5363 100644
--- a/src/convert/from_h5mu_to_seurat/config.vsh.yaml
+++ b/src/convert/from_h5mu_to_seurat/config.vsh.yaml
@@ -1,6 +1,7 @@
 name: "from_h5mu_to_seurat"
 namespace: "convert"
 scope: "public"
+status: "deprecated"
 description: |
   Converts an h5mu file into a Seurat file.