diff --git a/cmake/FindJSONToolkit.cmake b/cmake/FindJSONToolkit.cmake
index b65f6d3b..d8b56780 100644
--- a/cmake/FindJSONToolkit.cmake
+++ b/cmake/FindJSONToolkit.cmake
@@ -1,6 +1,5 @@
 if(NOT JSONToolkit_FOUND)
   set(JSONTOOLKIT_INSTALL OFF CACHE BOOL "disable installation")
-  set(JSONTOOLKIT_JSONL OFF CACHE BOOL "disable JSONL support")
   add_subdirectory("${PROJECT_SOURCE_DIR}/vendor/jsontoolkit")
   set(JSONToolkit_FOUND ON)
 endif()
diff --git a/docs/validate.markdown b/docs/validate.markdown
index 7335ae5b..43125cee 100644
--- a/docs/validate.markdown
+++ b/docs/validate.markdown
@@ -7,14 +7,14 @@ Validating
 > Draft 2020-12 soon.
 
 ```sh
-jsonschema validate <schema.json> <instance.json> [--http/-h] [--verbose/-v]
-  [--resolve/-r <schemas-or-directories> ...]
+jsonschema validate <schema.json> <instance.json|.jsonl> [--http/-h]
+  [--verbose/-v] [--resolve/-r <schemas-or-directories> ...]
 ```
 
 The most popular use case of JSON Schema is to validate JSON documents. The
-JSON Schema CLI offers a `validate` command to evaluate a JSON instance against
-a JSON Schema, presenting human-friendly information on unsuccessful
-validation.
+JSON Schema CLI offers a `validate` command to evaluate either a JSON instance
+or a JSONL dataset against a JSON Schema, presenting human-friendly information
+on unsuccessful validation.
 
 **If you want to validate that a schema adheres to its metaschema, use the
 [`metaschema`](./metaschema.markdown) command instead.**
@@ -55,10 +55,10 @@ error: The target document is expected to be of the given type
 jsonschema validate path/to/my/schema.json path/to/my/instance.json
 ```
 
-### Validate a JSON Schema against it meta-schema
+### Validate a JSONL dataset against a schema
 
 ```sh
-jsonschema validate path/to/my/schema.json
+jsonschema validate path/to/my/schema.json path/to/my/dataset.jsonl
 ```
 
 ### Validate a JSON instance enabling HTTP resolution
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index aca9dcb8..deccfb27 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -14,6 +14,7 @@ noa_add_default_options(PRIVATE jsonschema_cli)
 set_target_properties(jsonschema_cli PROPERTIES OUTPUT_NAME jsonschema)
 target_link_libraries(jsonschema_cli PRIVATE sourcemeta::jsontoolkit::uri)
 target_link_libraries(jsonschema_cli PRIVATE sourcemeta::jsontoolkit::json)
+target_link_libraries(jsonschema_cli PRIVATE sourcemeta::jsontoolkit::jsonl)
 target_link_libraries(jsonschema_cli PRIVATE sourcemeta::jsontoolkit::jsonschema)
 target_link_libraries(jsonschema_cli PRIVATE sourcemeta::hydra::httpclient)
 
diff --git a/src/command_validate.cc b/src/command_validate.cc
index b355a68a..e9d2157f 100644
--- a/src/command_validate.cc
+++ b/src/command_validate.cc
@@ -1,4 +1,5 @@
 #include <sourcemeta/jsontoolkit/json.h>
+#include <sourcemeta/jsontoolkit/jsonl.h>
 #include <sourcemeta/jsontoolkit/jsonschema.h>
 
 #include <cstdlib>  // EXIT_SUCCESS, EXIT_FAILURE
@@ -46,26 +47,68 @@ auto intelligence::jsonschema::cli::validate(
   }
 
   bool result{true};
-  const auto &instance_path{options.at("").at(1)};
+  const std::filesystem::path instance_path{options.at("").at(1)};
   const auto schema_template{sourcemeta::jsontoolkit::compile(
       schema, sourcemeta::jsontoolkit::default_schema_walker, custom_resolver,
       sourcemeta::jsontoolkit::default_schema_compiler)};
 
-  const auto instance{sourcemeta::jsontoolkit::from_file(instance_path)};
+  if (instance_path.extension() == ".jsonl") {
+    log_verbose(options) << "Interpreting input as JSONL\n";
+    std::size_t index{0};
 
-  std::ostringstream error;
-  result = sourcemeta::jsontoolkit::evaluate(
-      schema_template, instance,
-      sourcemeta::jsontoolkit::SchemaCompilerEvaluationMode::Fast,
-      pretty_evaluate_callback(error, sourcemeta::jsontoolkit::empty_pointer));
+    auto stream{sourcemeta::jsontoolkit::read_file(instance_path)};
+    try {
+      for (const auto &instance : sourcemeta::jsontoolkit::JSONL{stream}) {
+        std::ostringstream error;
+        const auto subresult = sourcemeta::jsontoolkit::evaluate(
+            schema_template, instance,
+            sourcemeta::jsontoolkit::SchemaCompilerEvaluationMode::Fast,
+            pretty_evaluate_callback(error,
+                                     sourcemeta::jsontoolkit::empty_pointer));
 
-  if (result) {
-    log_verbose(options)
-        << "ok: " << std::filesystem::weakly_canonical(instance_path).string()
-        << "\n  matches "
-        << std::filesystem::weakly_canonical(schema_path).string() << "\n";
+        if (subresult) {
+          log_verbose(options)
+              << "ok: "
+              << std::filesystem::weakly_canonical(instance_path).string()
+              << " (entry #" << index << ")"
+              << "\n  matches "
+              << std::filesystem::weakly_canonical(schema_path).string()
+              << "\n";
+        } else {
+          std::cerr << "fail: "
+                    << std::filesystem::weakly_canonical(instance_path).string()
+                    << " (entry #" << index << ")\n\n";
+          sourcemeta::jsontoolkit::prettify(instance, std::cerr);
+          std::cerr << "\n\n";
+          std::cerr << error.str();
+          result = false;
+          break;
+        }
+
+        index += 1;
+      }
+    } catch (const sourcemeta::jsontoolkit::ParseError &error) {
+      // For producing better error messages
+      throw sourcemeta::jsontoolkit::FileParseError(instance_path, error);
+    }
   } else {
-    std::cerr << error.str();
+    const auto instance{sourcemeta::jsontoolkit::from_file(instance_path)};
+
+    std::ostringstream error;
+    result = sourcemeta::jsontoolkit::evaluate(
+        schema_template, instance,
+        sourcemeta::jsontoolkit::SchemaCompilerEvaluationMode::Fast,
+        pretty_evaluate_callback(error,
+                                 sourcemeta::jsontoolkit::empty_pointer));
+
+    if (result) {
+      log_verbose(options)
+          << "ok: " << std::filesystem::weakly_canonical(instance_path).string()
+          << "\n  matches "
+          << std::filesystem::weakly_canonical(schema_path).string() << "\n";
+    } else {
+      std::cerr << error.str();
+    }
   }
 
   return result ? EXIT_SUCCESS : EXIT_FAILURE;
diff --git a/src/main.cc b/src/main.cc
index 3d5edcb5..d810a216 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -21,7 +21,7 @@ Global Options:
 
 Commands:
 
-   validate <schema.json> <instance.json> [--http/-h]
+   validate <schema.json> <instance.json|.jsonl> [--http/-h]
 
        Validate an instance against the given schema.
 
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 9b2832a8..79f6d84f 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -61,6 +61,13 @@ add_jsonschema_test_unix(validate/pass_draft7)
 add_jsonschema_test_unix(validate/fail_draft4)
 add_jsonschema_test_unix(validate/fail_draft6)
 add_jsonschema_test_unix(validate/fail_draft7)
+add_jsonschema_test_unix(validate/pass_jsonl)
+add_jsonschema_test_unix(validate/pass_jsonl_verbose)
+add_jsonschema_test_unix(validate/fail_jsonl_invalid_entry)
+add_jsonschema_test_unix(validate/fail_jsonl_one)
+add_jsonschema_test_unix(validate/fail_jsonl_one_verbose)
+add_jsonschema_test_unix(validate/fail_jsonl_all)
+add_jsonschema_test_unix(validate/fail_jsonl_all_verbose)
 
 # Test
 add_jsonschema_test_unix(test/fail_true_single_resolve)
diff --git a/test/validate/fail_jsonl_all.sh b/test/validate/fail_jsonl_all.sh
new file mode 100755
index 00000000..d11a8942
--- /dev/null
+++ b/test/validate/fail_jsonl_all.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+TMP="$(mktemp -d)"
+clean() { rm -rf "$TMP"; }
+trap clean EXIT
+
+cat << 'EOF' > "$TMP/schema.json"
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "array"
+}
+EOF
+
+cat << 'EOF' > "$TMP/instance.jsonl"
+{ "foo": 1 }
+{ "foo": 2 }
+{ "foo": 3 }
+EOF
+
+"$1" validate "$TMP/schema.json" "$TMP/instance.jsonl" 2>"$TMP/stderr.txt" \
+  && CODE="$?" || CODE="$?"
+test "$CODE" = "1" || exit 1
+
+cat << EOF > "$TMP/expected.txt"
+fail: $(realpath "$TMP")/instance.jsonl (entry #0)
+
+{
+  "foo": 1
+}
+
+error: Schema validation failure
+  The target document is expected to be of the given type
+    at instance location ""
+    at evaluate path "/type"
+EOF
+
+diff "$TMP/stderr.txt" "$TMP/expected.txt"
diff --git a/test/validate/fail_jsonl_all_verbose.sh b/test/validate/fail_jsonl_all_verbose.sh
new file mode 100755
index 00000000..89e3feae
--- /dev/null
+++ b/test/validate/fail_jsonl_all_verbose.sh
@@ -0,0 +1,41 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+TMP="$(mktemp -d)"
+clean() { rm -rf "$TMP"; }
+trap clean EXIT
+
+cat << 'EOF' > "$TMP/schema.json"
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "array"
+}
+EOF
+
+cat << 'EOF' > "$TMP/instance.jsonl"
+{ "foo": 1 }
+{ "foo": 2 }
+{ "foo": 3 }
+EOF
+
+"$1" validate "$TMP/schema.json" "$TMP/instance.jsonl" --verbose 2>"$TMP/stderr.txt" \
+  && CODE="$?" || CODE="$?"
+test "$CODE" = "1" || exit 1
+
+cat << EOF > "$TMP/expected.txt"
+Interpreting input as JSONL
+fail: $(realpath "$TMP")/instance.jsonl (entry #0)
+
+{
+  "foo": 1
+}
+
+error: Schema validation failure
+  The target document is expected to be of the given type
+    at instance location ""
+    at evaluate path "/type"
+EOF
+
+diff "$TMP/stderr.txt" "$TMP/expected.txt"
diff --git a/test/validate/fail_jsonl_invalid_entry.sh b/test/validate/fail_jsonl_invalid_entry.sh
new file mode 100755
index 00000000..044bfa38
--- /dev/null
+++ b/test/validate/fail_jsonl_invalid_entry.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+TMP="$(mktemp -d)"
+clean() { rm -rf "$TMP"; }
+trap clean EXIT
+
+cat << 'EOF' > "$TMP/schema.json"
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object"
+}
+EOF
+
+cat << 'EOF' > "$TMP/instance.jsonl"
+{ "foo": "first" }
+{ "foo"  "second" }
+{ "foo": "third" }
+EOF
+
+"$1" validate "$TMP/schema.json" "$TMP/instance.jsonl" 2>"$TMP/stderr.txt" \
+  && CODE="$?" || CODE="$?"
+test "$CODE" = "1" || exit 1
+
+cat << EOF > "$TMP/expected.txt"
+error: Failed to parse the JSON document at line 2 and column 10
+  $(realpath "$TMP")/instance.jsonl
+EOF
+
+diff "$TMP/stderr.txt" "$TMP/expected.txt"
diff --git a/test/validate/fail_jsonl_one.sh b/test/validate/fail_jsonl_one.sh
new file mode 100755
index 00000000..42b1e961
--- /dev/null
+++ b/test/validate/fail_jsonl_one.sh
@@ -0,0 +1,42 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+TMP="$(mktemp -d)"
+clean() { rm -rf "$TMP"; }
+trap clean EXIT
+
+cat << 'EOF' > "$TMP/schema.json"
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object"
+}
+EOF
+
+cat << 'EOF' > "$TMP/instance.jsonl"
+{ "foo": 1 }
+[ { "foo": 2 } ]
+{ "foo": 3 }
+EOF
+
+"$1" validate "$TMP/schema.json" "$TMP/instance.jsonl" 2>"$TMP/stderr.txt" \
+  && CODE="$?" || CODE="$?"
+test "$CODE" = "1" || exit 1
+
+cat << EOF > "$TMP/expected.txt"
+fail: $(realpath "$TMP")/instance.jsonl (entry #1)
+
+[
+  {
+    "foo": 2
+  }
+]
+
+error: Schema validation failure
+  The target document is expected to be of the given type
+    at instance location ""
+    at evaluate path "/type"
+EOF
+
+diff "$TMP/stderr.txt" "$TMP/expected.txt"
diff --git a/test/validate/fail_jsonl_one_verbose.sh b/test/validate/fail_jsonl_one_verbose.sh
new file mode 100755
index 00000000..57f2064b
--- /dev/null
+++ b/test/validate/fail_jsonl_one_verbose.sh
@@ -0,0 +1,45 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+TMP="$(mktemp -d)"
+clean() { rm -rf "$TMP"; }
+trap clean EXIT
+
+cat << 'EOF' > "$TMP/schema.json"
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "type": "object"
+}
+EOF
+
+cat << 'EOF' > "$TMP/instance.jsonl"
+{ "foo": 1 }
+[ { "foo": 2 } ]
+{ "foo": 3 }
+EOF
+
+"$1" validate "$TMP/schema.json" "$TMP/instance.jsonl" --verbose 2>"$TMP/stderr.txt" \
+  && CODE="$?" || CODE="$?"
+test "$CODE" = "1" || exit 1
+
+cat << EOF > "$TMP/expected.txt"
+Interpreting input as JSONL
+ok: $(realpath "$TMP")/instance.jsonl (entry #0)
+  matches $(realpath "$TMP")/schema.json
+fail: $(realpath "$TMP")/instance.jsonl (entry #1)
+
+[
+  {
+    "foo": 2
+  }
+]
+
+error: Schema validation failure
+  The target document is expected to be of the given type
+    at instance location ""
+    at evaluate path "/type"
+EOF
+
+diff "$TMP/stderr.txt" "$TMP/expected.txt"
diff --git a/test/validate/pass_jsonl.sh b/test/validate/pass_jsonl.sh
new file mode 100755
index 00000000..97b846fa
--- /dev/null
+++ b/test/validate/pass_jsonl.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+TMP="$(mktemp -d)"
+clean() { rm -rf "$TMP"; }
+trap clean EXIT
+
+cat << 'EOF' > "$TMP/schema.json"
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "properties": {
+    "foo": {
+      "type": "string"
+    }
+  }
+}
+EOF
+
+cat << 'EOF' > "$TMP/instance.jsonl"
+{ "foo": "first" }
+{ "foo": "second" }
+{ "foo": "third" }
+EOF
+
+"$1" validate "$TMP/schema.json" "$TMP/instance.jsonl" 2> "$TMP/output.txt" 1>&2
+
+cat << EOF > "$TMP/expected.txt"
+EOF
+
+diff "$TMP/output.txt" "$TMP/expected.txt"
diff --git a/test/validate/pass_jsonl_verbose.sh b/test/validate/pass_jsonl_verbose.sh
new file mode 100755
index 00000000..cc055d1c
--- /dev/null
+++ b/test/validate/pass_jsonl_verbose.sh
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+set -o errexit
+set -o nounset
+
+TMP="$(mktemp -d)"
+clean() { rm -rf "$TMP"; }
+trap clean EXIT
+
+cat << 'EOF' > "$TMP/schema.json"
+{
+  "$schema": "http://json-schema.org/draft-04/schema#",
+  "properties": {
+    "foo": {
+      "type": "string"
+    }
+  }
+}
+EOF
+
+cat << 'EOF' > "$TMP/instance.jsonl"
+{ "foo": "first" }
+{ "foo": "second" }
+{ "foo": "third" }
+EOF
+
+"$1" validate "$TMP/schema.json" "$TMP/instance.jsonl" --verbose 2> "$TMP/output.txt" 1>&2
+
+cat << EOF > "$TMP/expected.txt"
+Interpreting input as JSONL
+ok: $(realpath "$TMP")/instance.jsonl (entry #0)
+  matches $(realpath "$TMP")/schema.json
+ok: $(realpath "$TMP")/instance.jsonl (entry #1)
+  matches $(realpath "$TMP")/schema.json
+ok: $(realpath "$TMP")/instance.jsonl (entry #2)
+  matches $(realpath "$TMP")/schema.json
+EOF
+
+diff "$TMP/output.txt" "$TMP/expected.txt"