diff --git a/src/es/leercomicsonline/build.gradle b/src/es/leercomicsonline/build.gradle
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+++ b/src/es/leercomicsonline/build.gradle
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+ext {
+    extName = 'Leer Comics Online'
+    extClass = '.LeerComicsOnline'
+    extVersionCode = 1
+}
+
+apply from: "$rootDir/common.gradle"
diff --git a/src/es/leercomicsonline/res/mipmap-hdpi/ic_launcher.png b/src/es/leercomicsonline/res/mipmap-hdpi/ic_launcher.png
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diff --git a/src/es/leercomicsonline/res/mipmap-xxxhdpi/ic_launcher.png b/src/es/leercomicsonline/res/mipmap-xxxhdpi/ic_launcher.png
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diff --git a/src/es/leercomicsonline/src/eu/kanade/tachiyomi/extension/es/leercomicsonline/LeerComicsOnline.kt b/src/es/leercomicsonline/src/eu/kanade/tachiyomi/extension/es/leercomicsonline/LeerComicsOnline.kt
new file mode 100644
index 000000000..532b9e540
--- /dev/null
+++ b/src/es/leercomicsonline/src/eu/kanade/tachiyomi/extension/es/leercomicsonline/LeerComicsOnline.kt
@@ -0,0 +1,138 @@
+package eu.kanade.tachiyomi.extension.es.leercomicsonline
+
+import eu.kanade.tachiyomi.network.GET
+import eu.kanade.tachiyomi.source.model.FilterList
+import eu.kanade.tachiyomi.source.model.MangasPage
+import eu.kanade.tachiyomi.source.model.Page
+import eu.kanade.tachiyomi.source.model.SChapter
+import eu.kanade.tachiyomi.source.model.SManga
+import eu.kanade.tachiyomi.source.online.HttpSource
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.decodeFromString
+import kotlinx.serialization.json.Json
+import okhttp3.HttpUrl.Companion.toHttpUrl
+import okhttp3.Request
+import okhttp3.Response
+import uy.kohesive.injekt.injectLazy
+
+class LeerComicsOnline : HttpSource() {
+
+    override val name = "Leer Comics Online"
+    override val baseUrl = "https://leercomicsonline.com"
+    override val lang = "es"
+    override val supportsLatest = false
+
+    private val json: Json by injectLazy()
+
+    private val comicsPerPage = 20
+
+    override fun popularMangaRequest(page: Int): Request = GET(
+        baseUrl.toHttpUrl().newBuilder().apply {
+            addPathSegment("api")
+            addPathSegments("series")
+            addQueryParameter("page", page.toString())
+        }.build(),
+        headers,
+    )
+
+    override fun searchMangaRequest(page: Int, query: String, filters: FilterList): Request =
+        GET(
+            baseUrl.toHttpUrl().newBuilder().apply {
+                addPathSegment("api")
+                addPathSegments("series")
+                addQueryParameter("page", page.toString())
+                addQueryParameter("search", query)
+            }.build(),
+            headers,
+        )
+
+    override fun popularMangaParse(response: Response): MangasPage {
+        val page = response.request.url.queryParameter("page")!!.toInt()
+        val comics = json.decodeFromString<List<Comic>>(response.body.string())
+        return MangasPage(
+            comics.subList((page - 1) * comicsPerPage, page * comicsPerPage).map { comic ->
+                SManga.create().apply {
+                    initialized = true
+                    title = comic.title
+                    thumbnail_url = baseUrl.toHttpUrl().newBuilder().apply {
+                        addPathSegment("images")
+                        addPathSegment("${comic.url}-300x461.jpg")
+                    }.build().toString()
+                    setUrlWithoutDomain(
+                        baseUrl.toHttpUrl().newBuilder().apply {
+                            addPathSegment("api")
+                            addPathSegments("comics")
+                            addQueryParameter("serieId", comic.id.toString())
+                            addQueryParameter("slug", comic.url)
+                        }.build().toString(),
+                    )
+                }
+            },
+            comics.count() > (page - 1) * comicsPerPage,
+        )
+    }
+
+    override fun searchMangaParse(response: Response): MangasPage {
+        val mangasPage = popularMangaParse(response)
+        val searchQuery = response.request.url.queryParameter("search").toString()
+        return MangasPage(
+            mangasPage.mangas.filter {
+                it.title.lowercase().contains(searchQuery, ignoreCase = true)
+            },
+            mangasPage.hasNextPage,
+        )
+    }
+
+    override fun getMangaUrl(manga: SManga): String = baseUrl.toHttpUrl().newBuilder().apply {
+        addPathSegment("categorias")
+        addPathSegment((baseUrl + manga.url).toHttpUrl().queryParameter("slug").toString())
+    }.build().toString()
+
+    override fun chapterListParse(response: Response): List<SChapter> =
+        json.decodeFromString<List<Comic>>(response.body.string()).reversed().map {
+            SChapter.create().apply {
+                name = it.title
+                setUrlWithoutDomain(
+                    baseUrl.toHttpUrl().newBuilder().apply {
+                        addPathSegment("api")
+                        addPathSegment("pages")
+                        addQueryParameter("id", it.id.toString())
+                        addQueryParameter(
+                            "letter",
+                            it.url.first().toString(),
+                        )
+                        addQueryParameter("slug", it.url)
+                    }.build().toString(),
+                )
+            }
+        }
+
+    override fun getChapterUrl(chapter: SChapter): String = baseUrl.toHttpUrl().newBuilder().apply {
+        addPathSegment((baseUrl + chapter.url).toHttpUrl().queryParameter("slug").toString())
+    }.build().toString()
+
+    override fun pageListParse(response: Response): List<Page> {
+        return try { // some chapters are just empty
+            json.decodeFromString<List<String>>(response.body.string()).mapIndexed { index, url ->
+                Page(index, imageUrl = url)
+            }
+        } catch (exception: Exception) {
+            emptyList()
+        }
+    }
+
+    @Serializable
+    class Comic(
+        val title: String,
+        val url: String,
+        val id: Int,
+    )
+
+    override fun imageUrlParse(response: Response): String = throw UnsupportedOperationException()
+    override fun latestUpdatesParse(response: Response): MangasPage =
+        throw UnsupportedOperationException()
+
+    override fun latestUpdatesRequest(page: Int): Request = throw UnsupportedOperationException()
+    override fun mangaDetailsParse(response: Response): SManga =
+        throw UnsupportedOperationException()
+}