diff --git a/src/all/mangaup/AndroidManifest.xml b/src/all/mangaup/AndroidManifest.xml
new file mode 100644
index 000000000..02005096f
--- /dev/null
+++ b/src/all/mangaup/AndroidManifest.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="eu.kanade.tachiyomi.extension">
+
+    <application>
+        <activity
+            android:name=".all.mangaup.MangaUpUrlActivity"
+            android:excludeFromRecents="true"
+            android:exported="true"
+            android:theme="@android:style/Theme.NoDisplay">
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data
+                    android:host="global.manga-up.com"
+                    android:pathPattern="/manga/..*"
+                    android:scheme="https" />
+                <data
+                    android:host="www.global.manga-up.com"
+                    android:pathPattern="/manga/..*"
+                    android:scheme="https" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>
diff --git a/src/all/mangaup/README.md b/src/all/mangaup/README.md
new file mode 100644
index 000000000..ab000dc15
--- /dev/null
+++ b/src/all/mangaup/README.md
@@ -0,0 +1,16 @@
+# Manga UP!
+
+Table of Content
+- [FAQ](#FAQ)
+  - [Why chapters are missing in some titles?](#why-chapters-are-missing-in-some-titles)
+
+## FAQ
+
+### Why chapters are missing in some titles?
+
+Manga UP! have series with paid chapters. These will be filtered out from the chapter
+list by default, even if you have bought then before. To read these chapters, use their
+official app to purchase with their coin system and read there.
+
+To check if a chapter is paid, open the WebView and check if the chapter thumbnail is
+grayed out with a "Exclusive on app" warning or has an "Advanced" badge.
diff --git a/src/all/mangaup/build.gradle b/src/all/mangaup/build.gradle
new file mode 100644
index 000000000..fd180f392
--- /dev/null
+++ b/src/all/mangaup/build.gradle
@@ -0,0 +1,12 @@
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlinx-serialization'
+
+ext {
+    extName = 'Manga UP!'
+    pkgNameSuffix = 'all.mangaup'
+    extClass = '.MangaUpFactory'
+    extVersionCode = 1
+}
+
+apply from: "$rootDir/common.gradle"
diff --git a/src/all/mangaup/res/mipmap-hdpi/ic_launcher.png b/src/all/mangaup/res/mipmap-hdpi/ic_launcher.png
new file mode 100644
index 000000000..180dc064d
Binary files /dev/null and b/src/all/mangaup/res/mipmap-hdpi/ic_launcher.png differ
diff --git a/src/all/mangaup/res/mipmap-mdpi/ic_launcher.png b/src/all/mangaup/res/mipmap-mdpi/ic_launcher.png
new file mode 100644
index 000000000..05827ee90
Binary files /dev/null and b/src/all/mangaup/res/mipmap-mdpi/ic_launcher.png differ
diff --git a/src/all/mangaup/res/mipmap-xhdpi/ic_launcher.png b/src/all/mangaup/res/mipmap-xhdpi/ic_launcher.png
new file mode 100644
index 000000000..9281fd97a
Binary files /dev/null and b/src/all/mangaup/res/mipmap-xhdpi/ic_launcher.png differ
diff --git a/src/all/mangaup/res/mipmap-xxhdpi/ic_launcher.png b/src/all/mangaup/res/mipmap-xxhdpi/ic_launcher.png
new file mode 100644
index 000000000..59d1d2b7e
Binary files /dev/null and b/src/all/mangaup/res/mipmap-xxhdpi/ic_launcher.png differ
diff --git a/src/all/mangaup/res/mipmap-xxxhdpi/ic_launcher.png b/src/all/mangaup/res/mipmap-xxxhdpi/ic_launcher.png
new file mode 100644
index 000000000..a82fdcee6
Binary files /dev/null and b/src/all/mangaup/res/mipmap-xxxhdpi/ic_launcher.png differ
diff --git a/src/all/mangaup/res/web_hi_res_512.png b/src/all/mangaup/res/web_hi_res_512.png
new file mode 100644
index 000000000..2bd22fc93
Binary files /dev/null and b/src/all/mangaup/res/web_hi_res_512.png differ
diff --git a/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUp.kt b/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUp.kt
new file mode 100644
index 000000000..8b85840cf
--- /dev/null
+++ b/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUp.kt
@@ -0,0 +1,194 @@
+package eu.kanade.tachiyomi.extension.all.mangaup
+
+import eu.kanade.tachiyomi.network.GET
+import eu.kanade.tachiyomi.network.asObservableSuccess
+import eu.kanade.tachiyomi.network.interceptor.rateLimitHost
+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.decodeFromString
+import kotlinx.serialization.json.Json
+import okhttp3.Headers
+import okhttp3.HttpUrl.Companion.toHttpUrl
+import okhttp3.Interceptor
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.Response
+import okhttp3.internal.closeQuietly
+import rx.Observable
+import uy.kohesive.injekt.injectLazy
+
+class MangaUp(override val lang: String) : HttpSource() {
+
+    override val name = "Manga UP!"
+
+    override val baseUrl = "https://global.manga-up.com"
+
+    override val supportsLatest = false
+
+    override fun headersBuilder(): Headers.Builder = Headers.Builder()
+        .add("Origin", baseUrl)
+        .add("Referer", baseUrl)
+        .add("User-Agent", USER_AGENT)
+
+    override val client: OkHttpClient = network.client.newBuilder()
+        .addInterceptor(::thumbnailIntercept)
+        .rateLimitHost(API_URL.toHttpUrl(), 1)
+        .rateLimitHost(baseUrl.toHttpUrl(), 2)
+        .build()
+
+    private val json: Json by injectLazy()
+
+    private var titleList: List<MangaUpTitle>? = null
+
+    override fun popularMangaRequest(page: Int): Request {
+        return GET("$API_URL/search?format=json", headers)
+    }
+
+    override fun popularMangaParse(response: Response): MangasPage {
+        titleList = response.parseAs<MangaUpSearch>().titles
+
+        val titles = titleList!!
+            .sortedByDescending { it.bookmarkCount ?: 0 }
+            .map(MangaUpTitle::toSManga)
+
+        return MangasPage(titles, hasNextPage = false)
+    }
+
+    override fun latestUpdatesRequest(page: Int) = throw UnsupportedOperationException("Not used")
+
+    override fun latestUpdatesParse(response: Response) = throw UnsupportedOperationException("Not used")
+
+    override fun searchMangaRequest(page: Int, query: String, filters: FilterList): Request {
+        if (query.startsWith(PREFIX_ID_SEARCH) && query.matches(ID_SEARCH_PATTERN)) {
+            return titleDetailsRequest(query.removePrefix(PREFIX_ID_SEARCH))
+        }
+
+        val apiUrl = "$API_URL/manga/search".toHttpUrl().newBuilder()
+            .addQueryParameter("word", query)
+            .addQueryParameter("format", "json")
+            .toString()
+
+        return GET(apiUrl, headers)
+    }
+
+    override fun searchMangaParse(response: Response): MangasPage {
+        if (response.request.url.toString().contains("manga/detail")) {
+            val titleId = response.request.url.queryParameter("title_id")!!
+
+            val title = response.parseAs<MangaUpTitle>().toSManga().apply {
+                url = "/manga/$titleId"
+            }
+
+            return MangasPage(listOf(title), hasNextPage = false)
+        }
+
+        val titles = response.parseAs<MangaUpSearch>().titles
+
+        val query = response.request.url.queryParameter("word")
+
+        if (query.isNullOrEmpty()) {
+            fetchAllTitles()
+        } else {
+            titleList = titles
+        }
+
+        return MangasPage(titles.map(MangaUpTitle::toSManga), hasNextPage = false)
+    }
+
+    private fun titleDetailsRequest(mangaUrl: String): Request {
+        val titleId = mangaUrl.substringAfterLast("/")
+
+        val apiUrl = "$API_URL/manga/detail".toHttpUrl().newBuilder()
+            .addQueryParameter("title_id", titleId)
+            .addQueryParameter("ui_lang", lang)
+            .addQueryParameter("format", "json")
+            .toString()
+
+        return GET(apiUrl, headers)
+    }
+
+    // Workaround to allow "Open in browser" use the real URL.
+    override fun fetchMangaDetails(manga: SManga): Observable<SManga> {
+        return client.newCall(titleDetailsRequest(manga.url))
+            .asObservableSuccess()
+            .map { response ->
+                mangaDetailsParse(response).apply { initialized = true }
+            }
+    }
+
+    override fun mangaDetailsParse(response: Response): SManga {
+        return response.parseAs<MangaUpTitle>().toSManga()
+    }
+
+    override fun chapterListRequest(manga: SManga): Request = titleDetailsRequest(manga.url)
+
+    override fun chapterListParse(response: Response): List<SChapter> {
+        val titleId = response.request.url.queryParameter("title_id")!!.toInt()
+
+        return response.parseAs<MangaUpTitle>().readableChapters
+            .map { it.toSChapter(titleId) }
+    }
+
+    override fun pageListRequest(chapter: SChapter): Request {
+        val chapterId = chapter.url.substringAfterLast("/")
+
+        return GET("$API_URL/manga/viewer?chapter_id=$chapterId&format=json", headers)
+    }
+
+    override fun pageListParse(response: Response): List<Page> {
+        return response.parseAs<MangaUpViewer>().pages
+            .mapIndexed { i, page -> Page(i, "", page.imageUrl) }
+    }
+
+    override fun fetchImageUrl(page: Page): Observable<String> = Observable.just(page.imageUrl!!)
+
+    override fun imageUrlParse(response: Response): String = ""
+
+    // Fetch all titles to get newer thumbnail URLs in the interceptor.
+    private fun fetchAllTitles() = runCatching {
+        val popularResponse = client.newCall(popularMangaRequest(1)).execute()
+        titleList = popularResponse.parseAs<MangaUpSearch>().titles
+    }
+
+    private fun thumbnailIntercept(chain: Interceptor.Chain): Response {
+        val request = chain.request()
+        val response = chain.proceed(request)
+
+        if (response.code == 401 && request.url.toString().contains(TITLE_THUMBNAIL_PATH)) {
+            val titleId = request.url.toString()
+                .substringAfter("/$TITLE_THUMBNAIL_PATH/")
+                .substringBefore(".webp")
+                .toInt()
+            val title = titleList?.find { it.id == titleId } ?: return response
+
+            val thumbnailUrl = title.mainThumbnailUrl
+                ?: title.thumbnailUrl
+                ?: return response
+
+            response.closeQuietly()
+            val thumbnailRequest = GET(thumbnailUrl, request.headers)
+            return chain.proceed(thumbnailRequest)
+        }
+
+        return response
+    }
+
+    private inline fun <reified T> Response.parseAs(): T = use {
+        json.decodeFromString(body?.string().orEmpty())
+    }
+
+    companion object {
+        private const val API_URL = "https://global-web-api.manga-up.com/api"
+        private const val USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) " +
+            "AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36"
+
+        private const val TITLE_THUMBNAIL_PATH = "manga_list"
+
+        const val PREFIX_ID_SEARCH = "id:"
+        private val ID_SEARCH_PATTERN = "^id:(\\d+)$".toRegex()
+    }
+}
diff --git a/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUpDto.kt b/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUpDto.kt
new file mode 100644
index 000000000..795972f2e
--- /dev/null
+++ b/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUpDto.kt
@@ -0,0 +1,97 @@
+package eu.kanade.tachiyomi.extension.all.mangaup
+
+import eu.kanade.tachiyomi.source.model.SChapter
+import eu.kanade.tachiyomi.source.model.SManga
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import java.util.Date
+
+@Serializable
+data class MangaUpSearch(
+    val titles: List<MangaUpTitle> = emptyList()
+)
+
+@Serializable
+data class MangaUpViewer(
+    val pages: List<MangaUpPage> = emptyList()
+)
+
+@Serializable
+data class MangaUpTitle(
+    @SerialName("titleId") val id: Int? = null,
+    @SerialName("titleName") val name: String,
+    val authorName: String? = null,
+    val description: String? = null,
+    val copyright: String? = null,
+    val thumbnailUrl: String? = null,
+    val mainThumbnailUrl: String? = null,
+    val bookmarkCount: Int? = null,
+    val genres: List<MangaUpGenre> = emptyList(),
+    val chapters: List<MangaUpChapter> = emptyList()
+) {
+
+    private val fullDescription: String
+        get() = buildString {
+            description?.let { append(it) }
+            copyright?.let { append("\n\n" + it.replace("(C)", "© ")) }
+        }
+
+    private val isFinished: Boolean
+        get() = chapters.any { it.mainName.contains("final chapter", ignoreCase = true) }
+
+    val readableChapters: List<MangaUpChapter>
+        get() = chapters.filter(MangaUpChapter::isReadable).reversed()
+
+    fun toSManga(): SManga = SManga.create().apply {
+        title = name
+        author = authorName
+        description = fullDescription.trim()
+        genre = genres.joinToString { it.name }
+        status = if (isFinished) SManga.COMPLETED else SManga.ONGOING
+        thumbnail_url = mainThumbnailUrl ?: thumbnailUrl
+        url = "/manga/$id"
+    }
+}
+
+@Serializable
+data class MangaUpGenre(
+    val id: Int,
+    val name: String
+)
+
+@Serializable
+data class MangaUpChapter(
+    val id: Int,
+    val mainName: String,
+    val subName: String? = null,
+    val price: Int? = null,
+    val published: Int,
+    val badge: MangaUpBadge = MangaUpBadge.FREE,
+    val available: Boolean = false
+) {
+
+    val isReadable: Boolean
+        get() = badge == MangaUpBadge.FREE && available
+
+    fun toSChapter(titleId: Int): SChapter = SChapter.create().apply {
+        name = mainName.replace(WRONG_SPACING_REGEX, "-$1") +
+            if (!subName.isNullOrEmpty()) ": $subName" else ""
+        date_upload = (published * 1000L).takeIf { it <= Date().time } ?: 0L
+        url = "/manga/$titleId/$id"
+    }
+
+    companion object {
+        private val WRONG_SPACING_REGEX = "\\s+-(\\d+)$".toRegex()
+    }
+}
+
+enum class MangaUpBadge {
+    FREE,
+    ADVANCE,
+    UPDATE
+}
+
+@Serializable
+data class MangaUpPage(
+    val imageUrl: String
+)
diff --git a/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUpFactory.kt b/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUpFactory.kt
new file mode 100644
index 000000000..146ca1e2d
--- /dev/null
+++ b/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUpFactory.kt
@@ -0,0 +1,16 @@
+package eu.kanade.tachiyomi.extension.all.mangaup
+
+import eu.kanade.tachiyomi.source.Source
+import eu.kanade.tachiyomi.source.SourceFactory
+
+class MangaUpFactory : SourceFactory {
+    /**
+     * They only have English for now, but the website does have a
+     * language selector and the API also supports that.
+     *
+     * Probably it's something they will add in the future, so better
+     * to already make the extension a multilang to avoid users having
+     * to migrate to an All extension after.
+     */
+    override fun createSources(): List<Source> = listOf(MangaUp("en"))
+}
diff --git a/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUpUrlActivity.kt b/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUpUrlActivity.kt
new file mode 100644
index 000000000..81dffe7bc
--- /dev/null
+++ b/src/all/mangaup/src/eu/kanade/tachiyomi/extension/all/mangaup/MangaUpUrlActivity.kt
@@ -0,0 +1,41 @@
+package eu.kanade.tachiyomi.extension.all.mangaup
+
+import android.app.Activity
+import android.content.ActivityNotFoundException
+import android.content.Intent
+import android.os.Bundle
+import android.util.Log
+import kotlin.system.exitProcess
+
+class MangaUpUrlActivity : Activity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val pathSegments = intent?.data?.pathSegments
+        if (pathSegments != null && pathSegments.size > 1) {
+            val query = pathSegments[1]
+
+            if (query != null) {
+                val mainIntent = Intent().apply {
+                    action = "eu.kanade.tachiyomi.SEARCH"
+                    putExtra("query", MangaUp.PREFIX_ID_SEARCH + query)
+                    putExtra("filter", packageName)
+                }
+
+                try {
+                    startActivity(mainIntent)
+                } catch (e: ActivityNotFoundException) {
+                    Log.e("MangaPlusUrlActivity", e.toString())
+                }
+            } else {
+                Log.e("MangaUpUrlActivity", "Missing the title ID from the URL")
+            }
+        } else {
+            Log.e("MangaUpUrlActivity", "Could not parse URI from intent $intent")
+        }
+
+        finish()
+        exitProcess(0)
+    }
+}