diff --git a/modules/common/src/main/scala/docspell/common/SystemCommand.scala b/modules/common/src/main/scala/docspell/common/SystemCommand.scala
index 4f93d87a..06876c96 100644
--- a/modules/common/src/main/scala/docspell/common/SystemCommand.scala
+++ b/modules/common/src/main/scala/docspell/common/SystemCommand.scala
@@ -8,13 +8,10 @@ import java.util.concurrent.TimeUnit
 import cats.implicits._
 import cats.effect.{Blocker, ContextShift, Sync}
 import fs2.{Stream, io, text}
-import org.log4s.getLogger
 
 import scala.jdk.CollectionConverters._
-import docspell.common.syntax.all._
 
 object SystemCommand {
-  private[this] val logger = getLogger
 
   final case class Config(program: String, args: Seq[String], timeout: Duration) {
 
@@ -33,17 +30,18 @@ object SystemCommand {
   def exec[F[_]: Sync: ContextShift](
       cmd: Config,
       blocker: Blocker,
+      logger: Logger[F],
       wd: Option[Path] = None,
       stdin: Stream[F, Byte] = Stream.empty
   ): Stream[F, Result] =
-    startProcess(cmd, wd, stdin) { proc =>
+    startProcess(cmd, wd, logger, stdin) { proc =>
       Stream.eval {
         for {
           _    <- writeToProcess(stdin, proc, blocker)
           term <- Sync[F].delay(proc.waitFor(cmd.timeout.seconds, TimeUnit.SECONDS))
-          _ <- if (term) logger.fdebug(s"Command `${cmd.cmdString}` finished: ${proc.exitValue}")
+          _ <- if (term) logger.debug(s"Command `${cmd.cmdString}` finished: ${proc.exitValue}")
               else
-                logger.fwarn(
+                logger.warn(
                   s"Command `${cmd.cmdString}` did not finish in ${cmd.timeout.formatExact}!"
                 )
           _   <- if (!term) timeoutError(proc, cmd) else Sync[F].pure(())
@@ -56,10 +54,11 @@ object SystemCommand {
   def execSuccess[F[_]: Sync: ContextShift](
       cmd: Config,
       blocker: Blocker,
+      logger: Logger[F],
       wd: Option[Path] = None,
       stdin: Stream[F, Byte] = Stream.empty
   ): Stream[F, Result] =
-    exec(cmd, blocker, wd, stdin).flatMap { r =>
+    exec(cmd, blocker, logger, wd, stdin).flatMap { r =>
       if (r.rc != 0)
         Stream.raiseError[F](
           new Exception(
@@ -69,10 +68,10 @@ object SystemCommand {
       else Stream.emit(r)
     }
 
-  private def startProcess[F[_]: Sync, A](cmd: Config, wd: Option[Path], stdin: Stream[F, Byte])(
+  private def startProcess[F[_]: Sync, A](cmd: Config, wd: Option[Path], logger: Logger[F], stdin: Stream[F, Byte])(
       f: Process => Stream[F, A]
   ): Stream[F, A] = {
-    val log = logger.fdebug(s"Running external command: ${cmd.cmdString}")
+    val log = logger.debug(s"Running external command: ${cmd.cmdString}")
     val hasStdin = stdin.take(1).compile.last.map(_.isDefined)
     val proc = log *> hasStdin.flatMap(flag => Sync[F].delay {
       val pb = new ProcessBuilder(cmd.toCmd.asJava)
@@ -85,7 +84,7 @@ object SystemCommand {
     })
     Stream
       .bracket(proc)(p =>
-        logger.fdebug(s"Closing process: `${cmd.cmdString}`").map { _ =>
+        logger.debug(s"Closing process: `${cmd.cmdString}`").map { _ =>
           p.destroy()
         }
       )
diff --git a/modules/convert/src/main/scala/docspell/convert/Conversion.scala b/modules/convert/src/main/scala/docspell/convert/Conversion.scala
index 96a0776d..a4605280 100644
--- a/modules/convert/src/main/scala/docspell/convert/Conversion.scala
+++ b/modules/convert/src/main/scala/docspell/convert/Conversion.scala
@@ -6,17 +6,17 @@ import docspell.common._
 
 trait Conversion[F[_]] {
 
-  def toPDF(inType: MimeType): Pipe[F, Byte, Byte]
+  def toPDF[A](in: Stream[F, Byte], dataType: DataType, handler: Pipe[F, Byte, A]): F[ConversionResult[F]]
 
 }
 
 object Conversion {
 
-  def create[F[_]: Sync](cfg: ConvertConfig): Resource[F, Conversion[F]] =
+  def create[F[_]: Sync: ContextShift](cfg: ConvertConfig, blocker: Blocker, logger: Logger[F]): Resource[F, Conversion[F]] =
     Resource.pure(new Conversion[F] {
 
-      def toPDF(inType: MimeType): Pipe[F, Byte, Byte] = {
-        println(cfg)
+      def toPDF[A](in: Stream[F, Byte], dataType: DataType, handler: Pipe[F, Byte, A]): F[ConversionResult[F]] = {
+        println(s"$cfg $blocker $logger")
         ???
       }
 
diff --git a/modules/convert/src/main/scala/docspell/convert/ConvertConfig.scala b/modules/convert/src/main/scala/docspell/convert/ConvertConfig.scala
index 40f2924e..ddebaa23 100644
--- a/modules/convert/src/main/scala/docspell/convert/ConvertConfig.scala
+++ b/modules/convert/src/main/scala/docspell/convert/ConvertConfig.scala
@@ -1,3 +1,5 @@
 package docspell.convert
 
-case class ConvertConfig()
+import docspell.convert.flexmark.MarkdownConfig
+
+case class ConvertConfig(markdown: MarkdownConfig)
diff --git a/modules/convert/src/main/scala/docspell/convert/extern/ExternConv.scala b/modules/convert/src/main/scala/docspell/convert/extern/ExternConv.scala
index a45f7b22..909b5b45 100644
--- a/modules/convert/src/main/scala/docspell/convert/extern/ExternConv.scala
+++ b/modules/convert/src/main/scala/docspell/convert/extern/ExternConv.scala
@@ -23,7 +23,7 @@ object ExternConv {
           cmdCfg.mapArgs(_.replace("{{outfile}}", out.toAbsolutePath.normalize.toString))
 
         SystemCommand
-          .execSuccess[F](sysCfg, blocker, Some(dir), in)
+          .execSuccess[F](sysCfg, blocker, logger, Some(dir), in)
           .flatMap(result =>
             logResult(name, result, logger) ++ readResult[F](
               out,
@@ -56,7 +56,7 @@ object ExternConv {
         (Stream.eval(logger.debug(s"Storing input to file ${inFile} for running $name")).drain ++
           Stream.eval(storeFile(in, inFile, blocker))).flatMap { _ =>
           SystemCommand
-            .execSuccess[F](sysCfg, blocker, Some(dir))
+            .execSuccess[F](sysCfg, blocker, logger, Some(dir))
             .flatMap(result =>
               logResult(name, result, logger) ++ readResult[F](
                 out,
diff --git a/modules/extract/src/main/scala/docspell/extract/Extraction.scala b/modules/extract/src/main/scala/docspell/extract/Extraction.scala
index 8ef052c8..892ef54d 100644
--- a/modules/extract/src/main/scala/docspell/extract/Extraction.scala
+++ b/modules/extract/src/main/scala/docspell/extract/Extraction.scala
@@ -46,7 +46,7 @@ object Extraction {
 
           case OcrType(_) =>
             TextExtract
-              .extractOCR(data, blocker, lang.iso3, cfg.ocr)
+              .extractOCR(data, blocker, logger, lang.iso3, cfg.ocr)
               .compile
               .lastOrError
               .attempt
diff --git a/modules/extract/src/main/scala/docspell/extract/PdfExtract.scala b/modules/extract/src/main/scala/docspell/extract/PdfExtract.scala
index 20d800bb..2058e072 100644
--- a/modules/extract/src/main/scala/docspell/extract/PdfExtract.scala
+++ b/modules/extract/src/main/scala/docspell/extract/PdfExtract.scala
@@ -19,7 +19,7 @@ object PdfExtract {
   ): F[Either[Throwable, String]] = {
 
     val runOcr =
-      TextExtract.extractOCR(in, blocker, lang.iso3, ocrCfg).compile.lastOrError
+      TextExtract.extractOCR(in, blocker, logger, lang.iso3, ocrCfg).compile.lastOrError
 
     def chooseResult(ocrStr: String, strippedStr: String) =
       if (ocrStr.length > strippedStr.length)
diff --git a/modules/extract/src/main/scala/docspell/extract/ocr/Ocr.scala b/modules/extract/src/main/scala/docspell/extract/ocr/Ocr.scala
index 4e97e928..91ba8af2 100644
--- a/modules/extract/src/main/scala/docspell/extract/ocr/Ocr.scala
+++ b/modules/extract/src/main/scala/docspell/extract/ocr/Ocr.scala
@@ -4,24 +4,23 @@ import java.nio.file.Path
 
 import cats.effect.{Blocker, ContextShift, Sync}
 import fs2.Stream
-import org.log4s._
 import docspell.common._
 
 object Ocr {
-  private[this] val logger = getLogger
 
   /** Extract the text of all pages in the given pdf file.
     */
   def extractPdf[F[_]: Sync: ContextShift](
       pdf: Stream[F, Byte],
       blocker: Blocker,
+      logger: Logger[F],
       lang: String,
       config: OcrConfig
   ): F[Option[String]] =
     File.withTempDir(config.ghostscript.workingDir, "extractpdf").use { wd =>
-      runGhostscript(pdf, config, wd, blocker)
+      runGhostscript(pdf, config, wd, blocker, logger)
         .flatMap({ tmpImg =>
-          runTesseractFile(tmpImg, blocker, lang, config)
+          runTesseractFile(tmpImg, blocker, logger, lang, config)
         })
         .fold1(_ + "\n\n\n" + _).
         compile.
@@ -33,21 +32,23 @@ object Ocr {
   def extractImage[F[_]: Sync: ContextShift](
       img: Stream[F, Byte],
       blocker: Blocker,
+      logger: Logger[F],
       lang: String,
       config: OcrConfig
   ): Stream[F, String] =
-    runTesseractStdin(img, blocker, lang, config)
+    runTesseractStdin(img, blocker, logger, lang, config)
 
   def extractPdFFile[F[_]: Sync: ContextShift](
       pdf: Path,
       blocker: Blocker,
+      logger: Logger[F],
       lang: String,
       config: OcrConfig
   ): F[Option[String]] =
     File.withTempDir(config.ghostscript.workingDir, "extractpdf").use { wd =>
-      runGhostscriptFile(pdf, config.ghostscript.command, wd, blocker)
+      runGhostscriptFile(pdf, config.ghostscript.command, wd, blocker, logger)
         .flatMap({ tif =>
-          runTesseractFile(tif, blocker, lang, config)
+          runTesseractFile(tif, blocker, logger, lang, config)
         })
         .fold1(_ + "\n\n\n" + _).
         compile.
@@ -57,10 +58,11 @@ object Ocr {
   def extractImageFile[F[_]: Sync: ContextShift](
       img: Path,
       blocker: Blocker,
+      logger: Logger[F],
       lang: String,
       config: OcrConfig
   ): Stream[F, String] =
-    runTesseractFile(img, blocker, lang, config)
+    runTesseractFile(img, blocker, logger, lang, config)
 
   /** Run ghostscript to extract all pdf pages into tiff files. The
     * files are stored to a temporary location on disk and returned.
@@ -69,7 +71,8 @@ object Ocr {
                                                                  pdf: Stream[F, Byte],
                                                                  cfg: OcrConfig,
                                                                  wd: Path,
-                                                                 blocker: Blocker
+                                                                 blocker: Blocker,
+                                                                 logger: Logger[F]
   ): Stream[F, Path] = {
     val xargs =
       if (cfg.pageRange.begin > 0)
@@ -86,7 +89,7 @@ object Ocr {
         )
       )
     SystemCommand
-      .execSuccess(cmd, blocker, wd = Some(wd), stdin = pdf)
+      .execSuccess(cmd, blocker, logger, wd = Some(wd), stdin = pdf)
       .evalMap({ _ =>
         File.listFiles(pathEndsWith(".tif"), wd)
       })
@@ -100,7 +103,8 @@ object Ocr {
       pdf: Path,
       ghostscript: SystemCommand.Config,
       wd: Path,
-      blocker: Blocker
+      blocker: Blocker,
+      logger: Logger[F]
   ): Stream[F, Path] = {
     val cmd = ghostscript.mapArgs(
       replace(
@@ -111,7 +115,7 @@ object Ocr {
       )
     )
     SystemCommand
-      .execSuccess[F](cmd, blocker, wd = Some(wd))
+      .execSuccess[F](cmd, blocker, logger, wd = Some(wd))
       .evalMap({ _ =>
         File.listFiles(pathEndsWith(".tif"), wd)
       })
@@ -128,7 +132,8 @@ object Ocr {
       img: Path,
       unpaper: SystemCommand.Config,
       wd: Path,
-      blocker: Blocker
+      blocker: Blocker,
+      logger: Logger[F]
   ): Stream[F, Path] = {
     val targetFile = img.resolveSibling("u-" + img.getFileName.toString).toAbsolutePath
     val cmd = unpaper.mapArgs(
@@ -139,7 +144,7 @@ object Ocr {
         )
       )
     )
-    SystemCommand.execSuccess[F](cmd, blocker, wd = Some(wd)).map(_ => targetFile).handleErrorWith {
+    SystemCommand.execSuccess[F](cmd, blocker, logger, wd = Some(wd)).map(_ => targetFile).handleErrorWith {
       th =>
         logger
           .warn(s"Unpaper command failed: ${th.getMessage}. Using input file for text extraction.")
@@ -153,16 +158,17 @@ object Ocr {
   private[extract] def runTesseractFile[F[_]: Sync: ContextShift](
       img: Path,
       blocker: Blocker,
+      logger: Logger[F],
       lang: String,
       config: OcrConfig
   ): Stream[F, String] =
     // tesseract cannot cope with absolute filenames
     // so use the parent as working dir
-    runUnpaperFile(img, config.unpaper.command, img.getParent, blocker).flatMap { uimg =>
+    runUnpaperFile(img, config.unpaper.command, img.getParent, blocker, logger).flatMap { uimg =>
       val cmd = config.tesseract.command.mapArgs(
         replace(Map("{{file}}" -> uimg.getFileName.toString, "{{lang}}" -> fixLanguage(lang)))
       )
-      SystemCommand.execSuccess[F](cmd, blocker, wd = Some(uimg.getParent)).map(_.stdout)
+      SystemCommand.execSuccess[F](cmd, blocker, logger, wd = Some(uimg.getParent)).map(_.stdout)
     }
 
   /** Run tesseract on the given image file and return the extracted
@@ -171,12 +177,13 @@ object Ocr {
   private[extract] def runTesseractStdin[F[_]: Sync: ContextShift](
       img: Stream[F, Byte],
       blocker: Blocker,
+      logger: Logger[F],
       lang: String,
       config: OcrConfig
   ): Stream[F, String] = {
     val cmd = config.tesseract.command
       .mapArgs(replace(Map("{{file}}" -> "stdin", "{{lang}}" -> fixLanguage(lang))))
-    SystemCommand.execSuccess(cmd, blocker, stdin = img).map(_.stdout)
+    SystemCommand.execSuccess(cmd, blocker, logger, stdin = img).map(_.stdout)
   }
 
   private def replace(repl: Map[String, String]): String => String =
diff --git a/modules/extract/src/main/scala/docspell/extract/ocr/TextExtract.scala b/modules/extract/src/main/scala/docspell/extract/ocr/TextExtract.scala
index 07238482..c2fd1678 100644
--- a/modules/extract/src/main/scala/docspell/extract/ocr/TextExtract.scala
+++ b/modules/extract/src/main/scala/docspell/extract/ocr/TextExtract.scala
@@ -10,14 +10,16 @@ object TextExtract {
   def extract[F[_]: Sync: ContextShift](
       in: Stream[F, Byte],
       blocker: Blocker,
+      logger: Logger[F],
       lang: String,
       config: OcrConfig
   ): Stream[F, String] =
-    extractOCR(in, blocker, lang, config)
+    extractOCR(in, blocker, logger, lang, config)
 
   def extractOCR[F[_]: Sync: ContextShift](
       in: Stream[F, Byte],
       blocker: Blocker,
+      logger: Logger[F],
       lang: String,
       config: OcrConfig
   ): Stream[F, String] =
@@ -28,10 +30,10 @@ object TextExtract {
           raiseError(s"File `$mt` not allowed")
 
         case MimeType.pdf =>
-          Stream.eval(Ocr.extractPdf(in, blocker, lang, config)).unNoneTerminate
+          Stream.eval(Ocr.extractPdf(in, blocker, logger, lang, config)).unNoneTerminate
 
         case mt if mt.primary == "image" =>
-          Ocr.extractImage(in, blocker, lang, config)
+          Ocr.extractImage(in, blocker, logger, lang, config)
 
         case mt =>
           raiseError(s"File `$mt` not supported")
diff --git a/modules/extract/src/test/scala/docspell/extract/ocr/TextExtractionSuite.scala b/modules/extract/src/test/scala/docspell/extract/ocr/TextExtractionSuite.scala
index e63982ca..ac2998a8 100644
--- a/modules/extract/src/test/scala/docspell/extract/ocr/TextExtractionSuite.scala
+++ b/modules/extract/src/test/scala/docspell/extract/ocr/TextExtractionSuite.scala
@@ -1,16 +1,19 @@
 package docspell.extract.ocr
 
 import cats.effect.IO
+import docspell.common.Logger
 import docspell.files.TestFiles
 import minitest.SimpleTestSuite
 
 object TextExtractionSuite extends SimpleTestSuite {
   import TestFiles._
 
+  val logger = Logger.log4s[IO](org.log4s.getLogger)
+
   test("extract english pdf") {
     ignore()
     val text = TextExtract
-      .extract[IO](letterSourceEN, blocker, "eng", OcrConfig.default)
+      .extract[IO](letterSourceEN, blocker, logger, "eng", OcrConfig.default)
       .compile
       .lastOrError
       .unsafeRunSync()
@@ -21,7 +24,7 @@ object TextExtractionSuite extends SimpleTestSuite {
     ignore()
     val expect = TestFiles.letterDEText
     val extract = TextExtract
-      .extract[IO](letterSourceDE, blocker, "deu", OcrConfig.default)
+      .extract[IO](letterSourceDE, blocker, logger, "deu", OcrConfig.default)
       .compile
       .lastOrError
       .unsafeRunSync()
diff --git a/modules/joex/src/main/scala/docspell/joex/process/TextExtraction.scala b/modules/joex/src/main/scala/docspell/joex/process/TextExtraction.scala
index 94b67109..6ab1c451 100644
--- a/modules/joex/src/main/scala/docspell/joex/process/TextExtraction.scala
+++ b/modules/joex/src/main/scala/docspell/joex/process/TextExtraction.scala
@@ -48,14 +48,15 @@ object TextExtraction {
       ocrConfig: OcrConfig,
       lang: Language,
       store: Store[F],
-      blocker: Blocker
+      blocker: Blocker,
+      logger: Logger[F]
   )(fileId: Ident): F[Option[String]] = {
     val data = store.bitpeace
       .get(fileId.id)
       .unNoneTerminate
       .through(store.bitpeace.fetchData2(RangeDef.all))
 
-    TextExtract.extract(data, blocker, lang.iso3, ocrConfig).compile.last
+    TextExtract.extract(data, blocker, logger, lang.iso3, ocrConfig).compile.last
   }
 
   private def extractTextFallback[F[_]: Sync: ContextShift](
@@ -68,7 +69,7 @@ object TextExtraction {
         ctx.logger.error(s"Cannot extract text").map(_ => None)
 
       case id :: rest =>
-        extractText[F](ocrConfig, lang, ctx.store, ctx.blocker)(id).
+        extractText[F](ocrConfig, lang, ctx.store, ctx.blocker, ctx.logger)(id).
           recoverWith({
             case ex =>
               ctx.logger.warn(s"Cannot extract text: ${ex.getMessage}. Try with converted file").