diff --git a/config.go b/config.go
index 41969cb..56fd2ff 100644
--- a/config.go
+++ b/config.go
@@ -6,7 +6,7 @@ import (
 
 	// Standard
 	"errors"
-	"io/ioutil"
+	"os"
 )
 
 
@@ -37,7 +37,7 @@ type Config struct {
 
 func ConfigRead(filename string) (config Config, err error) {
 	var rawConfigData []byte
-	rawConfigData, err = ioutil.ReadFile(filename)
+	rawConfigData, err = os.ReadFile(filename)
 	if err != nil { return }
 
 	err = yaml.Unmarshal(rawConfigData, &config)
diff --git a/connection_manager.go b/connection_manager.go
index 8f11e54..d533bf4 100644
--- a/connection_manager.go
+++ b/connection_manager.go
@@ -6,7 +6,6 @@ import (
 	"github.com/gorilla/websocket"
 
 	// Standard
-	"log"
 	"net/http"
 )
 
@@ -72,7 +71,7 @@ func (cm *ConnectionManager) NewConnection(w http.ResponseWriter, r *http.Reques
 	cm.connections[wsConn.UUID] = &wsConn
 
 	// Successfully upgraded to a websocket connection.
-	log.Printf("[%s] Connection from %s", wsConn.UUID, r.RemoteAddr)
+	logger.Info("websocket", "uuid", wsConn.UUID, "remote_addr", r.RemoteAddr)
 
 	go cm.ReadLoop(&wsConn)
 
@@ -82,9 +81,7 @@ func (cm *ConnectionManager) NewConnection(w http.ResponseWriter, r *http.Reques
 // Prune closes an deletes connections. If this happened to be non-fatal, the
 // user will just have to reconnect.
 func (cm *ConnectionManager) Prune(wsConn *WsConnection, err error) {// {{{
-	if false {
-		log.Printf("[%s] pruning connection [%s]\n", wsConn.UUID, err)
-	}
+	logger.Info("websocket", "op", "prune", "uuid", wsConn.UUID)
 	wsConn.Conn.Close()
 	wsConn.Pruned = true
 	delete(cm.connections, wsConn.UUID)
@@ -98,8 +95,7 @@ func (cm *ConnectionManager) ReadLoop(wsConn *WsConnection) {// {{{
 			break
 		}
 
-		log.Printf("%s\n", data)
-
+		logger.Debug("websocket", "op", "read", "data", data)
 		//cm.Send(wsConn, response)
 	}
 }// }}}
diff --git a/db.go b/db.go
index 7cf1e5a..c2db708 100644
--- a/db.go
+++ b/db.go
@@ -9,7 +9,6 @@ import (
 	"errors"
 	"fmt"
 	"io/fs"
-	"log"
 	"regexp"
 	"strconv"
 )
@@ -29,11 +28,7 @@ func dbInit() (err error) { // {{{
 		config.Database.Name,
 	)
 
-	log.Printf(
-		"\x1b[32mNotes\x1b[0m Connecting to database %s:%d\n",
-		config.Database.Host,
-		config.Database.Port,
-	)
+	logger.Info("db", "op", "connect", "host", config.Database.Host, "port", config.Database.Port)
 
 	if db, err = sqlx.Connect("postgres", dbConn); err != nil {
 		return
@@ -66,7 +61,7 @@ func dbVerifyInternals() (err error) { // {{{
 	}
 
 	if !exists {
-		log.Printf("\x1b[32mNotes\x1b[0m Creating _internal.db\n")
+		logger.Info("db", "op", "create_db", "db", "_internal.db")
 		if _, err = db.Exec(`
 			CREATE SCHEMA "_internal";
 
@@ -114,7 +109,7 @@ func dbUpdate() (err error) { // {{{
 	}
 	sqlSchemaVersion := sqlSchema()
 	for i := (schema + 1); i <= sqlSchemaVersion; i++ {
-		log.Printf("\x1b[32mNotes\x1b[0m Upgrading SQL schema to revision %d...", i)
+		logger.Info("db", "op", "upgrade_schema", "schema", i)
 		sql, _ := embedded.ReadFile(
 			fmt.Sprintf("sql/%04d.sql", i),
 		)
@@ -126,7 +121,7 @@ func dbUpdate() (err error) { // {{{
 		if err != nil {
 			return
 		}
-		log.Printf("\x1b[32mNotes\x1b[0m OK: %d", i)
+		logger.Info("db", "op", "upgrade_schema", "schema", i, "result", "ok")
 	}
 
 	return
diff --git a/main.go b/main.go
index c6bbc1b..6c0e611 100644
--- a/main.go
+++ b/main.go
@@ -9,7 +9,7 @@ import (
 	"fmt"
 	"html/template"
 	"io"
-	"log"
+	"log/slog"
 	"net/http"
 	"os"
 	"path"
@@ -30,6 +30,7 @@ var (
 	connectionManager ConnectionManager
 	static            http.Handler
 	config            Config
+	logger            *slog.Logger
 	VERSION           string
 
 	//go:embed version sql/*
@@ -40,6 +41,9 @@ func init() { // {{{
 	version, _ := embedded.ReadFile("version")
 	VERSION = strings.TrimSpace(string(version))
 
+	opt := slog.HandlerOptions{}
+	logger = slog.New(slog.NewJSONHandler(os.Stdout, &opt))
+
 	configFilename := os.Getenv("HOME") + "/.config/notes.yaml"
 	flag.IntVar(&flagPort, "port", 1371, "TCP port to listen on")
 	flag.BoolVar(&flagVersion, "version", false, "Shows Notes version and exists")
@@ -55,23 +59,23 @@ func main() { // {{{
 		os.Exit(0)
 	}
 
-	log.Printf("\x1b[32mNotes\x1b[0m %s\n", VERSION)
+	logger.Info("application", "version", VERSION)
 
 	config, err = ConfigRead(flagConfig)
 	if err != nil {
-		fmt.Printf("%s\n", err)
+		logger.Error("config", "error", err)
 		os.Exit(1)
 	}
 
 	if err = dbInit(); err != nil {
-		fmt.Printf("%s\n", err)
+		logger.Error("db", "error", err)
 		os.Exit(1)
 	}
 
 	if flagCreateUser {
 		err = createUser()
 		if err != nil {
-			fmt.Println(err)
+			logger.Error("db", "error", err)
 			os.Exit(1)
 		}
 		os.Exit(0)
@@ -102,13 +106,12 @@ func main() { // {{{
 	http.HandleFunc("/", staticHandler)
 
 	listen := fmt.Sprintf("%s:%d", LISTEN_HOST, flagPort)
-	log.Printf("\x1b[32mNotes\x1b[0m Listening on %s\n", listen)
-	log.Printf("\x1b[32mNotes\x1b[0m Answer for domains %s\n", strings.Join(config.Websocket.Domains, ", "))
+	logger.Info("webserver", "listen", listen, "domains", config.Websocket.Domains)
 	http.ListenAndServe(listen, nil)
 } // }}}
 
 func cssUpdateHandler(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("[BROADCAST] CSS updated")
+	logger.Debug("webserver", "css", "updated")
 	connectionManager.Broadcast(struct {
 		Ok bool
 		ID string
@@ -120,7 +123,7 @@ func websocketHandler(w http.ResponseWriter, r *http.Request) { // {{{
 
 	_, err = connectionManager.NewConnection(w, r)
 	if err != nil {
-		log.Printf("[Connection] %s\n", err)
+		logger.Error("websocket", "error", err)
 		return
 	}
 } // }}}
@@ -134,7 +137,7 @@ func staticHandler(w http.ResponseWriter, r *http.Request) { // {{{
 	// URLs with pattern /(css|images)/v1.0.0/foobar are stripped of the version.
 	// To get rid of problems with cached content in browser on a new version release,
 	// while also not disabling cache altogether.
-	log.Printf("static: %s", r.URL.Path)
+	logger.Debug("webserver", "request", r.URL.Path)
 	if r.URL.Path == "/favicon.ico" {
 		static.ServeHTTP(w, r)
 		return
@@ -149,7 +152,7 @@ func staticHandler(w http.ResponseWriter, r *http.Request) { // {{{
 
 	// Everything else is run through the template system.
 	// For now to get VERSION into files to fix caching.
-	log.Printf("template: %s", r.URL.Path)
+	logger.Debug("webserver", "template", r.URL.Path)
 	tmpl, err := newTemplate(r.URL.Path)
 	if err != nil {
 		if os.IsNotExist(err) {
@@ -165,7 +168,7 @@ func staticHandler(w http.ResponseWriter, r *http.Request) { // {{{
 } // }}}
 
 func sessionCreate(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/session/create")
+	logger.Info("webserver", "request", "/session/create")
 	session, err := CreateSession()
 	if err != nil {
 		responseError(w, err)
@@ -177,7 +180,7 @@ func sessionCreate(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func sessionRetrieve(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/session/retrieve")
+	logger.Info("webserver", "request", "/session/retrieve")
 	var err error
 	var found bool
 	var session Session
@@ -194,7 +197,7 @@ func sessionRetrieve(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func sessionAuthenticate(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/session/authenticate")
+	logger.Info("webserver", "request", "/session/authenticate")
 	var err error
 	var session Session
 	var authenticated bool
@@ -284,7 +287,7 @@ func nodeTree(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func nodeRetrieve(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/node/retrieve")
+	logger.Info("webserver", "request", "/node/retrieve")
 	var err error
 	var session Session
 
@@ -311,7 +314,7 @@ func nodeRetrieve(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func nodeCreate(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/node/create")
+	logger.Info("webserver", "request", "/node/create")
 	var err error
 	var session Session
 
@@ -341,7 +344,7 @@ func nodeCreate(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func nodeUpdate(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/node/update")
+	logger.Info("webserver", "request", "/node/update")
 	var err error
 	var session Session
 
@@ -371,6 +374,8 @@ func nodeUpdate(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func nodeRename(w http.ResponseWriter, r *http.Request) { // {{{
+	logger.Info("webserver", "request", "/node/rename")
+
 	var err error
 	var session Session
 
@@ -399,6 +404,8 @@ func nodeRename(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func nodeDelete(w http.ResponseWriter, r *http.Request) { // {{{
+	logger.Info("webserver", "request", "/node/delete")
+
 	var err error
 	var session Session
 
@@ -426,7 +433,7 @@ func nodeDelete(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func nodeUpload(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/node/upload")
+	logger.Info("webserver", "request", "/node/upload")
 	var err error
 	var session Session
 
@@ -510,7 +517,7 @@ func nodeUpload(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func nodeDownload(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/node/download")
+	logger.Info("webserver", "request", "/node/download")
 	var err error
 	var session Session
 	var files []File
@@ -577,6 +584,7 @@ func nodeDownload(w http.ResponseWriter, r *http.Request) { // {{{
 
 } // }}}
 func nodeFiles(w http.ResponseWriter, r *http.Request) { // {{{
+	logger.Info("webserver", "request", "/node/files")
 	var err error
 	var session Session
 	var files []File
@@ -606,7 +614,7 @@ func nodeFiles(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func nodeSearch(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/node/search")
+	logger.Info("webserver", "request", "/node/search")
 	var err error
 	var session Session
 	var nodes []Node
@@ -637,7 +645,7 @@ func nodeSearch(w http.ResponseWriter, r *http.Request) { // {{{
 } // }}}
 
 func keyRetrieve(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/key/retrieve")
+	logger.Info("webserver", "request", "/key/retrieve")
 	var err error
 	var session Session
 
@@ -658,7 +666,7 @@ func keyRetrieve(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func keyCreate(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/key/create")
+	logger.Info("webserver", "request", "/key/create")
 	var err error
 	var session Session
 
@@ -688,7 +696,7 @@ func keyCreate(w http.ResponseWriter, r *http.Request) { // {{{
 	})
 } // }}}
 func keyCounter(w http.ResponseWriter, r *http.Request) { // {{{
-	log.Println("/key/counter")
+	logger.Info("webserver", "request", "/key/counter")
 	var err error
 	var session Session