diff --git a/go-util/cmd/gitea-delete-orgs/main.go b/go-util/cmd/gitea-delete-orgs/main.go
index 5a52701..c97ea9b 100644
--- a/go-util/cmd/gitea-delete-orgs/main.go
+++ b/go-util/cmd/gitea-delete-orgs/main.go
@@ -9,7 +9,7 @@ import (
 	"os"
 	"strings"
 
-	_ "github.com/tiennm99/go-util/internal/env"
+	_ "github.com/tiennm99/mttools/go-util/internal/env"
 )
 
 // org represents a Gitea organization.
diff --git a/go-util/go.mod b/go-util/go.mod
index a2eae01..8cb5d97 100644
--- a/go-util/go.mod
+++ b/go-util/go.mod
@@ -1,4 +1,4 @@
-module github.com/tiennm99/go-util
+module github.com/tiennm99/mttools/go-util
 
 go 1.26.1
 
diff --git a/go-util/internal/env/load.go b/go-util/internal/env/load.go
index be96049..998f465 100644
--- a/go-util/internal/env/load.go
+++ b/go-util/internal/env/load.go
@@ -1,5 +1,5 @@
 // Package env loads .env files on init so all cmd/ scripts get env vars automatically.
-// Usage: import _ "github.com/tiennm99/go-util/internal/env"
+// Usage: import _ "github.com/tiennm99/mttools/go-util/internal/env"
 package env
 
 import (
diff --git a/image-resizer/README.md b/image-resizer/README.md
index 153de3b..62e149c 100644
--- a/image-resizer/README.md
+++ b/image-resizer/README.md
@@ -50,7 +50,7 @@ Aspect ratio is always preserved — the scale percentage applies uniformly to b
 
 ## Related
 
-- [webp-converter](https://github.com/tiennm99/webp-converter) — converts WebP images to PNG/JPG (same domain, different operation).
+- [webp-converter](../webp-converter/) — converts WebP images to PNG/JPG (same domain, different operation).
 
 ## License
 
diff --git a/webp-converter/README.md b/webp-converter/README.md
index 93e406b..e4fe22d 100644
--- a/webp-converter/README.md
+++ b/webp-converter/README.md
@@ -40,7 +40,7 @@ curl -X POST http://localhost:8080/process \
 
 ## Related
 
-- [image-resizer](https://github.com/tiennm99/image-resizer) — batch-resize images by percentage (same domain, different operation).
+- [image-resizer](../image-resizer/) — batch-resize images by percentage (same domain, different operation).
 
 ## License
 
diff --git a/webp-converter/go.mod b/webp-converter/go.mod
index 7662576..7a57407 100644
--- a/webp-converter/go.mod
+++ b/webp-converter/go.mod
@@ -1,4 +1,4 @@
-module github.com/tiennm99/webp-converter
+module github.com/tiennm99/mttools/webp-converter
 
 go 1.25.0
 
diff --git a/webp-converter/webp-converter b/webp-converter/webp-converter
new file mode 100755
index 0000000..549c9d1
Binary files /dev/null and b/webp-converter/webp-converter differ