diff --git a/controllers/threads_controller.go b/controllers/threads_controller.go
index 8320e3b..bf22c76 100644
--- a/controllers/threads_controller.go
+++ b/controllers/threads_controller.go
@@ -244,12 +244,28 @@ func UpdateThread(c *fiber.Ctx) error {
 	// TODO: dat shit crashes if no fields in request
 	text := form.Value["text"][0]
 	filesInRequest := form.File["files"]
-	validationErrorMessage := utils.ValidatePost("", text, filesInRequest)
-	if validationErrorMessage != "" {
-		errorHtmlData := repositories.BadRequestHtmlData{
-			Message: validationErrorMessage,
+
+	validationErrors := utils.ValidatePost2("", text, filesInRequest)
+	if validationErrors != nil {
+		thread, err := repositories.Posts.GetThreadByPostID(threadID)
+		if err != nil {
+			log.Println("error:", err)
+			return c.Status(fiber.StatusInternalServerError).Render("pages/500", nil)
 		}
-		return c.Status(fiber.StatusBadRequest).Render("pages/400", errorHtmlData)
+
+		firstPost := thread[0]
+		captchaID := form.Value["captchaId"][0]
+		htmlData := repositories.GetThreadHtmlData{
+			Thread: thread,
+			FormData: repositories.HtmlFormData{
+				FirstPostID:     firstPost.ID,
+				CaptchaID:       captchaID,
+				IsCaptchaActive: config.App.IsCaptchaActive,
+				Errors:          *validationErrors,
+			},
+		}
+
+		return c.Render("pages/thread", htmlData)
 	}
 
 	if config.App.IsCaptchaActive {
diff --git a/repositories/structs.go b/repositories/structs.go
index 121f908..0dd975c 100644
--- a/repositories/structs.go
+++ b/repositories/structs.go
@@ -39,11 +39,19 @@ type File struct {
 // HTML Templates Structs
 // HTML Templates Structs
 
+// post-form.html
+type HtmlFormErrors struct {
+	Title string
+	Text  string
+	Files string
+}
+
 // post-form.html
 type HtmlFormData struct {
 	FirstPostID     int
 	CaptchaID       string
 	IsCaptchaActive bool
+	Errors          HtmlFormErrors
 }
 
 // index.html
@@ -70,11 +78,11 @@ type BadRequestHtmlData struct {
 	Message string
 }
 
-const InvalidCaptchaErrorMessage = "INVALID CAPTCHA"
-const InvalidTextOrFilesErrorMessage = "TEXT OR FILES SHOULD NOT BE EMPTY"
-const InvalidTitleLengthErrorMessage = "TITLE SHOULD NOT EXCEED 100 CHARS"
-const InvalidTextLengthErrorMessage = "TEXT SHOULD NOT EXCEED 1000 CHARS"
-const InvalidFilesLengthErrorMessage = "MAXIMUM 4 FILES CAN BE UPLOADED"
-const InvalidFileSizeErrorMessage = "FILE SIZE EXCIDED (3MB PER FILE)"
-const InvalidFileExtErrorMessage = "AVALIABLE FILE EXT: PNG, JPG"
-const ThreadIsArchivedErrorMessage = "THREAD IS ARCHIVED"
+const InvalidCaptchaErrorMessage = "Invalid captcha"
+const InvalidTextOrFilesErrorMessage = "Text or files should not be empty"
+const InvalidTitleLengthErrorMessage = "Title should not exceed 100 chars"
+const InvalidTextLengthErrorMessage = "Text should not exceed 1000 chars"
+const InvalidFilesLengthErrorMessage = "Maximum 4 files can be uploaded"
+const InvalidFileSizeErrorMessage = "File size exceeded (3MB PER FILE)"
+const InvalidFileExtErrorMessage = "Available file ext: PNG, JPG"
+const ThreadIsArchivedErrorMessage = "Thread is archived"
diff --git a/static/styles/post-form.css b/static/styles/post-form.css
index 1222f54..782d80f 100644
--- a/static/styles/post-form.css
+++ b/static/styles/post-form.css
@@ -1,3 +1,7 @@
-#postForm > * {
+.form-control {
   margin-bottom: 1rem;
+}
+
+.form-error-label {
+  color: #f00;
 }
\ No newline at end of file
diff --git a/templates/components/post-form.html b/templates/components/post-form.html
index 0bde441..78c190d 100644
--- a/templates/components/post-form.html
+++ b/templates/components/post-form.html
@@ -9,17 +9,20 @@
       {{ end }}
 
         {{ if eq .FirstPostID 0 }}
+        <label class="form-error-label" for="title">{{ .Errors.Title }}</label>
         <input class="form-control" id="postTitle" placeholder="Title" name="title">
         {{ end }}
 
+        <label class="form-error-label" for="text">{{ .Errors.Text }}</label>
         <textarea class="form-control" id="postText" rows="5" placeholder="Text" name="text"></textarea>
+        <label class="form-error-label" for="files">{{ .Errors.Files }}</label>
         <input class="form-control" type="file" id="postFiles" multiple name="files">
         
         {{ if .IsCaptchaActive }}
         {{ template "captcha" .CaptchaID }}
         {{ end }}
 
-        <div class="row">
+        <div class="row mb-4">
           {{ if ne .FirstPostID 0 }}
           <div class="col">
             <input class="form-check-input" type="checkbox" value="on" id="postSage" name="sage">
diff --git a/utils/utils.go b/utils/utils.go
index e00a325..e4b16ce 100644
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -6,7 +6,7 @@ import (
 	"image"
 	"image/jpeg"
 	"image/png"
-	Repositories "micrach/repositories"
+	"micrach/repositories"
 	"mime/multipart"
 	"os"
 	"path/filepath"
@@ -70,36 +70,81 @@ func CreateThreadFolder(postID int) error {
 	return nil
 }
 
+// TODO: Delete after
 func ValidatePost(title, text string, files []*multipart.FileHeader) string {
 	if text == "" && len(files) == 0 {
-		return Repositories.InvalidTextOrFilesErrorMessage
+		return repositories.InvalidTextOrFilesErrorMessage
 	}
 
 	if len([]rune(title)) > 100 {
-		return Repositories.InvalidTitleLengthErrorMessage
+		return repositories.InvalidTitleLengthErrorMessage
 	}
 
 	if len([]rune(text)) > 1000 {
-		return Repositories.InvalidTextLengthErrorMessage
+		return repositories.InvalidTextLengthErrorMessage
 	}
 
 	if len(files) > 4 {
-		return Repositories.InvalidFilesLengthErrorMessage
+		return repositories.InvalidFilesLengthErrorMessage
 	}
 
 	isFilesExtsValid := CheckFilesExt(files)
 	if !isFilesExtsValid {
-		return Repositories.InvalidFileExtErrorMessage
+		return repositories.InvalidFileExtErrorMessage
 	}
 
 	isFilesSizesNotToBig := CheckFilesSize(files)
 	if !isFilesSizesNotToBig {
-		return Repositories.InvalidFileSizeErrorMessage
+		return repositories.InvalidFileSizeErrorMessage
 	}
 
 	return ""
 }
 
+func ValidatePost2(title, text string, files []*multipart.FileHeader) *repositories.HtmlFormErrors {
+	validationError := new(repositories.HtmlFormErrors)
+	hasErrors := false
+
+	if text == "" && len(files) == 0 {
+		validationError.Text = repositories.InvalidTextOrFilesErrorMessage
+		validationError.Files = repositories.InvalidTextOrFilesErrorMessage
+		hasErrors = true
+	}
+
+	if len([]rune(title)) > 100 {
+		validationError.Title = repositories.InvalidTitleLengthErrorMessage
+		hasErrors = true
+	}
+
+	if len([]rune(text)) > 1000 {
+		validationError.Text = repositories.InvalidTextLengthErrorMessage
+		hasErrors = true
+	}
+
+	if len(files) > 4 {
+		validationError.Files = repositories.InvalidFilesLengthErrorMessage
+		hasErrors = true
+	}
+
+	isFilesExtsValid := CheckFilesExt(files)
+	if !isFilesExtsValid {
+		validationError.Files = repositories.InvalidFileExtErrorMessage
+		hasErrors = true
+	}
+
+	isFilesSizesNotToBig := CheckFilesSize(files)
+	if !isFilesSizesNotToBig {
+		validationError.Files = repositories.InvalidFileSizeErrorMessage
+		hasErrors = true
+	}
+
+	if hasErrors {
+		return validationError
+	}
+
+	return nil
+}
+
 func CheckFilesSize(files []*multipart.FileHeader) bool {
 	for _, file := range files {
 		if file.Size > int64(FILE_SIZE_IN_BYTES) {