diff --git a/src-tauri/src/analytics.rs b/src-tauri/src/analytics.rs
index def675d9..f44504ef 100644
--- a/src-tauri/src/analytics.rs
+++ b/src-tauri/src/analytics.rs
@@ -182,7 +182,7 @@ pub async fn track_event(
 
     // Disable analytics actual sending in dev
     if is_dev() {
-        debug!("track: {} {} {:?}", event, attributes_json, params);
+        // debug!("track: {} {} {:?}", event, attributes_json, params);
         return;
     }
 
diff --git a/src-tauri/src/http.rs b/src-tauri/src/http.rs
index 9c354d11..78672af6 100644
--- a/src-tauri/src/http.rs
+++ b/src-tauri/src/http.rs
@@ -259,7 +259,6 @@ pub async fn send_http_request(
                     return response_err(response, e, window).await;
                 }
             }
-            
         } else if body_type == "multipart/form-data" && request_body.contains_key("form") {
             let mut multipart_form = multipart::Form::new();
             if let Some(form_definition) = request_body.get("form") {
@@ -269,12 +268,13 @@ pub async fn send_http_request(
                         .unwrap_or(empty_bool)
                         .as_bool()
                         .unwrap_or(false);
-                    let name = p
+                    let name_raw = p
                         .get("name")
                         .unwrap_or(empty_string)
                         .as_str()
                         .unwrap_or_default();
-                    if !enabled || name.is_empty() {
+
+                    if !enabled || name_raw.is_empty() {
                         continue;
                     }
 
@@ -283,24 +283,41 @@ pub async fn send_http_request(
                         .unwrap_or(empty_string)
                         .as_str()
                         .unwrap_or_default();
-                    let value = p
+                    let value_raw = p
                         .get("value")
                         .unwrap_or(empty_string)
                         .as_str()
                         .unwrap_or_default();
-                    multipart_form = multipart_form.part(
-                        render::render(name, &workspace, environment_ref),
-                        match !file.is_empty() {
-                            true => {
-                                multipart::Part::bytes(fs::read(file).map_err(|e| e.to_string())?)
+
+                    let name = render::render(name_raw, &workspace, environment_ref);
+                    let part = if file.is_empty() {
+                        multipart::Part::text(render::render(
+                            value_raw,
+                            &workspace,
+                            environment_ref,
+                        ))
+                    } else {
+                        match fs::read(file) {
+                            Ok(f) => multipart::Part::bytes(f),
+                            Err(e) => {
+                                return response_err(response, e.to_string(), window).await;
                             }
-                            false => multipart::Part::text(render::render(
-                                value,
-                                &workspace,
-                                environment_ref,
-                            )),
-                        },
-                    );
+                        }
+                    };
+
+                    let ct_raw = p
+                        .get("contentType")
+                        .unwrap_or(empty_string)
+                        .as_str()
+                        .unwrap_or_default();
+
+                    multipart_form = multipart_form.part(name, if ct_raw.is_empty() {
+                        part
+                    } else {
+                        let ct = render::render(ct_raw, &workspace, environment_ref);
+                        println!("CT: {}", ct);
+                        part.mime_str(ct.as_str()).map_err(|e| e.to_string())?
+                    });
                 }
             }
             headers.remove("Content-Type"); // reqwest will add this automatically
diff --git a/src-web/components/FormMultipartEditor.tsx b/src-web/components/FormMultipartEditor.tsx
index 430529cf..0ef51048 100644
--- a/src-web/components/FormMultipartEditor.tsx
+++ b/src-web/components/FormMultipartEditor.tsx
@@ -16,6 +16,7 @@ export function FormMultipartEditor({ body, forceUpdateKey, onChange }: Props) {
         enabled: p.enabled,
         name: p.name,
         value: p.file ?? p.value,
+        contentType: p.contentType,
         isFile: !!p.file,
       })),
     [body.form],
@@ -27,6 +28,7 @@ export function FormMultipartEditor({ body, forceUpdateKey, onChange }: Props) {
         form: pairs.map((p) => ({
           enabled: p.enabled,
           name: p.name,
+          contentType: p.contentType,
           file: p.isFile ? p.value : undefined,
           value: p.isFile ? undefined : p.value,
         })),
diff --git a/src-web/components/GrpcConnectionSetupPane.tsx b/src-web/components/GrpcConnectionSetupPane.tsx
index 83be560c..b607827a 100644
--- a/src-web/components/GrpcConnectionSetupPane.tsx
+++ b/src-web/components/GrpcConnectionSetupPane.tsx
@@ -195,7 +195,6 @@ export function GrpcConnectionSetupPane({
               shortLabel: o.label,
             }))}
             extraItems={[
-              { type: 'separator' },
               {
                 label: 'Refresh',
                 type: 'default',
diff --git a/src-web/components/core/PairEditor.tsx b/src-web/components/core/PairEditor.tsx
index e3a3f33a..4046336c 100644
--- a/src-web/components/core/PairEditor.tsx
+++ b/src-web/components/core/PairEditor.tsx
@@ -5,6 +5,7 @@ import { Fragment, memo, useCallback, useEffect, useMemo, useRef, useState } fro
 import type { XYCoord } from 'react-dnd';
 import { useDrag, useDrop } from 'react-dnd';
 import { v4 as uuid } from 'uuid';
+import { usePrompt } from '../../hooks/usePrompt';
 import { DropMarker } from '../DropMarker';
 import { Button } from './Button';
 import { Checkbox } from './Checkbox';
@@ -14,6 +15,7 @@ import { Icon } from './Icon';
 import { IconButton } from './IconButton';
 import type { InputProps } from './Input';
 import { Input } from './Input';
+import { RadioDropdown } from './RadioDropdown';
 
 export type PairEditorProps = {
   pairs: Pair[];
@@ -37,6 +39,7 @@ export type Pair = {
   enabled?: boolean;
   name: string;
   value: string;
+  contentType?: string;
   isFile?: boolean;
 };
 
@@ -254,6 +257,7 @@ const FormRow = memo(function FormRow({
 }: FormRowProps) {
   const { id } = pairContainer;
   const ref = useRef<HTMLDivElement>(null);
+  const prompt = usePrompt();
   const nameInputRef = useRef<EditorView>(null);
 
   useEffect(() => {
@@ -283,6 +287,11 @@ const FormRow = memo(function FormRow({
     [onChange, id, pairContainer.pair],
   );
 
+  const handleChangeValueContentType = useMemo(
+    () => (contentType: string) => onChange({ id, pair: { ...pairContainer.pair, contentType } }),
+    [onChange, id, pairContainer.pair],
+  );
+
   const handleFocus = useCallback(() => onFocus?.(pairContainer), [onFocus, pairContainer]);
   const handleDelete = useCallback(
     () => onDelete?.(pairContainer, false),
@@ -408,34 +417,67 @@ const FormRow = memo(function FormRow({
               autocompleteVariables={valueAutocompleteVariables}
             />
           )}
-          {allowFileValues && (
-            <Dropdown
-              items={[
-                { key: 'text', label: 'Text', onSelect: () => handleChangeValueText('') },
-                { key: 'file', label: 'File', onSelect: () => handleChangeValueFile('') },
-              ]}
-            >
-              <IconButton
-                iconSize="sm"
-                size="xs"
-                icon={isLast ? 'empty' : 'chevronDown'}
-                title="Select form data type"
-              />
-            </Dropdown>
-          )}
         </div>
       </div>
-      <IconButton
-        aria-hidden={isLast}
-        disabled={isLast}
-        color="custom"
-        icon={!isLast ? 'trash' : 'empty'}
-        size="sm"
-        iconSize="sm"
-        title="Delete header"
-        onClick={!isLast ? handleDelete : undefined}
-        className="ml-0.5 opacity-0 group-hover:!opacity-100 focus-visible:!opacity-100"
-      />
+      {allowFileValues ? (
+        <RadioDropdown
+          value={pairContainer.pair.isFile ? 'file' : 'text'}
+          onChange={(v) => {
+            if (v === 'file') handleChangeValueFile('');
+            else handleChangeValueText('');
+          }}
+          items={[
+            { label: 'Text', value: 'text' },
+            { label: 'File', value: 'file' },
+          ]}
+          extraItems={[
+            {
+              key: 'mime',
+              label: 'Set Content-Type',
+              leftSlot: <Icon icon="pencil" />,
+              onSelect: async () => {
+                const v = await prompt({
+                  id: 'content-type',
+                  require: false,
+                  title: 'Override Content-Type',
+                  label: 'Content-Type',
+                  placeholder: 'text/plain',
+                  defaultValue: pairContainer.pair.contentType ?? '',
+                  name: 'content-type',
+                  confirmLabel: 'Set',
+                  description: 'Leave blank to auto-detect',
+                });
+                handleChangeValueContentType(v);
+              },
+            },
+            {
+              key: 'delete',
+              label: 'Delete',
+              onSelect: handleDelete,
+              variant: 'danger',
+              leftSlot: <Icon icon="trash" />,
+            },
+          ]}
+        >
+          <IconButton
+            iconSize="sm"
+            size="xs"
+            icon={isLast ? 'empty' : 'chevronDown'}
+            title="Select form data type"
+          />
+        </RadioDropdown>
+      ) : (
+        <Dropdown
+          items={[{ key: 'delete', label: 'Delete', onSelect: handleDelete, variant: 'danger' }]}
+        >
+          <IconButton
+            iconSize="sm"
+            size="xs"
+            icon={isLast ? 'empty' : 'chevronDown'}
+            title="Select form data type"
+          />
+        </Dropdown>
+      )}
     </div>
   );
 });
diff --git a/src-web/components/core/RadioDropdown.tsx b/src-web/components/core/RadioDropdown.tsx
index 7454da80..155ade41 100644
--- a/src-web/components/core/RadioDropdown.tsx
+++ b/src-web/components/core/RadioDropdown.tsx
@@ -1,5 +1,5 @@
 import { useMemo } from 'react';
-import type { DropdownItemSeparator, DropdownProps } from './Dropdown';
+import type { DropdownItem, DropdownItemSeparator, DropdownProps } from './Dropdown';
 import { Dropdown } from './Dropdown';
 import { Icon } from './Icon';
 
@@ -42,7 +42,7 @@ export function RadioDropdown<T = string | null>({
           };
         }
       }),
-      ...(extraItems ?? []),
+      ...((extraItems ? [{ type: 'separator' }, ...extraItems] : []) as DropdownItem[]),
     ],
     [items, extraItems, value, onChange],
   );
diff --git a/src-web/hooks/Prompt.tsx b/src-web/hooks/Prompt.tsx
index 3c9f1b22..fa71a4fe 100644
--- a/src-web/hooks/Prompt.tsx
+++ b/src-web/hooks/Prompt.tsx
@@ -12,6 +12,7 @@ export interface PromptProps {
   name: InputProps['name'];
   defaultValue: InputProps['defaultValue'];
   placeholder: InputProps['placeholder'];
+  require?: InputProps['require'];
   confirmLabel?: string;
 }
 
@@ -22,6 +23,7 @@ export function Prompt({
   defaultValue,
   placeholder,
   onResult,
+  require = true,
   confirmLabel = 'Save',
 }: PromptProps) {
   const [value, setValue] = useState<string>(defaultValue ?? '');
@@ -41,7 +43,7 @@ export function Prompt({
     >
       <Input
         hideLabel
-        require
+        require={require}
         autoSelect
         placeholder={placeholder}
         label={label}
diff --git a/src-web/hooks/usePrompt.ts b/src-web/hooks/usePrompt.ts
index 5e05fa79..98ba9f0a 100644
--- a/src-web/hooks/usePrompt.ts
+++ b/src-web/hooks/usePrompt.ts
@@ -14,6 +14,7 @@ export function usePrompt() {
     defaultValue,
     placeholder,
     confirmLabel,
+    require,
   }: Pick<DialogProps, 'title' | 'description'> &
     Omit<PromptProps, 'onResult' | 'onHide'> & { id: string }) =>
     new Promise((onResult: PromptProps['onResult']) => {
@@ -24,7 +25,16 @@ export function usePrompt() {
         hideX: true,
         size: 'sm',
         render: ({ hide }) =>
-          Prompt({ onHide: hide, onResult, name, label, defaultValue, placeholder, confirmLabel }),
+          Prompt({
+            onHide: hide,
+            onResult,
+            name,
+            label,
+            defaultValue,
+            placeholder,
+            confirmLabel,
+            require,
+          }),
       });
     });
 }