diff --git a/backend/api/src/llm-extract-profile.ts b/backend/api/src/llm-extract-profile.ts
index ae23c64c..bde3f0be 100644
--- a/backend/api/src/llm-extract-profile.ts
+++ b/backend/api/src/llm-extract-profile.ts
@@ -18,6 +18,7 @@ import {
 import {debug} from 'common/logger'
 import {ProfileWithoutUser} from 'common/profiles/profile'
 import {SITE_ORDER} from 'common/socials'
+import {removeNullOrUndefinedProps} from 'common/util/object'
 import {parseJsonContentToText} from 'common/util/parse'
 import {createHash} from 'crypto'
 import {promises as fs} from 'fs'
@@ -249,7 +250,7 @@ TASK: Extract structured profile data and return it as a single valid JSON objec
 
 RULES:
 - Only extract information that is EXPLICITLY stated — do not infer, guess, or hallucinate
-- Return null for missing fields
+- Omit the key in the output for missing fields
 - For taxonomy fields (interests, causes, work): match existing labels first; only add a new label if truly no existing one is close
 - For big5 scores: only populate if the person explicitly states a test result — never infer from personality description
 - Return valid JSON only — no markdown, no explanation, no extra text
@@ -282,7 +283,8 @@ TEXT TO ANALYZE:
 
   let parsed: Partial<ProfileWithoutUser>
   try {
-    parsed = JSON.parse(outputText)
+    parsed = typeof outputText === 'string' ? JSON.parse(outputText) : outputText
+    parsed = removeNullOrUndefinedProps(parsed)
   } catch (parseError) {
     log('Failed to parse LLM response as JSON', {outputText, parseError})
     throw APIErrors.internalServerError('Failed to parse extracted data')
diff --git a/web/components/optional-profile-form.tsx b/web/components/optional-profile-form.tsx
index 283030cc..eae0c194 100644
--- a/web/components/optional-profile-form.tsx
+++ b/web/components/optional-profile-form.tsx
@@ -18,6 +18,7 @@ import {isUrl} from 'common/parsing'
 import {MultipleChoiceOptions} from 'common/profiles/multiple-choice'
 import {Profile, ProfileWithoutUser} from 'common/profiles/profile'
 import {BaseUser} from 'common/user'
+import {removeNullOrUndefinedProps} from 'common/util/object'
 import {urlize} from 'common/util/string'
 import {invert, range} from 'lodash'
 import {useRef, useState} from 'react'
@@ -95,7 +96,7 @@ export const OptionalProfileUserForm = (props: {
       const payload = isInputUrl ? {url: urlize(llmContent).trim()} : {content: llmContent.trim()}
 
       const extracted = await api('llm-extract-profile', payload)
-      for (const data of Object.entries(extracted)) {
+      for (const data of Object.entries(removeNullOrUndefinedProps(extracted))) {
         const key = data[0]
         let value = data[1]
         let choices, setChoices: any