diff --git a/frontend/src/lib/editor.svelte b/frontend/src/lib/editor.svelte
index 2b2a06c..74d9ede 100644
--- a/frontend/src/lib/editor.svelte
+++ b/frontend/src/lib/editor.svelte
@@ -1,8 +1,13 @@
 <script lang="ts">
 	import { getLocalization } from '$lib/i18n';
+	import * as yup from 'yup';
+	import { dataSchema } from '$lib/jupSchemas';
 
 	const { t } = getLocalization();
 
+	let schemaInvalid = false;
+	let yupErrorMessage = '';
+
 	interface Data {
 		public: boolean;
 		title: string;
@@ -38,6 +43,18 @@
 		]
 	};
 
+	const validateInput = async (data: Data) => {
+		try {
+			await dataSchema.validate(data, { abortEarly: false });
+			schemaInvalid = false;
+			yupErrorMessage = '';
+		} catch (err) {
+			schemaInvalid = true;
+			yupErrorMessage = err.errors[0];
+		}
+	};
+	$: validateInput(data);
+
 	const checkIfAllQuestionImagesComplyWithRegex = (questions: Array<Question>) => {
 		let NoteverythingValid = false;
 		// const regex = /^https:\/\/i\.imgur\.com\/.{7}.(jpg|png|gif)$/;
@@ -73,6 +90,9 @@
 		placeholder={$t('words.title')}
 		bind:value={data.title}
 		class="text-black bg-inherit border-dotted border-b-2 border-black w-full"
+		class:border-red-600={!yup.reach(dataSchema, 'title').isValidSync(data.title)}
+		class:border-solid={!yup.reach(dataSchema, 'title').isValidSync(data.title)}
+		class:border-2={!yup.reach(dataSchema, 'title').isValidSync(data.title)}
 	/>
 </label>
 <label class="pl-2 flex flex-row gap-2 w-3/5">
@@ -81,6 +101,9 @@
 		placeholder={$t('words.description')}
 		bind:value={data.description}
 		class="text-black w-full"
+		class:border-red-600={!yup.reach(dataSchema, 'description').isValidSync(data.description)}
+		class:border-solid={!yup.reach(dataSchema, 'description').isValidSync(data.description)}
+		class:border-2={!yup.reach(dataSchema, 'description').isValidSync(data.description)}
 	/>
 </label>
 {#each data.questions as question, index_question}
@@ -94,6 +117,15 @@
 				placeholder={$t('words.question')}
 				bind:value={question.question}
 				class="text-black w-full bg-inherit border-dotted border-b-2 border-black"
+				class:border-red-600={!yup
+					.reach(dataSchema, 'questions[].question')
+					.isValidSync(question.question)}
+				class:border-solid={!yup
+					.reach(dataSchema, 'questions[].question')
+					.isValidSync(question.question)}
+				class:border-2={!yup
+					.reach(dataSchema, 'questions[].question')
+					.isValidSync(question.question)}
 			/>
 		</label>
 		<label class="m-1 flex flex-row gap-2 w-3/5">
@@ -103,6 +135,15 @@
 				placeholder="https://i.imgur.com/kSPCidY.png"
 				bind:value={question.image}
 				class="text-black w-full bg-inherit border-dotted border-b-2 border-black"
+				class:border-red-600={!yup
+					.reach(dataSchema, 'questions[].image')
+					.isValidSync(question.image)}
+				class:border-solid={!yup
+					.reach(dataSchema, 'questions[].image')
+					.isValidSync(question.image)}
+				class:border-2={!yup
+					.reach(dataSchema, 'questions[].image')
+					.isValidSync(question.image)}
 			/>
 		</label>
 		<label class="m-1 flex flex-row gap-2 w-3/5 flex-nowrap whitespace-nowrap">
@@ -112,6 +153,15 @@
 				placeholder="20"
 				bind:value={question.time}
 				class="text-black w-full bg-inherit border-dotted border-b-2 border-black"
+				class:border-red-600={!yup
+					.reach(dataSchema, 'questions[].time')
+					.isValidSync(question.time)}
+				class:border-solid={!yup
+					.reach(dataSchema, 'questions[].time')
+					.isValidSync(question.time)}
+				class:border-2={!yup
+					.reach(dataSchema, 'questions[].time')
+					.isValidSync(question.time)}
 			/>
 		</label>
 		{#each question.answers as answer, index_answer}
@@ -128,6 +178,21 @@
 						placeholder={$t('words.answer')}
 						bind:value={data.questions[index_question].answers[index_answer].answer}
 						class="text-black w-full bg-inherit border-dotted border-b-2 border-black"
+						class:border-red-600={!yup
+							.reach(dataSchema, 'questions[].answers[].answer')
+							.isValidSync(
+								data.questions[index_question].answers[index_answer].answer
+							)}
+						class:border-solid={!yup
+							.reach(dataSchema, 'questions[].answers[].answer')
+							.isValidSync(
+								data.questions[index_question].answers[index_answer].answer
+							)}
+						class:border-2={!yup
+							.reach(dataSchema, 'questions[].answers[].answer')
+							.isValidSync(
+								data.questions[index_question].answers[index_answer].answer
+							)}
 					/>
 				</label>
 				<label class="m-1 flex flex-row gap-2 w-2/6 flex-nowrap whitespace-nowrap">
@@ -186,8 +251,13 @@
 		{$t('editor.not_all_links_imgur_links')}
 	</p>
 {/if}
+{#if schemaInvalid}
+	<p class="text-blue-600 text-xl text-center w-fit mx-auto">
+		{yupErrorMessage}
+	</p>
+{/if}
 <button
 	type="submit"
 	class="text-xl disabled:cursor-not-allowed disabled:border disabled:border-red-500 w-fit mx-auto"
-	disabled={imgur_links_valid}>{submit_button_text}</button
+	disabled={imgur_links_valid || schemaInvalid}>{submit_button_text}</button
 >
diff --git a/frontend/src/lib/jupSchemas.ts b/frontend/src/lib/jupSchemas.ts
new file mode 100644
index 0000000..da53d68
--- /dev/null
+++ b/frontend/src/lib/jupSchemas.ts
@@ -0,0 +1,43 @@
+import * as yup from 'yup';
+
+export const dataSchema = yup.object({
+	public: yup.boolean().required(),
+	title: yup
+		.string()
+		.required('A title is required')
+		.min(3, 'The title has to be longer than 3 characters')
+		.max(300, 'The title has to be shorter than 300 characters'),
+	description: yup
+		.string()
+		.required()
+		.min(3, 'The title has to be longer than 3 characters')
+		.max(300, 'The title has to be shorter than 300 characters'),
+	questions: yup
+		.array()
+		.of(
+			yup.object({
+				question: yup.string().required('A question is required').max(299),
+				time: yup.number().required().positive('The time has to be positive'),
+				image: yup
+					.string()
+					.nullable()
+					.matches(
+						/^(http(|s):\/\/.*(|:)\d*\/api\/v1\/storage\/download\/.{36}--.{36}|https:\/\/i\.imgur\.com\/.{7}.(jpg|png|gif))$|^$/,
+						"The image-url isn't valid"
+					)
+					.lowercase(),
+				answers: yup
+					.array()
+					.of(
+						yup.object({
+							right: yup.boolean().required(),
+							answer: yup.string().required('You need an answer')
+						})
+					)
+					.min(2, 'You need at least 2 answers')
+					.max(16, "You can't have more than 16 answers")
+			})
+		)
+		.min(1, 'You need at least one question')
+		.max(50, "You can't have more than 32 questions")
+});
diff --git a/frontend/src/routes/create.svelte b/frontend/src/routes/create.svelte
index 59c6adc..175ab56 100644
--- a/frontend/src/routes/create.svelte
+++ b/frontend/src/routes/create.svelte
@@ -32,6 +32,7 @@
 	import Editor from '$lib/editor.svelte';
 	import { getLocalization } from '$lib/i18n';
 	import { navbarVisible } from '$lib/stores';
+	import { dataSchema } from '$lib/jupSchemas';
 
 	navbarVisible.set(true);
 
@@ -76,6 +77,9 @@
 	});
 
 	const submit = async () => {
+		if (!(await dataSchema.isValid(data))) {
+			return;
+		}
 		const res = await fetch('/api/v1/quiz/create', {
 			method: 'POST',
 			body: JSON.stringify(data),
diff --git a/frontend/src/routes/edit.svelte b/frontend/src/routes/edit.svelte
index 1f8cc64..b45768e 100644
--- a/frontend/src/routes/edit.svelte
+++ b/frontend/src/routes/edit.svelte
@@ -30,6 +30,7 @@
 	import Editor from '$lib/editor.svelte';
 	import { getLocalization } from '$lib/i18n';
 	import { navbarVisible } from '$lib/stores';
+	import { dataSchema } from '$lib/jupSchemas';
 
 	navbarVisible.set(true);
 
@@ -72,6 +73,9 @@
 		}
 	};
 	const submit = async () => {
+		if (!(await dataSchema.isValid(data))) {
+			return;
+		}
 		const res = await fetch(`/api/v1/quiz/update/${quiz_id}`, {
 			method: 'PUT',
 			body: JSON.stringify(data),