diff --git a/client/app.tsx b/client/app.tsx
index 61b5a12..e43453b 100644
--- a/client/app.tsx
+++ b/client/app.tsx
@@ -6,6 +6,9 @@ import { siteDb } from './site_db_manual.ts'
 //! Get datas manually (site_db_manual.ts)
 // const siteDb = await fetchDbFromSite('https://www.pierregrangepraderas.net/')
 
+/**
+ * Main content
+ */
 export function App() {
 	return (
 		<main>
diff --git a/client/db_graph.tsx b/client/db_graph.tsx
index c270886..f6bb2a9 100644
--- a/client/db_graph.tsx
+++ b/client/db_graph.tsx
@@ -2,6 +2,10 @@ import { Ref, useEffect, useRef } from 'preact/hooks'
 import * as vis from 'vis-network'
 import { DbEntry } from '../datas.ts'
 
+/**
+ * Renders a network style graph based on the provided database entries.
+ * @param db - Datas that will be used to draw the graph.
+ */
 export function DbGraph({ db }: { db: DbEntry[] }) {
 	const graph = useRef<HTMLDivElement>(null)
 
@@ -12,17 +16,26 @@ export function DbGraph({ db }: { db: DbEntry[] }) {
 	return <div class='graph' ref={graph}></div>
 }
 
+/**
+ * Draw db entries as vis network graph.
+ * @param db - DB Entries.
+ * @param graph - Container html reference.
+ */
 function drawDb({ db, graph }: { db: DbEntry[]; graph: Ref<HTMLDivElement> }) {
+
+	//Convert db entries to "vis-network" nodes
 	const nodes = db.map(({ id, title, links }) => ({
 		id,
 		label: title,
 		value: links.length,
 	}))
 
+	//Construct "vis-network" edges from db entries
 	const edges = db.map(({ id, links }) =>
 		links.map((link) => ({ from: id, to: link, value: id + link }))
 	).flat()
 
+	//Draw the network graph
 	return new vis.Network(graph.current!, {
 		nodes,
 		edges,
diff --git a/client/fetch_db_from_site.ts b/client/fetch_db_from_site.ts
index 4804b17..f5a5f71 100644
--- a/client/fetch_db_from_site.ts
+++ b/client/fetch_db_from_site.ts
@@ -2,11 +2,18 @@ import { DbEntry } from '../datas.ts'
 
 const domParser = new DOMParser()
 
+/**
+ * Construct db by scrapping site.
+ * @param siteUrl - Index page url
+ * @returns DbEntries[]
+ */
 export async function fetchDbFromSite(siteUrl: string) {
+	//Index page
 	const index = await fetch(siteUrl, { mode: 'no-cors' })
 		.then((response) => response.text())
 		.then((raw) => domParser.parseFromString(raw, 'text/html'))
 
+	//Get nodes from index page links
 	const nodes = Array.from(
 		index.querySelectorAll<HTMLAnchorElement>('#episodes>a'),
 	)
@@ -14,6 +21,7 @@ export async function fetchDbFromSite(siteUrl: string) {
 
 	const db: DbEntry[] = []
 
+	//Fill db with nodes
 	for (const node of nodes) {
 		const id = getNodeId(node)
 		const title = node.title
@@ -26,12 +34,20 @@ export async function fetchDbFromSite(siteUrl: string) {
 	return db
 }
 
-function getNodeId({ href }: { href: string }) {
+/**
+ * Determine id from node link href attribute.
+ * @returns node id
+ */
+function getNodeId({ href }: { href: string }): number {
 	const { pathname } = new URL(href)
 	return Number.parseInt(pathname.slice(1, -5))
 }
 
-async function getNodeLinks({ href }: { href: string }) {
+/**
+ * Get ids of nodes related to current nodes by listing all links in current node web page.
+ * @returns List of ids related to current node.
+ */
+async function getNodeLinks({ href }: { href: string }): Promise<number[]> {
 	const page = await fetch(href, { mode: 'no-cors' })
 		.then((response) => response.text())
 		.then((raw) => domParser.parseFromString(raw, 'text/html'))
diff --git a/client/site_db_manual.ts b/client/site_db_manual.ts
index bb567d3..7d78162 100644
--- a/client/site_db_manual.ts
+++ b/client/site_db_manual.ts
@@ -1,5 +1,7 @@
 import { DbEntry } from '../datas.ts'
 
+//! Manually fecthed datas
+//! Output of `const db = await fetchDbFromSite('https://www.pierregrangepraderas.net')` run in console from the site.
 export const siteDb: DbEntry[] = [
 	{
 		'id': 2,
diff --git a/server.tsx b/server.tsx
index d46dcd2..62c9dca 100644
--- a/server.tsx
+++ b/server.tsx
@@ -2,6 +2,7 @@ import { bundle } from 'emit'
 import ssr from 'preact-render-to-string'
 import denoConfig from './deno.json' with { type: 'json' }
 
+//Compile and bundle client script to js
 const script = await bundle('./script.tsx', {
 	minify: true,
 	type: 'module',
@@ -12,6 +13,9 @@ const script = await bundle('./script.tsx', {
 	'importMap': { imports: denoConfig.imports },
 })
 
+/**
+ * Page template
+ */
 function Template() {
 	return (
 		<html lang='fr'>