diff --git a/web/css/playground.css b/web/css/playground.css
index 641c230e..5e4d2ea5 100644
--- a/web/css/playground.css
+++ b/web/css/playground.css
@@ -166,4 +166,9 @@ p{
     padding: 8px 0px 0px 25px;
     background: none;
     border: none;
+}
+
+#annotationOutput {
+    white-space: pre-wrap;
+    text-align: left !important;
 }
\ No newline at end of file
diff --git a/web/js/toolsCatalog.js b/web/js/toolsCatalog.js
index c85ac20e..71dabcb7 100644
--- a/web/js/toolsCatalog.js
+++ b/web/js/toolsCatalog.js
@@ -37,6 +37,12 @@ const ToolsCatalog = [
         icon: "./images/uv-logo.png",
         view: "https://universalviewer.io/",
         description: "A viewer for web objects, allowing users to share their media with the world."
+    },
+    {
+        label: "Web Annotation Tool",
+        icon: "./images/rerum_logo.png",
+        view: "./web-annotation.html",
+        description: "A simple tool for creating and downloading Web Annotations in JSON-LD format."
     }
 ];
 
diff --git a/web/js/webAnnotationTool.js b/web/js/webAnnotationTool.js
new file mode 100644
index 00000000..58ec689c
--- /dev/null
+++ b/web/js/webAnnotationTool.js
@@ -0,0 +1,166 @@
+const RERUM_SANDBOX_CREATE = "https://tinydev.rerum.io/app/create";
+
+import { getStoredManifestLinks } from "./manifestStorage.js";
+// ---------- Helpers ----------
+
+// Check if URL is valid
+function isValidHttpUrl(url) {
+    try {
+        const u = new URL(url);
+        return u.protocol === "http:" || u.protocol === "https:";
+    } catch {
+        return false;
+    }
+}
+
+// ---------- Annotation Builder ----------
+
+function buildAnnotation(target, bodyText, motivation) {
+    const annotation = {
+        "@context": "http://www.w3.org/ns/anno.jsonld",
+        type: "Annotation",
+        motivation,
+        target
+    };
+
+    if (bodyText && bodyText.trim()) {
+        annotation.body = {
+            type: "TextualBody",
+            value: bodyText.trim(),
+            format: "text/plain"
+        };
+    }
+
+    return annotation;
+}
+
+async function saveAnnotationToRerum(annotation) {
+    const resp = await fetch(RERUM_SANDBOX_CREATE, {
+        method: "POST",
+        headers: {
+            "Content-Type": "application/json;charset=utf-8"
+        },
+        body: JSON.stringify(annotation)
+    });
+
+    if (!resp.ok) {
+        const text = await resp.text().catch(() => "");
+        throw new Error(`RERUM save failed: ${resp.status} ${resp.statusText} ${text}`);
+    }
+
+    const raw = await resp.json();  // full RERUM response (with new_obj_state etc.)
+
+    // This is the actual stored object. If new_obj_state exists, use that; otherwise fall back.
+    const stored = raw.new_obj_state || raw;
+
+    // Try to determine the URI in a robust way
+    const uri =
+        stored.id ||
+        stored['@id'] ||
+        raw['@id'] ||
+        resp.headers.get('location') ||
+        null;
+
+    // raw = full response, stored = “clean” object you want to show
+    return { raw, stored, uri };
+}
+
+// ---------- UI Logic ----------
+
+document.addEventListener("DOMContentLoaded", () => {
+    const generateBtn   = document.getElementById("generateBtn");
+    const output        = document.getElementById("annotationOutput");
+    const downloadBtn   = document.getElementById("downloadBtn");
+    const saveRerumBtn  = document.getElementById("saveRerumBtn");
+    const statusEl      = document.getElementById("rerumStatus");
+
+    let currentAnnotation = null;
+
+    // --- populate recent targets from manifests saved elsewhere ---
+    const recentTargetsList = document.getElementById("recentTargets");
+    if (recentTargetsList) {
+        const manifests = getStoredManifestLinks();
+        manifests.forEach(uri => {
+            const opt = document.createElement("option");
+            opt.value = uri;
+            recentTargetsList.appendChild(opt);
+        });
+    }
+
+    generateBtn.addEventListener("click", () => {
+        const target = document.getElementById("targetUrl").value.trim();
+        const body = document.getElementById("annotationBody").value.trim();
+        const motivation = document.getElementById("motivation").value;
+
+        if (!isValidHttpUrl(target)) {
+            alert("Please enter a valid http/https URL.");
+            return;
+        }
+
+        const annotation = buildAnnotation(target, body, motivation);
+        currentAnnotation = annotation;
+
+        output.textContent = JSON.stringify(annotation, null, 2);
+        downloadBtn.disabled  = false;
+        if (saveRerumBtn) {
+            saveRerumBtn.disabled = false;
+        }
+        if (statusEl) {
+            statusEl.textContent = "";
+        }
+    });
+
+    // --- Download Annotation ---
+    downloadBtn.addEventListener("click", () => {
+        if (!currentAnnotation) return;
+
+        const blob = new Blob(
+            [JSON.stringify(currentAnnotation, null, 2)],
+            { type: "application/json;charset=utf-8" }
+        );
+        const url = URL.createObjectURL(blob);
+        const a = document.createElement("a");
+        a.href = url;
+        a.download = "annotation.json";
+        document.body.appendChild(a);
+        a.click();
+        a.remove();
+        URL.revokeObjectURL(url);
+    });
+
+    // --- Save Annotation to RERUM sandbox ---
+    if (saveRerumBtn) {
+        saveRerumBtn.addEventListener("click", async () => {
+            if (!currentAnnotation) return;
+
+            saveRerumBtn.disabled = true;
+            if (statusEl) statusEl.textContent = "Saving to RERUM sandbox…";
+
+            try {
+                const { raw, stored, uri } = await saveAnnotationToRerum(currentAnnotation);
+
+                // Use the cleaned version for display and download
+                currentAnnotation = stored;
+                output.textContent = JSON.stringify(stored, null, 2);
+
+                if (statusEl) {
+                    if (uri) {
+                        statusEl.innerHTML = `Saved to RERUM: <a href="${uri}"
+                            target="_blank" rel="noopener noreferrer">${uri}</a>`;
+                    } else {
+                        statusEl.textContent = "Saved to RERUM (no URI returned).";
+                    }
+                }
+                // (optional) If you also want to treat annotation URIs as "recent links",
+                // you could call storeManifestLink(uri) here, or make a parallel storeAnnotationLink().
+            } catch (err) {
+                console.error(err);
+                if (statusEl) {
+                    statusEl.textContent = "Error saving to RERUM. See console for details.";
+                }
+            } finally {
+                saveRerumBtn.disabled = false;
+            }
+        });
+    }
+});
diff --git a/web/web-annotation.html b/web/web-annotation.html
new file mode 100644
index 00000000..c8f03541
--- /dev/null
+++ b/web/web-annotation.html
@@ -0,0 +1,87 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <title>Web Annotation Tool | Rerum Playground</title>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+    <!-- JS -->
+    <script src="./js/webAnnotationTool.js" type="module" defer></script>
+    <script src="./js/playground.js" type="module"></script>
+
+    <!-- CSS -->
+    <link rel="stylesheet" href="./css/playground.css">
+    <link rel="stylesheet" href="https://unpkg.com/chota@latest">
+
+    <style>
+        body{
+            padding-bottom: 90px;
+        }
+    </style>
+
+</head>
+
+<body>
+    <div id="menu-placeholder"></div>
+
+    <header>
+        <div class="header">
+            <div class="row">
+                <button onclick="openCloseMenu()" aria-label="Toggle Menu">
+                    &#9776;
+                </button>
+                <img src="logo.png" alt="Rerum Playground">
+            </div>
+        </div>
+    </header>
+
+    <div class="container">
+        <div class="placeholder" style="height: 50px;"></div>
+
+        <div id="content">
+            <h2>Web Annotation Generator</h2>
+            <p>Create simple W3C Web Annotations targeting any URI on the web.</p>
+
+            <form id="annotationForm" class="tool-form">
+
+               <label>Target URI *</label>
+               <input list="recentTargets" type="url" id="targetUrl"
+                    placeholder="https://example.org/page" required>
+                
+                <datalist id="recentTargets"></datalist>
+
+                <label>Annotation Body (optional)</label>
+                <textarea id="annotationBody" placeholder="Write annotation text..."></textarea>
+
+                <label>Motivation</label>
+                <select id="motivation">
+                    <option value="commenting">Commenting</option>
+                    <option value="tagging">Tagging</option>
+                    <option value="highlighting">Highlighting</option>
+                    <option value="linking">Linking</option>
+                    <option value="describing">Describing</option>
+                </select>
+
+                <button type="button" id="generateBtn" class="button primary">
+                    Generate Annotation
+                </button>
+            </form>
+
+            <h3>Generated Annotation</h3>
+            <pre id="annotationOutput" class="output-box"></pre>
+
+            <button id="downloadBtn" class="button" disabled>
+                Download JSON
+            </button>
+
+            <button id="saveRerumBtn" class="button secondary" disabled>
+                Save to RERUM (sandbox)
+            </button>
+
+            <p id="rerumStatus" class="status"></p>
+        </div>
+    </div>
+
+    <div id="footer-placeholder"></div>
+</body>
+</html>
\ No newline at end of file