diff --git a/src/main/w3c/annotation/annotationModel.type.ts b/src/main/w3c/annotation/annotationModel.type.ts
new file mode 100644
index 0000000000..f96a0a6dd2
--- /dev/null
+++ b/src/main/w3c/annotation/annotationModel.type.ts
@@ -0,0 +1,88 @@
+// ==LICENSE-BEGIN==
+// Copyright 2017 European Digital Reading Lab. All rights reserved.
+// Licensed to the Readium Foundation under one or more contributor license agreements.
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file exposed on Github (readium) in the project repository.
+// ==LICENSE-END==
+
+export interface IW3CAnnotationModel {
+    "@context": string;
+    id: string;
+    created: string;
+    modified: string;
+    type: string;
+    hash: string;
+    body: {
+        type: string;
+        value: string;
+        format: string;
+        color: string;
+        textDirection?: string;
+        language?: string;
+    };
+    target: {
+        source: string;
+        meta: {
+            headings: {
+                level: number;
+                txt: string;
+            }[];
+            page: string;
+        };
+        selector: (
+            | {
+                type: "TextQuoteSelector";
+                exact: string;
+                prefix: string;
+                suffix: string;
+            }
+            | {
+                type: "ProgressionSelector";
+                value: number;
+            }
+            | {
+                type: "DomRangeSelector";
+                startContainerElementCssSelector: string;
+                startContainerChildTextNodeIndex: number;
+                startOffset: number;
+                endContainerElementCssSelector: string;
+                endContainerChildTextNodeIndex: number;
+                endOffset: number;
+            }
+            | {
+                type: "FragmentSelector";
+                conformsTo: string;
+                value: string;
+            }
+        )[];
+    };
+}
+
+interface Generator {
+    id: string;
+    type: string;
+    name: string;
+    homepage: string;
+}
+
+interface About {
+    "dc:identifier": string[];
+    "dc:format": string;
+    "dc:title": string;
+    "dc:publisher": string;
+    "dc:creator": string;
+    "dc:date": string;
+    "dc:source"?: string;
+}
+
+export interface IW3CAnnotationModelSet {
+    "@context": string;
+    id: string;
+    type: string;
+    generator: Generator;
+    generated: string;
+    label: string;
+    about: About;
+    total: number,
+    items: IW3CAnnotationModel[];
+}
diff --git a/src/main/w3c/annotation/converter.ts b/src/main/w3c/annotation/converter.ts
new file mode 100644
index 0000000000..72d52ab006
--- /dev/null
+++ b/src/main/w3c/annotation/converter.ts
@@ -0,0 +1,113 @@
+// ==LICENSE-BEGIN==
+// Copyright 2017 European Digital Reading Lab. All rights reserved.
+// Licensed to the Readium Foundation under one or more contributor license agreements.
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file exposed on Github (readium) in the project repository.
+// ==LICENSE-END==
+
+import { IAnnotationState } from "readium-desktop/common/redux/states/annotation";
+import { IW3CAnnotationModel, IW3CAnnotationModelSet } from "./annotationModel.type";
+import { v4 as uuidv4 } from "uuid";
+import { _APP_VERSION } from "readium-desktop/preprocessor-directives";
+
+function rgbToHex(color: { red: number; green: number; blue: number }): string {
+    const { red, green, blue } = color;
+    const redHex = Math.min(255, Math.max(0, red)).toString(16).padStart(2, "0");
+    const greenHex = Math.min(255, Math.max(0, green)).toString(16).padStart(2, "0");
+    const blueHex = Math.min(255, Math.max(0, blue)).toString(16).padStart(2, "0");
+    return `#${redHex}${greenHex}${blueHex}`;
+}
+
+export function convertAnnotationToW3CAnnotationModel(annotation: IAnnotationState): IW3CAnnotationModel {
+
+    const currentDate = new Date();
+    const dateString: string = currentDate.toISOString();
+    const { uuid, hash, color, def } = annotation;
+    const { selectionInfo, locator, headings, epubPage } = def;
+    const { cleanText, rawText, rawBefore, rawAfter } = selectionInfo;
+    const { href } = locator;
+
+    return {
+        "@context": "http://www.w3.org/ns/anno.jsonld",
+        id: uuid ? "urn:uuid:" + uuid : "",
+        created: dateString,
+        modified: dateString,
+        type: "Annotation",
+        hash: hash || "",
+        body: {
+            type: "TextualBody",
+            value: cleanText || "",
+            format: "text/plain",
+            color: rgbToHex(color),
+            //   textDirection: "ltr",
+            //   language: "fr",
+        },
+        target: {
+            source: href || "",
+            meta: {
+                headings: (headings || []).map(({ txt, level }) => ({ level, txt })),
+                page: epubPage || "",
+            },
+            selector: [
+                {
+                    type: "TextQuoteSelector",
+                    exact: rawText || "",
+                    prefix: rawBefore || "",
+                    suffix: rawAfter || "",
+                },
+                {
+                    type: "ProgressionSelector",
+                    value: locator.locations?.progression || 0,
+                },
+                {
+                    type: "DomRangeSelector",
+                    startContainerElementCssSelector: selectionInfo?.rangeInfo?.startContainerElementCssSelector || "",
+                    startContainerChildTextNodeIndex: selectionInfo?.rangeInfo?.startContainerChildTextNodeIndex || 0,
+                    startOffset: selectionInfo?.rangeInfo?.startOffset || 0,
+                    endContainerElementCssSelector: selectionInfo?.rangeInfo?.endContainerElementCssSelector || "",
+                    endContainerChildTextNodeIndex: selectionInfo?.rangeInfo?.endContainerChildTextNodeIndex || 0,
+                    endOffset: selectionInfo?.rangeInfo?.endOffset || 0,
+                },
+                {
+                    type: "FragmentSelector",
+                    conformsTo: "http://www.idpf.org/epub/linking/cfi/epub-cfi.html",
+                    value: `epubcfi(${selectionInfo?.rangeInfo?.cfi || locator.locations?.cfi || ""})`,
+                },
+            ],
+        },
+    };
+}
+
+export function convertAnnotationListToW3CAnnotationModelSel(annotationArray: IAnnotationState[],
+    publicationMetadata: { identiferArrayString: string[], mimeType: string, title: string, publisher: string, creator: string, dateYear: string, sourceIsbn: string },
+): IW3CAnnotationModelSet {
+
+    const { identiferArrayString, mimeType, title, publisher, creator, dateYear, sourceIsbn } = publicationMetadata;
+    const currentDate = new Date();
+    const dateString: string = currentDate.toISOString();
+
+    return {
+        "@context": "http://www.w3.org/ns/anno.jsonld",
+        id: "urn:uuid:" + uuidv4(),
+        type: "AnnotationSet",
+        generator: {
+            id: "https://github.com/edrlab/thorium-reader/releases/tag/v" + _APP_VERSION,
+            type: "Software",
+            name: _APP_VERSION,
+            homepage: "https://thorium.edrlab.org",
+        },
+        generated: dateString,
+        label: "Annotations set",
+        about: {
+            "dc:identifier": identiferArrayString || [],
+            "dc:format": mimeType || "",
+            "dc:title": title || "",
+            "dc:publisher": publisher || "",
+            "dc:creator": creator || "",
+            "dc:date": dateYear || "",
+            "dc:source": sourceIsbn || "",
+        },
+        total: annotationArray.length,
+        items: (annotationArray || []).map((v) => convertAnnotationToW3CAnnotationModel(v)),
+    };
+}