diff --git a/web/src/core/adapters/s3Client/s3Client.ts b/web/src/core/adapters/s3Client/s3Client.ts
index 16ecec2f3..64617d95d 100644
--- a/web/src/core/adapters/s3Client/s3Client.ts
+++ b/web/src/core/adapters/s3Client/s3Client.ts
@@ -594,6 +594,23 @@ export function createS3Client(
             );
 
             return downloadUrl;
+        },
+
+        headObject: async ({ path }) => {
+            const { bucketName, objectName } = bucketNameAndObjectNameFromS3Path(path);
+
+            const { getAwsS3Client } = await prApi;
+
+            const { awsS3Client } = await getAwsS3Client();
+
+            const head = await awsS3Client.send(
+                new (await import("@aws-sdk/client-s3")).HeadObjectCommand({
+                    Bucket: bucketName,
+                    Key: objectName
+                })
+            );
+
+            return { contentType: head.ContentType, metadata: head.Metadata };
         }
 
         // "getPresignedUploadUrl": async ({ path, validityDurationSecond }) => {
diff --git a/web/src/core/ports/S3Client.ts b/web/src/core/ports/S3Client.ts
index 50eaef238..7b7c29570 100644
--- a/web/src/core/ports/S3Client.ts
+++ b/web/src/core/ports/S3Client.ts
@@ -59,6 +59,11 @@ export type S3Client = {
         validityDurationSecond: number;
     }) => Promise<string>;
 
+    headObject: (params: { path: string }) => Promise<{
+        contentType: string | undefined;
+        metadata: Record<string, string> | undefined;
+    }>;
+
     // getPresignedUploadUrl: (params: {
     //     path: string;
     //     validityDurationSecond: number;
diff --git a/web/src/core/usecases/dataExplorer/state.ts b/web/src/core/usecases/dataExplorer/state.ts
index 1875cad36..a03ba275f 100644
--- a/web/src/core/usecases/dataExplorer/state.ts
+++ b/web/src/core/usecases/dataExplorer/state.ts
@@ -25,6 +25,7 @@ export type State = {
               rows: any[];
               rowCount: number | undefined;
               fileDownloadUrl: string;
+              //   fileType: "parquet" | "csv" | "json";
           }
         | undefined;
 };
diff --git a/web/src/core/usecases/dataExplorer/thunks.ts b/web/src/core/usecases/dataExplorer/thunks.ts
index 2969d6b47..454bd147e 100644
--- a/web/src/core/usecases/dataExplorer/thunks.ts
+++ b/web/src/core/usecases/dataExplorer/thunks.ts
@@ -7,6 +7,46 @@ import { assert } from "tsafe/assert";
 import * as s3ConfigManagement from "core/usecases/s3ConfigManagement";
 
 const privateThunks = {
+    getFileDonwloadUrl:
+        (params: { sourceUrl: string }) =>
+        async (...args) => {
+            const [dispatch, , { oidc }] = args;
+
+            const { sourceUrl } = params;
+
+            const fileDownloadUrl = await (async () => {
+                if (sourceUrl.startsWith("https://")) {
+                    return sourceUrl;
+                }
+
+                const s3path = sourceUrl.replace(/^s3:\/\//, "/");
+                assert(s3path !== sourceUrl, "Unsupported protocol");
+
+                if (!oidc.isUserLoggedIn) {
+                    oidc.login({ doesCurrentHrefRequiresAuth: true });
+                    await new Promise(() => {});
+                }
+
+                const s3Client = (
+                    await dispatch(
+                        s3ConfigManagement.protectedThunks.getS3ConfigAndClientForExplorer()
+                    )
+                )?.s3Client;
+
+                if (s3Client === undefined) {
+                    alert("No S3 client available");
+                    await new Promise<never>(() => {});
+                    assert(false);
+                }
+
+                return s3Client.getFileDownloadUrl({
+                    path: s3path,
+                    validityDurationSecond: 3600 * 6
+                });
+            })();
+
+            return fileDownloadUrl;
+        },
     performQuery:
         (params: {
             queryParams: {
@@ -28,7 +68,7 @@ const privateThunks = {
 
             dispatch(actions.queryStarted({ queryParams }));
 
-            const { sqlOlap, oidc } = rootContext;
+            const { sqlOlap } = rootContext;
 
             const getIsActive = () => same(getState()[name].queryParams, queryParams);
 
@@ -49,36 +89,11 @@ const privateThunks = {
                     };
                 }
 
-                const fileDownloadUrl = await (async () => {
-                    if (sourceUrl.startsWith("https://")) {
-                        return sourceUrl;
-                    }
-
-                    const s3path = sourceUrl.replace(/^s3:\/\//, "/");
-                    assert(s3path !== sourceUrl, "Unsupported protocol");
-
-                    if (!oidc.isUserLoggedIn) {
-                        oidc.login({ doesCurrentHrefRequiresAuth: true });
-                        await new Promise(() => {});
-                    }
-
-                    const s3Client = (
-                        await dispatch(
-                            s3ConfigManagement.protectedThunks.getS3ConfigAndClientForExplorer()
-                        )
-                    )?.s3Client;
-
-                    if (s3Client === undefined) {
-                        alert("No S3 client available");
-                        await new Promise<never>(() => {});
-                        assert(false);
-                    }
-
-                    return s3Client.getFileDownloadUrl({
-                        path: s3path,
-                        validityDurationSecond: 3600 * 6
-                    });
-                })();
+                const fileDownloadUrl = await dispatch(
+                    privateThunks.getFileDonwloadUrl({
+                        sourceUrl
+                    })
+                );
 
                 const rowCountOrErrorMessage = await sqlOlap
                     .getRowCount(sourceUrl)
@@ -132,6 +147,49 @@ const privateThunks = {
                     fileDownloadUrl
                 })
             );
+        },
+    detectFileType:
+        (params: { sourceUrl: string }) =>
+        async (...args) => {
+            const { sourceUrl } = params;
+            const [dispatch] = args;
+
+            const extension = (() => {
+                const validExtensions = ["parquet", "csv", "json"] as const;
+                type ValidExtension = (typeof validExtensions)[number];
+
+                const isValidExtension = (ext: string): ext is ValidExtension =>
+                    validExtensions.includes(ext as ValidExtension);
+
+                let pathname: string;
+
+                try {
+                    pathname = new URL(sourceUrl).pathname;
+                } catch {
+                    return undefined;
+                }
+                const match = pathname.match(/\.(\w+)$/);
+
+                if (match === null) {
+                    return undefined;
+                }
+
+                const [, extension] = match;
+
+                return isValidExtension(extension) ? extension : undefined;
+            })();
+
+            if (extension) {
+                return extension;
+            }
+
+            const contentType = await (async () => {
+                const fileDownloadUrl = await dispatch(
+                    privateThunks.getFileDonwloadUrl({
+                        sourceUrl
+                    })
+                );
+            })();
         }
 } satisfies Thunks;
 
diff --git a/web/src/ui/i18n/resources/de.tsx b/web/src/ui/i18n/resources/de.tsx
index 60979628a..72ea9ee65 100644
--- a/web/src/ui/i18n/resources/de.tsx
+++ b/web/src/ui/i18n/resources/de.tsx
@@ -969,7 +969,8 @@ Fühlen Sie sich frei, Ihre Kubernetes-Bereitstellungen zu erkunden und die Kont
         "resize table": undefined
     },
     UrlInput: {
-        load: "Laden"
+        load: "Laden",
+        reset: "Leeren"
     },
     CommandBar: {
         ok: "Ok"
diff --git a/web/src/ui/i18n/resources/en.tsx b/web/src/ui/i18n/resources/en.tsx
index ab00c0a2f..2537739b1 100644
--- a/web/src/ui/i18n/resources/en.tsx
+++ b/web/src/ui/i18n/resources/en.tsx
@@ -299,7 +299,9 @@ export const translations: Translations<"en"> = {
                     our documentation
                 </MuiLink>
                 . &nbsp;
-                <MuiLink {...accountTabLink}>Configure the minio clients</MuiLink>.
+                <MuiLink {...accountTabLink}>
+                    Configure the minio clients
+                </MuiLink>.
             </>
         )
     },
@@ -345,7 +347,9 @@ export const translations: Translations<"en"> = {
                     our documentation
                 </MuiLink>
                 . &nbsp;
-                <MuiLink {...accountTabLink}>Configure your local Vault CLI</MuiLink>.
+                <MuiLink {...accountTabLink}>
+                    Configure your local Vault CLI
+                </MuiLink>.
             </>
         )
     },
@@ -950,7 +954,8 @@ Feel free to explore and take charge of your Kubernetes deployments!
         "resize table": "Resize"
     },
     UrlInput: {
-        load: "Load"
+        load: "Load",
+        reset: "Reset"
     },
     CommandBar: {
         ok: "Ok"
diff --git a/web/src/ui/i18n/resources/es.tsx b/web/src/ui/i18n/resources/es.tsx
index 2b912e6af..a284f60cf 100644
--- a/web/src/ui/i18n/resources/es.tsx
+++ b/web/src/ui/i18n/resources/es.tsx
@@ -311,7 +311,9 @@ export const translations: Translations<"en"> = {
                     nuestra documentación
                 </MuiLink>
                 . &nbsp;
-                <MuiLink {...accountTabLink}>Configura los clientes de minio</MuiLink>.
+                <MuiLink {...accountTabLink}>
+                    Configura los clientes de minio
+                </MuiLink>.
             </>
         )
     },
@@ -357,7 +359,9 @@ export const translations: Translations<"en"> = {
                     nuestra documentación
                 </MuiLink>
                 . &nbsp;
-                <MuiLink {...accountTabLink}>Configura tu Vault CLI local</MuiLink>.
+                <MuiLink {...accountTabLink}>
+                    Configura tu Vault CLI local
+                </MuiLink>.
             </>
         )
     },
@@ -955,7 +959,9 @@ export const translations: Translations<"en"> = {
                 específica del archivo copiando la URL de la barra de direcciones.
                 <br />
                 ¿No estás seguro por dónde empezar? ¡Prueba este{" "}
-                <MuiLink {...demoParquetFileLink}>archivo de demostración</MuiLink>!
+                <MuiLink {...demoParquetFileLink}>
+                    archivo de demostración
+                </MuiLink>!
             </>
         ),
         column: "columna",
@@ -964,7 +970,8 @@ export const translations: Translations<"en"> = {
         "resize table": "Redimensionar"
     },
     UrlInput: {
-        load: "Cargar"
+        load: "Cargar",
+        reset: "Vaciar"
     },
     CommandBar: {
         ok: "Aceptar"
diff --git a/web/src/ui/i18n/resources/fi.tsx b/web/src/ui/i18n/resources/fi.tsx
index 2e4bac931..daa182471 100644
--- a/web/src/ui/i18n/resources/fi.tsx
+++ b/web/src/ui/i18n/resources/fi.tsx
@@ -353,7 +353,9 @@ export const translations: Translations<"fi"> = {
                     dokumentaatiomme
                 </MuiLink>
                 . &nbsp;
-                <MuiLink {...accountTabLink}>Määritä paikallinen Vault CLI</MuiLink>.
+                <MuiLink {...accountTabLink}>
+                    Määritä paikallinen Vault CLI
+                </MuiLink>.
             </>
         )
     },
@@ -956,7 +958,8 @@ Tutustu vapaasti ja ota hallintaan Kubernetes-julkaisusi!
         "resize table": "Muuta taulukon kokoa"
     },
     UrlInput: {
-        load: "Lataa"
+        load: "Lataa",
+        reset: "Tyhjennä"
     },
     CommandBar: {
         ok: "ok"
diff --git a/web/src/ui/i18n/resources/fr.tsx b/web/src/ui/i18n/resources/fr.tsx
index 93ff72bee..56fa7e06a 100644
--- a/web/src/ui/i18n/resources/fr.tsx
+++ b/web/src/ui/i18n/resources/fr.tsx
@@ -313,7 +313,9 @@ export const translations: Translations<"fr"> = {
                     notre documentation
                 </MuiLink>
                 . &nbsp;
-                <MuiLink {...accountTabLink}>Configurer les clients MinIO</MuiLink>.
+                <MuiLink {...accountTabLink}>
+                    Configurer les clients MinIO
+                </MuiLink>.
             </>
         )
     },
@@ -359,7 +361,9 @@ export const translations: Translations<"fr"> = {
                     notre documentation
                 </MuiLink>
                 . &nbsp;
-                <MuiLink {...accountTabLink}>Configurer votre Vault CLI local</MuiLink>.
+                <MuiLink {...accountTabLink}>
+                    Configurer votre Vault CLI local
+                </MuiLink>.
             </>
         )
     },
@@ -965,7 +969,9 @@ N'hésitez pas à explorer et à prendre en main vos déploiements Kubernetes !
                 spécifique du fichier en copiant l'URL de la barre d'adresse.
                 <br />
                 Vous ne savez pas par où commencer ? Essayez ce{" "}
-                <MuiLink {...demoParquetFileLink}>fichier de démonstration</MuiLink> !
+                <MuiLink {...demoParquetFileLink}>
+                    fichier de démonstration
+                </MuiLink> !
             </>
         ),
         column: "colonne",
@@ -974,7 +980,8 @@ N'hésitez pas à explorer et à prendre en main vos déploiements Kubernetes !
         "resize table": "Redimensionner"
     },
     UrlInput: {
-        load: "Charger"
+        load: "Charger",
+        reset: "Vider"
     },
     CommandBar: {
         ok: "ok"
diff --git a/web/src/ui/i18n/resources/it.tsx b/web/src/ui/i18n/resources/it.tsx
index c187f5c7f..e951b0654 100644
--- a/web/src/ui/i18n/resources/it.tsx
+++ b/web/src/ui/i18n/resources/it.tsx
@@ -308,7 +308,9 @@ export const translations: Translations<"it"> = {
                     la nostra documentazione
                 </MuiLink>
                 . &nbsp;
-                <MuiLink {...accountTabLink}>Configurare i client MinIO</MuiLink>.
+                <MuiLink {...accountTabLink}>
+                    Configurare i client MinIO
+                </MuiLink>.
             </>
         )
     },
@@ -354,8 +356,9 @@ export const translations: Translations<"it"> = {
                     la nostra documentazione
                 </MuiLink>
                 . &nbsp;
-                <MuiLink {...accountTabLink}>Configurare il tuo Vault CLI locale</MuiLink>
-                .
+                <MuiLink {...accountTabLink}>
+                    Configurare il tuo Vault CLI locale
+                </MuiLink>.
             </>
         )
     },
@@ -965,7 +968,8 @@ Sentiti libero di esplorare e prendere il controllo dei tuoi deployment Kubernet
         "resize table": "Ridimensiona"
     },
     UrlInput: {
-        load: "Carica"
+        load: "Carica",
+        reset: "Svuotare"
     },
     CommandBar: {
         ok: "ok"
diff --git a/web/src/ui/i18n/resources/nl.tsx b/web/src/ui/i18n/resources/nl.tsx
index 23f8ae951..dc064ae75 100644
--- a/web/src/ui/i18n/resources/nl.tsx
+++ b/web/src/ui/i18n/resources/nl.tsx
@@ -356,7 +356,9 @@ export const translations: Translations<"nl"> = {
                     onze documentatie
                 </MuiLink>
                 . &nbsp;
-                <MuiLink {...accountTabLink}>Uw lokale Vault CLI instellen</MuiLink>.
+                <MuiLink {...accountTabLink}>
+                    Uw lokale Vault CLI instellen
+                </MuiLink>.
             </>
         )
     },
@@ -967,7 +969,8 @@ Voel je vrij om te verkennen en de controle over je Kubernetes-implementaties te
         "resize table": "Formaat wijzigen"
     },
     UrlInput: {
-        load: "Laden"
+        load: "Laden",
+        reset: "Leegmaken"
     },
     CommandBar: {
         ok: "ok"
diff --git a/web/src/ui/i18n/resources/no.tsx b/web/src/ui/i18n/resources/no.tsx
index 59b88d8fe..bd2fc53f7 100644
--- a/web/src/ui/i18n/resources/no.tsx
+++ b/web/src/ui/i18n/resources/no.tsx
@@ -961,7 +961,8 @@ Utforsk gjerne og ta kontroll over tjenestene du kjører på Kubernetes!
         "resize table": "Endre størrelse"
     },
     UrlInput: {
-        load: "Last"
+        load: "Last",
+        reset: "Tøm"
     },
     CommandBar: {
         ok: "ok"
diff --git a/web/src/ui/i18n/resources/zh-CN.tsx b/web/src/ui/i18n/resources/zh-CN.tsx
index 7a9c79024..2a62a6864 100644
--- a/web/src/ui/i18n/resources/zh-CN.tsx
+++ b/web/src/ui/i18n/resources/zh-CN.tsx
@@ -817,7 +817,9 @@ ${
         "share tooltip - belong to you, not shared": ({ projectName, focusColor }) => (
             <>
                 只有您可以访问此服务。点击共享给
-                <span style={{ color: focusColor }}>{projectName}</span>项目成员。
+                <span style={{ color: focusColor }}>
+                    {projectName}
+                </span>项目成员。
             </>
         )
     },
@@ -892,7 +894,9 @@ ${
                 URL，分享文件的永久链接，甚至是文件中某个特定行的链接。
                 <br />
                 不知道从哪里开始？尝试这个{" "}
-                <MuiLink {...demoParquetFileLink}>演示文件</MuiLink>！
+                <MuiLink {...demoParquetFileLink}>
+                    演示文件
+                </MuiLink>！
             </>
         ),
         column: "列",
@@ -901,7 +905,8 @@ ${
         "resize table": "调整大小"
     },
     UrlInput: {
-        load: "加载"
+        load: "加载",
+        reset: "清空"
     },
     CommandBar: {
         ok: "是"
diff --git a/web/src/ui/pages/dataExplorer/DataExplorer.tsx b/web/src/ui/pages/dataExplorer/DataExplorer.tsx
index 7c3d1ed77..b1e7b1e4e 100644
--- a/web/src/ui/pages/dataExplorer/DataExplorer.tsx
+++ b/web/src/ui/pages/dataExplorer/DataExplorer.tsx
@@ -5,7 +5,7 @@ import { routes } from "ui/routes";
 import { useCore, useCoreState } from "core";
 import { Alert } from "onyxia-ui/Alert";
 import { CircularProgress } from "onyxia-ui/CircularProgress";
-import { assert, type Equals } from "tsafe/assert";
+import { assert } from "tsafe/assert";
 import { UrlInput } from "./UrlInput";
 import { PageHeader } from "onyxia-ui/PageHeader";
 import { getIconUrlByName } from "lazy-icons";
@@ -198,7 +198,7 @@ export default function DataExplorer(props: Props) {
                                 disableColumnMenu
                                 loading={isQuerying}
                                 paginationMode="server"
-                                rowCount={rowCount ?? 999999999}
+                                rowCount={rowCount}
                                 pageSizeOptions={(() => {
                                     const pageSizeOptions = [25, 50, 100];
 
diff --git a/web/src/ui/pages/dataExplorer/UrlInput.tsx b/web/src/ui/pages/dataExplorer/UrlInput.tsx
index 67698c5f3..08e52b8f1 100644
--- a/web/src/ui/pages/dataExplorer/UrlInput.tsx
+++ b/web/src/ui/pages/dataExplorer/UrlInput.tsx
@@ -4,7 +4,7 @@ import { tss } from "tss";
 import { getIconUrlByName } from "lazy-icons";
 import { SearchBar } from "onyxia-ui/SearchBar";
 import { useEffectOnValueChange } from "powerhooks/useEffectOnValueChange";
-import { declareComponentKeys } from "ui/i18n";
+import { declareComponentKeys, useTranslation } from "ui/i18n";
 
 type Props = {
     className?: string;
@@ -16,6 +16,7 @@ type Props = {
 export function UrlInput(props: Props) {
     const { className, url, onUrlChange, getIsValidUrl } = props;
 
+    const { t } = useTranslation({ UrlInput });
     const [urlBeingTyped, setUrlBeingTyped] = useState(url);
 
     const isLoadable = urlBeingTyped !== url && getIsValidUrl(urlBeingTyped);
@@ -51,10 +52,14 @@ export function UrlInput(props: Props) {
             </div>
             <Button
                 className={classes.loadButton}
-                startIcon={getIconUrlByName("CloudDownload")}
+                startIcon={
+                    urlBeingTyped === ""
+                        ? getIconUrlByName("Clear")
+                        : getIconUrlByName("CloudDownload")
+                }
                 onClick={onButtonClick}
             >
-                Load
+                {urlBeingTyped === "" ? t("reset") : t("load")}
             </Button>
         </div>
     );
@@ -76,5 +81,5 @@ const useStyles = tss
         }
     }));
 
-const { i18n } = declareComponentKeys<"load">()({ UrlInput });
+const { i18n } = declareComponentKeys<"load" | "reset">()({ UrlInput });
 export type I18n = typeof i18n;
diff --git a/web/src/ui/pages/myFiles/MyFiles.tsx b/web/src/ui/pages/myFiles/MyFiles.tsx
index c20d6a38f..18b4a5c9f 100644
--- a/web/src/ui/pages/myFiles/MyFiles.tsx
+++ b/web/src/ui/pages/myFiles/MyFiles.tsx
@@ -141,6 +141,7 @@ function MyFiles(props: Props) {
     );
 
     const onOpenFile = useConstCallback<ExplorerProps["onOpenFile"]>(({ basename }) => {
+        //TODO use dataExplorer thunk
         if (basename.endsWith(".parquet") || basename.endsWith(".csv")) {
             const { path } = route.params;