diff --git a/public/templates/viewer.tmpl b/public/templates/viewer.tmpl
index 5f81eae..82a0a37 100644
--- a/public/templates/viewer.tmpl
+++ b/public/templates/viewer.tmpl
@@ -107,6 +107,7 @@
 
             for (tile_url in tile_urls) {
                 L.tileLayer(tile_urls[tile_url], {
+                    tileSize: 512,
                     minZoom: tile_minzoom,
                     maxZoom: tile_maxzoom,
                     attribution: tile_attribution
diff --git a/src/serve_data.js b/src/serve_data.js
index 4a95b1f..b282c86 100644
--- a/src/serve_data.js
+++ b/src/serve_data.js
@@ -169,6 +169,7 @@ export const serve_data = {
     );
 
     app.get('/:id.json', (req, res, next) => {
+      const tileSize = undefined;
       const item = repo[req.params.id];
       if (!item) {
         return res.sendStatus(404);
@@ -178,6 +179,7 @@ export const serve_data = {
         req,
         info.tiles,
         `data/${req.params.id}`,
+        tileSize,
         info.format,
         item.publicUrl,
         {
diff --git a/src/serve_rendered.js b/src/serve_rendered.js
index ec590b6..0e1260b 100644
--- a/src/serve_rendered.js
+++ b/src/serve_rendered.js
@@ -552,6 +552,7 @@ export const serve_rendered = {
         const y = req.params.y | 0;
         const scale = getScale(req.params.scale);
         const format = req.params.format;
+        const tileSize = 256;
         if (
           z < 0 ||
           x < 0 ||
@@ -562,11 +563,58 @@ export const serve_rendered = {
         ) {
           return res.status(404).send('Out of bounds');
         }
-        const tileSize = 256;
         const tileCenter = mercator.ll(
           [
-            ((x + 0.5) / (1 << z)) * (256 << z),
-            ((y + 0.5) / (1 << z)) * (256 << z),
+            ((x + 0.5) / (1 << z)) * (tileSize << z),
+            ((y + 0.5) / (1 << z)) * (tileSize << z),
+          ],
+          z,
+        );
+
+        // prettier-ignore
+        return respondImage(
+          options, item, z, tileCenter[0], tileCenter[1], 0, 0, tileSize, tileSize, scale, format, res,
+        );
+      },
+    );
+
+    app.get(
+      `/:id/:tileSize(256|512)/:z(\\d+)/:x(\\d+)/:y(\\d+):scale(${scalePattern})?.:format([\\w]+)`,
+      (req, res, next) => {
+        const item = repo[req.params.id];
+        if (!item) {
+          return res.sendStatus(404);
+        }
+
+        const modifiedSince = req.get('if-modified-since');
+        const cc = req.get('cache-control');
+        if (modifiedSince && (!cc || cc.indexOf('no-cache') === -1)) {
+          if (new Date(item.lastModified) <= new Date(modifiedSince)) {
+            return res.sendStatus(304);
+          }
+        }
+
+        const z = req.params.z | 0;
+        const x = req.params.x | 0;
+        const y = req.params.y | 0;
+        const scale = getScale(req.params.scale);
+        const format = req.params.format;
+        const tileSize = parseInt(req.params.tileSize, 10) || 256;
+        console.log(tileSize);
+        if (
+          z < 0 ||
+          x < 0 ||
+          y < 0 ||
+          z > 22 ||
+          x >= Math.pow(2, z) ||
+          y >= Math.pow(2, z)
+        ) {
+          return res.status(404).send('Out of bounds');
+        }
+        const tileCenter = mercator.ll(
+          [
+            ((x + 0.5) / (1 << z)) * (tileSize << z),
+            ((y + 0.5) / (1 << z)) * (tileSize << z),
           ],
           z,
         );
@@ -822,6 +870,7 @@ export const serve_rendered = {
     }
 
     app.get('/:id.json', (req, res, next) => {
+      const tileSize = 512;
       const item = repo[req.params.id];
       if (!item) {
         return res.sendStatus(404);
@@ -831,6 +880,7 @@ export const serve_rendered = {
         req,
         info.tiles,
         `styles/${req.params.id}`,
+        tileSize,
         info.format,
         item.publicUrl,
       );
diff --git a/src/server.js b/src/server.js
index 2b382a0..465b0e5 100644
--- a/src/server.js
+++ b/src/server.js
@@ -356,6 +356,7 @@ function start(opts) {
 
   const addTileJSONs = (arr, req, type) => {
     for (const id of Object.keys(serving[type])) {
+      const tileSize = 256;
       const info = clone(serving[type][id].tileJSON);
       let path = '';
       if (type === 'rendered') {
@@ -367,6 +368,7 @@ function start(opts) {
         req,
         info.tiles,
         path,
+        tileSize,
         info.format,
         opts.publicUrl,
         {
@@ -452,6 +454,7 @@ function start(opts) {
       };
 
       if (style.serving_rendered) {
+        const tileSize = 256;
         const { center } = style.serving_rendered.tileJSON;
         if (center) {
           style.viewer_hash = `#${center[2]}/${center[1].toFixed(
@@ -468,6 +471,7 @@ function start(opts) {
           req,
           style.serving_rendered.tileJSON.tiles,
           `styles/${id}`,
+          tileSize,
           style.serving_rendered.tileJSON.format,
           opts.publicUrl,
         )[0];
@@ -491,17 +495,19 @@ function start(opts) {
 
       data.is_vector = tileJSON.format === 'pbf';
       if (!data.is_vector) {
+        const tileSize = 256;
         if (center) {
           const centerPx = mercator.px([center[0], center[1]], center[2]);
           data.thumbnail = `${center[2]}/${Math.floor(
             centerPx[0] / 256,
-          )}/${Math.floor(centerPx[1] / 256)}.${tileJSON.format}`;
+          )}/${Math.floor(centerPx[1] / tileSize)}.${tileJSON.format}`;
         }
 
         data.xyz_link = getTileUrls(
           req,
           tileJSON.tiles,
           `data/${id}`,
+          tileSize,
           tileJSON.format,
           opts.publicUrl,
           {
diff --git a/src/utils.js b/src/utils.js
index 4fdf43a..c3b23b4 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -26,7 +26,7 @@ export const getPublicUrl = (publicUrl, req) => {
   return getUrlObject(req).toString();
 };
 
-export const getTileUrls = (req, domains, path, format, publicUrl, aliases) => {
+export const getTileUrls = (req, domains, path, tileSize, format, publicUrl, aliases) => {
   const urlObject = getUrlObject(req);
   if (domains) {
     if (domains.constructor === String && domains.length > 0) {
@@ -67,15 +67,20 @@ export const getTileUrls = (req, domains, path, format, publicUrl, aliases) => {
     format = aliases[format];
   }
 
+  let tileParams = '{z}/{x}/{y}';
+  if (['png', 'jpg', 'jpeg', 'webp'].includes(format) && tileSize) {
+    tileParams = `${tileSize}/{z}/{x}/{y}`;
+  }
+
   const uris = [];
   if (!publicUrl) {
     for (const domain of domains) {
       uris.push(
-        `${req.protocol}://${domain}/${path}/{z}/{x}/{y}.${format}${query}`,
+        `${req.protocol}://${domain}/${path}/${tileParams}.${format}${query}`,
       );
     }
   } else {
-    uris.push(`${publicUrl}${path}/{z}/{x}/{y}.${format}${query}`);
+    uris.push(`${publicUrl}${path}/${tileParams}.${format}${query}`);
   }
 
   return uris;