diff --git a/CHANGELOG.md b/CHANGELOG.md
index 26c7a229..6a0dee42 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -49,6 +49,10 @@ See [extension/CHANGELOG.md](extension/CHANGELOG.md).
 - Memory Map: a Modules column shows each object file's slice of every SDCC or cc65 segment (`Segment.modules`; SDCC from the `.rel` sizes in link order, with the remainder as `(libraries)`; cc65 from the ld65 map's module list, library members by name).
 - Memory Browser: a symbol label covers only its reported size, and an unsized symbol stops at its segment boundary instead of running into the next segment.
 
+### Website
+
+- Links that open the IDE now point at `https://8bitworkshop.com/latest/`, which the server proxies to the newest build: the badge in a published project's README, the README the VS Code extension writes for a new project, the platform links on the website, and the embedding docs. Old `redir.html` links still work.
+
 ### Asset editor
 
 - Undo/redo for edits, including binary files, and reliable undo for palette changes.
diff --git a/Makefile b/Makefile
index 8619ac37..042741c2 100644
--- a/Makefile
+++ b/Makefile
@@ -90,7 +90,6 @@ syncprod: distro
 	@[ "${VERSION}" ] || ( echo ">> No version set at HEAD, tag it first"; exit 1 )
 	echo Version: $(VERSION)
 	grep -H "var VERSION" web/redir.html
-	grep -H "var VERSION" web/projects/projects.js
 	read
 	cp config.js $(TMP)
 	#aws --profile pzp s3 sync --follow-symlinks $(TMP)/ s3://8bitworkshop.com/v$(VERSION)/
diff --git a/extension/src/terminalcli.ts b/extension/src/terminalcli.ts
index d29e550e..70439e58 100644
--- a/extension/src/terminalcli.ts
+++ b/extension/src/terminalcli.ts
@@ -4,6 +4,7 @@
 
 import * as fs from 'fs';
 import * as path from 'path';
+import { ideLink } from '../../src/common/links';
 
 export interface LauncherOptions {
   /** VS Code's executable; ELECTRON_RUN_AS_NODE makes it plain Node */
@@ -63,7 +64,7 @@ export function writeLauncher(binDir: string, opts: LauncherOptions, platform: s
 export function projectReadme(name: string, platform: { id: string, name: string, romext?: string }, mainFile: string): string {
   var base = path.basename(mainFile, path.extname(mainFile));
   var rom = base + (platform.romext || '.bin');
-  var link = `https://8bitworkshop.com/redir.html?platform=${encodeURIComponent(platform.id)}&file=${encodeURIComponent(mainFile)}`;
+  var link = ideLink({ platform: platform.id, file: mainFile });
   return `# ${name}
 
 A ${platform.name} program made with [8bitworkshop](${link}).
diff --git a/extension/test/terminalcli.test.ts b/extension/test/terminalcli.test.ts
index c275ef72..83b11fc0 100644
--- a/extension/test/terminalcli.test.ts
+++ b/extension/test/terminalcli.test.ts
@@ -44,4 +44,9 @@ describe('terminalcli', () => {
     assert.ok(readme.includes('8bws build game.c -o game.nes'));
     assert.ok(projectReadme('x', { id: 'c64', name: 'C64' }, 'a.c').includes('-o a.bin'));
   });
+
+  it('links to the IDE at /latest/', () => {
+    var readme = projectReadme('my-game', { id: 'nes', name: 'NES', romext: '.nes' }, 'game.c');
+    assert.ok(readme.includes('https://8bitworkshop.com/latest/?platform=nes&file=game.c'), readme);
+  });
 });
diff --git a/index.html b/index.html
index 28c1d229..908ec545 100644
--- a/index.html
+++ b/index.html
@@ -12,7 +12,7 @@
 <meta name="theme-color" content="#ffffff">
 <meta name="msapplication-navbutton-color" content="#ffffff">
 <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
-<meta name="msapplication-starturl" content="/redir.html">
+<meta name="msapplication-starturl" content="/latest/">
 <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=yes">
 <link rel="apple-touch-icon" href="/images/icon.png">
 <style type="text/css" media="screen">
@@ -125,7 +125,7 @@ body {
         </ul>
       </li>
       <!--
-      <hr><li><a class="dropdown-item" href="/redir.html">Use Latest Version</a></li>
+      <hr><li><a class="dropdown-item" href="/latest/">Use Latest Version</a></li>
       -->
     </ul>
   </span>
diff --git a/src/common/links.ts b/src/common/links.ts
new file mode 100644
index 00000000..6c224217
--- /dev/null
+++ b/src/common/links.ts
@@ -0,0 +1,31 @@
+/**
+ * Links into the web IDE.
+ *
+ * The IDE lives at /latest/, which the web server proxies to the newest
+ * build (see web/.htaccess), so these links always open the current IDE.
+ * The trailing slash matters: /latest without it is a 404.
+ */
+
+export const IDE_BASE_URL = 'https://8bitworkshop.com/latest/';
+
+/**
+ * A link that opens the web IDE, e.g.
+ * ideLink({platform: 'nes', file: 'game.c'}).
+ * Parameter values are URL-encoded, and undefined ones are left out.
+ */
+export function ideLink(params: { [key: string]: string | undefined | null }): string {
+  var query = Object.keys(params)
+    .filter(key => params[key] != null)
+    .map(key => encodeURIComponent(key) + '=' + encodeURIComponent(params[key] as string))
+    .join('&');
+  return query ? IDE_BASE_URL + '?' + query : IDE_BASE_URL;
+}
+
+/**
+ * The README.md a published project gets: a badge that opens the project in
+ * the IDE, naming the platform, the repository, and the main file.
+ */
+export function githubReadme(name: string, platform: string, githubURL: string, mainFile: string): string {
+  var link = ideLink({ platform: platform, githubURL: githubURL, file: mainFile });
+  return `${encodeURIComponent(name)}\n=====\n\n[Open this project in 8bitworkshop](${link}).\n`;
+}
diff --git a/src/docs/embedding-ide.md b/src/docs/embedding-ide.md
index 42bf4ade..2f689db8 100644
--- a/src/docs/embedding-ide.md
+++ b/src/docs/embedding-ide.md
@@ -3,7 +3,7 @@
 You can embed the IDE using an IFRAME element:
 
 ```html
-<iframe src="https://8bitworkshop.com/redir.html?embed=1&..."></iframe>
+<iframe src="https://8bitworkshop.com/latest/?embed=1&..."></iframe>
 ```
 
 Query-string parameters:
@@ -24,6 +24,6 @@ Example using Bootstrap's `embed-responsive` class:
 ```html
 <div class="embed-responsive embed-responsive-16by9">
   <iframe class="embed-responsive-item" loading="lazy"
-    src="https://8bitworkshop.com/redir.html?embed=1&platform=nes&highlight=&file0_name=testembed.dasm&file0_data=..."></iframe>
+    src="https://8bitworkshop.com/latest/?embed=1&platform=nes&highlight=&file0_name=testembed.dasm&file0_data=..."></iframe>
 </div>
 ```
diff --git a/src/ide/services.ts b/src/ide/services.ts
index 89412e3a..f897ceca 100644
--- a/src/ide/services.ts
+++ b/src/ide/services.ts
@@ -1,4 +1,5 @@
 
+import { githubReadme } from "../common/links";
 import { byteArrayToString, byteArrayToUTF8, isProbablyBinary, stringToByteArray } from "../common/util";
 import { FileData } from "../common/workertypes";
 import { CodeProject, ProjectFilesystem } from "./project";
@@ -30,8 +31,6 @@ export interface GHSession extends GHRepoMetadata {
   paths?: string[];
 }
 
-const README_md_template = "$NAME\n=====\n\n[Open this project in 8bitworkshop](https://8bitworkshop.com/redir.html?platform=$PLATFORM&githubURL=$GITHUBURL&file=$MAINFILE).\n";
-
 export function getRepos(): { [key: string]: GHRepoMetadata } {
   var repos = {};
   for (var i = 0; i < localStorage.length; i++) {
@@ -293,11 +292,7 @@ export class GithubService {
       .then((_repo) => {
         repo = _repo;
         // create README.md
-        var s = README_md_template;
-        s = s.replace(/\$NAME/g, encodeURIComponent(reponame));
-        s = s.replace(/\$PLATFORM/g, encodeURIComponent(platform_id));
-        s = s.replace(/\$GITHUBURL/g, encodeURIComponent(repo.htmlUrl));
-        s = s.replace(/\$MAINFILE/g, encodeURIComponent(mainPath));
+        var s = githubReadme(reponame, platform_id, repo.htmlUrl, mainPath);
         var config = {
           message: '8bitworkshop: updated metadata in README.md',
           content: btoa(s)
diff --git a/test/cli/testcli.js b/test/cli/testcli.js
index 005a0f72..e62813f7 100644
--- a/test/cli/testcli.js
+++ b/test/cli/testcli.js
@@ -107,6 +107,16 @@ describe('8bws CLI', function () {
             assert.strictEqual(r.data.platform, 'nes');
             assert.ok(r.data.source.endsWith(path.join('src', 'hello.c')), r.data.source);
         });
+        it('should read a README badge that links to /latest/', function () {
+            var dir = fs.mkdtempSync(path.join(os.tmpdir(), '8bws-dir-'));
+            fs.mkdirSync(path.join(dir, 'src'));
+            fs.copyFileSync('presets/nes/hello.c', path.join(dir, 'src', 'hello.c'));
+            fs.writeFileSync(path.join(dir, 'README.md'), '[x](https://8bitworkshop.com/latest/?platform=nes&githubURL=x&file=hello.c)\n');
+            var r = cliJSON('build', '--check', dir);
+            assert.ok(r.success, r.error);
+            assert.strictEqual(r.data.platform, 'nes');
+            assert.ok(r.data.source.endsWith(path.join('src', 'hello.c')), r.data.source);
+        });
     });
 
     describe('detect', function () {
diff --git a/test/unit/testdetect.ts b/test/unit/testdetect.ts
index 91401598..0c4efd96 100644
--- a/test/unit/testdetect.ts
+++ b/test/unit/testdetect.ts
@@ -25,6 +25,8 @@ describe('detect', () => {
   it('reads the README badge', async () => {
     var badge = parseReadmeBadge('Game\n\n[Open](http://8bitworkshop.com/redir.html?platform=vcs&githubURL=x&file=game.dasm).\n');
     assert.deepStrictEqual(badge, { platform: 'vcs', mainFile: 'game.dasm' });
+    var latest = parseReadmeBadge('Game\n\n[Open](https://8bitworkshop.com/latest/?platform=vcs&githubURL=x&file=game.dasm).\n');
+    assert.deepStrictEqual(latest, { platform: 'vcs', mainFile: 'game.dasm' });
     var d = await detectProject(files({ 'README.md': '[x](https://8bitworkshop.com/?platform=nes&file=main.c)', 'main.c': '' }));
     assert.strictEqual(d[0].platform, 'nes');
     assert.strictEqual(d[0].mainFile, 'main.c');
diff --git a/test/unit/testlinks.ts b/test/unit/testlinks.ts
new file mode 100644
index 00000000..93f10331
--- /dev/null
+++ b/test/unit/testlinks.ts
@@ -0,0 +1,28 @@
+import assert from "assert";
+import { describe, it } from "mocha";
+import { IDE_BASE_URL, githubReadme, ideLink } from "../../src/common/links";
+import { parseReadmeBadge } from "../../src/common/detect";
+
+describe('links', () => {
+  it('points at the IDE under /latest/', () => {
+    assert.strictEqual(IDE_BASE_URL, 'https://8bitworkshop.com/latest/');
+    // the trailing slash matters: /latest is a 404
+    assert.ok(IDE_BASE_URL.endsWith('/latest/'));
+  });
+
+  it('builds IDE links', () => {
+    assert.strictEqual(ideLink({ platform: 'nes', file: 'game.c' }),
+      'https://8bitworkshop.com/latest/?platform=nes&file=game.c');
+    assert.strictEqual(ideLink({ platform: 'nes', file: 'src/my game.c' }),
+      'https://8bitworkshop.com/latest/?platform=nes&file=src%2Fmy%20game.c');
+    assert.strictEqual(ideLink({ platform: 'nes', file: undefined }),
+      'https://8bitworkshop.com/latest/?platform=nes');
+    assert.strictEqual(ideLink({}), 'https://8bitworkshop.com/latest/');
+  });
+
+  it('writes a README badge the detector can read', () => {
+    var readme = githubReadme('my-game', 'nes', 'https://github.com/me/my-game', 'game.c');
+    assert.ok(readme.includes('https://8bitworkshop.com/latest/?platform=nes&githubURL=https%3A%2F%2Fgithub.com%2Fme%2Fmy-game&file=game.c'), readme);
+    assert.deepStrictEqual(parseReadmeBadge(readme), { platform: 'nes', mainFile: 'game.c' });
+  });
+});