Format pages: MP4 to MP3, Video to MP3, MP3 to WAV, WAV to MP3 (EN + ZH)

README.md

@@ -58,6 +58,7 @@ audiotools.dev/
 - `python3 scripts/seo_sync.py` rewrites the FAQPage JSON-LD on every page from the FAQ that is visible on that page, and refreshes `<lastmod>` in `sitemap.xml` from git. Run it after editing a FAQ or a page (needs `beautifulsoup4`).
 - CI (`.github/workflows/seo-check.yml`) runs `scripts/seo_sync.py --check` and fails if the markup and the visible FAQ drift apart.
 - `python3 scripts/build_zh.py` rebuilds the Chinese tool pages (volume booster, text to speech, joiner, compressor) from the English ones with the translation tables in the script, and keeps hreflang, the 中文/EN switch and the Chinese navigation in step. It stops if an English string it translates has changed, and runs `scripts/seo_sync.py` at the end.
+- `python3 scripts/build_landing.py` rebuilds the format pages (`/mp4-to-mp3/`, `/video-to-mp3/`, `/mp3-to-wav/`, `/wav-to-mp3/` and their `/zh/` versions) from the converter pages: same code, own copy and FAQ, output format preselected via `<body data-default-format>`. Run it after changing a converter page; it also refreshes the "Popular conversions" links on the converters and runs `seo_sync.py`.
 - Social preview images live in `og/` (1200×630, one per tool).
 
 ## Deployment

changelog/index.html

@@ -75,6 +75,7 @@ <h1>Changelog</h1>
         <section class="entry">
             <h2><time datetime="2026-10-22">October 22, 2026</time></h2>
             <ul>
+                <li>Pages for the most common conversions, in English and Chinese: <a href="/mp4-to-mp3/">MP4 to MP3</a>, <a href="/video-to-mp3/">Video to MP3</a>, <a href="/mp3-to-wav/">MP3 to WAV</a>, <a href="/wav-to-mp3/">WAV to MP3</a>. Each opens the converter with that format already chosen.</li>
                 <li>MP3 saving works again in older browsers (for example Safari before iOS 16.4), which the new engine had left out.</li>
                 <li>The <a href="/privacy/">privacy policy</a> now lists the anonymous tool events the site counts; what you type into the helper is never sent.</li>
                 <li>Chinese versions of Volume Booster, Text to Speech, Audio Joiner and Audio Compressor: <a href="/zh/volume-booster/">/zh/volume-booster/</a>, <a href="/zh/text-to-speech/">/zh/text-to-speech/</a>, <a href="/zh/audio-joiner/">/zh/audio-joiner/</a>, <a href="/zh/audio-compressor/">/zh/audio-compressor/</a>.</li>

converter/index.html

@@ -422,6 +422,13 @@ <h2>Supported Formats</h2>
             </p>
         </section>
 
+        <!-- CONVERSIONS (scripts/build_landing.py) -->
+        <section class="seo-content">
+            <h2>Popular conversions</h2>
+            <ul class="conversions"><li><a href="/mp4-to-mp3/">MP4 to MP3</a></li><li><a href="/video-to-mp3/">Video to MP3</a></li><li><a href="/mp3-to-wav/">MP3 to WAV</a></li><li><a href="/wav-to-mp3/">WAV to MP3</a></li></ul>
+        </section>
+        <!-- /CONVERSIONS -->
+
         <!-- FAQ -->
         <section class="faq">
             <h2>Frequently Asked Questions</h2>
@@ -498,7 +505,7 @@ <h2>Frequently Asked Questions</h2>
         let audioBuffer = null;   // decoded audio: for the waveform, and the fallback path
         let duration = 0;
         let audioCtx = null;
-        let selectedOutput = 'mp3';
+        let selectedOutput = document.body.dataset.defaultFormat || 'mp3';   // format pages preselect theirs
         let resultBlob = null;
         let resultFilename = '';
 

llms.txt

@@ -24,6 +24,7 @@
 
 - [About AudioTools.dev](https://audiotools.dev/about/): who builds it, how files stay on the device (and how to verify it in DevTools), what the site loads from the network, and how it is built.
 - [Changelog](https://audiotools.dev/changelog/): dated list of everything that has shipped since January 2026.
+- Format pages (the converter with the target format preselected): [MP4 to MP3](https://audiotools.dev/mp4-to-mp3/), [Video to MP3](https://audiotools.dev/video-to-mp3/) (MP4, MOV, MKV, WebM), [MP3 to WAV](https://audiotools.dev/mp3-to-wav/), [WAV to MP3](https://audiotools.dev/wav-to-mp3/). Chinese: /zh/mp4-to-mp3/, /zh/video-to-mp3/, /zh/mp3-to-wav/, /zh/wav-to-mp3/.
 - Chinese versions: [homepage](https://audiotools.dev/zh/), [audio converter](https://audiotools.dev/zh/converter/), [volume booster](https://audiotools.dev/zh/volume-booster/), [text to speech](https://audiotools.dev/zh/text-to-speech/), [audio joiner](https://audiotools.dev/zh/audio-joiner/), [audio compressor](https://audiotools.dev/zh/audio-compressor/).
 
 ## Key Facts

sitemap.xml

@@ -114,4 +114,53 @@
         <changefreq>monthly</changefreq>
         <priority>0.7</priority>
     </url>
+
+    <url>
+        <loc>https://audiotools.dev/mp4-to-mp3/</loc>
+        <lastmod>2026-10-22</lastmod>
+        <changefreq>monthly</changefreq>
+        <priority>0.8</priority>
+    </url>
+    <url>
+        <loc>https://audiotools.dev/video-to-mp3/</loc>
+        <lastmod>2026-10-22</lastmod>
+        <changefreq>monthly</changefreq>
+        <priority>0.8</priority>
+    </url>
+    <url>
+        <loc>https://audiotools.dev/mp3-to-wav/</loc>
+        <lastmod>2026-10-22</lastmod>
+        <changefreq>monthly</changefreq>
+        <priority>0.8</priority>
+    </url>
+    <url>
+        <loc>https://audiotools.dev/wav-to-mp3/</loc>
+        <lastmod>2026-10-22</lastmod>
+        <changefreq>monthly</changefreq>
+        <priority>0.8</priority>
+    </url>
+    <url>
+        <loc>https://audiotools.dev/zh/mp4-to-mp3/</loc>
+        <lastmod>2026-10-22</lastmod>
+        <changefreq>monthly</changefreq>
+        <priority>0.7</priority>
+    </url>
+    <url>
+        <loc>https://audiotools.dev/zh/video-to-mp3/</loc>
+        <lastmod>2026-10-22</lastmod>
+        <changefreq>monthly</changefreq>
+        <priority>0.7</priority>
+    </url>
+    <url>
+        <loc>https://audiotools.dev/zh/mp3-to-wav/</loc>
+        <lastmod>2026-10-22</lastmod>
+        <changefreq>monthly</changefreq>
+        <priority>0.7</priority>
+    </url>
+    <url>
+        <loc>https://audiotools.dev/zh/wav-to-mp3/</loc>
+        <lastmod>2026-10-22</lastmod>
+        <changefreq>monthly</changefreq>
+        <priority>0.7</priority>
+    </url>
 </urlset>

style.css

@@ -139,3 +139,11 @@ h1, h2 { font-stretch: 115%; letter-spacing: -0.015em; }
     .batch-status { grid-row: 1 / span 2; grid-column: 2; }
     .batch-status a { min-height: 44px; }
 }
+
+/* ---------- links to the format pages (MP4 to MP3, WAV to MP3, …) ---------- */
+.conversions { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 12px; padding: 0; }
+.seo-content .conversions { padding: 0; }   /* beats .seo-content ul */
+.seo-content .conversions li { margin: 0; }
+.conversions a { display: inline-flex; align-items: center; min-height: 36px; padding: 4px 14px; border: 1.5px solid var(--ink); border-radius: 999px; background: var(--surface); color: var(--ink); font-size: 14px; font-weight: 600; text-decoration: none; }
+.conversions a:hover { color: var(--accent2); border-color: var(--accent2); }
+@media (max-width: 600px) { .conversions a { min-height: 44px; } }