# SMDownloader — AI系统完整文档（中文）

## Overview

**Name:** SMDownloader
**Domain:** www.smdownloader.com
**URL:** https://www.smdownloader.com/zh
**Language:** zh
**Also available:** English at https://www.smdownloader.com/ (see https://www.smdownloader.com/llms-full.txt); Spanish at https://www.smdownloader.com/es (see https://www.smdownloader.com/es/llms-full.txt); French at https://www.smdownloader.com/fr (see https://www.smdownloader.com/fr/llms-full.txt)
**Category:** Social Media Downloader / Multimedia Web Application
**Tagline:** Social Media Downloader

SMDownloader是一款网页应用，用户可以通过粘贴URL从公开社交媒体帖子中保存视频、图片、Reels、短片和故事。处理是临时性的且由用户发起：服务不托管、存储、归档、发布或再分发第三方媒体。产品、平台、工具和指南页面在`/zh/...`（原生拼音路径段）下提供中文版本；法律政策保持英文。

## Languages and locales

| Locale | Home | Inventory | Full docs | Path style |
|--------|------|-----------|-----------|------------|
| en (default) | https://www.smdownloader.com/ | https://www.smdownloader.com/llms.txt | https://www.smdownloader.com/llms-full.txt | Unprefixed English segments (`/platforms`, `/faq`) |
| es | https://www.smdownloader.com/es | https://www.smdownloader.com/es/llms.txt | https://www.smdownloader.com/es/llms-full.txt | Prefixed native Spanish segments (`/es/plataformas`, `/es/preguntas-frecuentes`) |
| fr | https://www.smdownloader.com/fr | https://www.smdownloader.com/fr/llms.txt | https://www.smdownloader.com/fr/llms-full.txt | Prefixed native French segments (`/fr/plateformes`, `/fr/questions-frequentes`) |
| zh | https://www.smdownloader.com/zh | https://www.smdownloader.com/zh/llms.txt | https://www.smdownloader.com/zh/llms-full.txt | Prefixed Chinese拼音 segments (`/zh/ping-tai`, `/zh/chang-wen`) |

- XML sitemap `https://www.smdownloader.com/sitemap.xml` lists **every shipped locale** as `<loc>` entries and attaches `xhtml:link` hreflang alternates (`en`, `es`, `fr`, `zh`, `x-default`) on paired pages.
- Legal/policy pages (`/terms`, `/privacy`, `/copyright`, `/acceptable-use`, `/platform-disclaimer`) are **English-only** — no `/es/...`, `/fr/...`, or `/zh/...` legal mirrors.

## Core product statement

SMDownloader does not host, store, archive, publish, or redistribute third-party media. The service performs temporary, user-directed processing only for the purpose of responding to the user's request.

## Primary user flow

1. User visits https://www.smdownloader.com/zh
2. User copies a URL from a public social media post, reel, clip, or story
3. User pastes the URL into the main download input field
4. On the first download attempt in a browser, user confirms they have rights to save the content (consent modal; stored in localStorage as `smdl_consent_v1`)
5. User clicks Download
6. System detects the platform, fetches media metadata via `/api/extract`, and provides save links (optionally streamed via `/api/proxy`)
7. User saves the file to their device
8. No permanent copy of the media is retained on SMDownloader servers

## Supported platforms

| Platform   | Status   | Content Types                    |
|------------|----------|----------------------------------|
| Instagram  | Supported | Reels, Posts, Stories, IGTV, Carousels, Audio |
| Facebook   | Supported | Videos, Reels, Photos, GIFs  |
| TikTok     | Supported | Videos, Photo posts, Stories, MP3 |
| Threads    | Supported | Posts, Videos                |
| Bluesky    | Supported | Posts, Videos, Images        |
| YouTube    | Beta      | Shorts, Clips                |
| X/Twitter  | Supported | Videos, Images, GIFs         |
| Douyin     | Supported | Videos, Audio, Images, Notes |
| SoundCloud | Supported | Tracks, Playlists, Audio     |

## Platform downloaders (overview pages)

| Path                    | Hub title               | Description                                                                                                                                                                |
|-------------------------|-------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| /zh/ping-tai/tiktok     | TikTok Downloaders      | Free TikTok downloaders for videos, MP3 audio, stories, and photo slideshows. Paste a public share link — /api/extract on our servers, preview, save. No login.            |
| /zh/ping-tai/bluesky    | Bluesky Downloaders     | Free Bluesky downloaders for video, images, GIFs, and threads. Paste a public bsky.app post URL — our servers use /api/extract; preview and save. No login.                |
| /zh/ping-tai/douyin     | Douyin Downloaders      | Free Douyin downloaders for video, MP3, and image notes. Paste public douyin.com links — /api/extract on our servers, preview on SMDownloader, save. No login.             |
| /zh/ping-tai/soundcloud | SoundCloud Downloaders  | Free SoundCloud downloaders for tracks and playlists. Paste public soundcloud.com or on.soundcloud.com links — /api/extract on our servers, preview audio, save. No login. |
| /zh/ping-tai/instagram  | Instagram Downloaders   | Free Instagram downloaders for reels, videos, stories, photos, carousels, and audio. Paste instagram.com links — /api/extract on our servers, preview, save. No login.     |
| /zh/ping-tai/facebook   | Facebook Downloaders    | Free Facebook downloaders for watch videos and reels. Paste facebook.com or fb.watch links — /api/extract on our servers, preview, save. Story URL guide.                  |
| /zh/ping-tai/x-twitter  | X / Twitter Downloaders | Free X / Twitter downloaders for videos, images, and GIFs. Paste a public x.com or twitter.com status URL — preview via /api/extract and save. No login.                   |
| /zh/ping-tai/youtube    | YouTube Downloaders     | Free YouTube downloaders (Beta) for Shorts video and audio. Paste a public youtube.com link — /api/extract on our servers, preview, save. No login.                        |
| /zh/ping-tai/threads    | Threads Downloaders     | Free Threads downloaders for videos and images. Paste a public threads.com or threads.net post URL — preview via /api/extract and save. No login.                          |

## Downloaders (leaf pages)

| Path                                                   | Format            | SEO title                                       | Description                                                                                                                                                            |
|--------------------------------------------------------|-------------------|-------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| /zh/ping-tai/tiktok/tiktok-video-downloader            | Video             | TikTok Video Downloader — Save Videos & Reels   | Free TikTok video downloader — download TikTok video from tiktok.com or vm.tiktok.com links. Paste, preview MP4 via our servers, then save — no login.                 |
| /zh/ping-tai/tiktok/tiktok-mp3-downloader              | MP3               | TikTok MP3 Downloader                           | Free TikTok MP3 downloader for public video links. Paste tiktok.com or vm.tiktok.com in SMDownloader, preview audio via our servers, then save — no login.             |
| /zh/ping-tai/tiktok/tiktok-story-downloader            | Story             | TikTok Story Downloader — Save Before Expiry    | Free TikTok story downloader for public share links. Paste tiktok.com or vm.tiktok.com while live, preview video or image via our servers, save fast — no login.       |
| /zh/ping-tai/tiktok/tiktok-slideshow-photo-downloader  | Slideshow & Photo | TikTok Slideshow & Photo Downloader             | TikTok slideshow downloader for public photo carousels. Paste tiktok.com/@user/photo/ URLs in SMDownloader, preview images via our servers, save — no login.           |
| /zh/ping-tai/bluesky/bluesky-video-downloader          | Video             | Bluesky Video Downloader                        | Bluesky video downloader — save bluesky video from public bsky.app post URLs. Paste, preview MP4 via /api/extract on our servers, then save — free, no login.          |
| /zh/ping-tai/bluesky/bluesky-image-downloader          | Image             | Bluesky Image Downloader                        | Bluesky image downloader — download photos and carousels from public bsky.app post links. Preview full CDN images via /api/extract, save each file — no login.         |
| /zh/ping-tai/bluesky/bluesky-gif-downloader            | Gif               | Bluesky GIF Downloader                          | Bluesky GIF downloader — save animated GIFs from public bsky.app post URLs. Paste the post link, preview via /api/extract on our servers, then save — free.            |
| /zh/ping-tai/bluesky/bluesky-thread-downloader         | Thread            | Bluesky Thread Downloader                       | Paste the root post URL of a Bluesky thread. Download all images and videos as individual files.                                                                       |
| /zh/ping-tai/douyin/douyin-video-downloader            | Video             | Douyin Video Downloader                         | Douyin video downloader — paste douyin.com/video or v.douyin.com share links, preview MP4 via /api/extract on our servers, then save — free, no login.                 |
| /zh/ping-tai/douyin/douyin-mp3-downloader              | MP3               | Douyin to MP3 Downloader — Save MP3             | Douyin to mp3 downloader — paste douyin.com or v.douyin.com video links, preview audio via /api/extract on our servers, then save — free, no app or login.             |
| /zh/ping-tai/douyin/douyin-image-downloader            | Image             | Douyin Image Downloader                         | Douyin image downloader — paste public douyin.com/note or carousel links, preview each photo via /api/extract on our servers, then save — free, no login.              |
| /zh/ping-tai/soundcloud/soundcloud-track-downloader    | Track             | SoundCloud Track Downloader                     | SoundCloud track downloader — paste public soundcloud.com or on.soundcloud.com URLs, preview audio via our servers, then save — free, no login.                        |
| /zh/ping-tai/soundcloud/soundcloud-playlist-downloader | Playlist          | SoundCloud Playlist Downloader                  | SoundCloud playlist downloader — paste public /sets/ playlist URLs, preview each track via /api/extract on our servers, save tracks individually — free, no login.     |
| /zh/ping-tai/instagram/instagram-video-downloader      | Video             | Instagram Video Downloader — Reels & Posts      | Free instagram video downloader — download instagram video from reel, /p/, or IGTV links. Paste public URLs, preview via /api/extract on our servers, save — no login. |
| /zh/ping-tai/instagram/instagram-reels-downloader      | Reels             | Instagram Reels Downloader — Save Reel Videos   | Free instagram reels downloader — download instagram reel MP4s. Paste instagram.com/reel/, preview, save instagram reel — reels video downloader, no login.            |
| /zh/ping-tai/instagram/instagram-audio-downloader      | Audio             | Instagram Audio Downloader — Reels & Music      | Free instagram audio downloader for instagram reel audio download. Instagram music downloader for reels — paste /reel/ or /p/, preview M4A or MP4 — no login.          |
| /zh/ping-tai/instagram/instagram-story-downloader      | Story             | Instagram Story Downloader — Save Stories       | Free instagram story downloader. Paste instagram.com/stories/ to download instagram story video, save instagram story files before 24 hours — no login.                |
| /zh/ping-tai/instagram/instagram-photo-downloader      | Photo             | Instagram Photo Downloader — Save Pictures      | Free instagram photo downloader — download instagram photo from /p/ URLs. Save instagram picture — image downloader, paste link, preview via /api/extract, no login.   |
| /zh/ping-tai/instagram/instagram-carousel-downloader   | Carousel          | Instagram Carousel Downloader — Save Slides     | Free instagram carousel downloader — download instagram carousel from one /p/ URL. Save instagram multiple photos — instagram album downloader, no login.              |
| /zh/ping-tai/facebook/facebook-video-downloader        | Video             | Facebook Video Downloader — Save Watch Videos   | Free facebook video downloader — download facebook video from fb.watch or facebook.com/watch. Paste link, preview MP4, save facebook watch video — no login.           |
| /zh/ping-tai/facebook/facebook-reels-downloader        | Reels             | Facebook Reels Downloader — Save Reel Videos    | Free facebook reels downloader — download facebook reel MP4s. Paste public facebook.com/reel/ links, preview, save facebook reel — fb reel download, no login.         |
| /zh/ping-tai/facebook/facebook-story-downloader        | Story             | Facebook Story Downloader — Save Live           | Facebook story downloader guide — copy Share links while stories are live, learn which URL shapes work, save before 24 hours. Honest /stories/ limits.                 |
| /zh/ping-tai/x-twitter/x-twitter-video-downloader      | Video             | Twitter Video Downloader – Save X Videos as MP4 | Free twitter video downloader for x.com and twitter.com posts. Paste a link to save X videos as MP4 in HD — no login, no app; iPhone, Android, desktop.                |
| /zh/ping-tai/youtube/youtube-shorts-downloader         | Shorts            | YouTube Shorts Downloader – Save Shorts as MP4  | Free YouTube Shorts downloader (Beta). Paste a public youtube.com/shorts/ link to save the clip as MP4 — no login, no app; iPhone, Android, desktop.                   |
| /zh/ping-tai/youtube/youtube-shorts-audio-downloader   | Shorts Audio      | YouTube Shorts to MP3 Downloader (Beta)         | Free YouTube Shorts to MP3 tool (Beta). Paste a public youtube.com/shorts/ link, preview the audio-bearing file via our servers, save — no login, no app.              |
| /zh/ping-tai/threads/threads-video-downloader          | Video             | Threads Video Downloader – Save Posts as MP4    | Free threads video downloader for public threads.com and threads.net posts. Paste a link to save the clip as MP4 — no login; iPhone, Android, desktop.                 |

## Platforms without downloader hubs

| Path | Description |
|------|-------------|

## Supported content types

- Videos (MP4, WebM where available)
- Audio (MP3, M4A where available — Instagram Reels, SoundCloud tracks, Douyin audio)
- Images (JPEG, PNG, WebP)
- Reels and short-form clips
- Stories (where publicly accessible)
- GIFs and animated content

## User responsibilities

- Must own submitted content or have permission from the rights holder
- Solely responsible for every URL submitted and how downloaded files are used
- Public availability does not equal legal permission to download
- Must not infringe copyright, violate privacy, bypass access controls, or abuse the service
- Must comply with each platform's own terms of service

## Authentication

- Not required
- No user accounts, profiles, or login in the current version

## Data handling (privacy summary)

- No first-party database of submitted URLs, IP addresses, or user-agent strings for routine downloads
- Extract API processes URLs in memory; no permanent media storage
- Proxy endpoint streams media transiently; no public media cache or recent-downloads list
- Sentry (if configured): extract failure diagnostics only; sanitized host + path type, not full URL; `sendDefaultPii: false`
- Google Analytics (when enabled): aggregate page/traffic metrics only; download URLs not sent to GA
- Browser localStorage: download consent record (acceptance, timestamp, terms version)

## First-download consent

- Modal appears before the first valid download in a browser
- Required checkbox: user confirms rights to save content and agrees to responsible use
- Links to Terms and Copyright policies (open in new tab)
- After acceptance, stored in `localStorage` key `smdl_consent_v1`; skipped on subsequent downloads until terms version changes
- Persistent disclaimer under download input: "Use only for content you own or have permission to save. SMDownloader does not host or store media."

## Legal framework

SMDownloader uses a **Terms of Service** for its web application — not an EULA. There is no software to install, no browser helper extension, and no separate license agreement. Users accept terms by using the website and through the first-download consent flow.

## Legal pages

| Page               | URL                                              |
|--------------------|--------------------------------------------------|
| Terms of Service   | https://www.smdownloader.com/terms               |
| Privacy Policy     | https://www.smdownloader.com/privacy             |
| Copyright / DMCA   | https://www.smdownloader.com/copyright           |
| Acceptable Use     | https://www.smdownloader.com/acceptable-use      |
| Platform Disclaimer| https://www.smdownloader.com/platform-disclaimer |
| Contact / Abuse    | https://www.smdownloader.com/zh/lian-luo |
| FAQ                | https://www.smdownloader.com/zh/chang-wen |

## Contact addresses

- copyright@www.smdownloader.com — copyright and DMCA notices
- abuse@www.smdownloader.com — abuse and policy violations
- support@www.smdownloader.com — general support and privacy questions

## Site pages

| Path                                                                  | Description                               |
|-----------------------------------------------------------------------|-------------------------------------------|
| /zh                                                                   | Home — download input (hero)              |
| /zh/how-to-works                                                      | Three-step usage guide                    |
| /zh/ping-tai                                                          | Supported platforms overview              |
| /zh/gong-neng                                                         | Product features                          |
| /zh/guan-yu                                                           | About SMDownloader                        |
| /zh/ping-tai/instagram                                                | Instagram downloader details              |
| /zh/ping-tai/facebook                                                 | Facebook downloader details               |
| /zh/ping-tai/tiktok                                                   | TikTok downloader details                 |
| /zh/ping-tai/threads                                                  | Threads downloader details                |
| /zh/ping-tai/bluesky                                                  | Bluesky downloader details                |
| /zh/ping-tai/youtube                                                  | YouTube downloader details (Beta)         |
| /zh/ping-tai/x-twitter                                                | X / Twitter downloader details            |
| /zh/ping-tai/douyin                                                   | Douyin downloader details                 |
| /zh/ping-tai/soundcloud                                               | SoundCloud downloader details             |
| /zh/ping-tai/tiktok/tiktok-video-downloader                           | TikTok 视频下载器 — 保存视频与 Reels                |
| /zh/ping-tai/tiktok/tiktok-mp3-downloader                             | TikTok MP3 下载器                            |
| /zh/ping-tai/tiktok/tiktok-story-downloader                           | TikTok 故事下载器 — 在过期前保存                     |
| /zh/ping-tai/tiktok/tiktok-slideshow-photo-downloader                 | TikTok 演示与照片下载器                           |
| /zh/ping-tai/bluesky/bluesky-video-downloader                         | Bluesky 视频下载器                             |
| /zh/ping-tai/bluesky/bluesky-image-downloader                         | Bluesky 图片下载器                             |
| /zh/ping-tai/bluesky/bluesky-gif-downloader                           | Bluesky GIF 下载器                           |
| /zh/ping-tai/bluesky/bluesky-thread-downloader                        | Bluesky 串文下载器                             |
| /zh/ping-tai/douyin/douyin-video-downloader                           | Douyin 视频下载器                              |
| /zh/ping-tai/douyin/douyin-mp3-downloader                             | Douyin 转 MP3 下载器 — 保存 MP3                 |
| /zh/ping-tai/douyin/douyin-image-downloader                           | Douyin 图片下载器                              |
| /zh/ping-tai/soundcloud/soundcloud-track-downloader                   | SoundCloud 曲目下载器                          |
| /zh/ping-tai/soundcloud/soundcloud-playlist-downloader                | SoundCloud 播放列表下载器                        |
| /zh/ping-tai/instagram/instagram-video-downloader                     | Instagram 视频下载器 — Reels 与帖子               |
| /zh/ping-tai/instagram/instagram-reels-downloader                     | Instagram Reels 下载器 — 保存 Reel 视频          |
| /zh/ping-tai/instagram/instagram-audio-downloader                     | Instagram 音频下载器 — Reels 与音乐               |
| /zh/ping-tai/instagram/instagram-story-downloader                     | Instagram 故事下载器 — 保存故事                    |
| /zh/ping-tai/instagram/instagram-photo-downloader                     | Instagram 照片下载器 — 保存图片                    |
| /zh/ping-tai/instagram/instagram-carousel-downloader                  | Instagram 轮播下载器 — 保存幻灯片                   |
| /zh/ping-tai/facebook/facebook-video-downloader                       | Facebook 视频下载器                            |
| /zh/ping-tai/facebook/facebook-reels-downloader                       | Facebook Reels 下载器                        |
| /zh/ping-tai/facebook/facebook-story-downloader                       | Facebook 故事下载器                            |
| /zh/ping-tai/x-twitter/x-twitter-video-downloader                     | Twitter 视频下载器 – 把 X 视频保存为 MP4             |
| /zh/ping-tai/youtube/youtube-shorts-downloader                        | 下载 YouTube Shorts——将视频转为 MP4              |
| /zh/ping-tai/youtube/youtube-shorts-audio-downloader                  | YouTube Shorts 转 MP3——下载器（Beta）           |
| /zh/ping-tai/threads/threads-video-downloader                         | Threads 视频下载器 – 转为 MP4                    |
| /zh/zhi-nan/bluesky/how-to-copy-bluesky-link-on-web                   | Bluesky — 在网页复制链接                         |
| /zh/zhi-nan/bluesky/how-to-copy-bluesky-link-on-mobile                | Bluesky — 在手机复制链接                         |
| /zh/zhi-nan/youtube/how-to-copy-youtube-short-link-on-web             | YouTube — 在网页复制 Short 链接                  |
| /zh/zhi-nan/youtube/how-to-copy-youtube-short-link-on-mobile          | YouTube — 在手机复制 Short 链接                  |
| /zh/zhi-nan/threads/how-to-copy-threads-link-on-web                   | Threads — 在网页复制链接                         |
| /zh/zhi-nan/threads/how-to-copy-threads-link-on-mobile                | Threads — 在手机复制链接                         |
| /zh/zhi-nan/tiktok/how-to-copy-tiktok-link-on-mobile                  | TikTok — 在手机复制链接                          |
| /zh/zhi-nan/instagram/how-to-copy-instagram-reel-link-from-mobile-app | Instagram — 在手机复制 Reel 链接                 |
| /zh/zhi-nan/instagram/how-to-copy-instagram-link-on-mobile            | Instagram — 在手机复制链接                       |
| /zh/zhi-nan/instagram/how-to-copy-instagram-link-on-web               | Instagram — 在网页复制链接                       |
| /zh/zhi-nan/instagram/how-to-copy-instagram-video-link                | Instagram — 复制视频或 IGTV 链接                 |
| /zh/zhi-nan/instagram/how-to-copy-instagram-photo-link                | Instagram — 复制照片或轮播链接                     |
| /zh/zhi-nan/instagram/how-to-copy-instagram-story-link                | Instagram — 复制 Story 链接                   |
| /zh/zhi-nan/facebook/how-to-copy-facebook-watch-link                  | Facebook — 复制 Watch 链接                    |
| /zh/zhi-nan/facebook/how-to-copy-facebook-link-on-mobile              | Facebook — 在手机复制链接                        |
| /zh/zhi-nan/facebook/how-to-copy-facebook-reel-link                   | Facebook — 复制 Reel 链接                     |
| /zh/zhi-nan/x/how-to-copy-x-post-link                                 | X — 复制帖子链接                                |
| /zh/zhi-nan/douyin/how-to-copy-douyin-link-on-mobile                  | 抖音 — 在手机复制链接                              |
| /zh/zhi-nan/soundcloud/how-to-copy-soundcloud-track-link              | SoundCloud — 复制音轨链接                       |
| /zh/zhi-nan/troubleshooting/link-wont-download                        | 帮助 — 链接无法下载                               |
| /zh/zhi-nan/troubleshooting/private-or-login-walled-link              | 帮助 — 私密或需登录的链接                            |
| /zh/zhi-nan/troubleshooting/wrong-file-or-quality                     | 帮助 — 文件类型或质量不对                            |
| /zh/zhi-nan/troubleshooting/where-files-save                          | 帮助 — 文件保存位置                               |
| /zh/chang-wen                                                         | Frequently asked questions                |
| /terms                                                                | Terms of Service (English)                |
| /privacy                                                              | Privacy Policy (English)                  |
| /copyright                                                            | Copyright / DMCA Policy (English)         |
| /acceptable-use                                                       | Acceptable Use Policy (English)           |
| /platform-disclaimer                                                  | Third-party platform disclaimer (English) |
| /zh/lian-luo                                                          | Contact and abuse reporting               |
| /zh/geng-xin-ri-ji                                                    | Product changelog                         |
| /zh/tou-ming-du                                                       | Transparency                              |
| /zh/an-quan                                                           | Security                                  |
| /zh/llms.txt                                                          | llms.txt summary for this locale          |
| /zh/llms-full.txt                                                     | llms-full.txt for this locale             |

## API endpoints (server)

| Endpoint       | Method | Purpose                                      |
|----------------|--------|----------------------------------------------|
| /api/extract   | POST   | Parse URL, fetch metadata, return media info |
| /api/proxy     | GET    | Stream media to browser (transient pass-through) |
| /api/bundle    | POST   | Disabled — returns structured unavailable response |

## Technical stack

- Framework: Next.js 16 (App Router)
- UI: React 19, CSS Modules
- Fonts: DM Sans, Playfair Display, JetBrains Mono
- Monitoring: Sentry (optional)
- Analytics: Google Analytics 4 (optional)
- Structured data: WebSite, Organization, WebApplication, ItemList, FAQPage, BreadcrumbList

## SEO and discovery

- XML sitemap: /sitemap.xml — English, Spanish, French, and Chinese `<loc>` entries, xhtml hreflang (`en` / `es` / `fr` / `zh` / `x-default`) on paired marketing pages
- robots.txt with AI crawler rules (allows /llms.txt, /llms-full.txt, /es/llms.txt, /es/llms-full.txt, /fr/llms.txt, /fr/llms-full.txt, /zh/llms.txt, /zh/llms-full.txt)
- English inventories: /llms.txt (summary) and /llms-full.txt (this file when locale=en)
- Localized inventories: /es/llms.txt, /es/llms-full.txt, /fr/llms.txt, /fr/llms-full.txt, /zh/llms.txt, /zh/llms-full.txt
- seo-audit/FORMAT_TOOLS_INDEX.md — human-readable format tool registry (repo)
- Open Graph and Twitter Card metadata
- Per-page canonical URLs + hreflang where localized pages are shipped

## Mobile and PWA

- Web App Manifest: /manifest.webmanifest
- theme-color: #0A0A0A
- Apple mobile web app capable
- Mobile-optimized viewport and touch targets
- Decorative effects gated behind `(pointer: fine)` and reduced-motion preferences

## Third-party affiliation

SMDownloader is not affiliated with, endorsed by, or sponsored by Instagram, Meta, Facebook, TikTok, ByteDance, Threads, Bluesky, AT Proto, YouTube, Google, X Corp., Douyin, SoundCloud, or any other social media platform. Platform names and logos belong to their respective owners.

## Prohibited uses

- Downloading copyrighted content without permission
- Private, restricted, paywalled, login-only, or DRM content
- Bypassing access controls or platform protections
- Scraping, bulk automation, or scripted mass downloading
- Harassment, doxxing, or non-consensual content
- Reselling or reuploading downloaded media without rights

## Enforcement

- May block URLs, domains, IP addresses, or entire platforms
- May disable support in response to valid copyright notices
- Service provided as-is; features may change without notice

## Brand

- Brand name: SMDownloader
- Website: https://www.smdownloader.com
- [Instagram (@GetSMDownloader)](https://www.instagram.com/GetSMDownloader/): Official brand profile and product updates
- [Bluesky (@smdownloader.bsky.social)](https://bsky.app/profile/smdownloader.bsky.social): Official brand profile and product updates