DownBolt – Multi-Threaded Download Manager

Multi-connection download manager: faster downloads, resumable, batch sniffing, MD5-verified. Free tier with optional lifetime Pro.

markdown ⚡ **DownBolt — Multi-Threaded Downloads That Actually Use Your Bandwidth** Browsers download big files over a single connection. On long-distance or congested routes that leaves most of your bandwidth idle. DownBolt splits each download into segments and fetches them in parallel — the same trick pro download managers have used for decades — then verifies every byte with an MD5 checksum before handing the file over. --- ### 🌟 Key Features #### 1. 🚀 Multi-Connection Engine - **Up to 16 parallel connections** per file (2 on the free tier) with adaptive scaling: slow segments shrink, fast ones grow. - **HTTP Range aware**: falls back gracefully on servers without range support. - **Auto rate-limit respect**: backs off on HTTP 429/503 instead of hammering. - **Instant pause / resume**, including across browser restarts. #### 2. 🧲 One-Click Batch Sniffing - The "Sniff" panel lists direct-download links and media on the current page. - Check what you want, hit Download — each file gets its own multi-connection engine with per-file progress, pause and resume. - Right-click any link → "Download with DownBolt". #### 3. ✅ Integrity You Can Trust - Every file is **MD5-verified in-flight** before it lands in your Downloads folder. Corrupt transfers are caught instead of silently saved. - Segment data streams to disk-style storage as it arrives — multi-GB files never sit fully in memory. #### 4. 🔒 Privacy by Architecture - Downloads go **directly from the source server to your browser**. The cloud service never sees your files — it only answers "how many connections should this host allow". - No accounts, no tracking pixels, no analytics SDKs. --- ### 💎 Fair & Transparent Pricing - **Free**: 2 connections per file, batch up to 50 links, full MD5 verification, full resume support. Not a trial — free forever. - **Lifetime Pro ($19.99, one-time)**: - Up to 16 connections per file - Unlimited batch size - Priority host rules & future Pro features - Powered by Creem Merchant of Record (cards / Alipay / WeChat Pay where available) --- ### ❓ FAQ **Q: Does DownBolt download faster than the browser?** A: On servers that support byte ranges (most CDNs and file hosts do), parallel segments can significantly improve throughput when a single connection is throttled or high-latency. On servers without range support DownBolt automatically falls back to a single connection. **Q: Can it download videos from YouTube or streaming sites?** A: **No.** DownBolt deliberately does not support DRM or subscription streaming content, and those sites are excluded by design. **Q: Where do files go?** A: Straight into your browser's standard Downloads flow — same folder, same safety checks you already trust. **Q: Is my browsing data uploaded anywhere?** A: No file content ever touches our servers. The extension sends one small request per download asking for a connection plan; you can see exactly what's in it in our privacy policy.