MTRlens

Tracking since Apr 1, 2026.

Changelog

• Apr 27, 2026
  description

  # MTRlens
  **Link quality from MTR output · Mathis formula**
  A Chrome extension that turns MTR (My Traceroute) report output into a clear quality score and comparison. Paste your MTR results, get a 0–100 score based on the Mathis TCP throughput model, compare multiple paths side by side, and export or print reports.
  ---
  ## What it does
  - **Score a single path** — Paste MTR report output, name the path (e.g. “LA CN2”, “SJC 163”), and get a 0–100 score, RTT/loss/jitter, Mathis Q, estimated throughput, and short diagnostics.
  - **Compare multiple paths** — Add several MTR runs; the extension ranks them and shows a comparison chart. When scores are close, it warns about Braess-style congestion risk and suggests splitting traffic by score ratio.
  - **Recognize backbones** — Detects common cross-border backbones in the hop list (e.g. CN2, 163, 9929, CMI) and labels the line type.
  - **History & export** — Recent analyses are saved (configurable limit). Export a text report to the clipboard or open the report in a new tab for printing/PDF.
  Scoring is tuned for **cross-border links** (e.g. from China to overseas). Endpoints with RTT < 100 ms are treated as non–cross-border and not scored. The last hop is always used for metrics; intermediate hops with very high loss are treated as ICMP noise and skipped when choosing the endpoint.
  ---
  ## How the score works
  The main score is based on the **Mathis approximation** for TCP throughput:
  - **Q ∝ 1 / (RTT × √loss)**  
    Q is mapped to 0–100 using reference bounds (Q ≈ 1 for barely usable, Q ≈ 40 for premium cross-border quality). Higher score means better throughput potential.
  - **Jitter** is not folded into this Q; it is applied as a separate penalty so that high jitter reduces the final score without distorting the RTT/loss relationship.
  - **Single path:** one absolute score. **Multiple paths:** a mixed display score (absolute × 0.7 + relative × 0.3) so you see both “how good this path is” and “how it ranks in this set.” Ranking is by the relative score; when all paths are very close (Q spread < 3), the UI falls back to absolute score and notes that differences are within measurement noise.
  ---
  ## How to use
  1. Run MTR in **report mode** (e.g. `mtr -r -c 100 <target>` on Linux/macOS, or WinMTR in report mode on Windows).
  2. Copy the full output and paste it into the extension’s **Input** tab.
  3. Enter a line name and click **Analyze**.
  4. View the result on **Analyze** (single-path details and timeline), then use **Compare** if you have multiple paths, and **Report** (in a new tab) for export/print.
  The in-extension **Help** page has step-by-step instructions and algorithm notes.
  ---
  ## Tech
  - **Chrome extension**, Manifest V3, no external dependencies.
  - **Languages:** English, 简体中文, 繁體中文 (UI and reports follow browser language).
  - **Privacy:** All processing is local; no data is sent to any server.
  ---
  ## Permissions
  - **clipboardRead** — Used to read pasted MTR text and to offer “paste from clipboard” when MTR-like content is detected. Optional; you can type or drag a file instead.
  ---

  Turn raw MTR traceroute output into a clear 0–100 quality score. Paste your results, instantly see how good your network path really is — with latency, loss, and jitter broken down per hop. Compare multiple ISP lines side by side to find the best route, auto-detect backbone types like CN2, 9929, CMI, and 163, and spot peak-hour congestion at a glance. Export or print clean reports for your team. Built for anyone choosing VPS providers, diagnosing cross-border connectivity, or optimizing server routes. 100% local — your data never leaves your browser.

• Apr 27, 2026
  short_description

  MTR link quality · Mathis formula

  MTR link quality analysis · MQS formula scoring

Permissions & access

Permissions

clipboardRead

Host access

None declared

Screenshots

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