Shows the CPU, memory and network load caused by the site you are looking at, as live graphs.
Users
7
+1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#224K
#188K among extensions
Version
0.1.0
updated 18 Aug 2026
Users
monthly, 2 months
Latest, 16 Oct 2026:7 usersMove the mouse over the chart for any month
Ratings count
monthly, 2 months
Latest, 16 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About webWorks
webWorks shows how much of your computer the site you are looking at is actually using — live, in a small panel in the top-right corner of the page.
CPU (main-thread occupancy), memory (JS heap) and network down/up are sampled once a second and drawn as graphs. You can see which tab is spinning up your fan without ever opening the browser's task manager, and you can turn it off the moment you are done.
■ WHAT IT DOES
• Four live graphs — CPU occupancy, JS heap, network down and up. Down and up share a unit, so they sit on one chart as two series.
• Three time ranges — 1 min (1s interval), 5 min (5s average), 1 hour (1m average). All three buffers fill at the same time, so switching ranges never loses history.
• Crosshair tooltip — move over a graph and all three charts point at the same instant. Keyboard focus plus the arrow keys reads the same values.
• Table view — every sample drawn on the graph, plus min, average and max. Nothing depends on telling colours apart.
• CSV / JSON export — the ⤓ in the footer. CSV is a plain table of the current range's samples that drops straight into a spreadsheet, pandas or R; JSON carries all three ranges plus cumulative totals and how each number was measured. You see a preview before saving.
• Collapsed state — shrinks to a one-line pill: "CPU 12% · 148MB · 34.2KB/s". It covers almost none of the page.
• Drag to move — grab the header; the position is remembered on the next page.
• Three themes — system / light / dark, with system following your OS setting in real time.
• Two languages — Korean and English, plus a system option that follows your browser. Changing it redraws an open panel in place, without interrupting the measurement.
• Off means off — closing the panel disconnects the observers and timers, and once no tab is being measured, every request listener is detached too.
■ HOW TO USE IT
• Click the webWorks icon, then "Measure this tab".
• Alt+Shift+W toggles the panel on the current tab.
• "Start automatically on every site" turns it on whenever a page loads.
• ⏸ freezes the display (collection continues) · ⌄ collapses · ✕ stops measuring · ⤓ exports.
Measurement counts from the moment you turn it on. Navigating away resets the counters.
■ HOW IT MEASURES — AND WHAT IT CANNOT SEE
An instrument that hides its limits cannot be trusted, so here they are.
• CPU — from PerformanceObserver('longtask') and a 100ms timer-lag probe, whichever is larger, divided by the sample interval. This is main-thread occupancy, not process CPU usage: Web Workers, the GPU, the compositor and other frames are excluded. That is why the panel labels it "CPU · main thread".
• Memory — performance.memory.usedJSHeapSize, falling back to measureUserAgentSpecificMemory(). It is the renderer's JS heap only; DOM nodes, images and GPU textures are not included, and other frames sharing the process are mixed in.
• Network down — Resource Timing transferSize, topped up with Content-Length where a cross-origin response masks the size. Cache hits count as zero, which is correct.
• Network up — reconstructed from the request line, request headers and body. It does not account for HTTP/2 and HTTP/3 header compression, so it reads higher than reality. Read it as a trend, not an absolute.
Known limits: graphs stall in background tabs (Chrome throttles their timers hard, and a stretched sample is discarded rather than drawn as garbage); iframes are not instrumented, only the top frame; and the panel cannot run on chrome:// pages, the Chrome Web Store or other extension pages, because the browser forbids script injection there.
The exact per-process numbers would require chrome.debugger, which puts a "being debugged" banner on every tab. webWorks deliberately stays on web standard APIs instead: a little less accurate, but quiet, light, and switchable at any moment.
■ PRIVACY
No data leaves your machine. No network requests, no remote reporting, no analytics, no account. Every number lives in tab memory and disappears when you close the panel. The only things stored are your settings — theme, language, default range, auto-start and panel position.
■ PERMISSIONS
• webRequest — the only window onto upload bytes and request counts. It observes only; it never blocks or modifies a request.
• storage — saves the settings listed above.
• scripting — injects the measurement scripts into tabs that were already open before the extension was installed or reloaded. The files it injects are fixed and packaged; no remote code is ever executed.
• Access to all sites — needed to measure on whichever site you are on.
Requires Chrome 116 or newer.
Open source, MIT licensed.
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webWorks는 지금 보고 있는 사이트가 내 컴퓨터를 얼마나 쓰고 있는지를 페이지 오른쪽 위 작은 패널에 실시간으로 보여줍니다.
CPU(메인 스레드 점유율), 메모리(JS 힙), 네트워크 수신/송신을 1초에 한 번 재서 그래프로 그립니다. 브라우저 작업 관리자를 열지 않아도 어느 탭이 팬을 돌리고 있는지 보이고, 다 봤으면 바로 끌 수 있습니다.
■ 무엇을 하나
• 실시간 그래프 4종 — CPU 점유율, JS 힙, 네트워크 수신/송신. 수신과 송신은 단위가 같아 한 차트에 두 계열로 올립니다.
• 시간 범위 3종 — 1분(1초 간격) · 5분(5초 평균) · 1시간(1분 평균). 세 버퍼가 동시에 차기 때문에 범위를 바꿔도 기록이 사라지지 않습니다.
• 십자선 툴팁 — 그래프 위로 움직이면 세 차트가 같은 순간을 함께 가리킵니다. 키보드 포커스 + 화살표 키로도 같은 값을 읽습니다.
• 표 보기 — 그래프에 그려진 모든 샘플과 최소·평균·최대. 색만으로 구분해야 하는 상황을 만들지 않습니다.
• CSV / JSON 내보내기 — 푸터의 ⤓. CSV는 현재 범위 샘플만 담은 순수한 표라 스프레드시트·pandas·R에 그대로 들어가고, JSON은 세 범위 전부와 누적 합계, 측정 방식까지 함께 담습니다. 저장 전에 미리보기가 뜹니다.
• 접기 — 한 줄 알약으로 줄어듭니다: "CPU 12% · 148MB · 34.2KB/s". 페이지를 거의 가리지 않습니다.
• 끌어서 이동 — 헤더를 잡아 옮기면 위치가 저장되어 다음 페이지에서도 유지됩니다.
• 테마 3종 — 시스템 / 라이트 / 다크. 시스템은 OS 설정을 실시간으로 따라갑니다.
• 언어 2종 — 한국어 / 영어, 그리고 브라우저 언어를 따르는 시스템 옵션. 바꾸면 열려 있는 패널이 그 자리에서 다시 그려지고, 측정 기록은 끊기지 않습니다.
• 끄면 진짜 꺼집니다 — 패널을 닫으면 옵저버와 타이머가 해제되고, 측정 중인 탭이 하나도 없으면 요청 리스너까지 전부 뗍니다.
■ 사용법
• 툴바의 webWorks 아이콘 → "이 탭 측정".
• Alt+Shift+W 로 현재 탭의 패널을 켜고 끕니다.
• "모든 사이트에서 자동 시작"을 켜면 페이지가 열릴 때마다 알아서 켜집니다.
• ⏸ 화면 정지(수집은 계속) · ⌄ 접기 · ✕ 측정 종료 · ⤓ 내보내기.
측정은 켠 순간부터 셉니다. 페이지를 벗어나면 카운터가 초기화됩니다.
■ 어떻게 재고, 무엇은 못 보는가
한계를 감추는 계측기는 믿을 수 없으니 그대로 적습니다.
• CPU — PerformanceObserver('longtask')와 100ms 타이머 지연 프로브 중 큰 쪽을 샘플 간격으로 나눈 값. 프로세스…