Fetch fully JavaScript-rendered HTML from a page with the Browserless /content REST API
domain: docs.browserless.io · 6 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
POST https://production-sfo.browserless.io/content?token=YOUR_API_TOKEN with Content-Type: application/json; auth via the ?token= query parameter (a 401 means the token is missing/invalid).
Body is { "url": "https://example.com/" } to navigate, or { "html": "..." } to render inline HTML instead.
Response is the fully rendered page as text/html (response.text()) - including content added by client-side JS after initial load.
Add gotoOptions {waitUntil: load|domcontentloaded|networkidle0|networkidle2, timeout} to control when the page is considered loaded before extraction.
For async-rendered content, add waitForSelector {selector, timeout} or waitForTimeout (ms) or waitForFunction {fn, timeout} so the DOM is ready before capture.
Use rejectResourceTypes/rejectRequestPattern to block images/CSS and speed up when you only need markup. Ref: https://docs.browserless.io/rest-apis/content
Known gotchas
An empty/minimal HTML response usually means the page hadn't finished loading - increase waitForTimeout or add waitForSelector rather than assuming the site is unreachable.
networkidle0 (0 connections for 500ms) can hang on pages with long-polling/analytics beacons; networkidle2 (<=2 connections) is safer for those.
/content gives no bot-detection bypass by itself; sites actively blocking scrapers return partial/blocked content and need /unblock or BrowserQL.
waitForEvent fires only on custom page-dispatched events, not lifecycle events like load/DOMContentLoaded - use gotoOptions.waitUntil for those.
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