If your installed Puppeteer API provides HTTPResponse.asFetchResponse(), use await puppeteerResponse.asFetchResponse(). Puppeteer’s Next API documents this helper, but the versioned Puppeteer 25.12.0 HTTPResponse reference does not list it. Check the documentation for the version installed in your project; if the helper is unavailable, construct a Fetch Response from the Puppeteer response’s body, headers, and status.
Use Puppeteer’s conversion helper when available
When the installed Puppeteer version exposes the method, conversion is one line:
const fetchResponse = await puppeteerResponse.asFetchResponse();The method is asynchronous and returns a Fetch API Response. For example, if you already have a Puppeteer HTTPResponse in a variable named puppeteerResponse, you can read the converted response with standard Fetch methods:
const fetchResponse = await puppeteerResponse.asFetchResponse();
console.log(fetchResponse.status);
console.log(await fetchResponse.text());The Puppeteer Next HTTPResponse API documents the helper. Do not infer that it exists in every release: the versioned Puppeteer 25.12.0 HTTPResponse API does not list it, and the Next documentation reviewed here does not establish the first stable release that included it.
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What the helper handles
Puppeteer documents that the helper copies headers and parses multiline Set-Cookie values into individual entries. It omits the body for status codes 101, 204, 205, and 304. The body may be re-encoded based on response headers or browser heuristics, so the result is not guaranteed to preserve the original response bytes exactly.
Fallback: construct a Fetch Response yourself
If asFetchResponse() is missing, the versioned Puppeteer API documents content(), headers(), status(), and statusText(). You can use those values to create a Fetch Response:
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const fetchResponse = new Response(await puppeteerResponse.content(), {
status: puppeteerResponse.status(),
statusText: puppeteerResponse.statusText(),
headers: puppeteerResponse.headers(),
});This is a manual mapping of Puppeteer’s documented response fields, not a guarantee that it reproduces every behavior of asFetchResponse(). In particular, do not assume it handles multiline Set-Cookie values or bodyless status codes exactly like the helper. Check the constructed response in the runtime and use case that matter to you.
content() resolves to a Uint8Array. Puppeteer warns that response content may have been re-encoded, so using bytes here does not by itself ensure fidelity to the original network bytes. See the Puppeteer 25.12.0 content() reference.
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In the versioned Puppeteer API, header names are lowercase. Duplicate header values are combined into comma-separated values, except Set-Cookie, which Puppeteer represents as newline-separated values. If your code manually maps headers, account for this distinction. The helper’s documented parsing of multiline Set-Cookie values is a reason to prefer it when it is available and its behavior suits your task.
Choose the right route for your installed version
| Route | When to use it | Important behavior |
|---|---|---|
asFetchResponse() |
The installed Puppeteer API exposes the method. | Documented to return a Promise<Response>, copy headers, split multiline Set-Cookie values, and omit bodies for statuses 101, 204, 205, and 304. Body bytes may be re-encoded. |
Manual new Response(...) |
The method is unavailable and a Fetch Response is still needed. |
Maps Puppeteer’s documented content, headers, status, and status text. Equivalence to the helper’s special handling is not established; verify edge cases in your runtime. |
Use the versioned API documentation matching the Puppeteer release installed by your project rather than relying on the Next page alone. Puppeteer describes the HTTPResponse constructor as internal and says third-party code should not call it directly or subclass HTTPResponse; use the response object returned by Puppeteer instead.
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Troubleshooting and edge cases
asFetchResponse is not a function: Your installed API may not expose the helper. Confirm the project’s Puppeteer version and its matching API reference, then use the manual construction pattern if appropriate.- Construction fails on a status code: Check whether the status permits a response body in your target runtime. Puppeteer’s helper explicitly omits bodies for 101, 204, 205, and 304; do not assume the fallback handles those cases identically.
- A cookie header does not appear as expected: Puppeteer represents
Set-Cookieseparately from ordinary combined duplicate headers. The helper documents parsing multiline cookie values; verify the result if using manual construction. - Response bytes differ from what you expected: Puppeteer warns that content can be re-encoded according to headers or browser heuristics. Neither conversion route should be treated as a guarantee of original-byte fidelity.
- You are considering subclassing or directly constructing
HTTPResponse: Avoid it. Puppeteer documents that the constructor is internal and advises third-party code not to call it or extend the class.
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For example, save a screenshot as WebP with cURL:
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpSee the ScreenshotNeo API documentation for request options. It removes supported cookie-consent banners, newsletter popups, and chat widgets before capture; those cleanup steps can be turned off. An MCP server offers screenshot tools for AI agents, and the free plan includes 1,000 screenshots per month without a card; paid plans start at $5 for 3,000. Sign up for the free plan.
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Frequently Asked Questions
Does the Puppeteer 25.12.0 HTTPResponse reference document asFetchResponse()?
No. The versioned HTTPResponse reference for Puppeteer 25.12.0 does not list the method; Puppeteer’s separate Next API does.
Does converting a Puppeteer response guarantee the original network bytes?
No. Puppeteer warns that response content can be re-encoded based on headers or browser heuristics.
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