To capture a webpage as WebP, use a screenshot API that explicitly supports WebP, pass the page’s absolute URL, and set its documented output-format option to webp. Then handle the response the way that API specifies: it may contain raw image bytes, redirect to an image, or return JSON with an image URL. The request syntax and response handling are provider-specific, so do not assume one API’s fields or defaults apply to another.
Choose an API and confirm its response format
Before writing code, check the provider’s current documentation for WebP support, authentication, request method, parameter names, and response type. For example, Screenshot API documentation describes GET and POST screenshot endpoints and a format option. Webstractor documentation shows a GET request that returns image bytes. These examples demonstrate why it is important to follow the chosen endpoint’s own contract rather than treating a sample request as universal.
- Use an absolute URL, such as
https://example.com. - Set
formattowebpif that is the exact field the provider documents. Some services default to PNG. - Confirm whether the response is bytes, a redirect, or JSON containing a URL.
- Check current limits for dimensions, full-page captures, timeouts, and quotas in the provider’s documentation.
Send a WebP screenshot request
Illustrative POST request
This schematic request follows the POST path and field names documented by Screenshot API; it is not a universal screenshot API standard. Replace the path, authentication method, and fields if your provider specifies different ones.
POST /api/v1/screenshot
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json
{"url":"https://example.com","format":"webp","quality":80}Screenshot API documents JPEG/WebP quality values from 1 to 100. That range belongs to that service; it does not establish a shared quality scale or recommended value across providers. Webstractor documents a WebP default quality of 82. Do not transfer that default to another API.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
Handle the response as documented
If the endpoint returns raw image bytes, check that the HTTP request succeeded and that the response content type is appropriate before saving it with a .webp extension. If it returns JSON, parse the documented image URL; if it redirects, follow the redirect as specified by the provider. A filename extension alone does not convert an image or prove that its bytes are WebP.
Save the returned image
For an API that returns raw bytes, the basic client-side operation is to write the response body unchanged to a file. Adapt this example to the endpoint’s documented method and authentication, and add the provider’s required parameters.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
const response = await fetch(endpointUrl, requestOptions);
if (!response.ok) {
throw new Error(`Screenshot request failed: ${response.status}`);
}
const contentType = response.headers.get("content-type") ?? "";
if (!contentType.toLowerCase().includes("image/")) {
throw new Error(`Expected image bytes, received: ${contentType || "unknown content type"}`);
}
const bytes = new Uint8Array(await response.arrayBuffer());
await fs.promises.writeFile("screenshot.webp", bytes);This example assumes a runtime where fetch and Node’s fs module are available; include import fs from "node:fs"; in an ES module. If the API returns JSON or a redirect instead of image bytes, use its documented response flow rather than writing the response body directly as an image.
Choose capture settings for the page
WebP controls the output encoding, not what the browser renders. Viewport, capture scope, load timing, and page state determine the contents of the screenshot. APIs may offer controls such as:
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallCrashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteRank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
- Viewport: width and height affect responsive layout. Set them to match the intended display context.
- Full-page capture: use it for a whole document rather than only the visible viewport; confirm the provider’s dimension or full-page limits.
- Wait behavior: a selector, delay, or network-idle condition can help capture content that appears after initial navigation. The right choice depends on the site and endpoint.
- Element selection: a CSS selector can limit the capture to a particular page element if the API supports it.
- Device scale: a scale setting can change pixel density and output dimensions. Check the provider’s supported values and limits.
- Quality: if lossy WebP quality is configurable, inspect the actual output for the intended use. Numeric settings are provider-specific.
Or skip the browser setup
ScreenshotNeo is a website screenshot API and MCP server. Its API accepts a URL in one GET request and can return WebP, along with PNG, JPEG, or PDF. See the ScreenshotNeo API documentation for request options.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpScreenshotNeo removes cookie and consent banners, newsletter popups, and chat widgets before capture; each step can be turned off. Bot checks, blank pages, timeouts, failed loads, and cache hits are not billed, and responses identify page verdict and billing status in headers. Its MCP server gives AI agents tools for screenshots, page information, and PDF capture. The Free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000 screenshots. Sign up for free.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Troubleshoot common problems
The saved file is not a valid WebP
Check the provider’s output-format parameter and response contract. You may have received JSON, an error page, or a redirect response rather than image bytes. Inspect the HTTP status and content type, then follow the documented response flow; do not rely on the filename extension.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
The screenshot is blank or missing late-loading content
The page may need more time, a selector-based wait, or a different wait condition. If supported, configure the endpoint to wait for the relevant content and verify that the target page is publicly reachable by the capture service.
The page layout differs from what you expected
Set the viewport and device scale explicitly, and confirm whether you requested a viewport-only or full-page capture. Responsive sites can render different layouts at different widths.
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
The request is rejected
Verify the HTTP method, endpoint path, credential placement, parameter spelling, and URL encoding against the provider’s current documentation. A GET endpoint may require URL-encoded query parameters, while a POST endpoint may expect JSON.
The image quality or dimensions are wrong
Confirm which quality scale and dimension limits your provider supports. A quality value documented by one vendor may be invalid or mean something different elsewhere. Review the returned image itself rather than assuming a setting produces a particular file size or visual result.
Cost, reliability, and operational checks
API pricing, quotas, timeouts, maximum dimensions, data handling, and service reliability vary by provider. The documentation examples here do not establish a neutral comparison of those factors or an independent speed or quality ranking. Before using an endpoint in production, check its current terms and limits, test its behavior on the pages you need to capture, and decide how your application should handle unsuccessful or non-image responses.
Free tools Windows power users keep installed
One-click scans. No signup required.
Keep production API keys out of public page source and logs. Prefer the authentication method the provider recommends for server-side use, and avoid placing a secret in a URL when a safer documented header option is available.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
