For a screenshot API with explicitly documented fractional device pixel ratios, ScreenshotOne is the clearest match: its device_scale_factor option accepts values from 1 to 5, including 2.25. ScreenshotNeo is the first alternative to try if clean captures and clear billing outcomes matter more than a documented fractional-DPR range: its supplied feature details do not specify a custom DPR control. This is a documentation-based comparison, not a hands-on test.
Which screenshot API supports custom DPR most clearly?
ScreenshotOne’s options documentation names device_scale_factor as its device pixel ratio control, gives a range of 1 through 5, and includes 2.25 as a fractional example. It also documents viewport width and height separately and says an explicit scale-factor value can override the value selected by a device preset. ScreenshotOne options documentation
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That makes ScreenshotOne the strongest documented fit when the requirement is specifically to set a fractional DPR through a hosted screenshot API. It does not establish that ScreenshotOne is faster, more reliable, or produces better-looking images than alternatives; no head-to-head test is available here.
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What DPR changes—and what it does not
The viewport controls the page’s CSS layout dimensions; DPR controls how many output pixels represent each CSS pixel. For example, a 400-by-800 CSS-pixel viewport captured at a device scale factor of 2 can produce an image of approximately 800 by 1,600 pixels. Actual output can depend on the capture and image-processing options in use.
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Do not confuse DPR with resizing a finished image. DPR affects browser rendering and the pixel density of the capture. An image resize or thumbnail option changes image dimensions as a separate operation. ScreenshotOne documents viewport dimensions and device scale factor independently, as well as image sizing options. ScreenshotOne options documentation
Screenshot API and browser-automation options
| Option | What the reviewed documentation establishes | What to check before adopting it |
|---|---|---|
| ScreenshotNeo | A website screenshot API and MCP server. Its supplied feature details do not state that it accepts a custom device scale factor, so do not assume it meets a specific fractional-DPR requirement. It is useful when clean captures, explicit page verdicts and billing outcomes, or agent integration are priorities. ScreenshotNeo | Confirm whether its current API supports the exact DPR control your workflow requires. For a strict fractional-DPR requirement, ScreenshotOne’s cited documentation is more explicit. |
| ScreenshotOne | Documents device_scale_factor values from 1 to 5, including fractional values such as 2.25; independent viewport dimensions; and overrides for preset settings. Official options documentation Official viewport devices documentation |
Check current pricing, plan limits, throughput and service-level terms with the vendor; those details are not established here. |
| Browserless | Its screenshot REST API guide lists viewport sizing and device scale factor, along with full-page capture, clipping, formats and element selectors. Official screenshot REST API guide | The reviewed guide does not specify the accepted scale-factor range or confirm fractional values. Verify exact accepted values in the full current API reference before relying on fractional DPR. |
| Playwright (self-managed) | Its screenshot option distinguishes CSS-scale output from device-scale output. Device-scale output uses device pixels and can make high-DPI screenshots larger. Playwright Page API | Playwright is browser automation software, not a hosted screenshot API. Its documented scale choice is css or device, not an arbitrary numeric DPR parameter. |
Set a fractional DPR with ScreenshotOne
Use the vendor’s current API reference for the exact request format and authentication. The documented option is device_scale_factor; set the CSS viewport dimensions independently. A preset can provide a starting point, but explicit viewport and scale-factor options can override the preset’s corresponding values. ScreenshotOne options documentation ScreenshotOne viewport devices documentation
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- Choose the CSS layout size. Set the viewport width and height for the page layout you need, not for the final multiplied pixel dimensions.
- Set
device_scale_factor. Use the desired value in the documented 1–5 range; a value such as2.25is explicitly shown in the documentation. - Check preset interactions. If you also choose a device preset, make sure the explicit viewport and scale-factor values are present so they override preset values where intended.
- Inspect the returned image dimensions. Confirm the output dimensions and appearance in your own workflow; the documented range alone does not guarantee identical rendering across sites or capture settings.
For requests carrying access keys, authorization headers, cookies or other sensitive data, ScreenshotOne advises using HTTPS. Its getting-started documentation explains that HTTP does not encrypt those values in transit. ScreenshotOne getting-started documentation
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsOr skip the browser setup: ScreenshotNeo
ScreenshotNeo is a hosted screenshot API and MCP server; it can return PNG, JPEG or WebP screenshots, or a PDF, from one GET request. The supplied ScreenshotNeo details do not specify a custom DPR parameter, so use it when its capture workflow fits rather than assuming a particular fractional device scale factor. ScreenshotNeo API documentation
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- 【Height Adjustable】: The height of this cell phone tripod with remote can be adjusted from 17” to 64” and the easy lock mechanism makes it really easy to set up. It gives you an excellent vantage point for capturing photos and videos.
- 【Wide Application】: Compatable with different phone and camera, this tripod is great for photography and video recording, perfect for travel and home use.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpWith ScreenshotNeo, cookie banners are accepted or removed before capture, and known newsletter popups and chat widgets can be removed; each cleanup step can be turned off. Bot checks or CAPTCHAs, blank pages, timeouts, failed loads and cache hits are not billed, and response headers report the page verdict and billing status. Its MCP server provides take_screenshot, get_page_info and capture_pdf tools for AI agents. The free plan includes 1,000 shots per month with no card; paid plans start at $5 for 3,000 shots. See the API documentation or sign up for 1,000 free screenshots a month, with no card.
How to choose for your workflow
- Fractional DPR is mandatory: ScreenshotOne is the most clearly documented choice in this comparison. Confirm your viewport, chosen factor and output dimensions in your integration.
- You need a hosted API, but can verify the exact DPR values: Browserless documents device scale factor support, but verify fractional-value acceptance with its current API reference before committing.
- You want to operate the browser runtime yourself: Playwright gives you browser automation and a CSS-versus-device output scale choice. Plan separately for running and maintaining the browser infrastructure.
- Clean shots and transparent billing outcomes are the priority: Consider ScreenshotNeo, while checking its current documentation for any DPR control your use case requires.
Performance, reliability and cost considerations
There is no measured latency, reliability or image-quality comparison in the cited documentation, so those should be tested against your own target pages and request volume rather than inferred from the feature lists. High-DPI output can be larger because it contains more pixels; that can increase storage and transfer needs. Playwright’s documentation explicitly distinguishes device-pixel output from CSS-pixel output. Playwright Page API
Current ScreenshotOne and Browserless prices, quotas and service-level terms were not established here. Check each vendor’s current terms directly before estimating recurring costs. For ScreenshotNeo, the stated pricing is Free for 1,000 shots per month with no card, Starter at $5 for 3,000, Growth at $15 for 15,000, Pro at $39 for 60,000, Scale at $99 for 250,000, and Business at $249 for 1,000,000; yearly billing gives two months free, and every feature is on every plan. ScreenshotNeo
Rank #4
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Troubleshooting DPR and screenshot output
The image is smaller or larger than expected
- Check both viewport dimensions and
device_scale_factor. The viewport is the CSS layout size; DPR affects output pixel density. - Check whether an image resize or thumbnail option is changing the finished image independently of DPR.
- Inspect actual returned image dimensions instead of assuming that every capture pipeline preserves the browser’s raw output size.
A device preset seems to ignore the custom factor
For ScreenshotOne, the documentation says an explicit scale-factor option overrides the preset’s setting; explicit width and height can override preset dimensions. Confirm that the values are included in the request and that the parameter name is spelled device_scale_factor. ScreenshotOne options documentation
A fractional value is rejected or behaves unexpectedly
ScreenshotOne documents fractional values including 2.25. For Browserless, the reviewed guide confirms a device scale-factor option but not its numeric range or fractional-value support. Check the current full API reference or vendor support before treating a rejected value as a rendering issue. Browserless screenshot REST API guide
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- Whether you're an amateur, enthusiast or professional, this is a must-have accesory for shooting on the go
High-DPI output is too large for the next step
Device-pixel output includes more pixels than CSS-scale output. If the target system has a fixed dimension or file-size requirement, decide whether you need true high-DPI browser rendering or simply a resized final image; those are different operations. Playwright Page API
Frequently Asked Questions
Is 2.25 a valid ScreenshotOne device scale factor?
Yes. ScreenshotOne’s options documentation gives 2.25 as an example within its documented 1–5 range.
Does Browserless support fractional device scale factors?
The reviewed screenshot guide lists device scale factor as an option but does not specify whether fractional values are accepted. Verify against Browserless’s current full API reference.
Does Playwright let me set an arbitrary numeric DPR in its screenshot option?
The reviewed Page API describes the screenshot scale choice as CSS or device output, not as an arbitrary numeric DPR setting.
Quick Recap
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