Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteBuild each screenshot filename from the URL’s host and path, then add an index or short stable hash so distinct URLs cannot silently overwrite one another. For example, https://example.com/products/blue-mug?ref=email can become example-com-products-blue-mug--001.png. Decide whether query parameters distinguish pages, sanitize the resulting name for your operating system, and make the extension match the image format you actually save.
Choose a filename pattern before capturing
A useful batch filename is readable, predictable, and unique within the output directory. A practical pattern is host-path--index.png or host-path--short-hash.png. These are implementation choices, not a naming standard prescribed by Playwright.
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- Host and path: Make the page recognizable at a glance, such as
example-com-products-blue-mug. - Index: Add a zero-padded position such as
--001when the input order is meaningful and stable. - Short hash: Add a short stable hash of the full URL when distinct input URLs might normalize to the same readable slug.
- Run timestamp: Add a run identifier when each batch should be archived rather than overwrite the previous capture.
Choose one policy for reruns: stable names overwrite known artifacts, while timestamped names preserve separate runs and consume more storage.
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Normalize host and path
Start with the hostname and path. Replace separators and characters awkward in filenames with a consistent delimiter, collapse repeated delimiters, and remove leading or trailing punctuation. For a root URL, use a clear label such as example-com-home rather than an empty path.
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Sanitization rules differ across operating systems and filesystems. Keep names reasonably short, and avoid assuming that every URL character is safe in a path. If a URL contains non-ASCII characters, choose explicitly whether to preserve readable Unicode or normalize it to a restricted character set.
Set a query-string and fragment policy
Query strings can identify different content variants, but often contain tracking values that make filenames noisy. Include only query values that materially change the page being captured. If meaningful parameters are omitted, different pages may receive the same slug, so append an index or hash derived from the full URL or from the meaningful parameters.
Fragments are not sent to the server in an HTTP request, but client-side applications may use them to select content. Decide whether fragments matter for your capture workflow; include them in uniqueness logic if they can change what the browser renders.
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Prevent collisions deliberately
Two different URLs can reduce to the same host-and-path slug—for example, when query parameters are removed. Detect duplicate output paths before starting the capture batch, or add an index or short stable hash. Do not rely on the filesystem’s overwrite behavior to resolve collisions: one page’s screenshot could replace another’s.
Generate names and save screenshots with Playwright
Playwright’s page screenshot API accepts a caller-selected path, and supports full-page capture with fullPage: true (Playwright screenshots documentation). The following Node.js example makes a sanitized host-and-path slug, adds a stable short SHA-256 suffix based on the complete URL, and saves PNG files to a chosen directory.
import { chromium } from 'playwright';
import { createHash } from 'node:crypto';
import { mkdir } from 'node:fs/promises';
import path from 'node:path';
const urls = [
'https://example.com/products/blue-mug?ref=email',
'https://example.com/products/blue-mug?variant=large',
'https://example.com/',
];
function filenameFor(rawUrl, index) {
const url = new URL(rawUrl);
const readable = `${url.hostname}${url.pathname}`
.toLowerCase()
.normalize('NFKD')
.replace(/[\/]+/g, '-')
.replace(/[^a-z0-9._-]+/g, '-')
.replace(/-+/g, '-')
.replace(/^[-._]+|[-._]+$/g, '')
.slice(0, 100) || 'page';
const hash = createHash('sha256').update(rawUrl).digest('hex').slice(0, 8);
return `${String(index + 1).padStart(3, '0')}-${readable}--${hash}.png`;
}
await mkdir('screenshots', { recursive: true });
const browser = await chromium.launch();
try {
const page = await browser.newPage();
for (const [index, url] of urls.entries()) {
const outputPath = path.join('screenshots', filenameFor(url, index));
await page.goto(url, { waitUntil: 'networkidle', timeout: 60000 });
await page.screenshot({ path: outputPath, fullPage: true });
console.log(`${url} -> ${outputPath}`);
}
} finally {
await browser.close();
}Install Playwright and its browser before running the script: npm install playwright, followed by npx playwright install chromium. Save the script as an ES module, for example capture.mjs, then run node capture.mjs. The example keeps the query string out of the readable portion but hashes the full URL, so those two sample product URLs still get different names. If a fragment changes client-rendered content, the hash already distinguishes it because it hashes the raw URL string.
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For a different policy, change filenameFor: remove the hash for stable host-and-path names only if collisions are impossible or checked; omit the index when input order should not affect names; or add a batch timestamp when each run must be retained. If URLs can differ only by equivalent textual encodings, normalize them consistently before hashing.
Use Playwright CLI or Playwright Test when that fits the workflow
Playwright CLI
Playwright CLI accepts an explicit --filename=<f> option. Without one, its documented default is page-{timestamp}.{png|jpeg|webp} in the output directory; the CLI also shows custom names such as login-page.png and full-page.png (Playwright CLI screenshots and PDF commands). An explicit name is handy for one-off captures. For a batch, your loop or calling script should generate a distinct filename for each URL and pass it to the CLI rather than reusing one name.
Playwright Test snapshots
For screenshot assertions, configure Playwright Test’s snapshot path template to organize expected images by test directory, project, test file path, screenshot argument, and extension. This can separate browser-project baselines and keep snapshots near a stable test structure (Playwright API parameters: screenshot path templates). Templates organize test artifacts; they do not decide how an arbitrary URL should be sanitized or guarantee URL-derived uniqueness.
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Match the extension to the captured format
Use a file extension that agrees with the emitted image format. Playwright CLI can infer format from the filename extension and otherwise defaults to PNG; its screenshot tooling documents PNG, JPEG, and WebP (CLI screenshot documentation; Playwright MCP screenshots tool). If your workflow writes JPEG or WebP, generate .jpg or .webp names accordingly rather than labelling the file .png.
Or skip the browser setup:
ScreenshotNeo can return the screenshot directly from one GET request; its parameter names also work with the names used by other screenshot APIs. For this URL, a caller can derive a filename using the same naming policy and save the response under it. See the ScreenshotNeo documentation for request options.
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Troubleshoot naming and batch failures
- One image replaced another: The normalized names collided. Include a stable hash or index and check generated paths for duplicates before capture.
- Names are unreadable or excessively long: Limit the readable host-and-path slug, replace awkward characters consistently, and put uniqueness in a short hash rather than copying the entire query string.
- Different page variants share a filename: Identify the query parameters or fragment that change rendered content and include them in the naming input, or hash the full URL.
- The image format and extension disagree: Set the output extension to the format actually produced by the capture command or API.
- A navigation times out: Check that the URL is reachable from the machine running the browser and adjust the navigation timeout or wait condition for pages that keep network requests open. A timeout is a capture failure, not a filename-generation failure.
- Repeated captures are hard to compare: Use deterministic names for the same inputs and capture settings. Add a run identifier only when retaining each batch separately is intended.
Validate the naming function before a large run
Test representative URLs before launching the full batch: a root path, a trailing slash, a query string, a fragment, non-ASCII text, and two distinct URLs that could normalize to the same slug. Confirm the generated paths are unique, legal for the target filesystem, and carry the correct image extension. Keep the URL-to-filename mapping in logs or a manifest when the output directory alone is not enough to trace an image back to its source.
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Frequently Asked Questions
Does Playwright choose URL-based filenames automatically?
No URL-derived naming algorithm is documented here. Generate the name in your script and pass the path to the screenshot API or an explicit CLI filename.
Should query parameters go in screenshot filenames?
Include only parameters that distinguish rendered variants. If you leave them out, use an index or hash to prevent different URLs from sharing a filename.
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How can I keep screenshots from different test projects separate?
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Quick Recap
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