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Shopping on a foreign site? PriceLens keeps the original price and shows it in your currency right beside it.

Works in Chrome and Edge. Everyday conversion needs no account and no API key. The interface is in Chinese for Chinese browsers (Simplified or Traditional) and in English for every other language.

Install from the Chrome Web Store; Edge can install from there too. Updates arrive automatically.

1. Download this repository and unzip it somewhere permanent.
2. Open chrome://extensions (or edge://extensions) and turn on Developer mode.
3. Click Load unpacked and pick the extension folder.
4. Pin the toolbar icon, open the panel, choose My currency, then reload the page you are on.

After pulling an update, reload the extension on the extensions page, then reload open tabs.

Open the panel, pick your currency and leave Convert automatically on. Original prices are never replaced; a small tag appears next to each one.

• Details. Click or tap a tag to see the source currency, rate date, rate source and estimate notes. Hovering shows a summary. With a keyboard, Tab onto one tag, move between tags with the arrow keys, open details with Enter or Space and close with Escape; prices do not each add a Tab stop. A tag inside a product link is plain text: clicking it opens the product as usual, and hovering shows the details.
• Quick convert. The ticket at the top of the panel shows the live rate for a currency pair. Type an amount to convert it.
• Right-click. For a price the page scan missed, or one whose tag had no room beside it (some tight product cards), select it and choose Convert with PriceLens. The result opens in a small dialog on the page. The selection is parsed locally and never sent anywhere.
• Pause a site. Turn on Pause on this site for sites you do not want converted.
• Ambiguous symbols. When $ or ¥ could mean several currencies, PriceLens skips the price rather than guess, unless the page itself names exactly one currency (for example in its product data). Under Rates, recognition and AI you can set Currency on this site (for example, $ means CAD on a Canadian shop) or a Page currency for all sites. The site setting wins. If the current page has prices skipped this way, the panel says how many and links straight to the site setting. Sites match by exact hostname, so www.shop.ca and shop.ca are separate.
• Card fee. Set your card's foreign transaction fee (for example 1.5%) to add it to cross-currency results, so they are closer to what you will be charged. Details say when a fee is included.
• Starting prices. Prices marked with ～ keep their "from" meaning and are never shown as a fixed price.
• List-price difference. Shows the list price minus the current price. It is on by default and can be turned off. It only appears when the page clearly marks a list price (schema.org StrikethroughPrice / ListPrice) or when a product shows exactly one struck-through price and one current price. Member, coupon and other conditional prices are ignored. It is not a guaranteed saving.

Rates are free daily central-bank reference rates, not live trading prices. The European Central Bank (ECB) is preferred. For currencies the ECB does not publish (such as TWD, VND, AED, SAR and RUB), PriceLens uses Frankfurter's blend of several central banks. The details for each conversion name the source of its rate. You can switch to Wise with your own API token. Every result is an estimate. It excludes fees unless you set one, and may differ from the amount you are finally charged.

Everything works without it. When the page alone cannot settle a currency, AI can read the text around that price and choose from a fixed list; if it is unsure, the price is skipped. Amounts, conversion and placement are always computed in your browser.

It needs your own TypeSafe key, which may be billed. Read the notice in the panel before enabling it, and do not enable it on pages with private or sensitive content.

Page text is not uploaded by default. Keys and tokens stay on your device. See the privacy policy.

If an amount is wrong or a tag covers something, pause the site first, then report it in Issues. Hide personal information, and never post a key or token.

Requires Node.js 24 or newer. Tests use only the Node standard library, so there is nothing to npm install.

npm test

Every push and pull request runs the whole suite on GitHub Actions (Ubuntu with Playwright Chromium); any skipped test fails the run.

• The suite covers the product regressions listed in package.json. It uses fake credentials, mocked network and throwaway browser profiles, and never calls a paid service.
• DOM tests need Chromium or Chrome. Point CHROME_BIN at an executable, or they will look for an installed Playwright Chromium headless shell on Windows or Linux. Without a browser they are skipped explicitly. Passing logic tests alone is not a browser verification.
• Store listing text and images are in store/ (see store/LISTING.en.md). node store/render-screenshots.cjs regenerates the screenshots and promo tiles from the real extension UI with mocked APIs and fixed sample rates; it needs full Chromium, like the MV3 smoke test. powershell -NoProfile -File store/package.ps1 (Windows) renders the icons from store/icon-source.png and builds dist/pricelens-<version>.zip from a fixed file list.
• The real MV3 smoke test needs full Chromium (not the headless shell). Set MV3_CHROME_BIN or install Playwright Chromium. It loads the actual extension in a temporary profile with synthetic cached rates and blocked outbound requests. It checks worker messaging, saving settings, toggling pages, right-click results, the quick converter and Enter/Escape. It does not exercise live services, permission prompts or long-term worker eviction.