Saifullah AhadHow I built it
LinkScope: URL InspectorLive on Google PlayLinkScope: see where a link really goes before you open it
URL Inspector, live on Google Play. It follows a link's redirects and checks its security — before you tap.
01
The problem
Links arrive in messages every day, and some lead somewhere other than they say. Once you open one, it is too late to check.
02
The plan I wrote
Paste a link, or share it from any app. LinkScope follows the redirect chain without opening the page, looks up where the address really points, checks HTTPS and the site's security headers, and flags risky link structure. It shows the evidence in plain words and leaves the decision to you.
03
The build
AI coding agents built it from my written specification. My work was the specification, the tests it had to pass, and the review.
04
The proof
Testing found two real bugs: some special characters in links were being doubled, and two unrelated sites under the same country ending (such as .co.uk) were treated as one. A test was written that failed on both; after the fix, all six test cases pass.
The final release was then checked on three real devices — an Infinix phone, a Galaxy Tab S3 and a Galaxy Z Flip4 — with a real two-step redirect, a link shared from another app, and a result that survived a restart.
05
The launch
Live on Google Play, with its privacy page and a store listing that matches what the app really does.
What this shows about how I work
- Tests that fail first: each bug got a test before its fix.
- Evidence, not verdicts: it shows the facts, and you decide.
- Checked on three real devices, not one.
How to check a link before you click it
Once a page is open, it is too late to check it. Before you tap:
- Read the real address. The site is the name just before the first single slash. In paypal.com.account-check.example, the site is account-check.example, not PayPal.
- Expand short links. Short links hide where they go, and one link can pass through several others before it lands.
- Look for lookalikes. Swapped letters, extra words and odd endings are common tricks.
- Do not trust the lock icon alone. HTTPS means the connection is private, not that the site is honest.
- Slow down when a message rushes you. "Act now" and "your account will close" are warning signs.
LinkScope does the checking for you: paste or share a link, and it follows the redirect chain without opening the page, checks where the address really points, HTTPS and security headers, and shows the evidence in plain words. The decision stays yours.
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