iOS + Android
Deep Link Checker
Validate your Apple App Site Association and assetlinks.json in one pass. Find the redirect, JSON, or fingerprint problem stopping your links from opening the app.
Free tools
Free tools for links that have to work
Four free SwiftURL tools: a deep link checker for AASA and assetlinks.json, a link and redirect checker, an SMS segment calculator and a Firebase Dynamic Links converter. No signup, no email gate, instant answers.
Redirect tracer
Link & Redirect Checker
Unshorten any link and see the full redirect chain hop by hop, the final destination, HTTPS at each hop, and how long the final domain has been registered.
GSM-7 / UCS-2
SMS Segment Calculator
See character and segment counts, GSM-7 versus Unicode encoding, the characters that force UCS-2, and how many characters a short link saves. No cost guesswork.
FDL migration
Firebase Dynamic Links Converter
Paste old FDL URLs, understand every parameter, and export a CSV shaped for Bulk Link Import to recreate them on a domain you own.
Frequently asked questions
Are these tools really free?
Yes. Every tool is free, needs no signup, and returns results instantly. There is no email gate and nothing is saved to an account.
Do I need a SwiftURL account to use them?
No account is required. The tools work standalone. They also happen to demonstrate what SwiftURL does, so if you like them, the product is a click away.
The tools show it. The product does it.
Branded links, deep linking, safety checks, and analytics, on your own domain. Start free.