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Free tools from Siftwright

Small, honest utilities for developers, site owners and security teams. Each one runs on the same infrastructure as our paid API, so when you need it at scale, there's an endpoint for it.

New

Post-quantum TLS checker

Does a domain support X25519MLKEM768 key exchange? Plus group preference, certificate and HSTS, with a migration checklist.

Check a domain → Live

Web data demo

Try the YouTube transcript, screenshot and Google News tools without an account.

Open the demo → New

Qubit Flip

Not a tool, but a free daily logic puzzle for your coffee break. Exact par, streaks, share card.

Play today's puzzle →

Start with one key. Pay only for what works.

Plans from $29/month with 10,000 successful results. Failed requests never count. Cancel anytime from the billing portal.

Get an API key Try the live demo