Check before posting. You decide what changes.

Confusables checks English comments and posts for words that may need another look: its/it’s, your/you’re, then/than and seven more. The check runs when the author presses Post, and suggestions are offered for review.

The author can edit the draft or continue as written. The demo keeps the original wording and publishes nothing. An optional API endpoint can also return a copy with suggested replacements applied.

Earlier evaluation on informal comments. On September 28, 2026, an earlier engine build (5135a5b), run locally, changed 245 of 50,000 sentences of informal comments. Of 100 of those changes, drawn at random and reviewed in-house, 67 were judged correct, 31 damaging and 2 unclear. The 50,000 sentences are the ones first measured on September 11, 2026, so this re-measures a reused sample; it is not a new independent evaluation.

Engine timing excludes network and hosting delays. Benchmark details. For social platforms, /v1/check returns suggestions and their positions so authors can review changes before publishing.

Public demo only. Don't submit confidential, personal, regulated, or security-sensitive information. Privacy

This demo shows how a platform could offer suggestions before posting. Nothing is published.

Ten sets: its/it's, your/you're, then/than, who's/whose, lets/let's, there/their/they're, lose/loose, affect/effect, accept/except, could of → could have. Nine are enabled by default; affect/effect is optional and enabled in this demo.

You can also try a prepared example for each rule:

This example shows a suggestion in the sentence while the domain is left unchanged. Recognized URLs, email addresses, handles and code are also protected: