Offsend

Free open-source browser extension masking secrets before they reach ChatGPT, Claude or Gemini.

Browser extensionfreeglobal

Offsend is a free, open-source, local-first browser extension that detects and masks secrets and personal data in prompts before they are sent to ChatGPT, Claude, or Gemini. It helps developers and other professionals reduce the risk of unintentionally sending API keys, passwords, or personal information to AI chat services by automatically obscuring sensitive content prior to submission.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of Offsend - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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