Show HN: Offsend – local Mac app that masks secrets before AI tools see them (github.com)

Offsend, a local Mac application, has been launched to enhance the security and integrity of data shared with AI tools. This innovative menu bar app allows users to prepare projects, files, and clipboard text by masking sensitive information — such as API keys and personal data — before they are processed by models like ChatGPT and Claude. Unlike many cloud-based solutions, Offsend emphasizes privacy by conducting all checks locally on macOS, without requiring a cloud account or server-side scans. The significance of Offsend for the AI/ML community lies in its potential to facilitate safer interactions with AI tools while maintaining data confidentiality. Key features include the ability to audit a folder's readiness for AI coding, find and mask sensitive information, and support for a variety of file formats, including plain text, PDFs, and documents. The app’s built-in detectors identify a range of sensitive patterns, offering both free and pro options depending on the user’s needs. Offsend operates entirely on the user's machine, ensuring that no content is uploaded for scanning, thereby addressing significant privacy concerns inherent to AI tool integrations.