How to stop data leaks in Claude
Claude is popular with engineering and legal teams for long document work. Those long context windows invite full contract, source file, and policy uploads that contain exactly the data your DLP policy protects. LeakSnitch watches this surface locally so sensitive data never reaches Claude.
Short answer
Claude is an AI platform from Anthropic. LeakSnitch scans text inputs, file uploads, and drag and drop content on claude.ai with publicly auditable patterns, and blocks or redacts sensitive data before the request is submitted. Detection runs entirely on the device and takes under 50 milliseconds.
The most common Claude leaks
- Entire source files with hardcoded secrets
- Contracts and legal documents with counterparty PII
- Anthropic API keys pasted while building Claude integrations
How LeakSnitch protects Claude
- 1Install the browser extension from the Chrome Web Store. It activates automatically when you visit claude.ai.
- 2Every prompt you type, paste, or upload is scanned locally against 55+ public patterns covering API keys, passwords, tokens, PII, and internal data.
- 3Context signals and entropy analysis score each match, and checksum validators confirm high stakes identifiers like credit cards and Aadhaar.
- 4When sensitive data is detected, LeakSnitch blocks or redacts the submission in under 50 milliseconds, before it reaches Claude.
Frequently asked questions
Does LeakSnitch work on Claude for free?
Yes. The free individual tier includes full detection on Claude and every other supported platform, with no limits on the number of AI tools you use.
Can Claude read data LeakSnitch blocks?
No. LeakSnitch intercepts the submission before it is sent, so blocked or redacted data never reaches Claude, its provider, or third parties.
Is Claude usage monitored without permission?
LeakSnitch only activates on the text you type into supported AI platforms. It never reads browsing history, other sites, or content outside the AI page. In enterprise deployments, admins set the policy and users see every detection in the modal.
Protect other AI platforms too
Stop AI leaks on the device, not in the cloud.
Install LeakSnitch in under 30 seconds and protect every prompt sent to ChatGPT, Claude, Gemini, and 25+ AI tools. Free for individuals.