SecureLint scans every page in Chrome for API keys, passwords, tokens, and 100+ secret types — using both regex pattern matching and entropy analysis — all in real time, 100% locally.
Add to Chrome — FreeSecret detection is the automated identification of sensitive strings — API keys, passwords, tokens, private keys, and database credentials — in digital environments. Traditionally this is a CI/CD concern (tools like GitLeaks scan source code before commit), but browser-level secret detection is increasingly critical.
Developers spend most of their day in a browser. Secrets appear everywhere: in web app configurations, AI chat windows, cloud dashboards, browser DevTools, environment variable editors, and copied clipboard content. None of these are scanned by traditional code-level secret detectors.
SecureLint fills this gap with continuous, real-time secret detection at the browser level — catching credentials the moment they appear on any page, in any context.
Multiple detection techniques to maximize coverage while minimizing false positives.
Exact pattern matching for known API key formats — AWS AKIA..., OpenAI sk-..., Stripe sk_live_... and 80+ more provider-specific signatures.
Common credential patterns not tied to a specific provider — password=..., api_key=..., Authorization: Bearer ... — catch-all patterns for custom implementations.
Statistical detection of high-entropy random strings. API keys and cryptographic secrets are typically much more random than regular text — flagged by their statistical profile.
User-defined regex patterns for internal secret formats — proprietary tokens, internal project IDs, custom credential schemas specific to your organization.
Six contexts where credentials show up unexpectedly — all scanned by SecureLint.
Code-level scanners only catch secrets that reach source control. Browser detection catches the ones that never should.
| Scenario | SecureLint | GitLeaks / TruffleHog | SAST Tools |
|---|---|---|---|
| API key pasted into ChatGPT | ✅ Detected | ❌ Never scanned | ❌ Never scanned |
| Secret in cloud dashboard UI | ✅ Detected | ❌ Never scanned | ❌ Never scanned |
| Credential in browser DevTools | ✅ Detected | ❌ Never scanned | ❌ Never scanned |
| Secret committed to git | ⚠️ If opened in browser | ✅ Detected | ✅ Detected |
| Real-time detection (no commit needed) | ✅ | ❌ | ❌ |
| Works for non-developers | ✅ | ❌ | ❌ |
Secret detection is the broader category — identifying any sensitive string in a digital environment. Credential scanning typically refers specifically to username/password pairs. SecureLint does both, plus API keys, tokens, private keys, and high-entropy strings.
Yes. SecureLint scans the rendered page content, which includes values loaded by JavaScript, dynamically populated fields, and inline HTML content.
Yes. SecureLint works on all pages loaded in Chrome, including localhost, 127.0.0.1, and private network addresses. This is especially useful for developers testing local applications that load real credentials from environment files.
Entropy analysis measures the randomness of a string. API keys and cryptographic secrets are typically high-entropy (very random) compared to regular text. SecureLint flags strings above a certain entropy threshold that are likely to be secrets, even if they don't match a known provider pattern.
Secret detection works in incognito mode if you enable it in the Chrome extension settings. By default, Chrome extensions require explicit permission to run in incognito windows.
100+ secret patterns. Entropy analysis. 100% local. Free to start.