Free Cybersecurity Tools Every Indie Developer Should Bookmark (2026)
Security gets ignored until it can't be — and by then it's expensive. The good news: a lot of solid checks are free and take minutes. Here are the categories every indie developer should have bookmarked.
1. Password & credential checkers
Tools that tell you if a password or email shows up in known breaches. Run them before you reuse anything important.
2. Website header & TLS scanners
Quick scans that grade your security headers and certificate setup, with concrete fixes. A 2-minute check that catches embarrassing gaps.
3. Dependency vulnerability scanners
Your code is mostly other people's code. Scanners flag known-vulnerable packages so you can patch before someone exploits them.
4. Hash & encoding utilities
For verifying file integrity and debugging tokens — handy when you're shipping anything that touches auth.
5. DNS & domain inspectors
Confirm your DNS, SPF, and DMARC are set so your email lands and your domain isn't easy to spoof.
6. Privacy & exposure checks
See what your site leaks publicly — exposed endpoints, verbose errors, or stray debug routes.
How to actually use these
Don't run them once. Put a 10-minute security pass on your calendar monthly. Most breaches exploit the boring stuff these tools catch.
Frequently asked questions
Are free cybersecurity tools good enough?
For most indie products, yes — free scanners catch the common, high-impact issues. Pay for deeper tooling only once you have real scale or compliance needs.
What should I check first?
Start with credential/breach checks, security headers, and dependency vulnerabilities — those cover the most common attack paths.
How often should I run security checks?
A short monthly pass is enough for most small teams. Automate dependency scanning in CI so it runs on every change.
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