Security Tools
43 toolsHash generators, encryption tools and security utilities.
Hash, encrypt, and audit — security utilities that stay on your device. Generate MD5, SHA-1, SHA-256, and SHA-512 hashes; encrypt or decrypt with AES; build strong passphrases; analyze password strength; verify file integrity; and inspect SSL/TLS, security headers, and DNS records on any public URL. Because everything runs locally, you can hash sensitive strings or test cipher round-trips without ever exposing them. Useful for engineers verifying download checksums, security teams running quick audits, and anyone wanting better personal password hygiene.
Which security tools tool should I pick?
- Verify a downloaded file is intactCompare your hash to the publisher's checksum.
- Check if a password is strong enoughLive entropy and crack-time estimate.
- Encrypt a short note for safekeepingIndustry-standard symmetric encryption, fully client-side.
- Audit a site's security headersReports HSTS, CSP, X-Frame-Options, and more.
Frequently asked questions
Are these security tools really free?
Yes — every security tool on iwanttools is 100% free with no signup, no trials, and no usage limits. We don't charge for any feature.
Do these security tools work offline or in private?
Every tool runs entirely in your browser using JavaScript. Once the page loads, your input never leaves your device — no server upload, no tracking, no logging.
Which security tool should I use for verifying a download?
Use the comparison table above to pick the right tool for your scenario. The "Best tools for…" section also groups tools by common goals so you can jump straight to what fits.
Do I need to install anything?
No installation, no extension, no account. Open the tool page, use it, and close the tab — that's the entire workflow.
Can I use these tools on mobile?
Yes, every tool is mobile-optimized with large tap targets, a 16px input minimum to prevent iOS zoom, and a layout that adapts to phone screens.