100%
Free, no paid tier
No usage caps. No watermarks. No trial trap.
100% Free 11 security tools · no signup
Security tools that never see your data
ShieldX is 100% free – no paid tier, no usage caps, no watermarks. Generates, scores and hashes entirely inside your browser using the Web Crypto API. No servers, no accounts, no telemetry – open the tab, get the answer, close it.
- Zero server contact
- No signup, ever
- 100% free, no paid tier
- Open-source code
0 network requests
Verified in devtools
Interactive preview of the ShieldX password generator — click refresh to generate a real password using crypto.getRandomValues(). Strength score, entropy and crack time update live.
q7V!zm2K$pLd9Rx#tW4e
Strength score 100 / 100
Entropy 148 bits
Crack time 4.2×10¹⁸ yrs
Source getRandomValues
NIST 800-63B Pass
Clipboard auto-clear No history stored
NIST SP 800-63B
Compliance checked
- Web Crypto API
- NIST SP 800-63B
- 100% client-side
- No telemetry
- No watermarks
- k-anonymity breach checks
- Open-source verifiable
- Free forever
- GDPR & CCPA aware
- DNS-over-HTTPS
0
Bytes sent to servers
Generation happens in your tab.
5M+
Monthly searches served
Across the security tool niche.
$0
Cost, forever
100% free, supported by donations.
The toolkit
36 focused tools, zero friction
Each tool does one job properly — real entropy math, real standards, no upsell screen in the middle of your workflow.
Passwords
Password Generator
Cryptographically secure passwords from crypto.getRandomValues() — never Math.random().
Open tool
Passwords
Password Strength Checker
Entropy-based scoring with crack-time estimates and NIST SP 800-63B compliance checks.
Open tool
Passwords
Breach Checker
Check exposure in known breaches using k-anonymity — only 5 hash characters ever leave.
Open tool
Passwords
Passphrase Generator
EFF Diceware passphrases — 7,776 curated words, CSPRNG selection, ~77 bits at 6 words.
Open tool
Web & Domain
SSL Certificate Checker
Inspect certificate chains, expiry, protocol versions and cipher strength.
Open tool
Web & Domain
Security Headers Scanner
Audit CSP, HSTS, X-Frame-Options, Referrer-Policy and more with fix recommendations.
Open tool
Why ShieldX
Privacy isn't a setting here — it's the architecture
Across 1,000+ reviews of security tools, the same complaints repeat: price, sync, cloud dependency. ShieldX removes the layer that causes all three.
Nothing leaves your browser
Passwords, files and text are processed in your tab with the Web Crypto API. There is no upload step because there is no server to upload to.
Real entropy, not a length bar
Strength is computed as log2(charset^length) and translated into an honest crack-time estimate — not a green bar that rewards "Password1!".
No account, no email, no cookie wall
Open a tool and use it. Nothing to sign up for, nothing to cancel later.
Verifiable, not just promised
The code is open source. Audit the randomness yourself — or watch the network tab stay empty.
NIST-aligned by default
Checks follow SP 800-63B guidance instead of outdated complexity rules that push users toward predictable patterns.
Built from the complaints
What users actually hate about security tools
Frequency of complaints across Trustpilot, G2, Capterra and Reddit threads on password and security tooling.
Our answer
Every complaint, designed out
- Nothing to subscribe to All 11 tools are free, ad-supported and uncapped — the 40% complaint disappears.
- Nothing to sync No vault, no devices, no conflicts. Results live in your clipboard, not in our cloud.
- One screen per job No dashboards or onboarding flows — the tool is the interface.
- No cloud dependency Offline-capable cryptography; only domain lookups touch the network.
How it works
Three steps. No account in sight.
Pick a tool
Thirty-six focused utilities, one purpose each. No dashboard to learn, no onboarding tour.
Run it locally
Your browser does the cryptography. Watch the network panel — it stays silent.
Copy and close
Results are yours. Clipboard auto-clears, nothing is stored, nothing is logged.
Compare
Where ShieldX differs
Password managers solve storage. ShieldX solves the moment before storage — creating, auditing and verifying secrets without handing them to anyone.
| Capability | ShieldX | 1Password | LastPass | Bitwarden |
|---|---|---|---|---|
| Free forever | Yes | No | ~ limited | ~ limited |
| No signup required | Yes | No | No | No |
| Works without cloud sync | Yes | No | No | No |
| Client-side only processing | Yes | No | No | ~ partial |
| Real entropy scoring | Yes | ~ partial | No | ~ partial |
| Crack-time estimates | Yes | No | No | No |
| Open-source verifiable | Yes | No | No | Yes |
| Bulk SSL & header scanning | Yes | No | No | No |
Swipe the table to compare
Learn
Master security, one concept at a time
Guides, tutorials, cheatsheets and checklists — everything you need to understand the tools you're using and why they work.
Security Guide
A complete walkthrough of entropy, hashing, breach checking and browser cryptography — from beginner to practitioner.
Read the guideTutorials
Step-by-step tutorials for real security tasks — from generating API keys to auditing SSL certificates.
Browse tutorialsCheatsheets
Quick-reference cards for hash types, HTTP headers, cipher suites and common security patterns.
View cheatsheetsBest Practices
NIST-aligned recommendations for passwords, API keys, email authentication and web hardening.
See best practicesSecurity Checklists
Actionable checklists for launching, auditing and maintaining secure web applications.
Get checklistsGlossary
Plain-language definitions of 100+ security terms — from AES to zero-knowledge proofs.
Open glossary From the blog
Security insights, decoded
Password reset security: how to make account recovery safe
Password resets are the weakest link in account security. Learn how to design reset flows that resist social engineering and account takeover.
Read article Password cracking hardware in 2026: GPU vs ASIC vs cloud clusters
A single GPU can guess 100 billion hashes per second. Learn how modern cracking hardware has changed password security requirements.
Read article Passphrase memorability: why four random words beat complex passwords
correct horse battery staple — four random words create 51 bits of entropy and are easier to remember than Tr0ub4dor&3. Learn the science.
Read article FAQ
Questions worth auditing
Security claims deserve scrutiny. Here is exactly what happens — and what never happens.
Is ShieldX really free?
Yes — all 36 tools are free with no paid tier, no usage caps and no watermarks. The site is supported by unobtrusive ads, not by upselling you a subscription.
How can a password generator be secure in a browser?
The Web Crypto API exposes the operating system CSPRNG through crypto.getRandomValues(). It is the same class of randomness used by TLS — and far stronger than Math.random(), which many online generators still use.
Do you ever see my passwords?
No. Generation, scoring and hashing all happen inside your tab. For breach checks we use the Have I Been Pwned k-anonymity model: your password is SHA-1 hashed locally and only the first five characters of that hash are sent.
What about the tools that need a server?
SSL checks, header scans and pixel detection require a TLS handshake or an HTTP request to a third-party site, so they route through a stateless Cloudflare Worker. Only the domain you typed is processed, and nothing is retained.
Is there any tracking or telemetry?
No product analytics, no fingerprinting, no session recording. Your theme preference is the only thing stored, and it lives in your own browser.
Can I self-host or audit the code?
Yes. The implementation is open source so you can review the entropy math, the NIST checks and every network call before you trust it.
100% Free · No signup · No cost
Generate something unguessable right now
148 bits of entropy, a crack-time estimate you can trust, and a clipboard that clears itself after 30 seconds.
Part of the Toolly ecosystem · secure.toolly.site