Best Free Security Tools
Our best free security tools shortlist highlights high-utility Fneno tools for 2026. Criteria: usefulness, speed, privacy, and multilingual support. Open any tool below to try it free.
⭐ Featured tools
All tools in this collection
JWT Generator (HS256)
Create signed JWT tokens with your secret
Nginx Security Headers
Nginx add_header security snippet
Password Breach Checker
Check if password appeared in known breaches
Password Strength Checker
Score passwords and get security tips
PDF Unlock (Remove Password)
Unlock PDF you own by re-exporting pages
Secure Password Hash (PBKDF2)
PBKDF2-SHA256 hash for dev testing
SRI Hash Generator
Subresource Integrity sha256/sha384 hashes
Tunisia Social Security Calculator
Estimate Tunisia CNSS contributions
UUID Generator
Generate RFC-compliant UUID v4 identifiers instantly
Password Generator
Generate strong, secure passwords instantly
AI Hashtag Generator
Generate trending hashtags for Instagram, TikTok and X
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes
JWT Decoder
Decode and inspect JWT tokens instantly
PDF Protect
Add password protection to your PDF
About this collection
❓ Frequently Asked Questions
We prioritize popularity signals (hot/new), coverage of the topic, and everyday usefulness — not paid placement.
Related collections
Free Online Tools — 800+ Utilities, No Signup | Fneno
Browse 800+ free online tools for PDF, AI writing, calculators, images, finance, and more. Fast, private, multilingual — start free on Fneno.
Best Free PDF Tools (2026) | Fneno
Best Free PDF Tools on Fneno — curated free utilities you can use in your browser without signup.
Best Free AI Writing Tools (2026) | Fneno
Best Free AI Writing Tools on Fneno — curated free utilities you can use in your browser without signup.
Best Free Online Calculators (2026) | Fneno
Best Free Online Calculators on Fneno — curated free utilities you can use in your browser without signup.
Best Free Image Tools (2026) | Fneno
Best Free Image Tools on Fneno — curated free utilities you can use in your browser without signup.
Best Free Developer Tools (2026) | Fneno
Best Free Developer Tools on Fneno — curated free utilities you can use in your browser without signup.
Explore more on Fneno
Browse every free tool, multilingual hubs, and language pages — no signup required.