Free Security Tools Online
Security tools demand trust, and trust starts with architecture: every tool in this category runs 100% in your browser. Passwords are generated with cryptographic randomness, hashes are computed locally, and nothing you type is ever sent anywhere — which is exactly how security utilities should behave.
Base64 Decoder
Decode Base64 to text free with NToolHub. Handles standard and URL-safe Base64 with full Unicode support — 100% in your browser, nothing uploaded.
Open tool →Base64 Encoder
Encode text or files to Base64 free with NToolHub. Unicode-safe with URL-safe output and MIME line-wrap options — runs 100% in your browser.
Open tool →Basic Auth Generator
Build HTTP Basic Auth headers free with NToolHub. Base64 credentials with a ready curl example — Unicode-safe, 100% in your browser, nothing uploaded.
Open tool →BCRYPT Hash Generator
Hash passwords with bcrypt free with NToolHub. Adjustable cost factor, plus password verification against hashes — 100% in your browser, nothing uploaded.
Open tool →Checksum Generator
Create MD5, SHA-1, SHA-256 or SHA-512 checksums free with NToolHub. Hash text or files locally to verify integrity — nothing is uploaded.
Open tool →CSRF Token Generator
Generate CSRF tokens free with NToolHub. Cryptographically secure hex tokens for form protection, 16–64 bytes — 100% in your browser, nothing uploaded.
Open tool →File Hash Checker
Check any file's MD5 and SHA-256 hash free with NToolHub. Compare against expected checksums to verify downloads — 100% in your browser.
Open tool →Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes at once with NToolHub’s free tool. Compare algorithms side by side — private in-browser hashing.
Open tool →HEX Decoder
Convert hexadecimal to text free with NToolHub. Tolerates spaces, colons and 0x prefixes with UTF-8 validation — 100% in your browser, nothing uploaded.
Open tool →HEX Encoder
Convert text to hexadecimal free with NToolHub. Unicode-safe with uppercase, separator and 0x-prefix options — 100% in your browser, nothing uploaded.
Open tool →HTACCESS Password Generator
Create bcrypt .htpasswd entries free with NToolHub. Generate secure username:hash lines for Apache basic auth — 100% in your browser, nothing uploaded.
Open tool →HTML Decoder
Decode HTML entities to plain text free with NToolHub. Convert & and ' back to characters instantly — 100% in your browser, nothing uploaded.
Open tool →HTML Encoder
Escape HTML special characters free with NToolHub. Convert code to safe entities for display — live encoding, 100% in your browser, nothing uploaded.
Open tool →JWT Decoder
Decode JWT tokens instantly with NToolHub’s free decoder. Read header and payload, check expiry — signatures never leave your browser.
Open tool →JWT Generator
Generate unsigned test JWTs instantly with NToolHub’s free tool. Custom header and payload, live decode preview — test-only, private.
Open tool →MD5 Generator
Generate MD5 hashes instantly with NToolHub’s free tool. Live hashing as you type, uppercase option, file checksum mode — private.
Open tool →Password Generator
Generate strong, random passwords free with NToolHub. Set length and character sets, check entropy live — everything runs 100% in your browser.
Open tool →Password Strength Checker
Test your password strength free with NToolHub. Entropy scoring, common-password detection and crack-time estimates — analyzed 100% in your browser.
Open tool →Pin Generator
Generate secure random PINs free with NToolHub. Custom length, leading-zero and repeat controls, bulk output — 100% in your browser, nothing uploaded.
Open tool →Random Number Generator
Generate truly random numbers free with NToolHub. Set any range, pick unique or sorted results, and copy instantly. Secure, fast, no sign-up.
Open tool →Random String Generator
Generate random strings free with NToolHub. Custom charsets, hex mode and bulk output with secure randomness — 100% in your browser, nothing uploaded.
Open tool →Secure Token Generator
Generate secure random tokens free with NToolHub. API keys and session IDs in hex, Base64 or URL-safe form — 100% in your browser, nothing uploaded.
Open tool →SHA1 Generator
Generate SHA-1 hashes instantly with NToolHub’s free tool. Live hashing, file checksum mode, uppercase option — 100% private.
Open tool →SHA256 Generator
Generate SHA-256 hashes instantly with NToolHub’s free tool. Live text hashing, local file checksums — secure, fast, 100% private.
Open tool →SHA512 Generator
Generate SHA-512 hashes instantly with NToolHub’s free tool. 128-char digests, live hashing, file checksums — 100% private in-browser.
Open tool →Strong Password Generator
Create extra-strong passwords and memorable passphrases free with NToolHub. Bulk-generate up to 20 at once with secure randomness, in your browser.
Open tool →URL Decoder
Decode percent-encoded URLs free with NToolHub. Restore readable text from %20-style encoding instantly — 100% in your browser, nothing uploaded.
Open tool →URL Encoder
Percent-encode URLs free with NToolHub. Full-URL, component and form encoding modes with live results — 100% in your browser, nothing uploaded.
Open tool →Username Generator
Generate unique usernames free with NToolHub. Adjective-noun-number combos in 4 styles, bulk output — 100% in your browser, nothing uploaded.
Open tool →UUID Generator
Generate version 4 UUIDs instantly with NToolHub’s free tool. Cryptographically random, bulk mode, uppercase option — 100% private.
Open tool →About Our Security Tools
Generate strong passwords, verify hashes, encode tokens, and test password strength below — all private by design.