⚙DEV-BELT/Docs/Cybersecurity
Open Dev-Belt →
🛡

Cybersecurity Tools

55 browser-based cybersecurity tools for developers. All run 100% in your browser — no data sent to servers, no signup required for free tools.

55 Total Tools11 Free44 Pro
Git / Version ControlDevOps & InfrastructureNetworking / HTTPData InspectionTesting / QAFrontend / UIAI ToolsText UtilitiesDocumentationMath & HashingPackage ToolsDebuggingCybersecurityCloud & InfrastructureWeb3 / Blockchain
Base64 Encoder / Decoderfree
Encode and decode Base64 strings
base64encodingcybersecurity
URL Encoder / Decoderfree
Encode and decode URL components
urlencodingcybersecurity
HTML Entity Encoderfree
Encode and decode HTML entities
htmlencodingxss
Hex Encoder / Decoderfree
Convert text to hex and back
hexencodingcybersecurity
Binary Text Converterfree
Convert between text and binary
binaryencodingcybersecurity
ROT13 Cipherfree
Apply ROT13 cipher to text
cipherencodingcybersecurity
Caesar Cipherfree
Apply Caesar cipher with configurable shift
cipherencodingcryptography
Morse Code Converterfree
Convert text to and from Morse code
morseencodingcipher
SHA-256 Hash Generatorfree
Generate SHA-256 hashes via Web Crypto API
sha256hashcryptography
SHA-512 Hash Generatorfree
Generate SHA-512 hashes via Web Crypto API
sha512hashcryptography
MD5 Hash Generatorfree
Generate MD5 hashes (educational only)
md5hashcybersecurity
HMAC Generatorpro
Generate HMAC authentication codes
hmacauthenticationapi-security
Hash Identifierpro
Identify hash types by length and format
hashcryptographysecurity
Hash Comparison Toolpro
Compare two hashes for equality
hashcomparisonsecurity
Password Generatorpro
Generate strong passwords with configurable rules
passwordsecurityrandom
Password Strength Checkerpro
Check password strength and entropy
passwordsecurityentropy
Passphrase Generatorpro
Generate memorable passphrases
passphrasesecuritypassword
Password Entropy Calculatorpro
Calculate password entropy and crack time
passwordentropysecurity
Have I Been Pwned Checkerpro
Check if password appeared in data breaches
hibppasswordbreach
JWT Decoderpro
Decode and inspect JWT tokens
jwtauthenticationapi-security
JWT Header Analyzerpro
Analyze JWT header algorithms for security issues
jwtsecurityauthentication
API Key Generatorpro
Generate cryptographically random API keys
api-keysecurityrandom
Secret Key Generatorpro
Generate AES-256 and other secret keys
secret-keyaescryptography
UUID v4 Generatorpro
Generate cryptographically secure UUID v4
uuidrandomcryptography
TOTP Code Simulatorpro
Simulate TOTP 2FA codes (educational)
totp2famfa
IP Address Analyzerpro
Analyze IPv4 addresses: type, class, binary
ipnetworkingsecurity
CIDR Subnet Calculatorpro
Calculate subnet details from CIDR notation
cidrsubnetnetworking
MAC Address Lookuppro
Look up MAC address OUI and vendor
macnetworkingsecurity
Port Number Referencepro
Reference common port numbers and services
portsnetworkingsecurity
XSS Payload Detectorpro
Detect XSS patterns in input strings
xsssecurityweb
SQL Injection Scannerpro
Detect SQL injection patterns in input
sql-injectionsecuritydatabase
String Entropy Analyzerpro
Analyze string entropy for randomness detection
entropysecuritycryptography
Null Byte Detectorpro
Detect null bytes and injection patterns
null-bytesecurityinjection
Regex Security Analyzerpro
Detect ReDoS vulnerabilities in regex patterns
regexredossecurity
Security Headers Analyzerpro
Analyze HTTP security headers
security-headershttpweb
CSP Builderpro
Build Content Security Policy headers
cspsecurity-headersxss
CORS Policy Analyzerpro
Analyze CORS headers for security issues
corssecurityapi
Cookie Security Checkerpro
Check cookie security attributes
cookiessecurityweb
HTTP Auth Header Decoderpro
Decode Basic and Bearer auth headers
authhttpsecurity
PEM Certificate Decoderpro
Decode PEM certificates and private keys
ssltlscertificates
TLS Cipher Referencepro
Reference TLS cipher suites with security ratings
tlssslciphers
Certificate Expiry Checkerpro
Check SSL certificate expiry dates
sslcertificatesexpiry
Email Header Analyzerpro
Analyze email headers for DKIM, SPF, and spam
emailsecurityspam
User-Agent Fingerprinterpro
Fingerprint browsers from User-Agent strings
user-agentfingerprintingsecurity
Robots.txt Analyzerpro
Analyze robots.txt for sensitive paths
robots.txtseosecurity
Sitemap Analyzerpro
Analyze XML sitemaps for sensitive URLs
sitemapseosecurity
XOR Cipher Toolpro
Apply XOR cipher for data obfuscation
xorciphercryptography
One-Time Pad Encryptorpro
Generate one-time pad keys and encrypt
otpciphercryptography
Checksum Verifierpro
Verify file checksums with multiple algorithms
checksumhashdata-integrity
Data URI Decoderpro
Decode data URIs and preview images
data-uriencodingweb
CVE Reference Lookuppro
Look up major CVE vulnerability details
cvevulnerabilitysecurity
Firewall Rule Generatorpro
Generate iptables, ufw, and nftables rules
firewalliptablesufw
OWASP Top 10 Referencepro
Reference guide to OWASP Top 10 vulnerabilities
owaspsecurityvulnerabilities
JWT Attack Simulatorpro
Simulate common JWT attacks for learning
jwtsecurityattacks
HTTP Method Testerpro
Test which HTTP methods are allowed on an endpoint
httpsecurityapi

About Cybersecurity Tools on Dev-Belt

Dev-Belt provides 55 cybersecurity tools that run entirely in your browser. Tools include: Base64 Encoder / Decoder, URL Encoder / Decoder, HTML Entity Encoder, Hex Encoder / Decoder, Binary Text Converter, ROT13 Cipher, Caesar Cipher, Morse Code Converter, and more.

All tools are privacy-first — your data never leaves your browser. Free tools require no signup. Pro tools unlock advanced functionality with a Dev-Belt Pro subscription.

Other Categories

⌷
Git / Version Control
12 tools
🐳
DevOps & Infrastructure
12 tools
↻
Networking / HTTP
10 tools
◈
Data Inspection
10 tools
⚗
Testing / QA
9 tools
◻
Frontend / UI
12 tools

Dev-Belt — dev-belt.com — 55 Cybersecurity tools, all browser-based.