toolkit.lukealbertson.com

toolkit

34 free, browser-based tools for SOC analysts, sysadmins, and developers. Fast. Private. No signup required.

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Encoding / Decoding
Magic Paste
Paste anything — JWT, base64, JSON, IP, hash, MAC, timestamp, UUID — auto-detected and decoded instantly.
Base64 Encode / Decode
Encode or decode Base64 strings and files instantly in your browser.
URL Encode / Decode
Percent-encode or decode URLs and query string components.
HTML Entity Encode / Decode
Convert special characters to HTML entities and back.
Hex / ASCII / Binary Converter
Convert between hexadecimal, ASCII text, and binary — all three synced live.
ROT13 / Caesar Cipher
Apply ROT13 or any Caesar shift (0–25) with optional brute-force output.
Defang / Refang URLs and IPs
Defang or refang IOCs for safe sharing in tickets and chat.
Hashing
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files.
Hash Identifier
Identify the type of an unknown hash by length and character set.
Network / IP
Subnet Calculator
Calculate network address, broadcast, host range, and mask for any CIDR block.
My IP + Details
See your public IP address, geolocation, ASN, and ISP instantly.
server
DNS Lookup
Query A, AAAA, MX, TXT, NS, CNAME, and more for any domain.
server
Whois Lookup
Look up domain registration info, registrar, and name servers via RDAP.
server
SPF / DKIM / DMARC Checker
Validate email authentication records for any domain.
server
SSL / TLS Certificate Decoder
Parse PEM certificates to inspect SANs, validity dates, issuer, and key info.
HTTP Header Checker
Fetch and analyze response headers for any URL, with security header grading.
server
Port Number Reference
Search TCP/UDP port numbers and service names — filter by port or keyword.
MAC Address Vendor Lookup
Identify the hardware vendor from a MAC address OUI.
SOC / Analyst
Email Header Analyzer
Paste raw email headers to trace routing path, authentication results, and spot phishing indicators.
CVE Lookup
Fetch CVE details, CVSS score, affected products, and references from NVD.
server
Log Timestamp Normalizer
Normalize mixed-format timestamps from logs to UTC ISO 8601 and Unix epoch.
User Agent Parser
Parse any user agent string to identify browser, OS, device type, and bots.
Crypto / Security
JWT Decoder
Decode and inspect JWT header, payload, claims, and expiry — no server needed.
Password / Passphrase Generator
Generate cryptographically secure passwords or passphrases with entropy estimate.
String Entropy Calculator
Calculate Shannon entropy and assess if a string is plaintext, encoded, or encrypted.
Developer / Sysadmin
AI Token Counter
Estimate token count and cost for GPT-4, Claude, Gemini, and more.
Diff Checker
Side-by-side diff viewer with line-level highlighting for added, removed, changed.
Epoch / Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and back, with relative time.
JSON Formatter / Validator
Format, minify, and validate JSON with syntax highlighting and error location.
YAML ↔ JSON Converter
Convert between YAML and JSON with syntax validation.
Cron Expression Builder
Build cron expressions visually or parse them to plain English with next run times.
Chmod Calculator
Calculate Unix file permissions — toggle checkboxes or enter octal notation.
UUID / GUID Generator
Generate v4 or v7 UUIDs in bulk — copy individually or download as text.
HTTP Status Code Reference
Searchable reference for all HTTP status codes with descriptions and RFC links.