Code & Token Validators Hub – JSON Linter, JWT Decoder & Regex Tester
Validation and parsing tools pinpoint syntax errors, decode authentication claims, and test regular expression pattern matching before code reaches production servers.
🛠️ Validators & Parsers Tools (10)
JSON Validator
Check if your JSON data is syntax-valid and see descriptive error details if parse fails.
JWT Decoder
Decode and extract information from JSON Web Tokens (JWT) client-side without compromising security.
Regex Tester
Test, evaluate, and match regular expressions against test text inputs in real-time.
User Agent Parser
Analyze and extract browser type, OS version, engine, and device vendor from a user agent string.
URL Parser & Query String Splitter
Break down an absolute URL into its components: host, port, protocol, path, and parsed query variables.
IP Address & Client Info Lookup
Detect your current public IP address, browser dimensions, device details, and screen depth.
ASCII & Character Code Lookup
Find character keys, ASCII codes, binary codes, Hex encodings, and HTML entity representations.
MIME Types Quick Reference
Lookup common file extensions and their corresponding MIME Content-Types.
HTTP Status Codes Reference
Review common HTTP response status codes, categories (1xx-5xx), and standard descriptions.
Phone Number Standardizer
Format phone numbers into clean international formats, extracting country and area dialing codes.
💡 Category FAQs: Validators & Parsers
Q: Is it safe to decode JWT tokens online?
Yes! Decoding runs 100% client-side via browser Base64URL parsing. Your token is never uploaded over HTTP.
Q: How does syntax validation work?
Parsers inspect input character streams against official RFC grammar specs and report precise error line numbers.