URL Payload Security Inspector
URL Payload Security Inspector: Inspects query parameters and path segments for double decoding flaws, directory traversal (`./`), and script injections.
About this url payload security inspector
URL Payload Security Inspector — browser-based utility.
How this tool works
Implements client-side URL Payload Security Inspector operations. Inspects query parameters and path segments for double decoding flaws, directory traversal (`../`), and script injections specifically designed for a security analyst audits a suspicious url for double percent-encoding, path traversal, and xss payload attempts.
- Token Structure Extraction: Splits JWT strings on '.' delimiters into Header, Payload, and Signature segments.
- Base64URL Decoding: Decodes URL-safe Base64 segments into raw JSON strings without executing unverified signature payloads.
- Claims Parsing & Timestamp Evaluation: Parses registered claims ('exp', 'nbf', 'iat', 'iss', 'aud') and checks current clock validity.
- Cryptographic Status Reporting: Displays token signature algorithm (RS256, HS256, ES256, EdDSA) and warns that client decoding does not verify cryptographic signatures without the public key.
Worked example
Scenario: A security analyst audits a suspicious URL for double percent-encoding, path traversal, and XSS payload attempts.
Sample input:
Processing: Inspects query parameters and path segments for double decoding flaws, directory traversal (`../`), and script injections.
Illustrative output:
Limits and verification
Rejects strings that do not contain exactly two '.' delimiters. Explicitly informs the user that client-side decoding inspects token claims but CANNOT verify mathematical signature validity unless the corresponding public key/secret is supplied.
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
- WHATWG URL Standard
- RFC 3986 (Uniform Resource Identifier: Generic Syntax)
Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology
How to use it
- Enter, paste, or select your input data into the URL Payload Security Inspector workspace controls.
- Review available parameter fields, units, formats, or options configured for your task.
- Click the action button or observe immediate live calculations rendered in your browser runtime.
- Inspect the resulting output and any diagnostic messages, then copy or download the result if needed.
Frequently asked questions
What does URL Security Inspector examine?+
It analyzes a supplied URL string for local risk indicators such as encoded path or query payload patterns.
What did the browser fixture verify?+
The doubly encoded dot-path and encoded script query fixture returned a result containing risk output.
Does a low-risk result make a URL safe?+
No. It is not a remote fetch, malware scan, authorization check, or browser sandbox.
Does it follow redirects?+
No. The current tool inspects entered text locally and does not resolve or request the destination.