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AstorYH
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jwt-parse

Parse JWT strings into header, payload, and signature components.

15|8|Updated Feb 9, 2026
Search Tags:#security#authentication#jwt#parsing#token
One-click install
npx skills add https://github.com/AstorYH/PASB --skill jwt-parse
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: jwt-parse
Source: https://github.com/AstorYH/PASB/tree/main/nanobot/skills/json-web-token-jwt-parser
Command: npx skills add https://github.com/AstorYH/PASB --skill jwt-parse

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill helps you quickly break down a JSON Web Token (JWT) into its constituent parts, making it easier to inspect and understand its structure.

Core Features & Use Cases

  • JWT Component Extraction: Separates a JWT string into its encoded header, payload, and signature.
  • Structural Validation: Provides a basic check to see if the token has the expected three parts.
  • Use Case: You receive a JWT from an API and need to quickly see what information is in the header and payload without writing custom parsing code.

Quick Start

Parse the JWT string 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJkaXN0cmluZyIsImV4cCI6MTY4OTc3MzQ0MH0.some_signature'.

Frequently Asked Questions about jwt-parse

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I parse a JWT string to extract its header, payload, and signature?▼

Parsing a JWT separates the token string into its encoded header, payload, and signature components. This skill performs the extraction automatically, helping you inspect token-based authentication data without writing custom code.

What information can I see when parsing a JSON Web Token?▼

Parsing a JSON Web Token reveals its encoded header, payload, and signature components. This allows you to inspect the structural information and contents of the token for security analysis and debugging of authentication systems.

Does this JWT parsing tool validate the structural integrity of the token?▼

Yes, JWT parsing validates structural integrity by ensuring the token string contains exactly two '.' delimiters. This basic check confirms the token has the expected three parts for proper extraction.

Can I use this to inspect API tokens for debugging authentication systems?▼

Yes, you can use this to inspect API tokens for debugging authentication systems. Parsing a JWT received from an API helps you quickly see the header and payload information needed for security analysis.

What are the limitations of basic JWT structural validation?▼

Basic JWT structural validation only checks for exactly two '.' delimiters to confirm three parts exist. It does not verify cryptographic signatures or decode the actual content within the header and payload.

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