Troubleshooting Library

Debug Guides: Common Mistakes & Fixes

Comprehensive troubleshooting guides for the most frustrating developer errors. Real error messages, root causes, step-by-step debugging, and preventive checklists.

8
Debug Guides
45
Errors Covered
20
Tools Referenced
Authentication Data Formats Date & Time Encoding Regex Security
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Authentication 10 errors

10 Common JWT Decoding Errors and How to Fix Them

Debug and fix the most common JWT token errors: malformed tokens, expired claims, algorithm mismatches, Base64url padding, and signature failures. Step-by-step solutions with code examples.

how to fix JWT JWT decoding error jwt malformed
.*
Regex 5 errors

Why Your Regex Isn't Matching: Complete Debugging Guide

Debug regular expressions that silently fail: missing flags, greedy vs lazy quantifiers, catastrophic backtracking, and cross-language differences. Practical examples with fixes.

regex debugging regex not matching why regex doesn't work
B64
Encoding 5 errors

Base64 Encoding Gotchas with Special Characters

Fix Base64 encoding issues with Unicode, binary data, URL-safe variants, padding errors, and cross-platform differences. Complete guide with code examples.

base64 encoding errors base64 special characters base64 common mistakes
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Data Formats 5 errors

YAML Parsing Mistakes and Solutions

Fix YAML parsing errors: indentation issues, type coercion surprises, multiline strings, special characters, and the Norway problem. Complete debugging guide.

YAML parsing errors YAML indentation error YAML common mistakes
{ }
Data Formats 5 errors

JSON Schema Validation: Common Pitfalls

Fix JSON validation errors: trailing commas, type mismatches, encoding issues, nested object validation, and schema draft compatibility. Practical debugging guide.

JSON schema validation errors JSON common pitfalls JSON parsing errors fix
%20
Encoding 5 errors

URL Encoding Edge Cases and Special Characters

Fix URL encoding bugs: double encoding, plus vs %20, Unicode in URLs, fragment handling, and encodeURI vs encodeURIComponent confusion. Complete guide.

URL encoding errors URL encoding special characters encodeURIComponent vs encodeURI
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Date & Time 5 errors

Timestamp Conversion Errors Across Timezones

Fix timestamp bugs: milliseconds vs seconds confusion, timezone offset errors, DST transitions, Y2038 problem, and ISO 8601 parsing pitfalls. Complete guide.

timestamp conversion errors timezone conversion bugs Unix timestamp wrong
#
Security 5 errors

Hash Mismatch Debugging: Why Your SHA Doesn't Match

Debug hash mismatches: encoding differences, trailing newlines, BOM markers, algorithm confusion, and hex case sensitivity. Complete troubleshooting guide.

hash mismatch SHA doesn't match MD5 wrong hash

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