kingfujing

Creator of DevToolsHub — free, privacy-first online developer tools. Writing about JSON, regex, JWT, and web dev.

Beijing,China Joined on Jun 19, 2026 https://devtoolshub-seven.vercel.app

Pinned

kingfujing

Jun 19

10 Free Online Developer Tools to Supercharge Your Workflow in 2026

#webdev #productivity #tools #beginners

3 min read

kingfujing

Nov 12

SQL Query Cheat Sheet: Essential Queries and Patterns

#webdev #sql #database #tutorial

11 min read

Want to connect with kingfujing?

Create an account to connect with kingfujing. You can also sign in below to proceed if you already have an account.

Create Account

Already have an account? Sign in

kingfujing

Nov 12

JavaScript Array Methods Cheat Sheet: Every Method with Examples

#webdev #javascript #tutorial #beginners

7 min read

kingfujing

Nov 12

HTTP Status Codes Cheat Sheet: Every Code Explained

#webdev #api #tutorial #beginners

8 min read

kingfujing

Nov 12

HTML Entities Reference: Every Escape Code You Need

#webdev #html #tutorial #beginners

6 min read

kingfujing

Nov 12

Cron Expression Guide: Complete Reference with Examples

#webdev #devops #tutorial #productivity

8 min read

kingfujing

Nov 12

CSS Units Cheat Sheet: px, em, rem, vh, and When to Use Each

#webdev #css #tutorial #beginners

9 min read

kingfujing

Nov 12

Git Commands Cheat Sheet: The Commands You Actually Use Daily

#webdev #git #tutorial #beginners

9 min read

kingfujing

Sep 4

REST vs GraphQL: Which API Style Should You Use in 2026?

#webdev #api #graphql #tutorial

6 min read

kingfujing

Aug 25

JWT vs OAuth2: What's the Difference and When to Use Each?

#webdev #javascript #security #tutorial

5 min read

kingfujing

Aug 25

SQL vs NoSQL: Which Database Should You Choose in 2026?

#webdev #database #tutorial #beginners

5 min read

kingfujing

Aug 25

JSON vs YAML: Which Data Format Should You Use?

#webdev #javascript #tutorial #productivity

4 min read

kingfujing

Aug 25

JWT vs Session: Which Authentication Method Should You Use?

#webdev #javascript #tutorial #security

5 min read

kingfujing

Jul 13

URL Encoding Decoded: A Developer's Guide to encodeURI vs encodeURIComponent

#webdev #javascript #tutorial #beginners

4 min read

kingfujing

Jul 8

5 Developer Tools That Respect Your Privacy

#webdev #privacy #tools #productivity

3 min read

kingfujing

Jul 5

Unix Timestamp Cheat Sheet: Convert, Read, and Debug Like a Pro

#webdev #javascript #tutorial #beginners

4 min read

kingfujing

Jul 5

UUID v4 vs UUID v7: Which One Should You Use?

#webdev #javascript #tutorial #database

4 min read

kingfujing

Jul 2

How to Decode JWT Tokens Without a Backend

#webdev #javascript #tutorial #security

3 min read

kingfujing

Jun 20

The Complete Guide to Writing Better Regular Expressions

#webdev #javascript #tutorial #beginners

3 min read

kingfujing

Jun 20

Base64 Encoding & Decoding: What Every Developer Needs to Know

#webdev #javascript #tutorial #security

4 min read

kingfujing

Jun 19

JSON Formatting 101: How to Format, Validate, and Debug JSON

#webdev #javascript #tutorial #productivity

3 min read

DEV Community

kingfujing

Badges

1 Week Community Wellness Streak

Writing Debut

Pinned

10 Free Online Developer Tools to Supercharge Your Workflow in 2026

SQL Query Cheat Sheet: Essential Queries and Patterns

Want to connect with kingfujing?

JavaScript Array Methods Cheat Sheet: Every Method with Examples

HTTP Status Codes Cheat Sheet: Every Code Explained

HTML Entities Reference: Every Escape Code You Need

Cron Expression Guide: Complete Reference with Examples

CSS Units Cheat Sheet: px, em, rem, vh, and When to Use Each

Git Commands Cheat Sheet: The Commands You Actually Use Daily

REST vs GraphQL: Which API Style Should You Use in 2026?

JWT vs OAuth2: What's the Difference and When to Use Each?

SQL vs NoSQL: Which Database Should You Choose in 2026?

JSON vs YAML: Which Data Format Should You Use?

JWT vs Session: Which Authentication Method Should You Use?

URL Encoding Decoded: A Developer's Guide to encodeURI vs encodeURIComponent

5 Developer Tools That Respect Your Privacy

Unix Timestamp Cheat Sheet: Convert, Read, and Debug Like a Pro

UUID v4 vs UUID v7: Which One Should You Use?

How to Decode JWT Tokens Without a Backend

The Complete Guide to Writing Better Regular Expressions

Base64 Encoding & Decoding: What Every Developer Needs to Know

JSON Formatting 101: How to Format, Validate, and Debug JSON