Zhang Enquan

Building free online dev tools at aisubtools.xyz. Writing about web dev, URL encoding, and small utilities that save time.

Joined on Sep 2, 2026 https://aisubtools.xyz/

Zhang Enquan

Oct 21

I Shipped a Token Counter That Silently Returned Wrong Numbers: Here Is the Bug and the Diff

#javascript #webdev #ai

4 min read

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Zhang Enquan

Oct 14

I Tokenized 10,000 Real Prompts: The "4 Characters per Token" Rule Is Off by More Than 20% on 4 Out of 10 of Them

#ai #python #webdev #javascript

5 min read

Zhang Enquan

Oct 6

How to Count GPT Tokens Before You Hit the API

#python #javascript #ai #webdev

5 min read

Zhang Enquan

Sep 14

Cloudflare Just Shipped Post-Quantum at Internet Scale. Do You Need to Change Your Tools?

#webdev #postquantum #cloudflare #security

6 min read

Zhang Enquan

Sep 10

Open-sourcing my dev tools as plain HTML files (no npm, no build)

#showdev #webdev #javascript #opensource

2 min read

Zhang Enquan

Sep 6

Why %20 Keeps Appearing in Your URLs: A Practical Guide to URL Encoding

#webdev #tutorial #javascript #beginners

4 min read

Zhang Enquan

Sep 2

I Built 35+ Browser-Side Tools Because I Was Tired of Uploading My Data to Random Servers

#showdev #webdev #productivity #opensource

2 min read

DEV Community

Zhang Enquan

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2 Week Community Wellness Streak

1 Week Community Wellness Streak

Writing Debut

I Shipped a Token Counter That Silently Returned Wrong Numbers: Here Is the Bug and the Diff

Want to connect with Zhang Enquan?

I Tokenized 10,000 Real Prompts: The "4 Characters per Token" Rule Is Off by More Than 20% on 4 Out of 10 of Them

How to Count GPT Tokens Before You Hit the API

Cloudflare Just Shipped Post-Quantum at Internet Scale. Do You Need to Change Your Tools?

Open-sourcing my dev tools as plain HTML files (no npm, no build)

Why %20 Keeps Appearing in Your URLs: A Practical Guide to URL Encoding

I Built 35+ Browser-Side Tools Because I Was Tired of Uploading My Data to Random Servers