About AIStacker
AIStacker is a growing collection of small, focused utilities and practical guides. Everything runs locally in your browser — no sign-up, no uploads, and no tracking of the content you work with.
Last updated: 2026-06-22
What we do
We build single-purpose tools — formatters, converters, validators, calculators, and language utilities — that do one job well and load instantly. Alongside them we publish hands-on guides that connect the tools into real workflows.
Why local-first
Many online utilities send whatever you paste to a remote server. We took the opposite approach: the processing happens in your browser, so your input never leaves your device. It is faster, works offline once loaded, and keeps sensitive data — tokens, logs, documents — private.
Who it's for
The site serves a few audiences in particular:
- Developers who need a quick formatter, encoder, or debugging helper without installing anything.
- Japanese content creators and language learners, who we build specialised tools for — manuscript-paper counters, full/half-width converters, verb conjugators, and more.
- Anyone who needs a fast, reliable everyday calculation or conversion.
Our guides
Beyond the tools, we write practical guides on topics like API error triage, URL encoding, JWT debugging, subtitle workflows, and Japanese writing conventions — written to be genuinely useful, not just keyword filler.
Contact
We welcome feedback and suggestions at dooleykara@protonmail.com.