Welcome to my site,
I'm Ishina!
Featured
Projects
ishina.dev
Portfolio site and tool platform built with Next.js and TypeScript.
homelab-notes
Deployment notes, network docs, and self-hosting experiments.
dev-toolkit
A collection of lightweight browser utilities for daily engineering tasks.
Utilities
Developer Tools
API Client
Load OpenAPI docs, browse with multi-tabs, and call endpoints with optional local proxy routing.
JWT
Decode and encode JWT tokens without leaving the browser.
JSON
Edit, validate, diff, inspect, and transform JSON in a workspace UI.
Mortgage Calculator
Interactive mortgage calculator with live updates, charts, and amortization breakdowns.
UUID
Generate and validate UUIDs across multiple versions.
Encode / Decode
Encode and decode Base64, URL, HTML, Hex, and Unicode formats.
Cron
Build, validate, and preview cron schedules with timezone-aware run times.
Time
Convert, inspect, and compare timestamps across formats and timezones.
Writing
Technical Blog
Read posts about architecture decisions, tools I'm building, and lessons learned shipping real products.
Read the BlogLatest
Technical writing and build notes
Architecture, tools, and shipping decisions from real projects.
Sandbox