About ToolPal
Last updated: April 17, 2026
Daniel Park
Founder & Senior Frontend Engineer Β· Seoul, Korea
I'm Daniel Park, a senior frontend engineer based in Seoul. I've been building web applications professionally since 2017 β the last seven years split between Korean SaaS startups and a mid-size fintech platform, where I led the internal tools team that built the dashboards and developer portals used by around 40 engineers daily. Outside of my day job I contribute to a handful of small open-source utilities in the JavaScript ecosystem and write about web performance whenever I have something useful to share.
ToolPal started in 2024 out of a personal annoyance. Every time I needed to format a chunk of JSON, decode a JWT to see what claim was missing, or compress a 4MB screenshot for a bug report, I'd end up on some ad-heavy site with a tracking pixel in the header and a vaguely worded privacy policy at the bottom. I started keeping a private collection of snippets that did these things locally in my browser, and at some point it seemed obvious to just host them properly. No uploads, no accounts, no telemetry β the tools run on Web APIs that have been in every modern browser for a decade. I build the tools myself, edit every blog post that goes out, and review reader-reported issues weekly. If something doesn't work the way I'd want it to work on a Tuesday morning, it doesn't go live.
Our Promise
Privacy by default
Every tool runs entirely in your browser using standard Web APIs. We can't see your data even if we wanted to β there is literally no backend to receive it.
Free forever, ad-supported
The site is funded by display ads. You will never hit a paywall, a usage limit, or a 'premium features' upsell. If a tool exists, it works, fully, for free.
Built for real work
Tools are designed around actual developer workflows. That means keyboard shortcuts, dark mode, sensible defaults, and the ability to handle real-world data sizes without freezing your browser.
Honest, tested content
Guides and tutorials are written or reviewed by me personally. Where I describe a workflow, I have used it. Where I recommend a library or pattern, I have shipped it. AI tools help me draft faster, but every published article is edited, fact-checked, and signed off by a human.
Editorial standards
- 1Every tool is built and tested by the ToolPal team before being added to the site.
- 2Blog posts are either written from scratch by a human or drafted with AI assistance and then edited for accuracy, tone, and first-hand experience.
- 3We link to primary sources (MDN, W3C specs, RFCs, official docs) instead of other AI-generated content.
- 4When we recommend a tool, library, or approach, it is one we have personally used in production.
- 5Outdated information is either updated or removed. We do not republish old posts with a new date to fake freshness.
- 6Any factual errors reported via the contact page are corrected within 72 hours.
Get in touch
Found a bug, spotted an error, or have an idea for a new tool? I read every message personally.
Contact