Every time I need to format JSON, decode a JWT, or convert YAML, I end up on a random website that probably sends my data to some server. So I built ReformatIt — a collection of 37 developer tools that run 100% client-side. No data ever leaves your browser.
Full transparency: this started as a personal tool for my own workflow. I'm a C++ developer, not a web dev — I built this almost entirely with an AI coding assistant (Claude). I wanted a tool that I'd actually trust with my data, and I was curious how far AI-assisted development could take someone outside their comfort zone. The result surprised me, so I'm putting it out there.
The site is still in early testing. I'm looking for honest feedback before going any further.
What's inside
37 tools across 8 categories — formatting, encoding, converting, generating, security, and more. The highlights:
JSON/XML/HTML/SQL formatters — the basics, but done right
Base64, URL encode, JWT decode, hash generators — the daily drivers
Password generator, RSA keygen, Bcrypt — security stuff
cURL → Code, Chmod Calculator, Regex Tester — the niche ones I always need
The part I'm most proud of: Visual Pipeline Editor
You can chain transformations by connecting nodes visually. Instead of building N×N dedicated converters, I built an Intermediate Representation system — each format just knows how to parse and serialize to a common JS object. All 25 combinations (JSON/YAML/XML/CSV/TOML) work automatically.
Drag, connect, see results in real-time.
Stack
Next.js 16, TypeScript, Tailwind v4, shadcn/ui, React Flow. 142 tests. i18n (EN/FR). PWA-ready.
What I'm looking for
Bugs (there are some, I'm sure)
Missing tools you'd actually use
UX issues — stuff that feels off
Honest opinions — is this useful or just another tool graveyard?
This is a side project, not a startup pitch. If it's useful to people beyond me, cool. If not, at least I learned a lot building it.
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