ToolHaven
- Role
- Creator & Full Stack Engineer
- Goal
- Ship a privacy-first alternative to upload-based online utilities — a full workshop of tools that never see your files.
- Outcome
- 500+ client-side tools live, with sub-50ms interactions and full offline support.
Problem
Everyday utilities — compressing an image, merging a PDF, decoding a JWT — usually mean uploading files to someone else's server. That is slow, ad-riddled, and a real privacy risk when the file is a contract, a medical record, or a private key. The web platform can do all of this locally; almost nobody builds it that way.
- 01
Client-side everything
Every tool runs on the visitor's machine using native Web APIs — canvas and WASM-backed processing for images and PDFs, pure TypeScript for encoders, parsers, and calculators. There is no upload endpoint at all: files physically cannot leave the browser.
- 02
An architecture that scales to 500+ tools
A catalogue this size lives or dies on consistency. Each tool is an independent module built on a shared component kit and layout system, with unified search and navigation on top — so adding a tool is additive work, never a redesign.
- 03
Performance and offline as features
Because processing is local, speed is the product. Interactions stay under 50ms, and the app keeps working offline after first load — which also makes the privacy promise verifiable: cut the network and every tool still works.
- 500+ tools across image, PDF, text, developer, finance, and design categories.
- Zero server round-trips for file processing — no uploads, no accounts, no ads.
- Sub-50ms interactions and full offline support after first load.
- Next.js
- React
- TypeScript
- Tailwind CSS
- Web APIs
- Client-side processing