About Toolkit

Toolkit is a growing collection of fast, free, privacy-respecting browser utilities built for developers, designers, writers, and everyday users.

Privacy by design

Every tool runs natively in your browser. Inputs never leave your device.

Built for speed

Pre-rendered static pages, optimized bundles, lightning fast on every device.

Always improving

We add new tools every week based on user demand and feedback.

How it works

Each tool is implemented entirely in JavaScript or WebAssembly that runs in your browser. Every page is statically generated, so loading any tool is as fast as opening a document. There are no servers processing your inputs — only your CPU.

This architecture lets us publish new tools every week without spending a cent on infrastructure. The tradeoff is that some heavy binary tools (large PDF or video conversion) cannot run fully in your browser yet — but most everyday tasks fit just fine and stay private.

Tech stack

  • Next.js 14 (App Router)

    React framework with SSG/ISR

  • TypeScript

    End-to-end type safety

  • Tailwind CSS

    Utility-first styling

  • Custom SVG icons

    Hand-crafted, no library

  • Fuse.js

    Fuzzy client-side search

  • Zod

    Schema validation

  • Web Crypto API

    Secure random + hashing

  • pdf-lib

    Client-side PDF tools

Ready to explore?

Browse the full catalog and find the tools you need today.

Browse all tools