ToolKit

About ToolKit

ToolKit is a collection of browser-based utilities for developers and designers, covering categories such as security, code and development, network and web, data and format, text and writing, design and media, value conversion, AI, and QA and testing. It lists 73 tools live and 42 more planned, including a password generator, word counter, Base64 encoder/decoder, JSON formatter, random text generator, cron expression generator, AI token counter and visualizer, and keyboard layout converter. Tools run in the browser without an account, with the site stating no signup, no tracking, and no data stored or sent to a server.

The site also publishes guides and blog posts related to its tool categories, with topics including AI agent system prompts, API testing assertions, color palette generation, CSS selectors, data storage units, and JWT generation and signing. It lists 60 guides in total.

ToolKit is built with Next.js and deployed on Vercel.

Key features

• 73+ browser-based developer and designer tools across categories like Security, Code & Dev, Data & Format, and AI
• Tools run entirely client-side with no signup, tracking, or server calls
• Includes password generator, JSON formatter, Base64 encoder/decoder, and word counter
• AI Token Counter with exact GPT tokenization and per-token visualization
• Cron Expression Generator to build and validate cron job schedules
• 60+ practical guides on topics like AI system prompts, API testing, and JWTs

Frequently asked questions