Build faster.
Ship better.
A comprehensive collection of production-grade developer tools, generators, and utilities for the modern engineer.
# Install the first tool: Koppie
$ npm install -g koppie
# Send content instantly
$ koppie send "hello world"
✓ Uploaded
Code: 4829
# Retrieve anywhere
$ koppie 4829
✓ Retrieved
hello world
Universal Toolbox.
A growing collection of essential utilities designed for developers who value speed, simplicity, and performance.
Koppie
Cross-device clipboard sharing CLI using short numeric codes. Copy on your laptop, paste on your server instantly.
JSON Formatter
Validate, format, and visualize complex JSON structures with high-performance processing and intuitive tree views.
Regex Lab
Test and debug regular expressions in real-time with detailed explanation and visual breakdown of matches.
Base64 Converter
Encode and decode text or files to Base64 format with support for various character encodings and large files.
JWT Decoder
Securely decode and inspect JSON Web Tokens locally. No data ever leaves your browser.
HTTP Inspector
Mock and inspect HTTP requests, test endpoints, and generate client code in multiple languages.
Open Source
Everything we build is open source. Audit the code, contribute features, or host it yourself. Transparency is our core value.
Privacy First
Your data stays with you. Most tools run entirely in the browser, and server-side tools use end-to-end encryption or transient storage.
Developer Centric
Built by developers, for developers. Clean interfaces, keyboard shortcuts, and CLI-first integrations.
Ready to level up your workflow?
Join thousands of developers using freecodetools.dev every day to build the future.