100% offline · no account

The developer toolbox
that never phones home.

50+ everyday utilities — JSON, JWT, hashing, converters, generators and more — in one fast desktop app. Everything runs locally, so your tokens and payloads stay yours.

Download for freeView source

macOS · Windows · Linux — free for personal use

JSON formatter
1{
2  "name": "hexkit",
3  "offline": true,
4  "tools": 50,
5  "tracking": null
6}

// why hexkit

Built for focused, private work.

Everything stays on your machine

No network calls, no telemetry, no accounts. Paste a JWT or an API key and it never leaves your laptop — the whole toolbox works on a plane.

Open anything, instantly

A command palette puts every tool one keystroke away. Smart detection guesses the right tool from whatever you paste.

Syntax highlighting everywhere

JSON, XML, SQL, code — output is highlighted, foldable, and easy to scan, in both light and dark themes.

Work in tabs

Open the same tool twice, keep separate scratchpads, and pick up exactly where you left off — tab state survives a restart.

Native & fast

Built on a Rust core and a system WebView. Tiny memory footprint, instant cold start, signed builds for macOS, Windows and Linux.

// the toolbox

50+ tools, one window.

Smart detection picks the right one as you paste.

JSON & data

Encode & decode

Convert

Generate

Inspect & preview

Cryptography

Text

// pricing

Free for personal use.

Commercial use and advanced workflows will be part of a future Pro license. The core toolbox stays free for individuals.

Personal

Free

For your own machine and hobby projects, forever.

  • All 50+ tools
  • Offline, no account
  • Light & dark themes
  • Command palette & smart detection
Download

Pro

Coming soon

For commercial use and power-user workflows.

  • Everything in Personal
  • Commercial-use license
  • Multi-tab workspaces
  • Raycast extension
  • Priority updates
Notify me

Keep your tools close and your data closer.

Grab a signed build for your platform, or build it yourself from source. No sign-up required.

Download latest releaseBuild from source

Tip: press the command palette key to open any tool instantly.

// command line

A `hexkit` you can pipe into.

The same tools that run in the app are exposed as a single CLI binary, so you can script JSON pretty-prints, generate hashes from a Makefile, or wire the Raycast extension to it.

Download hexkit-cli archive
1

Install from inside the app

Open Hexkit → the menu offers Install Command Line Tools…, and a banner prompts on first launch. The app ships the CLI alongside it, so no extra download is needed.

2

Or install with cargo

Builds and installs to ~/.cargo/bin/hexkit.

cargo install --git https://github.com/trinvh/hexkit hexkit-cli
3

Or grab the standalone archive

Each GitHub release attaches a hexkit-cli-<platform>.tar.gz (Linux/macOS) or .zip (Windows) with SHA-256 checksums.

tar -xzf hexkit-cli-*.tar.gz && mv hexkit /usr/local/bin/