One app for your daily dev tasks

DevKnife replaces browser tabs, CLI scripts, and scattered tools with one native Mac app.

Free 30-day trial. No sign-up or credit card needed.

Secure, fast, and offline

DevKnife is a native macOS app designed to work offline, ensuring your data stays private while providing seamless access to essential developer tools.

Everything you need. Right in your dock.

DevKnife brings a suite of essential tools directly to your dock, streamlining your workflow with native macOS performance.

JSON Editor & Formatter

Easily format, validate, and edit JSON data with a user-friendly interface that ensures readability and correctness.

Converter

Convert data between JSON, YAML, TOML, XML, and CSV formats with instant and accurate transformations, all processed locally on your Mac.

Text Compare

Compare two blocks of text and instantly spot the differences. Highlight changes in a clear, side-by-side view.

JWT Decoder

Instantly decode JSON Web Tokens and view their header, payload, and signature in a clean, readable format.

Port Scanner

Scan ports to test connectivity, verify services, or check firewall settings.

Explore all tools

Loved by fellow devs

Real feedback from developers who’ve added DevKnife to their toolkit.

Sujee

@sujee

I have been using @devknifeapp for a week now. It is a great addition to my dev workflow. I like color picker, compare text and data generator tools. Best part is, it works locally.

Jul

@_julbd

Quick and useful dev helpers. Already on the free trial but I’m will buy the lifetime package—love how it solves real dev needs fast. Gave my feedback and would love to chat more.

Venelin K.

@venelinkochev

This @devknifeapp is such a great tool. The JSON Editor and Text Compare are my favorites. I've been looking for a simple text compare tool for Mac for a long time, other features are just a great bonus. Adding this to my workflow!

Darrell Brogdon

@wonkavatormusic

I've been using @devknifeapp for a few days and it's amazing! This is the kind of craftsmanship I wish more products had.

Why developers choose DevKnife

Built for devs who want speed, simplicity, and control.

Native & Fast

Built for macOS with true native performance. No Electron, no lag. Just smooth tools that open instantly and feel at home on your Mac.

Privacy

Works completely offline and collects nothing. No telemetry, no analytics, no background connections. Your data stays yours.

One-time payment

Pay once and own it forever. No subscriptions, no hidden fees, no monthly surprises.

Lightweight

Small install size and low memory use. Runs fast without draining your Mac’s resources.

Download for macOS

Made for Apple Silicon · macOS 14 · Just 10 MB

Stay in the Loop

Be the first to hear about DevKnife and other tools from Solo Tuna.
No spam — just occasional updates, new releases, and early access invites.