README

DevTools

A desktop workspace with 62 developer utilities for macOS, Windows, and Linux. Format JSON, inspect tokens and certificates, convert data, generate code, and prepare text and images for AI workflows with local processing.

!DevTools — everyday developer tools in one free, offline app for macOS, Windows, and Linux. Your data never leaves your computer.

Download · Tools · Workspace and shortcuts · Development · Support

 

!DevTools in light mode with JSON Viewer, formatted output, and multiple open tool tabs


See dark mode

!DevTools in dark mode with the JSON Viewer workspace



Screenshots show the current web UI in browser preview. The installed desktop app adds native window integration, tray access, global shortcuts, deep links, and automatic updates.

The utilities work offline without an account or an AI API key. DevTools includes no analytics or telemetry. The AI tools process your content locally; they do not call an AI service. App updates use the network.

 Download

Get the latest release for your platform:

- macOS (Intel)
- macOS (Apple Silicon)
- Windows
- Linux — .deb (Debian, Ubuntu, Mint) (x64)
- Linux — .deb (Debian, Ubuntu, Mint) (arm64)
- Linux — .rpm (Fedora, RHEL, openSUSE) (x64)
- Linux — .rpm (Fedora, RHEL, openSUSE) (arm64)
- Linux — .AppImage (x64)
- Linux — .AppImage (arm64)

 Automatic updates

DevTools checks for updates on startup and every six hours, downloads new versions in the background, and installs them when you quit. Use Restart now to install a downloaded update immediately, or turn off Update automatically in the sidebar to manage updates yourself. Update checks and downloads require an internet connection.

 Upgrading from v1.3.0 or earlier

Version 1.3.0 and earlier used Electron. Later versions use Tauri. The Electron version updates to the Tauri version through its usual update button.

- On macOS, the app closes after the update. Open DevTools again to start the new version.
- On Windows, the new installer removes the Electron version.
- On Linux, the new .deb and .rpm packages replace the old devtools package. An AppImage is replaced in place.

Your favorites, recent tools, theme, and custom shortcuts do not move to the new version. Set them again after the update.

 Workspace and shortcuts

- Keep tools open in tabs. Switch between tools without losing their current inputs. Close a tab when you are finished.
- Search by name or keyword. Open the command palette with Cmd+K on macOS or Ctrl+K on Windows and Linux. Search for terms such as sha, yml, or diff.
- Favorites and recents. Pin up to five tools and return to recently used tools from Home. Cmd/Ctrl+1 through 5 opens your favorites. Customize these bindings in Shortcuts.
- Light and dark appearance. DevTools follows the system theme initially; use the appearance button to switch between light and dark.

- Paste to find a tool. Paste text outside a text field, and DevTools suggests the tool that fits: a JWT, JSON, a URL, a UUID, a time

Latest release

DevTools v2.11.0

 Highlights

- New PDF Tools: merge PDFs, split or extract pages, reorder, rotate, and delete pages, turn images into a PDF, and save pages as images. Your files stay on this device.
- New Email Header Analyzer: paste the headers of a message to see each server it passed through, the delay at each hop, and the SPF, DKIM, and DMARC results.
- SVG to CSS now shrinks your SVG with SVGO before it makes the data URI.

 New Tools

- PDF Tools shows every page of the new document in order. Drag pages or use the arrow buttons to reorder them, and rotate or delete pages. Select pages