Developer tools

The dev category holds seven tools. All run in the browser; tool pages live under /tools/dev/.

JS Playground

Path: /tools/dev/editor

A JavaScript editor with a console. Code runs in a sandbox.

Run with Ctrl+Enter; Stop ends the running code and throws its sandbox away.
Format lays the code out: indentation and line breaks only, nothing rewritten.
Copy the code, or empty the editor (Ctrl+Z brings it back).
A console panel shows output, which you can copy or clear.

HTML Viewer

Path: /tools/dev/html-viewer

Edit an HTML document and see a live preview. Scripts run in a sandboxed preview.

Run (Ctrl+Enter) shows the page with its scripts running.
Choose when the preview updates: markup live with scripts on Run, everything live, or only when you press Run.
Format the document with Prettier; Check reviews the structure and accessibility of the document.
Preview as a visitor whose browser is set to dark, widen the preview over the editor, and show the preview console.
Copy the editor contents, download the document as page.html, or reset to the starting example.

Crontab

Path: /tools/dev/crontab

Edits a cron expression and explains it.

Shows what the expression means and its next ten run times, with presets.
Copy the expression or the next runs; paste an expression from the clipboard; reset to the example.
A syntax table covers *, single values, lists, ranges, steps (*/15, 5/15), month and weekday names, 0 and 7 for Sunday, and shorthands such as @daily and @reboot.
Quartz extensions (L, W, #) are rejected, because crontab(5) rejects them too. Ranges do not wrap (22-4 is an error).
The page notes that cron runs in the server’s timezone, not yours.

Deploy Manifest

Path: /tools/dev/deploy-manifest

A form for building a deployment manifest, with a Markdown view for review.

Choose an environment, start from a template, save the current manifest as a template, or empty the form.
Import and export the manifest as JSON.
Copy the manifest as Markdown, download it in a chosen format, or print it.
A review panel shows a count of items for attention.
The manifest is autosaved in the browser; export the JSON to move it between machines.

Date Tools

Path: /tools/dev/date-tools

Date converter for Gregorian and Hijri dates and for Unix timestamps.

Gregorian to Hijri, comparing the arithmetic Hijri Civil calendar with the Umm al-Qura calendar.
Hijri to Gregorian, with a choice of Hijri calendar. The same Hijri numbers can map to different Gregorian dates.
Date to timestamp and timestamp to date, interpreting the input as local time, UTC or Riyadh (UTC+3). Timestamps can be in seconds or milliseconds.
Output includes ISO 8601, Unix seconds, Unix milliseconds, UTC, local and Riyadh time. A Use now button fills every converter with the current moment.
Calendar calculations use the browser’s internationalisation data; the page notes that observational dates can differ by authority.

AI Workbench

Path: /tools/dev/ai-tools

A prompt library and composer for preparing prompts you copy elsewhere.

Search and filter a library of templates by category.
A composer with two parts: how the AI should behave (the system prompt) and what you want done. Replace each {{placeholder}} using the template variables.
Copy both parts, or either part alone; clear to start a blank prompt.
The draft saves automatically in the browser.

This tool belongs to the ai feature module and can be left out of a build.

JAR Decompiler

Path: /tools/dev/jar-decompiler

Opens a .jar, .war or .zip and shows its classes as Java source, decompiled with CFR. Dropping a file anywhere on the page also opens it. The page reminds you to decompile only code you have the right to inspect.

Browse the archive contents, with filters for entries and classes, and options to show or hide inner and anonymous classes and other files.
Copy or save the source on screen.
Save all decompiled sources as a zip.