Devtools Workbench

17 developer tools in one place. Every tool runs in your browser; nothing you type is uploaded.

• Base64

  Encode and decode Base64 text fully in the browser. UTF-8 safe, no upload.

  /base64

• Color Palettes

  Browse preset palettes and export as CSS, Tailwind, or JSON.

  /color-palettes

• Color Picker

  Pick a color and convert between HEX, RGB, and HSL.

  /colorpicker

• Cron Helper

  Build and explain standard 5-field cron expressions and preview next run times.

  /cron

• Date Calculator

  Compute date differences and add or subtract days, weeks, or months.

  /date-calculator

• Diff Checker

  Compare two texts line-by-line and highlight additions and removals.

  /diffchecker

• Hash Generator

  Generate SHA fingerprints locally with the Web Crypto API.

  /hashgen

• JSON Converter

  Format JSON and move simple data between JSON and YAML in the browser.

  /jsonconverter

• Markdown Editor

  Split-pane Markdown editor with a lightweight live preview.

  /markdown-editor

• Code Minifier

  Lightweight JS / CSS / HTML / JSON minifier that runs entirely client-side.

  /minifier

• Number Base Converter

  Convert integers between binary, octal, decimal, and hexadecimal.

  /number-converter

• Regex Tester

  A live JavaScript regular expression proof desk.

  /regex

• URL Encoder

  Encode and decode URL components in the browser.

  /url-encoder

• Engineering Calculator

  An illustrative field instrument for beam-load checks.

  /engineering-calc

• Latency Test

  Ping a URL from the browser.

  /latency-test

• Clipboard Manager

  Local-only clipboard history snippets stored in localStorage.

  /clipboard-manager

• Snippets

  A small local code specimen library: filter, read and copy reusable snippets.

  /snippets