Developer Tools — Guides & Articles

• How to Split Excel Sheets Side by Side Into Files

  Published 2026-08-14

  Turn every worksheet in a local .xlsx workbook into a separate data-only .xlsx file, packaged in one ZIP. No upload, no formulas, no formatting preserved.

  

• How to Check a Regex Pattern in JavaScript

  Published 2026-08-14

  Check a regex against sample text live in your browser. Type a pattern, toggle flags, and watch matches, capture groups, and named groups appear.

  

• Common Regex Patterns in JavaScript: A Token Reference

  Published 2026-08-14

  Find JavaScript RegExp tokens by symbol, meaning, or category, then copy the exact token. A curated 44-entry ECMAScript regex reference.

  

• How to Parse URL Query Strings Into JSON

  Published 2026-08-14

  Parse URL query strings into flat JSON objects locally, or rebuild encoded query strings from JSON, with handling for duplicates and percent escapes.

  

• How to Convert Px to Rem in Figma Designs

  Published 2026-08-14

  Convert pixel values from a Figma design into rem CSS units with the correct root font size. Formula walkthrough and approximation handling.

  

• Find the Right PowerPoint Shortcut on Windows or Mac

  Published 2026-08-14

  PowerPoint shortcuts differ between Windows and Mac. Use the PowerPoint Keyboard Shortcuts tool to search 20 verified Microsoft actions by platform,…

  

• How to Export Photoshop Keyboard Shortcuts by Platform

  Published 2026-08-14

  Export Photoshop keyboard shortcuts without mixing platforms. Search 16 default actions, keep Windows and macOS separate, and copy exact keys locally.

  

• Generate Nano IDs Locally With Web Crypto Randomness

  Published 2026-08-14

  Generate URL-friendly Nano IDs in your browser using Web Crypto randomness, rejection sampling, and the official 64-symbol alphabet.

  

• File Extension to MIME Type: How to Get It Right

  Published 2026-08-14

  Need a file extension to MIME type mapping for HTTP headers, uploads, or configs? Use a verified 24-entry reference to copy the exact IANA-registered value.

  

• How to get rid of a gradient mesh with CSS radial layers

  Published 2026-08-14

  Swap gradient mesh artwork for four layered CSS radial gradients over a base color. Tune fade spread, copy exact CSS, and ship a lighter background.