Developer Tools — Guides & Articles

• Get an Excel Column Total From a Local xlsx File

  Published 2026-10-10

  Get an Excel column total by extracting one column from a local .xlsx as a formula-safe CSV. No upload, original file unchanged.

  

• How to Generate a Dummy File With Exact Bytes

  Published 2026-10-10

  Generate a dummy file of exact byte size up to 50 MiB in your browser. Choose zero, random, or repeated-text content, verify the byte count, and download…

  

• How to Get a Directory Tree in Mac Terminal

  Published 2026-10-10

  macOS does not ship with a tree command. Run a quick find in Terminal, paste the paths into Directory Tree Generator, and copy a deterministic Unicode or…

  

• Camel Case to Snake Case: Command Line vs Online Tool

  Published 2026-10-09

  Camel case to snake case command line vs online — sed and awk limits, npm scripts, and a browser converter that handles six naming styles from one paste.

  

• CSV to JSON Command Line vs Online: A Practical Comparison

  Published 2026-10-09

  CSV to JSON command line vs online compared: where Python and jq break on quoted commas, and how a local browser tool preserves every string exactly.

  

• Convert CSV to HTML Table for Power Automate: Safer Steps

  Published 2026-10-09

  Generate escaped HTML table markup from CSV for Power Automate flows with a browser RFC 4180 parser. Copy the fragment, drop it into Compose, and style the…

  

• How to Convert CSV to Excel Without Losing Data

  Published 2026-10-09

  Convert CSV to Excel without losing data. Keep leading zeros, quoted commas, line breaks, and formula-looking text intact. Runs locally in your browser.

  

• CSS Stripes Generator: Command Line vs Online

  Published 2026-10-09

  Compare command-line scripts with the online CSS Stripes Generator. See what the browser tool validates, outputs, and why it beats handwritten gradient code.

  

• CSS Speech Bubble Generator Example: A Full Walkthrough

  Published 2026-10-09

  A CSS speech bubble generator example using four inputs — colors, radius, tail, and side — to preview geometry and copy a class plus pseudo-element.

  

• CSS Loader Generator: Command Line vs Online Workflow

  Published 2026-10-08

  Compare command-line and online CSS Loader Generator approaches for ring spinners. Learn when each fits and how to ship accessible CSS loaders.