Developer Tools— Guides & Articles

• Remove Excel Link From PPT Chart: Audit the Workbook

  Published 2026-10-11

  Audit the hyperlinks stored in your Excel workbook before breaking the chart link in PowerPoint. See which cells hold http, https, and mailto targets locally.

  

• How to Make Flexbox in HTML: Build a Container Block

  Published 2026-10-11

  Make flexbox in HTML by configuring five Flexbox properties in a local generator, previewing a five-item layout, and copying a deterministic CSS block.

  

• File Signatures List Cheat Sheet: Match Twelve Magic Bytes

  Published 2026-10-11

  Twelve source-checked magic-byte prefixes paired with their formats and notes. Compare them in a hex viewer, then validate the full file structure.

  

• View Excel Online History Without Uploading

  Published 2026-10-11

  View Excel Online history in a browser preview without uploading. Read stored .xlsx cell values as plain text, with no formula execution and no server copy.

  

• How to Convert Excel to JSON in Python and Locally

  Published 2026-10-11

  Converting Excel to JSON in Python usually means pandas or openpyxl. See the tradeoffs and a local browser export that doesn't upload your workbook.

  

• Convert an XLSX Worksheet to an HTML Table Snippet

  Published 2026-10-11

  Turn one local .xlsx worksheet into an escaped HTML table snippet in your browser. Stored values only, no upload, no formula execution, no formatting preserved.

  

• Excel Formulas Cheat Sheet Example: 12 Verified Formulas

  Published 2026-10-10

  Search twelve verified Excel functions by name, syntax, or task and copy vendor-style argument signatures for daily spreadsheet work.

  

• 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…