Guides

Notes on how the tools work, written so the method is visible.

• How to resize an image without uploading itChange the pixel size of a JPG, PNG or WebP image in the browser, and know what that does to quality.
• How PDF compression works in the browserWhy some PDF compressors keep selectable text and others shrink the file by redrawing the pages.
• How steel weight is calculatedThe 7850 kg/m³ density behind reinforcement weight tables, with a worked round-bar example.
• How to estimate rebar for a simple memberBar counts from spacing and cover, tie cut length, and what this kind of estimate leaves out.
• How to make a QR code that scansWhat to put in a QR code, how error correction changes capacity, and how to export it.
• What “processed in your browser” meansWhich RS Labs tools touch a server, what stays on the device, and what the page can still see.