How to Add a Watermark to a PDF (and When Not To)
Learn how to add a text watermark to a PDF, choose placement and opacity, and when not to watermark signed or formal documents.
How to Add Page Numbers to a PDF
Learn how to add page numbers to a PDF with a clear position and format, a worked example, and checks for the first and last pages.
How to Edit a PDF Without Converting It First
Learn how to make small text, image, and page edits directly in a PDF, plus why fonts may differ and why scanned PDFs need OCR first.
How to Sign a PDF Online (and What Counts as a Real Signature)
Learn the difference between a drawn signature and a certificate-based digital signature, with a safe signing workflow and a worked example.
How to Extract Text From an Image (OCR) Without Retyping It
Learn how OCR turns a photo or scan into editable text, with a worked example, accuracy checks, and limits for handwriting and sensitive documents.
How to Convert Base64 Back to an Image
Learn how to convert Base64 back to an image, read a data URI, decode a 1 by 1 PNG example, check the output, and keep the original file.
How to Flip an Image Vertically Without Losing Quality
Flip an image vertically without losing quality. Learn the one-flip workflow, a worked example, why text flips too, and how to check orientation.
How to Convert PNG to SVG (and When Not To)
Convert PNG to SVG only for simple shapes. Learn tracing, a worked logo example, when photos fail, and why to keep the original PNG.
How to Generate a Favicon From Any Image
Generate a favicon from any image with a square 512×512 source, ICO and PNG files, a worked example, and cache-clearing checks.
How to Turn a Screenshot Into Code (and When It Actually Works)
Learn how to turn a screenshot into HTML and CSS with a layout-first workflow, a worked example, careful AI review, and testing that catches common mistakes.