Give proposals, catalogs, portfolios and reports a recognizable first impression. COVVEX lets you personalize a PDF thumbnail with text, colors or your own image, then download the file to share. PDFs and images are processed locally in your browser. The standard mode adds no cover page, and compatible readers display the original document when opened. Preview behavior varies by app and device; WhatsApp Web mode also shows the artwork at the top of the opened PDF. Start with the free editor. Optional Premium tools add fonts, logos, textures and text effects. When sharing on WhatsApp, attach the PDF as a Document.