PDF tips, guides & comparisons
Honest, practical articles about working with PDFs for free — and keeping your files private.
Free online PDF tools that never upload your files
Most online PDF tools upload your documents to a server. pdfcdf runs entirely in your browser — merge, split, edit, sign and convert PDFs for free, with no upload and no sign-up.
Read articleA free PDF editor with no sign-up and no limits
Edit PDFs online for free with no account and no daily limit. pdfcdf lets you merge, split, delete pages, add page numbers, watermark, sign and more — all in your browser.
Read articleHow to merge PDF files without losing quality (free)
Combine PDFs into one file with zero quality loss — free, with no upload. pdfcdf merges PDFs in your browser and keeps every page pixel-perfect.
Read articleHow to sign a PDF for free (no printing, no scanning)
Sign a PDF online for free without printing or scanning. Draw or type your signature, place it anywhere on the page, and download — all privately in your browser.
Read articleHow to convert PDF to JPG for free (and back)
Turn PDF pages into high-quality JPG or PNG images for free, or combine images into a PDF. pdfcdf converts both ways in your browser, with no upload.
Read articleAre online PDF tools safe? What to check before uploading
Are online PDF tools safe to use? Learn the privacy risks of uploading documents, and why browser-based tools that process files locally are a safer choice.
Read article