Get document work done faster
Short, practical guides for PDFs, photos and paperwork — with the tools to do it right away.
How to add a watermark to a PDF (DRAFT, CONFIDENTIAL or your name)
Stamp a diagonal text watermark on every page of a PDF before sharing it, and learn when a watermark is enough and when you need a verification stamp.
How to extract pages from a PDF (or remove the ones you do not need)
Pull a few pages out of a long PDF, or delete blank and unwanted pages, in under a minute. Includes how page ranges like 1-3, 5, 8- work.
How to resize an image without losing quality
Make images smaller in pixels without making them blurry or stretched. Learn when resizing helps, when it hurts, and how to combine it with compression.
JPG vs PNG vs WebP: which image format should you use?
A plain-English guide to choosing between JPG, PNG and WebP for photos, screenshots, logos and websites — and how to convert between them.
A simple PDF and image API for developers: merge, compress and stamp from code
Add PDF merging, page numbers, watermarks, image compression and verification stamps to your app with one HTTP request. Examples in curl, JavaScript and Python.
Automate repetitive PDF tasks with workflows (no code needed)
Stop running the same three tools one after another. Chain merge, page numbers, watermark and more into a single click, or call the same workflow from the API.
How to compress a photo under 200 KB (or any size) for online forms
Application portals often reject photos over 200 KB or 1 MB. Here is how to shrink a photo below an exact file size while keeping it sharp, in under a minute.
How to merge PDF files online without leaving copies behind
Combine several PDFs into one in the right order, and understand what happens to your files when you use an online PDF merger.
How to prove a PDF has not been changed: verification stamps explained
Certificates, invoices and signed letters get edited and forwarded. Learn how a QR verification stamp lets anyone check that a PDF is exactly the one you issued.
How to turn JPG photos and scans into one PDF
Combine phone photos, screenshots or scanned pages into a single PDF in the order you choose, ready to email or upload.