PDF guides
Step-by-step answers to everyday PDF questions, with the tools that do the job in your browser.
How to compress a PDF for an online form or upload portal
A form or portal rejected your PDF as too large? Find the limit that applies, compress the file in your browser and check it is still readable.
How to redact a PDF properly: why black boxes and white text don't work
Black boxes, white text and highlighter don't remove anything from a PDF. How true redaction works, what is detected automatically and how to check it.
How to prepare your CV or résumé PDF for job applications
Prepare your CV or résumé PDF for job applications: export it properly, keep the text readable for applicant tracking systems and strip hidden metadata.
Compress a scanned PDF without losing readability
Shrink a scanned PDF from a scanner or phone without making it unreadable: pick a level or target size, keep the OCR text layer and fix scan settings.
Merge PDF files on an iPhone or Android phone, no app needed
Combine PDFs or photos of documents into one file from the browser on your iPhone or Android phone, with no app to install and nothing sent to a server.
Visual signature vs electronic or digital signature on a PDF
A signature drawn on a PDF is not a certificate-based digital signature. ESIGN, UETA and eIDAS in general terms, and when a drawn signature is enough.