· 2 min read
How to redact a PDF properly, and why a black box isn't enough
Drawing a black box over text in a PDF doesn't remove it. Learn how real redaction works, what to check before sharing, and how to redact without uploading.
Blog
Practical guides to merging, compressing and protecting PDFs, and to checking where your files actually go when you use an online tool.
· 2 min read
How to sign a PDF without uploading it
Add your handwritten signature to a PDF in your browser: draw, type or upload it, place it on the page and download. No account, and the file never leaves your device.
· 2 min read
What hidden data is in your PDF, and how to remove it
PDFs can carry your name, the software you used, dates, attachments and scripts you never see on the page. Here's what's hidden and how to strip it before sharing.
· 2 min read
What is PDF/A, and when do you need it?
Courts, archives and government portals often ask for PDF/A. Learn what it is, how 1b, 2b and 3b differ, which one to pick and how to convert a PDF to PDF/A.
· 3 min read
How to reduce PDF file size: lossless vs. image compression
Why some PDFs shrink a lot and others barely change, which compression to choose for text, scans and photos, and how to compress privately in your browser.
· 3 min read
How to check whether a PDF tool uploads your files
Online PDF tools rarely say plainly whether your document leaves your device. Use your browser's developer tools to see for yourself in about two minutes.
· 2 min read
How to merge PDF files without uploading them
Combine PDFs in your browser so contracts, statements and scans never leave your device. Step-by-step guide, what's kept, limits, and how to check.