The PDFSomething blog
Longer reads on how PDFs actually work: the format's quirks, the traps that catch people out, and practical ways to get better results. No fluff, and every article links to the free tools you can use to act on it.
A black box on a page hides text from your eyes, not from a computer. What real redaction is, why fake redaction leaks secrets, and how to do it properly.
2026-09-22 · 7 min read
What your PDF’s metadata quietly reveals about youNames, software details and dates can travel inside a PDF. What metadata reveals, which fields this tool clears, and what it cannot sanitize.
2026-09-22 · 6 min read
What “flatten a PDF” means, and when you need itFlattening turns editable form fields and stamps into part of the page itself. What that fixes, what you give up, and when it's the right move.
2026-09-22 · 5 min read
Why a “compressed” PDF sometimes gets biggerCompression isn't magic. Here's what really drives PDF size, and why squeezing an already-lean file can make it larger.
2026-09-19 · 6 min read
Is it safe to upload tax and ID documents to online PDF tools?A passport scan is not a holiday photo. What actually happens when you upload sensitive documents, and how to tell a safe tool from a risky one.
2026-09-19 · 7 min read
PDF/A vs PDF: which to use for long-term archivingThe PDF you save today might not render faithfully in 2050. What PDF/A locks down, and when the stricter format is worth it.
2026-09-19 · 6 min read
Scanned vs digital PDFs: why your text isn’t selectableWhy some PDFs let you copy text and others give you a picture of it, and how OCR turns one into the other.
2026-09-19 · 6 min read
How to get a PDF under an email attachment limitThe attachment bounced. A practical playbook for getting a PDF under 25 MB, 10 MB, or whatever wall your mail server puts up.
2026-09-19 · 6 min read
Why PDF fonts look wrong on another computerYour PDF looked perfect until someone else opened it. What font embedding is, why substitution wrecks a layout, and how to avoid it.
2026-09-19 · 6 min read