What llms.txt is, and whether you need one
A proposed standard for telling AI models what your site contains. No major model reads it yet — here is the honest case for adding one anyway.
Insights
Document work,
explained properly.
Practical writing about PDF, image and document work — what is actually inside the file, which settings change the outcome, and how to get it right the first time. Every guide is written here, not reprinted.
Runs in your browserNothing uploadsNo signupWorks offline
Page 9 of 15
What makes a password strong in 2026
Length beats complexity, and the rules most sites enforce actively make passwords worse. What the current guidance says and why it changed.
QR code error correction, and how much data actually fits
Why you can put a logo in the middle of a QR code, how much damage one survives, and the mistakes that make codes fail to scan.
Why you cannot edit a PDF, and what to do instead
PDF was designed so pages do not change. Editing one is always a workaround — here is which workaround suits which kind of file.
Searchable vs scanned PDFs, and how to tell them apart
Two files that look identical on screen behave completely differently. One is text; the other is a photograph of text, and only one is findable.
PDF metadata: what it reveals, and how to strip it
Author names, software versions, edit timestamps and sometimes your full local file path travel inside every PDF you send.
How to convert PDF to Word without wrecking the layout
Conversion rebuilds paragraphs by guessing, because a PDF has none. Here is what survives, what does not, and when to skip it entirely.
How to get a PDF table into Excel without silent errors
Table extraction fails quietly. The numbers arrive, the columns shift, and nothing warns you. Here is how to check before you trust the figures.
How to convert HTML to PDF and keep the layout
A web page has no pages. Converting one to PDF means deciding where to break it, and most of the damage happens at those breaks.
Stop reading, start doing
Every tool in this guide is free.
154 browser-based utilities. No account, no upload, and no file size limit — your files are processed on your own device and never sent anywhere.
Browse all 154 tools