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Practical guides on PDF tools, image formats, browser security, and why keeping files local matters.
How to Merge PDFs Without Uploading Them
Most online PDF mergers upload your files to a server — including contracts, invoices, and confidential documents. Here is how to do it entirely in your browser.
Why Your PDF Tools Shouldn't Be Uploading Your Files
Every time you use an online PDF tool, your document may be stored on a third-party server for days. Here is what actually happens and what to use instead.
Compressing PDFs: File Size vs. Quality Explained
Why PDFs can be surprisingly large, what compression actually removes, and how to choose a target size without making your document unreadable.
PDF to JPG: When (and When Not) to Convert
Converting a PDF to images loses text selectability, searchability, and copy-paste. Here is when the trade-off is worth making and when to keep the PDF.
HEIC to JPG: The iPhone Photo Problem and How to Fix It
Since iOS 11, iPhones save photos in HEIC format. Windows cannot open them, most websites reject them, and email clients show a blank file. Here is the fix.
Image Compression Formats Compared: JPG vs WebP vs AVIF in 2026
Which format gives the best quality at the smallest file size? A practical comparison of JPG, WebP, and AVIF with real numbers and browser support data.
How Browser-Based File Tools Actually Work (WebAssembly Explained)
WebAssembly lets your browser run near-native code for tasks like PDF processing and image compression. A plain-English explanation of what is happening under the hood.
PDF Privacy: What Happens to Files on Free Online Tools
Free PDF tools have to make money somehow. When you upload a document, where does it go, how long is it kept, and who can access it? We investigated.
How to Remove Pages from a PDF Without Uploading
Three ways to delete pages from a PDF — including a fully browser-based method that never uploads your file to any server.
How to Add Page Numbers to a PDF
A practical guide to numbering PDF pages — using browser tools, desktop software, and Word — with notes on which approach preserves your file's privacy.
How to Compress a PDF for Email Attachments
Most email providers cap attachments at 10–25 MB. Here is how to reduce a PDF's file size — from quick browser-based options to server-side tools for image-heavy documents.
How to Extract Text from a PDF
Copy, paste, or download text from any PDF — including options that work without uploading your file to a server. Plus why scanned PDFs are different and what to do about them.