THE FILES.CO JOURNAL
Notes on PDFs, privacy, and standards.
How the tools work, why your files never leave the browser, and the technical detail that matters.
How to Convert JPG to PNG Online (No Upload, No Install)
Need a JPG as a PNG for transparency or a cleaner edit? Here's how to convert it in your browser in seconds, with nothing ever leaving your device.
Jul 12, 2026 · 5 min readStandardsJPG vs PNG vs PDF: which format and when
JPG, PNG, and PDF each solve a different problem. Here's a plain guide to which one fits photos, sharp graphics, and multi-page documents, and when to convert.
Jul 11, 2026 · 6 min readGuidesHow to fill out a PDF form
Fill a PDF form in your browser with files.co. Type into fields, tick boxes, pick from dropdowns, and save with your answers baked in. Nothing gets uploaded.
Jul 9, 2026 · 5 min readGuidesHow to add page numbers to a PDF
Add page numbers to any PDF in your browser with files.co. Pick the position and format, start from any number, and nothing gets uploaded.
Jul 7, 2026 · 4 min readGuidesHow to add a watermark to a PDF
Stamp DRAFT, CONFIDENTIAL or your logo across a PDF right in your browser with files.co. Text or image, opacity, position, and no upload.
Jul 5, 2026 · 4 min readGuidesHow to extract or remove pages from a PDF
Pull out a chapter, drop blank pages, or save just the pages you need from a PDF — right in your browser, with nothing uploaded to a server.
Jul 3, 2026 · 5 min readNo spam. Just PDF craft.
Once in a while, a useful note on PDFs and privacy.