Guides, tips and comparisons on processing PDFs, images, audio and video.
How do you sign PDF documents with an electronic signature, what does SES level actually mean, and when is it enough? A comprehensive guide covering security and privacy.
6 min read
How-ToA step-by-step guide for anyone who wants to add a text watermark to their PDF file. Transparency, angle settings, and common mistakes, all covered here.
6 min read
ComparisonWe compared online tools, desktop software, and manual methods for adding watermarks to PDFs. Which one makes sense in which scenario, explained step by step.
6 min read
GuideA comprehensive guide to the logic behind adding text watermarks to PDF files, the technology involved, the security angle, and practical use cases.
7 min read
How-ToLearn how to shrink PDF files without sacrificing quality. A step-by-step compression guide, practical tips, and common mistakes to avoid.
5 min read
ComparisonWe compared manual methods, desktop programs, and online tools for splitting PDFs. We explain, objectively, which one makes sense in which scenario.
6 min read
GuideWhat does a PDF split tool do, how does it work, and is your data safe? A guide to selecting page ranges, splitting into individual pages, and choosing the right method.
6 min read
ComparisonWe compared browser-based tools, desktop programs, and manual methods for merging PDFs. We explain, with examples, which one makes sense in which scenario.
6 min read
How-ToA step-by-step guide to merging PDF files into a single document in the right order, online, with no installation or sign-up.
6 min read
GuideHow does PDF merging work behind the scenes? Your files are uploaded over HTTPS, merged in order on our server, and deleted automatically after about 2 hours.
9 min read
GuideAn explanation of how the organize-pdf page-reordering and page-deletion tool works, when it's useful, and what it means for your privacy.
6 min read
ComparisonAn unbiased guide comparing when the Compare PDF tool works best against manual methods and general-purpose online tools.
6 min read
How-ToA step-by-step guide for anyone who wants to combine JPG or PNG images into a single PDF file: uploading, ordering, converting, and common mistakes.
5 min read
ComparisonDifferent ways to turn JPG/PNG images into a PDF: doing it by hand, a desktop program, or an online tool. We compare when each one actually makes sense.
6 min read
GuideThe logic behind converting JPG/PNG images to PDF, what actually happens to your images during conversion, and when you'd need this tool.
5 min read
GuideHow image format conversion between JPG, PNG, WEBP, GIF, TIFF, and AVIF works, which format to choose for which situation, and how your privacy is protected during conversion.
7 min read
How-ToA guide to converting images between JPG, PNG, WEBP, GIF, TIFF, and AVIF: step-by-step instructions, when to choose which format, and tips for avoiding quality loss.
6 min read
ComparisonConverting images between JPG, PNG, WEBP, GIF, TIFF, and AVIF: a comparative guide to which method makes sense in which situation.
5 min read
ComparisonComparing ways to repair corrupted PDF files: when do online repair tools, desktop programs, and manual methods actually work?
6 min read
GuideHow to repair corrupted or unopenable PDF files: an explanation of xref table and trailer errors and how they're fixed.
6 min read
How-ToRepairing a corrupted or unopenable PDF file: a step-by-step guide to fixing xref and trailer errors.
7 min read
GuideWhat is Bates numbering, why is it used in legal documents, and how do online tools apply it securely? A comprehensive explainer guide.
6 min read
How-ToLearn how to add Bates numbers to legal documents step by step: choosing a format, using a prefix, ordering multiple PDFs, and common mistakes.
7 min read
ComparisonWe compare manual marking, desktop software, and online tools for Bates numbering. An honest look at which approach makes sense in which scenario.
7 min read