Working with PDFs Online
PDFs are the internet's de facto standard for sharing documents that need to look identical on every device. But the format carries real complexity: files exported from design tools can be enormous, not all PDFs behave the same way across readers, and the line between "compressing without losing quality" and "making the file unreadable" is thinner than most compression tools admit.
The most common practical problem is file size. A PDF exported directly from Word or InDesign often embeds high-resolution images at full quality — adding megabytes that don't improve readability at screen resolution. Email attachments have limits of 10–25 MB; document management systems are often stricter. Understanding how PDF compression works (DCT for embedded images, flate for text layers, font subsetting for typefaces) helps you choose the right compression level without guessing.
The second major area is archiving. If you're storing contracts, invoices, or compliance records for years, standard PDF has a critical limitation: it can reference fonts and colour profiles that may not be available in future. PDF/A (ISO 19005) solves this by embedding everything the file needs to render correctly, regardless of what software opens it in 20 years. It's the standard for legal, financial, and government archives — and knowing when to use it versus a standard PDF matters for long-term document integrity.
Third is conversion. Converting between PDF and Word, or combining images into a PDF, involves trade-offs the tool interface doesn't always surface. A Word-to-PDF conversion that preserves all formatting requires the source document's fonts to be available. A PDF-to-Word conversion that produces editable text requires OCR on scanned documents and is never perfectly lossless. The guides below cover what to expect from each conversion type and how to get the best results with the tools available.
All tools on this page process files in-memory — nothing is stored server-side, and files are discarded immediately after processing.
PDF Guides & Tutorials
I Compressed 50 PDFs With 6 Different Tools — Here's What Actually Worked
Real test results: Ghostscript, qpdf, Smallpdf, iLovePDF, Adobe's online compressor, and MyEasyTools across 50 PDF files. Compression ratios, quality assessments, and honest conclusions.
PDF/A vs Standard PDF: When Archival Format Actually Matters
What PDF/A is, how it differs from regular PDF, which situations require it, and when a standard PDF is the better choice.
How to Reduce PDF File Size Without Losing Quality
Practical techniques to shrink PDF files for email, web upload, and sharing — without degrading text sharpness or making images look terrible.