How to Flatten a PDF: What It Means and When You Need To
Flattening a PDF merges all layers, form fields, and annotations into a single permanent layer. Here's when you need to flatten, how to do it free, and what you'll lose if you do.
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Compress PDF
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PDF File Size Guide: What's Normal and How to Shrink Any PDF
A practical reference for normal PDF sizes by document type — text-only, scanned, photo-heavy — plus the four biggest causes of bloat and the fastest fix for each scenario.
Read ArticleHow to Make a PDF Smaller on Mac, Windows, iPhone, and Android
Every platform has its own way to reduce PDF file size. Here's the fastest method on Mac, Windows, iPhone, Android, and any device with a browser — including free options with no software to install.
Read ArticleHow to Send a Large PDF by Email Without Being Blocked
Email attachment limits block large PDFs constantly. Here's every method for sending a large PDF — compression, cloud links, splitting, and more — all free.
Read ArticleHow to Compress a PDF Without Losing Quality
Compressing a PDF doesn't have to mean blurry images or broken formatting. Here's how PDF compression actually works, which level to choose for your use case, and how to shrink any PDF for free in your browser.
Read ArticleWhy Is My PDF File So Large? (And How to Fix It)
Large PDF files are almost always caused by one of a handful of fixable problems — high-resolution images, scanned pages, embedded fonts, or revision history. Here's what's making your PDF bloated and how to shrink it for free.
Read Article21 free PDF tools — right in your browser.
Merge, split, compress, convert, protect, and more — no account required.