NovaPDF Guides
Practical answers to the questions people actually have about working with PDFs — one guide per tool, each linking straight to the tool it covers.
How to Compress a PDF Without Losing Quality
Shrink a PDF's file size while keeping text and images readable — what actually makes PDFs large, how to pick a compression level, and how to hit an exact size limit.
How to Merge PDF Files Into One Document
Combine multiple PDFs into a single file in the right order — when merging makes sense, how page order and page size are handled, and what to check before you send the result.
How to Merge PDF Files on iPhone or iPad
Combine PDFs on an iPhone or iPad without installing an app — getting files into Safari, setting the page order on a small screen, and finding the merged file afterward.
How to Split a Large PDF Into Smaller Files
Break one PDF into several smaller ones or pull out a range of pages — the difference between splitting by range, by interval, and by target size, and when to use each.
How to Crop a PDF's Margins
Trim white space or unwanted margins from PDF pages, apply the crop to one page or the whole document, and avoid the mistakes that make a crop look inconsistent across pages.
How to Convert Photos or Scans to PDF
Turn JPG or PNG images into a single PDF — page order, orientation, page size choices, and what actually affects the final quality.
How to Fix a Sideways or Upside-Down PDF
Why scanned PDFs come out rotated the wrong way, how to fix the whole document at once, and what to do when only one page in a file is turned wrong.
How to Delete Pages From a PDF
Remove unwanted pages from a PDF — cover sheets, blank scans, duplicate pages — while leaving the rest of the document untouched, plus how this differs from extracting or splitting.
How to Extract Pages From a PDF
Pull specific pages out of a longer PDF into a new file, combine non-consecutive ranges in one pass, and know when this is the better fit over split or remove.
How to Add Page Numbers to a PDF
Stamp page numbers onto every page of a PDF — choosing a position, a number format, and how to number just part of a document or start from a number other than one.
How to Convert a PDF to JPG or PNG Images
Turn PDF pages into image files — when to pick JPG over PNG, how quality settings affect the result, and what happens with multi-page documents.
How to Reorder, Rotate, and Delete PDF Pages
Fix a PDF with pages in the wrong order, a few sideways scans, and a couple you no longer need — all in one pass, without juggling three separate tools.
How to Add a Watermark to a PDF
Stamp text or a logo across every page of a PDF — how to pick opacity and position so it marks the document without making it unreadable.
How to Fill Out an Existing PDF Form
Type into a PDF's existing text fields, checkboxes, and dropdowns, then lock the answers in — or leave it editable for later. What a fillable form is, and what to do if a file has none.
How to Make a Scanned PDF Searchable (OCR)
What OCR actually adds to a scanned PDF, what affects recognition accuracy, and what to expect for longer or multi-language documents.
How to Permanently Redact Text From a PDF
Why covering text with a black box isn't the same as removing it, and what a tool needs to actually do to redact a PDF safely before you share it.
How to Sign a PDF Online
Add a signature to a PDF by drawing, typing, or uploading an image — what kind of signature this is, and how to place it correctly on the page.
How to Compare Two PDF Files for Differences
Spot exactly what changed between two versions of a PDF, page by page, without scrolling back and forth trying to catch differences by eye.
How to Scan a Document to PDF With Your Phone
Turn photos of a paper document into a clean PDF — getting a usable photo in the first place, cropping out the background, and combining pages in order.