Crop PDF: guide, privacy and troubleshooting
Crop PDF is designed for a specific document workflow: crop pdf online free — trim the margins of every page. The best results start with a source file that opens correctly and has the pages or content you actually want to process. Before you begin, check that you selected the right document, confirm its orientation and page count, and keep an untouched copy if the file is important. This is especially useful for invoices, reports, application forms, study material and other documents where a small conversion difference can matter.
How to use Crop PDF
- Choose the PDF you want to trim.
- Type how many points to cut from the left, right, top and bottom — 1 point is 1/72 inch.
- Press “Crop PDF” and download the trimmed document.
After the tool finishes, download the result and open it in the application where you plan to use it. Check page order, headings, tables, symbols, images and any fields that matter to your workflow. PDF is a fixed-layout format, while formats such as Word and Excel represent content differently; conversions can therefore need a small manual correction. Scanned pages also behave differently from digital PDFs because the page may contain an image rather than selectable text. When a result does not look right, try a clearer source scan, a smaller batch, or the related tool linked on this page.
Privacy and local processing
PDFKaj's client-side tools process document content in your browser instead of uploading it to a PDFKaj document-processing server. The browser downloads the application code and any required libraries, then uses your device to read the selected file and prepare the output. Your original file remains unchanged; the generated file is offered for download. Some tools need an internet connection the first time they load code or language data, and the optional AI document assistant is different: it can send extracted text to OpenAI only after you provide a key and explicitly consent. Read the Privacy Policy for the details and exceptions.
Performance and troubleshooting
Processing takes memory as well as time. Large PDFs, high-resolution scans and documents with hundreds of pages may use substantial RAM, especially on phones or older laptops. If the browser becomes slow, close other tabs, try a smaller file, split a long PDF into sections, or use a device with more available memory. Keep the tab open until the download finishes. A failed conversion does not mean the source file was changed; retry with a copy and check whether the PDF is password-protected, damaged or unusually complex.
Large-file performance notice
Frequently asked questions
Does cropping delete the cropped content?
No. It only changes the visible area of each page — anything outside the crop still exists in the file. Delete pages entirely with Split PDF or Organize PDF.
How do I know how big the margins are?
A4 is 595 × 842 points, US Letter is 612 × 792. Measure the unwanted border and enter the same number here; the tool never crops more than half a page.
Can I crop only some pages?
Not in this tool — the same margin is applied to every page. Use Organize PDF if only a few pages need trimming.