Crop PDF Online
Processing entirely on your device — large files may take a moment.
Enter how many points to trim from the top, right, bottom and left (1 pt = 1/72 inch; a typical scanner margin is 20-40 pt) and every page's crop box shrinks accordingly — the original content is preserved, only the visible window changes.
Cropping is non-destructive here: the full page data stays in the file, so printing and text selection behave exactly as before — viewers and printers simply honor the new crop box.
How to crop PDF
- 1
Select your files
Drag & drop your PDF files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to PDF". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted PDF file individually, or grab everything at once as a ZIP archive.
About the PDF format
PDF (Adobe, 1993; ISO 32000 since 2008) exists for one promise: the document looks identical everywhere, forever. Fonts get embedded, layout is fixed to the point, and a contract printed from a 2003 file renders the same as one created this morning. That fixed-layout guarantee made it the standard for invoices, manuals, forms, e-books and anything with legal or financial weight.
The same design is what makes PDFs stubborn. They are meant to be presented, not edited — text lives in positioning operators rather than paragraphs, so extraction and re-flow are approximations. Scanned PDFs are worse: pure images with no text layer at all until OCR enters the picture. Still, no other format comes close for final-form document delivery.
+Strengths
- ✓Pixel-identical rendering on every device and printer
- ✓Fonts, images and color profiles travel inside the file
- ✓Mature ecosystem: forms, signatures, annotations, encryption
!Limitations
- −Hard to edit by design — even small changes need tooling
- −Text extraction is an approximation, not a conversion
- −Scanned PDFs are images without OCR
Frequently asked questions
Does cropping delete the trimmed content?
No. The PDF crop box only changes what is displayed and printed. Anyone with an editor can widen the box back — use redaction if content must truly disappear.
Can I use different margins per page?
One set of margins applies to all pages in this version. For mixed layouts, split the PDF first and crop each part separately.
What unit are the numbers in?
PDF points (1/72 inch). 72 pt ≈ 2.54 cm, so trimming 36 pt removes about 1.27 cm from that edge.