Crop PDF

Usually no, or only marginally. PDF cropping changes the visible page box (the CropBox or MediaBox), but the underlying content stream — text, images, fonts, vector data — is preserved in full. The cropped-away area still lives inside the file; the viewer just clips its display. If you want a smaller file, run the output through Compress PDF afterwards, or convert pages to images and re-import. The one case where cropping shrinks size is when a downstream tool re-saves the PDF and physically discards the off-page content, which most editors do not do by default.

Yes. Cropping in any standard PDF tool — including this one — is non-destructive. The pixels and text outside the crop box are still embedded; any PDF editor (or even a "reset crop" button) can reveal them again. This matters for redaction: if you crop a page to hide a signature, name, or sensitive data, that data is still discoverable. To permanently remove content, use Redact PDF (which rasterises or strips the region) before sharing. Crop is for layout and printing, not for security.

Set your top/right/bottom/left margins in millimetres and choose "Apply to: All pages" — the same margin offset is applied uniformly to every page. This works well when your source PDF has consistent page dimensions (e.g. an export from Word or a scanner). For mixed page sizes (a portrait letter mixed with a landscape A3), the same mm offset will look different on each, so you may want to crop in batches using the Range option (e.g. "1-12" for the letter pages, then a separate pass for landscape pages).

Printers read the PDF page boxes — MediaBox, CropBox, TrimBox, BleedBox — and different drivers respect different boxes. After cropping, the CropBox is smaller than the MediaBox, so most desktop printers will scale the cropped region to fit your paper, which can make text bigger than expected. To print at exact size, use "Actual size" (not "Fit to page") in the print dialog, or crop to match standard paper dimensions (A4 is 210x297 mm, US Letter is 216x279 mm).

Yes. This tool only edits the page-box metadata using pdf-lib — it does not rasterise, recompress, or re-encode any content. Text remains selectable and searchable, vector graphics stay sharp at any zoom, embedded fonts are untouched, and image quality is identical to the original. Hyperlinks and bookmarks that point to in-page locations are preserved (though links that land outside the new visible area will no longer be reachable). If you need a "permanent" crop that bakes the visible area into the file, you would need to re-render pages, which this tool deliberately does not do.

Yes — use the "Apply to" selector. Choose "First page only" to crop just page 1 (useful for trimming a cover image), or pick "Range" and type any combination like "1, 3-5, 8" to target specific pages. To do odd or even pages, list them explicitly (e.g. "1, 3, 5, 7, 9" or paste a generated list). Pages you do not include in the range are left untouched, so a single document can mix cropped and uncropped pages — handy for booklet layouts where only the inside pages need a different margin.