PDF Crop Tool
Trim margins, remove whitespace from scanned pages, or resize the visible area of any PDF — free, no account required, and nothing leaves your device. Set your margins in millimetres, choose which pages to crop, and download instantly.
Drop your PDF here, or click to browse
Single PDF file · up to 100 MB
How It Works
Upload your PDF
Drop any PDF onto the tool or click to browse. Your file is read directly into browser memory via the File API — nothing is sent to a server.
Set your margins
Enter how much to trim from each edge in millimetres. Values are converted to PDF points (1 mm = 2.83 pt) before being applied.
Apply the crop box
pdf-lib sets a CropBox on each target page. The content outside is hidden but not destroyed — text stays selectable, links stay active.
Download instantly
The cropped PDF is saved to a Blob in your browser and downloaded directly — no upload, no waiting, no server.
Why users trust this tool
- Your PDF never leaves your device
All cropping runs locally using pdf-lib in your browser. No file is ever uploaded or stored on any server.
- Non-destructive cropping
The crop box hides content outside the trim area without deleting it. Text remains selectable and embedded links stay active.
- Always free
No account, no subscription, no watermarks on the output PDF. Free for everyone, every time.
How to Crop a PDF Online
- Drop your PDF onto the upload area or click to choose it from your device.
- Enter the crop margin for each edge — top, right, bottom, and left — in millimetres. Set any edge to 0 to leave it unchanged.
- Choose whether to apply the crop to all pages or a page range (e.g. "1-3, 5").
- Click Crop PDF and save the file from your browser's download bar.
What Is PDF Cropping?
PDF cropping works by setting a CropBox in the document's page metadata. The CropBox tells PDF viewers which rectangular region to display; anything outside that rectangle is hidden from view. Crucially, the underlying content is not removed — it is still present in the file and can be revealed by adjusting the CropBox in a PDF editor.
This is different from rasterising a page and redrawing it without the cropped region (which would be destructive and would lose selectable text). This tool uses pdf-lib to set the CropBox metadata directly — text, fonts, and embedded objects are all preserved exactly as they are in the original.
Common Use Cases
- Remove scanner borders — scanned documents often have wide white margins or black borders from the scanner bed.
- Trim presentation slides — remove blank space around slides exported to PDF so they fill the screen when presenting.
- Fit a document to a page size — adjust the visible area so the content matches a target print size without reflowing text.
- Crop a single chapter — use page range mode to apply different margins to one section of a longer document.
Frequently Asked Questions
Is my PDF uploaded to your servers when I crop it?
No. Your PDF never leaves your device. All cropping is done inside your browser using pdf-lib running in JavaScript. Nothing is sent to or stored on our servers.
Does cropping permanently delete content from my PDF?
No. This tool sets the CropBox in the PDF metadata, which hides the cropped-out area without destroying it. The underlying content is preserved and can be restored in a PDF editor.
Can I crop only specific pages?
Yes. Switch to "Page range" mode and enter the pages you want to crop, e.g. "1-3, 5, 8-10". Pages outside the range are left untouched.
Will the text in my PDF still be selectable after cropping?
Yes. This tool modifies the CropBox metadata without re-rendering any pages. Text remains selectable, links stay clickable, and the original formatting is preserved.
What is the maximum file size?
Up to 100 MB. Very large PDFs may take a moment to process depending on your device's speed and available memory.