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Crop PDF Margins

Trims the white margins around a PDF after finding where the content is. Use one area for all pages or one per page, and drag the frame by hand if you need to.

On-device・No uploadMobile friendlyWorks offline

Your files and input are processed only inside your browser on this device and are never uploaded to our servers.

Drop a file here

or

PDFs are processed in this browser on your device and never uploaded.Accepts: PDFUp to 300 MB per filePaste (Ctrl+V) also works

How to use

  1. paper.pdfWide margins

    Add a PDF

  2. paper.pdfKeep 5 mm of margin

    Choose the area to keep

  3. paper (cropped).pdf

    Save the cropped PDF

Choose the area to keep, then save the cropped PDF

  1. Drop a PDF or click “Choose files”. Try “Use sample” to see how it works.

  2. Under “How to trim”, choose “Same area on all pages”, “Auto per page” or “Set by hand”.

  3. For the automatic modes, adjust the margin to keep (mm). The frame in the preview shows the area that stays.

  4. For “Set by hand”, type the top, right, bottom and left amounts, or drag the edges of the frame in the preview.

  5. Click “Create trimmed PDF” and download.

What it does

Finds the content area automatically

Each page is drawn and the area of darker content (text, figures, rules) is measured. A single stray speck is ignored.

One area for all pages, or per page

Use the combined content area of all pages so the pages stay aligned, or trim each page to its own content.

Margin to keep, in mm

Choose how much space to keep around the content, starting from 0 mm, so the content is not cut too tightly.

Set the frame by hand

Type the amounts for each side, or drag the edges of the frame in the preview.

Content unchanged

Text and images are not redrawn; only the area a viewer shows (the CropBox) changes, so quality is kept.

Use cases

  • Remove the white margins left by scanning or conversion to make the content fill the page
  • Trim a document whose content sits in different places on each page
  • Keep a few millimetres of space around the content for printing or screen viewing

Supported formats

Input

PDF (.pdf)

Output

PDF (.pdf)

Capability matrix

FeatureSupportNotes
Automatic content area (same area on all pages)Supported—
Automatic content area (per page)Supported—
Margin to keep (mm)Supported—
Manual frame (numbers and dragging)Supported—
Deleting text and images outside the areaNot supportedData outside the area stays in the PDF. To hide it, use PDF Redact
Arbitrary-angle deskewNot supported—
Grey backgrounds and dark scan edgesPartialLight backgrounds may count as content. Dark scan edges are kept as content, so adjust them by hand
Password-protected PDFsNot supported—

Limits & notes

  • Also works on phones and tablets, but a PC is more reliable when moving the frame by hand.
  • Up to 300 MB and 1000 pages per file.
  • The content area is found from an image of about 600 pixels on the longest side of each page.
  • Trimming only changes the visible area. Text and images outside it stay in the PDF, and some viewers can show them again.
  • Some viewers and printers may still show the area outside the trimmed box.

Privacy & safety

Finding, trimming and saving all happen in your browser; your PDF is never sent to a server.

FAQ

Does trimming delete the text outside the area?
No. Trimming only changes the visible area (the CropBox), so text and images outside it stay in the PDF. To remove that information, use PDF Redact.
Can I trim every page to the same margins?
Yes. “Same area on all pages (auto)” trims all pages to one area that contains the content of every page. Choose “Auto per page” for a different area on each page.
What if I cut too much?
Increase “Margin to keep (mm)”. With “Set by hand”, reduce the amounts for the sides.
Are light backgrounds and dark edges trimmed?
A paper that is close to white is trimmed to its content. A grey scan background or dark scan edges may be kept as content, so set them by hand.
Does trimming reduce quality?
No. The page content is not redrawn, only the visible area changes, so text and image quality are the same as before.
Is my PDF uploaded?
No. Finding, trimming and saving all happen in your browser; the PDF is never sent to a server.

PDF Page Size

Scanned or phone-photographed PDFs often mix page sizes. Set them all to A4 or another paper size: scale the pages to fit, or keep their size and centre them. The original size of every page is listed first.

No upload

PDF Redact

Black out a part of a PDF and remove the text and images under it. Redacted pages are turned into images and the file is rebuilt, so the text under the black box is not left on that page. After export, the file is checked automatically for leftover text and document data.

No upload

Organize PDF Pages

Drag thumbnails to reorder pages, and rotate, delete, duplicate or insert blank pages — all visually. Your PDF is processed on your device and never uploaded.

No upload

Images to PDF

Drop images, put them in order and get one PDF. Choose page size, orientation and margins; phone photos are rotated correctly. Images are converted on your device and never uploaded.

No upload

Compress PDF

Drop a PDF to cut its size. Only photos and scans are recompressed, so text and graphics stay crisp. Your PDF is processed on your device and never uploaded.

No upload

PDF Editor

Lay text (Japanese included), shapes, arrows, a highlighter, freehand drawing and images on top of a PDF, and fill in its form fields. Text, shapes, highlights and freehand strokes are written as PDF vectors and real text, never as pictures; an added image is embedded as an image. Rewriting the original text and true redaction are not possible.

No upload

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