What do the margin presets do?

Narrow, Normal, and Wide trim equal percentages from every edge (5%, 10%, and 15%). Switch to Custom by dragging handles or adjusting the Left / Right / Top / Bottom sliders.

Can I crop only some pages?

Yes. Use the page checklist and Crop Selected Pages, or choose Crop All Pages to apply the same crop everywhere.

Does cropping delete content permanently?

Cropping clips what viewers display by setting CropBox and MediaBox. Content outside the crop is hidden and is not re-rasterized. Some PDF editors may still recover clipped regions.

Are my PDFs uploaded to a server?

No. Everything is processed locally in your browser. Your documents never leave your device.

Do you support password-protected PDFs?

Not yet. Unlock or remove the password before uploading, then try again.

Documents

Crop PDF

Crop PDF pages with presets or a custom rectangle in your browser.

Everything runs in your browserNo account requiredPrivacy-firstv1.0.0Updated Aug 5, 2026

Processed in your browser. Your files stay on your device and are never uploaded to Dockzio servers.

Tool

Drop a PDF here or browse.

One PDF · up to 25.0 MB

Why Dockzio?

Simple tools that respect your time and your privacy.

Free and instant

No subscriptions, no paywalls, no waiting.

No sign-up required

Open a tool and get to work immediately.

Private by design

Processing happens locally in your browser whenever possible.

Beautifully built

Clean, fast interfaces designed for everyday productivity.

About PDF crop

Trim margins or isolate a region on PDF pages without uploading anything. Use presets, fine-tune with sliders, or drag the live crop rectangle — then download a new file from your browser.

How it works

Dockzio updates each page's CropBox and MediaBox with pdf-lib. Viewers clip to the cropped region; page content outside the box is hidden, not rasterized.

Presets & manual

Start with Narrow, Normal, or Wide margins, then drag handles or edit left / right / top / bottom insets for a custom crop.

Selected or all pages

Apply the same crop to the pages you select, or crop every page in one step. Preview any page before you download.

Privacy first

Everything is processed locally in your browser. Your documents are never sent to a Dockzio server.

FAQ

Quick answers to common questions.

Upload a PDF, choose a margin preset or drag a custom crop rectangle on the live preview, select pages, then apply. Dockzio updates each page's CropBox and MediaBox in your browser and downloads the cropped file.

Learning Center

Short explainers that pair well with this tool — concepts first, then practice.

Browse Learning Center →