Merging PDFs with Mixed Page Sizes? Fix A4 vs Letter, Cropping & Orientation

Why merged PDFs look inconsistent

• A4 vs Letter mismatch: documents created in different countries or templates.
• Scanned pages: extra borders/background around the page content.
• Mixed orientation: some pages portrait, some landscape.
• Wrong order: pages are merged but not arranged correctly.

Important: “Merge” combines files as-is. The cleanup happens after merge (crop/rotate/reorder).

Step-by-step: merge and fix mixed page sizes

Step 1: Merge the PDFs in the correct document order

1. Open Merge PDF.
2. Upload all PDF files.
3. Arrange files in the correct sequence.
4. Download the merged PDF.

Step 2: Reorder pages (if needed)

If pages inside the merged PDF are not in the right order, use Reorder PDF and drag & drop pages into the correct sequence.

Step 3: Crop borders to standardize the look

1. Open Crop PDF.
2. Crop to the actual content area (remove scanner borders/margins).
3. Apply consistently to all pages where possible.
4. Download the cropped PDF.

Cropping is the fastest way to make mixed-size pages look consistent, especially when the real issue is scanned borders.

Step 4: Fix sideways pages

1. Open Rotate PDF.
2. Rotate the pages that are sideways.
3. Download the corrected PDF.

Step 5: Remove blank or unwanted pages

Use Delete pages to remove blank pages, duplicates, or instruction pages that got included during merging.

Step 6: Compress the final PDF for sharing

1. Open Compress PDF.
2. Compress the final cleaned PDF.
3. Confirm readability at 100% zoom (especially signatures and small text).

Quick checklist (professional output)

• Pages look consistent (no heavy borders or random scaling differences).
• No sideways pages.
• Correct order for review (key documents first).
• File size is reasonable for email/client portals.