画像をPDFに無料で変換する方法：JPG、PNG等

Converting images to PDF is needed in many contexts:

• Documentation: Scan a document with your phone camera (JPG) and need to send it as PDF.
• Portfolio: Combine multiple designs or photos into one professional file.
• Printing: Print shops prefer PDF over loose images for layout consistency.
• Archiving: PDFs are easier to organize and search than hundreds of loose images.
• Email: One 10-page PDF is easier to send than 10 image attachments.

Convert images to PDF instantly with the NexTools image to PDF converter — 100% browser processing.

Using the NexTools converter:

Step 1: Open the tool. No registration.

Step 2: Drag images (JPG, PNG, WebP, BMP, GIF, TIFF) to the upload area.

Step 3: Rearrange order by dragging.

Step 4: Select options: page size (A4, letter, original), orientation, margins.

Step 5: Click "Convert" and download your PDF.

Supported formats: JPG/JPEG, PNG, WebP, BMP, GIF, TIFF, SVG.

Privacy: Everything processed in your browser. No file leaves your computer.

If your images are large, compress first with the NexTools image compressor.

Scanned documents: A4, portrait, 300 DPI, grayscale if no color needed.

Design/photo portfolio: Original size, 300 DPI for print, RGB.

Presentations: A4 landscape for slides, reduced margins.

ImageMagick: convert image1.jpg image2.png output.pdf

With options: convert -page A4 -quality 85 *.jpg output.pdf

Python (Pillow):

from PIL import Image
imgs = [Image.open(f) for f in ["img1.jpg", "img2.jpg"]]
imgs[0].save("output.pdf", save_all=True, append_images=imgs[1:])

For quick use, the NexTools online converter is most practical.

1. Rotated image. Cameras store orientation as EXIF metadata. Some converters ignore EXIF. Fix: rotate beforehand.

2. PDF too large. A 5 MB JPG stays ~5 MB in PDF. Compress images BEFORE converting.

3. Image cropped or distorted. Happens when aspect ratio doesn't match page size. Use "original size" instead of forcing A4.

4. Low text quality. Scanned below 150 DPI. Re-scan at 300 DPI.

A PDF from images is just "photos of text" — you can't select or search text. For that you need OCR:

• Google Drive: Upload image, open with Google Docs. Auto-applies OCR.
• Tesseract (open source): tesseract image.png output -l eng pdf
• Adobe Scan (mobile): Free app with automatic OCR.

NexTools converts images to PDF without OCR (preserves original image). For searchable documents, use OCR afterward.

Images may contain sensitive information:

• EXIF metadata: Camera photos include GPS location, date, camera model.
• Visual content: Scanned IDs, passports, medical documents.

NexTools processes everything in your browser — files never leave your computer.

To combine the resulting PDF with others, use the NexTools PDF merger.