How to Convert Images to PDF: Free Online Tool

Need to combine photos, screenshots, or scanned documents into a single PDF? This Image to PDF Converter lets you merge multiple images into one PDF file directly in your browser — no upload to any server, no sign-up required. Supports JPG, PNG, and WebP with full control over page size, orientation, margins, and image fitting.

What Is an Image to PDF Converter?

An image to PDF converter takes one or more image files and arranges each one onto its own page inside a PDF document. The result is a single, portable PDF file you can share, print, or archive.

This tool processes everything locally in your browser using JavaScript. Your images never leave your device.

How to Convert Images to a PDF

Step 1: Upload Your Images

Click the upload area or drag and drop image files. You can add up to 50 images at once.

Supported formats:

• JPEG / JPG — photos, scanned documents
• PNG — screenshots, graphics with transparency
• WebP — modern web images

Each file can be up to 10 MB. Most photos and screenshots are well within this limit.

Step 2: Arrange the Page Order

After uploading, your images appear in a list. Each image becomes one page in the final PDF, in the order shown.

• Use the up/down arrow buttons to reorder pages
• Use the trash icon to remove individual images
• Use Clear all to start over

The list shows each image's filename, pixel dimensions, and file size so you can verify you have the right files.

Step 3: Configure Settings

Adjust the PDF output using the settings panel:

Setting	Options	Default	What It Controls
Page Size	A3, A4, A5, Letter, Legal	A4	Dimensions of each PDF page
Orientation	Portrait, Landscape	Portrait	Page direction — tall or wide
Margin	0 to 25 mm	10 mm	Space between image and page edge
Fit Mode	Contain, Cover, Stretch	Contain	How images scale to fit the page
Quality	30% to 100%	85%	Image compression level in the PDF

Step 4: Convert and Download

Click the Convert to PDF button. The tool renders each image onto its own PDF page according to your settings. When finished, you see the total page count and file size.

Click Download PDF to save the file to your device.

Understanding Fit Modes

The fit mode controls how each image is placed within the printable area of the page (page size minus margins).

Contain (Default)

Scales the image to fit entirely within the page area while maintaining its aspect ratio. If the image doesn't match the page proportions, there will be white space on two sides. This is the safest option — nothing gets cropped.

Best for: Documents, screenshots, mixed-orientation photos.

Cover

Scales the image to fill the entire page area while maintaining its aspect ratio. Parts of the image that extend beyond the page edges are cropped. No white space, but some content may be cut off.

Best for: Full-bleed photo prints where edge-to-edge coverage matters more than showing every pixel.

Stretch

Scales the image to exactly match the page area, ignoring the original aspect ratio. The image fills the page completely but may appear distorted if its proportions don't match the page.

Best for: Backgrounds, patterns, or images that were already designed to match the target page size.

Choosing the Right Settings

For Printing Documents

• Page Size: A4 or Letter (match your printer's paper)
• Orientation: Portrait for text-heavy documents, Landscape for wide tables or panoramic images
• Margin: 10–15 mm (ensures content isn't cut off by printer margins)
• Fit Mode: Contain
• Quality: 85%+

For Sharing Photos

• Page Size: A4
• Orientation: Match the dominant photo orientation, or Portrait for mixed
• Margin: 5–10 mm
• Fit Mode: Contain or Cover
• Quality: 90–100%

For Archiving Scanned Documents

• Page Size: Match the original paper size
• Orientation: Match the scan orientation
• Margin: 0 mm (scans already include margins)
• Fit Mode: Contain
• Quality: 85%

For Minimizing File Size

• Quality: 30–60%
• Fit Mode: Contain (avoids rendering offscreen pixels)
• Margin: 0 mm

Tips for Better Results

1. Sort files before uploading. Name your files with numbers (e.g., 001-cover.jpg, 002-intro.jpg) so they appear in the right order when selected.

2. Use high-resolution source images. PDF pages print at 72–300 DPI depending on the viewer. Low-resolution images will appear pixelated when printed. For best print quality, use images that are at least 2,000 pixels on the longest side.

3. Match orientation to content. If most of your images are wider than they are tall, use Landscape. If they're taller, use Portrait. This minimizes white space and maximizes image size on each page.

4. Preview before sharing. Open the downloaded PDF in a viewer to confirm page order, image quality, and margins before sending it to others.

5. Reduce quality for email. If you need to email the PDF and file size matters, drop the quality to 60–70%. The visual difference is usually minor, but the file size reduction is significant.

Frequently Asked Questions

Is my data private?

Yes. This tool runs entirely in your browser. Your images are never uploaded to a server. The PDF is generated locally using JavaScript and stays on your device until you download it.

Can I convert a single image to PDF?

Yes. Upload one image and click convert. You'll get a single-page PDF with that image.

What's the maximum number of images?

You can convert up to 50 images into a single PDF. Each image can be up to 10 MB.

Can I mix different image formats?

Yes. You can combine JPG, PNG, and WebP images in a single PDF. Each image is processed independently.

Can I mix portrait and landscape images?

Yes. The page size and orientation you select apply to every page in the PDF. Images that don't match the page orientation will be centered with white space on the sides (in Contain mode). For best results, group images by orientation and create separate PDFs, or use the orientation that matches most of your images.

Why is my PDF file so large?

PDF file size depends on the number of images, their resolution, and the quality setting. To reduce size:

• Lower the quality slider to 60–70%
• Use JPEG source images instead of PNG (JPEG images compress more efficiently)
• Resize source images before converting if they're extremely high-resolution

What's the difference between this and "Print to PDF"?

Browser "Print to PDF" is designed for web pages and often adds headers, footers, and unpredictable page breaks. This tool is purpose-built for images — each image gets its own clean page with precise control over sizing, margins, and fit mode.

Can I add text or watermarks?

No. This tool converts images to PDF pages without modification. For adding text, watermarks, or annotations, use a PDF editor after conversion.

Does it preserve image quality?

The quality slider controls JPEG compression when embedding images in the PDF. At 100%, images are embedded at their original quality. Lower values reduce file size at the cost of some detail. PNG images with transparency will have a white background in the PDF.

What page sizes are available?

Size	Dimensions (mm)	Common Use
A3	297 × 420	Posters, large prints
A4	210 × 297	Standard documents (international)
A5	148 × 210	Booklets, half-page prints
Letter	216 × 279	Standard documents (US, Canada)
Legal	216 × 356	Legal documents (US)

When to Use an Image to PDF Converter

• Combine scanned pages — merge multiple scanned pages into a single document PDF
• Create photo portfolios — arrange photos in a professional multi-page PDF for clients
• Submit document uploads — many forms require a single PDF instead of multiple images
• Archive receipts and invoices — consolidate photos of paper receipts into one organized file
• Prepare print-ready files — set exact page dimensions and margins for professional printing
• Share screenshots — combine multiple screenshots into one file for bug reports or documentation

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Note: This tool processes images in your browser using the jsPDF library. No data is sent to any server. The generated PDF conforms to the PDF specification and is compatible with all standard PDF viewers and printers.