Are my images uploaded to a server?

No. All processing happens entirely in your browser using pdf-lib. Your images are never sent to any server.

Which image formats are supported?

JPEG and PNG are natively embedded. WebP and GIF are converted to PNG first using an HTML canvas, then embedded.

Can I choose the page size?

Yes - A4, US Letter, or Auto (the page resizes to fit each image at 96 DPI). Orientation and margin are also configurable.

How do I reorder images?

Drag the image cards into the order you want. Each card shows its page number. The PDF is generated in that order.

Is there a limit to the number of images?

Each image is capped at 50 MB and total input is capped at 200 MB. There is no fixed limit on the number of images.

Image to PDF Converter

PDF image compression

This tool embeds your images at their current resolution and format. For smaller PDF output:

Compress images with the Image Compressor before adding them here
Convert PNGs to JPEG or WebP (smaller file sizes for photographs) using the Image Format Converter
Resize images to your target page DPI before combining - a 6000×4000 photo embedded in an A4 page adds significant file size with no visible quality benefit at print scale

Accessible PDF note

A PDF containing only embedded images is not text-searchable and cannot be read by screen readers, making it inaccessible to visually impaired users and search engines. If your PDF needs to be:

Searchable: run the PDF through OCR (Optical Character Recognition) software such as Adobe Acrobat, Tesseract, or an online OCR service after creation
Screen-reader accessible: use a proper document authoring tool (Word, InDesign, LaTeX) rather than an image-based PDF for text-heavy documents

How to combine images into a PDF

Drop your images onto the drop zone or click Browse files to select them. Drag the thumbnails to reorder, choose your page settings, then click Generate PDF. Everything runs in your browser using pdf-lib: your images are never uploaded to any server.

Supported image formats

JPEG and PNG are embedded natively into the PDF, preserving full quality. WebP and GIF are converted to PNG first using an HTML canvas before embedding, which is handled automatically.

Choosing a page size

A4 (210 × 297 mm) is the international standard used throughout Europe and most of the world. Letter (8.5 × 11 in) is the North American standard. Auto resizes each page to fit its image exactly at 96 DPI: useful when you want the PDF dimensions to match the original image dimensions.

Setting a margin

A margin adds white space around the image on the page. Images are centered within the available area while preserving their aspect ratio. Select None to fill the page edge-to-edge.

Reordering pages

Drag any thumbnail card to move it to a new position. The numbered badge in the top-left corner of each card shows the current page number in the output PDF.