Converting images to PDF is one of the most common document tasks. Whether you need to compile photos into a single document for sharing, create a PDF portfolio of your work, package scanned receipts for expense reporting, or combine screenshots into a presentation handout, pdftools.one makes it fast and easy. The entire process runs in your browser with no software installation, no account creation, and no file uploads to any server.

Step-by-Step Instructions

1. Upload your images. Click the upload area or drag and drop one or more image files. The tool accepts JPG, JPEG, PNG, and WEBP formats. You can upload multiple files at once, and add more files later by clicking the upload area again. Each image is displayed with a thumbnail preview, file name, size, and pixel dimensions.

2. Arrange the order. Use the up and down arrow buttons next to each image to reorder them. The final PDF will contain one image per page in exactly the order shown in the list. You can also remove individual images by clicking the X button if you change your mind about including them.

3. Choose page size.Select from three options: A4 (the international standard at 210 × 297 mm), Letter (the US standard at 8.5 × 11 inches), or Fit to Image (each page matches the exact dimensions of its image). For most printing purposes, A4 or Letter is recommended. For digital viewing where you want to preserve original image proportions, choose Fit to Image.

4. Set margins. Choose from None (images extend to the page edge), Small (20pt), Medium (40pt), or Large (60pt) margins. Margins add white space around each image, which is useful for printing since most printers cannot print to the very edge of the paper. For digital-only documents, None or Small margins work well.

5. Create and download.Click the “Create PDF” button and wait for processing to complete. The tool embeds each image into a new PDF page, scaling it to fit within the available area while maintaining the original aspect ratio. Once complete, click the download button to save your PDF.

How Image Scaling Works

When using A4 or Letter page sizes, each image is scaled to fit within the printable area (page size minus margins) while maintaining its original aspect ratio. Images smaller than the available area are centered without upscaling, preserving their native resolution. Landscape images on portrait pages are scaled to fit the width, with vertical centering. This ensures your images always look their best regardless of orientation or size.

Supported Image Formats

The tool natively supports JPG (JPEG) and PNG images, which are embedded directly into the PDF without re-encoding. WEBP images are automatically converted to PNG format using the browser’s Canvas API before embedding. This means JPG and PNG files retain their exact original quality, while WEBP files undergo a lossless conversion to PNG. All common image types from digital cameras, smartphones, screenshots, and web downloads are fully supported.

Privacy and Security

Your images never leave your device. The entire conversion process runs locally in your browser using the pdf-lib JavaScript library. No data is transmitted over the internet at any point. This makes the tool safe for personal photos, confidential documents, business receipts, medical images, and any other sensitive content. You can verify this by disconnecting from the internet before converting — the tool will still work perfectly.

Common Use Cases

Expense reports: Photograph or scan receipts and combine them into a single PDF for submission. Photo albums: Create a PDF photo book from vacation pictures or event photos. Portfolios: Compile design work, artwork, or photography into a professional PDF portfolio. Documentation:Convert screenshots of software interfaces, error messages, or web pages into a PDF for bug reports or training materials. Scanning: If you use your phone camera as a scanner, combine the resulting images into a proper multi-page PDF document.