JPG to PDF converter

How it works

1. Add your images and put them in order with the ↑ and ↓ buttons. ↻ turns an image a quarter turn clockwise.
2. Choose the page size, orientation and margin. With A4 or Letter, each image is scaled to fit inside the margins without stretching and is centred on the page. With "Same as each image", every page is exactly the size of its image (1 pixel = 0.75 point, i.e. 96 pixels per inch) plus the margin.
3. Press Make PDF and download the file. Everything happens in your browser: the images are never uploaded.

Quality and file size

• JPG photos are copied into the PDF unchanged, so there is no quality loss and the PDF is about the size of the photos added together. This applies when the photo needs no turning.
• PNG images are also copied as they are, keeping sharp edges and transparency.
• WebP images, rotated images and phone photos stored sideways (with a rotation tag) are redrawn and saved as high-quality JPEG (92%), or PNG for PNG sources.
• Tick Make the PDF smaller to resize large photos to at most 2480 pixels on the long side (enough for a sharp A4 print at 300 dpi) and save them as JPEG at 80% quality. This usually makes phone photos several times smaller.

Worked example

Three photos, 4000 × 3000 pixels each (landscape), on A4 with a 10 mm margin and automatic orientation:

• A4 is 595.28 × 841.89 points (1 point = 1/72 inch). The photos are wider than tall, so each page is turned to landscape: 841.89 × 595.28 points.
• 10 mm = 28.35 points, so the space inside the margins is 785.20 × 538.59 points.
• The photo is scaled by the smaller of 785.20 ÷ 4000 and 538.59 ÷ 3000, which is 0.1795. It is drawn at 718.12 × 538.59 points, with 61.89 points (about 21.8 mm) left and right.
• The result is a 3-page PDF, about the size of the three photos added together.

Limits

• HEIC photos (the iPhone default) are not supported yet. Share or export them as JPG first, or set iPhone Camera → Formats → Most Compatible.
• Very large images, or very many, can run out of memory on a phone. Tick "Make the PDF smaller" or make several PDFs.
• The text in the images is not made searchable. To get the text out of an image, use the image to text (OCR) tool.
• Animated GIFs and other formats are not accepted; only the first frame would be kept anyway.