How to convert JPG to PDF on iPhone or Android

Choose images from your phone

The file picker depends on the phone, browser, and installed apps.

You may see sources such as:

• Photos;
• Files;
• Downloads;
• camera storage;
• cloud-provider shortcuts.

JPG to PDF accepts JPG, JPEG, PNG, HEIC, and compatible HEIF still images.

Select only the images required for the document and return to the browser after the picker closes.

Arrange image order on a touch screen

The image order becomes the PDF page order.

Drag images when touch dragging works comfortably, or use Move earlier and Move later for more precise control.

Check the first and last image before converting a large batch.

Use the Rotate controls for a sideways image instead of changing the global PDF page orientation solely to correct one photograph.

Choose page settings on mobile

A4, US Letter, and US Legal create standard fixed PDF page sizes.

Choose Portrait or Landscape for those page sizes.

Margins may be:

• No margin;
• Small;
• Large.

Fit page to image creates each PDF page from the image dimensions rather than using one standard paper size.

These settings apply to the whole job.

iPhone HEIC and HEIF images

Modern phones may store photos as HEIC or HEIF instead of JPEG.

PDFKaka can decode supported HEVC-based HEIC and HEIF still images in the browser.

Not every possible HEIF codec is supported.

The HEIC or HEIF conversion path decodes the image and converts it before embedding it into the PDF, so it should not be described as a lossless passthrough.

Watch mobile browser memory

High-resolution phone photos can use much more working memory than their compressed file size suggests.

A job may contain up to 30 images, but a device with limited available memory may struggle before reaching that maximum.

If the browser reloads, freezes, or cannot finish the conversion:

1. resize extremely large photos;
2. keep the original images;
3. close unnecessary tabs or apps;
4. retry with fewer images;
5. create more than one smaller PDF if necessary.

The conversion also has a processing time limit, so unusually heavy jobs may need to be reduced before retrying.

Download and verify the PDF

When conversion finishes, download the PDF and reopen it from Files, Downloads, or the browser's download list.

Check:

• page order;
• orientation;
• margins;
• page size;
• readability;
• final file size.

Do this before emailing or uploading the file somewhere else.