Combine Images into One PDF: Page Size, Order and Large Images

Choose the page size before generating

Use Fit to Image for pages that follow each image's proportions; use A4, Letter or A3 when you need a standard paper size. In either case, each accepted image becomes one page. Open Image to PDF for the converter; this guide explains the choices that affect your result.

Standard paper options centre the whole image within a 10 mm margin, keeping its proportions. If the image and page have different shapes, there will be extra blank space. This is fitting, not cropping. The current tool does not offer a setting to force every mixed image onto portrait pages.

A worked example: one landscape image and one portrait image

Take a 1200 × 800 px image, followed by an 800 × 1200 px image. With Fit to Image, the page sizes are approximately 317.5 × 211.7 mm and 211.7 × 317.5 mm. With A4, they are 297 × 210 mm and 210 × 297 mm. The image order stays the same; the page shape changes.

Fit to Image calculates the physical size at 96 pixels per inch; it does not promise to retain a camera's print-DPI metadata. Very long pages use a smaller physical scale to stay within PDF page-size limits. That physical scaling alone does not remove image pixels, but a separately approved resize does.

For a long receipt, Fit avoids the added A4 margins, but it can still be awkward to print. For a fixed-paper submission, inspect the smallest text after export: fitting a very tall image onto one A4 page can make it difficult to read.

Set the order and check the accepted files

The order shown in the image grid becomes the PDF page order. Do not assume a filename such as 01-receipt.jpg will automatically sort the batch: the current tool has no filename-sort control.

1. Add your JPG/JPEG, PNG, WebP, GIF or BMP files. Check the accepted-image count and any warnings; selecting a file does not guarantee it was added.
2. Drag the cards into the right order on a browser that supports the drag interaction. If your touch browser does not reorder reliably, clear the list and add the images one at a time in the required order.
3. Choose the page size, then choose Merge All – One PDF File. The separate-output option creates one PDF per image instead.
4. Generate and download the PDF. Reopen it and check the page count, order, orientation and small print before sharing.

For photographed documents, crop away an unnecessary desk or background before conversion if it makes the content too small. See the image cropping guide. Cropping should not remove signatures, page numbers or other information the recipient needs.

Why a small file can trigger a large-image warning

File size and decoded image size are different. A heavily compressed photo can take little disk space while still containing millions of pixels that need browser memory during conversion. A 6000 × 4000 image contains 24 million pixels (24 MP), regardless of its file size.

The current limits are 40 images, 25 MB per file and 120 MB per batch, as labelled in the tool. The byte limits use 1024-based units (25 MiB and 120 MiB). There are also device-aware pixel budgets:

Phones, tablets, some low-memory browsers and compatibility mode use the smaller budget. It is a safety policy, not a benchmark of your device. There are also image-dimension and generated-output limits, so being below 40 files does not guarantee that a batch will fit.

When a supported image needs a smaller working copy, the dialog shows its original and proposed pixel dimensions. Resize copy & continue permits that reduction; Skip this image leaves it out. Your original file is untouched. An image beyond the source-safety limit is rejected before decoding and may need resizing in an image editor first.

For the 24 MP example, standard processing can keep the image dimensions if the batch has room. Constrained processing needs your permission to reduce it to its working budget. Always check the dimensions in the dialog rather than expecting every device to make the same choice.

Fix the result you actually see

• A page is missing: compare the accepted-image count with your intended page count. Read the warning for a skipped file, an unsupported format, a size limit or a decoding failure. A skipped image will not appear in the PDF.
• The text looks blurred: inspect the original first, then check whether you approved a smaller copy. Enlarging the PDF page cannot recover detail absent from the source. A legible source matters more than choosing A3.
• The PDF is too large: conversion does not target a chosen file size. Try fewer images or smaller source copies, or review the PDF compression guide after export. Inspect fine text again after any compression.
• The browser runs out of room or conversion fails: retry with a smaller batch and close memory-heavy tabs. Check individual files if the same image keeps failing. A file that cannot be decoded may need to be re-exported from a trusted image editor.
• A phone photo is sideways: check the preview and exported page. The tool reads supported image-orientation metadata, but a photo whose pixels are already sideways without useful metadata needs correction before conversion.

What happens to your files

Image decoding and PDF generation happen in your browser; this converter does not upload the selected image contents for processing. The page can still make network requests for site assets and analytics, so local conversion does not mean the whole webpage has no network activity. Keep the original files and review the downloaded PDF before sending it elsewhere.

Frequently asked questions

How many images can I combine in one PDF?

The current batch limit is 40 accepted images, with up to 25 MB per file and 120 MB per batch as labelled in the tool. Pixel and output-size budgets also apply, so a batch of large images can reach a limit before 40 files.

Does A4 crop or stretch my images?

No. Each image is scaled proportionally, centred within a 10 mm margin and placed on a portrait or landscape A4 page according to its shape. Extra blank space is expected when the image and page have different proportions.

Will my original photos be resized?

The original files on your device are not changed. If an image exceeds the processing budget, the tool asks before creating a smaller working copy. Accepting reduces pixel dimensions and may lose detail; choosing Skip leaves that image out of the batch.

Will the PDF have searchable or editable text?

This tool places images on PDF pages; it does not perform OCR or recreate editable text. Text inside a photo remains part of the image.

What happens to an animated GIF?

GIF and other supported animated images contribute only their first frame. The output PDF does not preserve animation.