Combine Images into One PDF
Select your images, choose between pages that match each image and fitted A4 pages, and download a single PDF. The conversion happens in your browser, and the finished PDF can be passed to other tools without re-uploading.
By Yasir Yaseen · Updated November 2026
Drop one or more images here
or click to browse - merge JPG, PNG, WebP and more into one PDF
Ideal for receipts, portfolios, scanned forms, gallery handoff, homework, invoices, and turning a group of editable images into one shareable PDF.
Steps
1. Order your files first
Pages follow the order the images were added. There is no drag to reorder, so name files 01, 02, 03 or add them in sequence.
2. Add images
Each image can be up to 20 MB. Dropping new files on the upload box replaces the current set.
3. Pick Auto-size or Fit to A4
Compare the layouts below before choosing.
4. Create and download
The result page shows the PDF size. Use the follow-on options to merge it with other PDFs or extract its text.
Auto-size or A4
The two layouts are built differently, and the right one depends on where the PDF is going.
| Auto-size pages | Fit to A4 | |
|---|---|---|
| Page size | Each page takes the pixel dimensions of its image, one pixel per PDF point | 595 by 842 points, switching to landscape for images wider than tall |
| Margins | None; the image fills the page | 24 points on each side |
| Mixed image sizes | Pages differ in size within one PDF | Every page is the same size, images centred and scaled to fit |
| Small images | Small page | Scaled up to fit, so low-resolution images can look soft |
| Large photos | Very large pages: a 4000 by 3000 pixel photo gives a page of about 55 by 42 inches | Scaled down to fit |
| Best for | Viewing on screen, keeping images exactly as they are | Printing, forms, and sending documents that should look uniform |
Ordering and large images
Pages appear in the order the files were added. If you select many files in one go, the order depends on your operating system's file picker, which may not match what you expect. Numbering the file names (01, 02, 03) before selecting is the most reliable approach. Images that arrive through a tool handoff are added to the end of the current list.
Each image is limited to 20 MB, with no overall cap, so the practical limit is your device's memory. A pile of full-resolution phone photos produces a large PDF and can be slow to build on a phone. If a photo appears sideways in the PDF, straighten it first with the rotate tool and add it again.
Why the PDF can be bigger than your files
JPG and PNG files are embedded as they are, not re-compressed. A PDF of ten JPGs is therefore about the sum of the ten JPGs plus a small overhead, and combining never makes pictures smaller. PNG photos are the usual surprise: PNG is lossless and large for photographs, so a PNG-based PDF can be several times the size of the same pages as JPG.
Other formats, such as WebP or GIF, are redrawn on a white background and converted to JPG at 0.94 quality before embedding. That flattens any transparency to white, and it can make the file larger than the original WebP, since WebP is usually the more efficient format. If the PDF is too big to email or upload, shrink the images first with the image compressor, then run the conversion. Compressing before combining is better than trying to shrink the finished PDF.
Before you convert
A short checklist that avoids most of the rework.
- Name or add the files in the order you want the pages.
- Rotate any sideways photos, and crop borders if the pages should look like documents.
- Compress large photos first if the PDF has a size limit.
- Choose Fit to A4 for anything printed or submitted through a form; choose Auto-size to keep images exactly as they are.
- Afterwards, use Merge PDFs if you need to place these pages inside another document.
Frequently asked questions
- Can I reorder pages after adding them?
- Not in the tool. Pages follow the order the files were added, so remove all and add them again in the right sequence.
- Will PNG transparency be kept?
- PNG files are embedded as PNG. Images in other formats are redrawn on white and converted to JPG, so any transparency becomes white.
- Why is my PDF so large?
- Images are embedded without re-compression, so the PDF is about as big as the files you put in. Compress the images first.
- Which formats can I add?
- JPG and PNG go in directly. WebP, GIF and other formats your browser can display are converted to JPG first. HEIC files are best converted with the HEIC to JPG tool beforehand.
- Will small images look blurry on A4?
- They can. Fit to A4 scales every image to fill the page area, so a small image is enlarged. Use Auto-size to keep the original proportions and pixels.
- Is there a limit on the number of images?
- Each image can be up to 20 MB. There is no fixed limit on the count, but memory on your device sets a practical ceiling.
Related tools
Image compressor
Reduce image sizes before building the PDF.
Merge PDFs
Join the result with other PDF files.
PDF to images
Go the other way and export each page as PNG or JPG.
Further reading: How to convert images to a PDF and compressing images for the web.