Image to PDF Converter – Combine Images Into One PDF
About the Image to PDF Converter
This converter takes a set of images and assembles them into a single PDF document, one image per page, in whatever order you arrange them. It accepts JPG, PNG, WebP, GIF, BMP, TIFF, and anything else your browser can display, and builds the PDF with jsPDF running locally, so scans of ID documents, receipts, and signed contracts never touch a server.
The reason to combine images into a PDF rather than send them loose is mostly practical. A PDF arrives as one attachment instead of fifteen, keeps its page order regardless of how the recipient’s file manager sorts things, and is the format most institutions actually accept. Bank applications, visa submissions, expense claims, and school assignments routinely require a single PDF, and photographing documents with a phone then combining them is the fastest route there.
Order is controlled by dragging cards in the grid. Files rarely arrive in the order you need them, especially when a phone names them by timestamp, so each card can be picked up and dropped into position, with the page number badge updating as you rearrange. Individual images can be removed with the button on their card without clearing the whole set, and more images can be appended at any point.
Page setup covers the common cases: A4 and US Letter for standard documents, US Legal for longer forms, and four margin options from none to 30mm. Orientation can be fixed to portrait or landscape, or set to Auto so each page follows the shape of its own image, which is what you want for a mixed batch of phone photos.
Everyone involved in building BigToolSite’s tools tested this with mixed portrait and landscape batches, transparent PNGs, very large phone photos, and long sets of scanned pages, checking how page placement responds to each margin and orientation setting and confirming that reordering by drag updates the output sequence rather than just the display.
If you need to go the other way and pull page images back out of a PDF, the PDF to Image Converter renders each page as a separate image file.
Phone photos at full resolution produce large PDFs, so running the images through the Image Compressor first keeps the final document under email attachment limits.
For a set of images at wildly different resolutions, normalizing them with the Image Resizer before conversion gives a more consistent-looking document.
How to Use the Image to PDF Converter
- Drop your images onto the upload area or click to browse and multi-select. Any format your browser displays is accepted.
- Each image appears as a card showing a thumbnail, its position number, filename, pixel dimensions, and file size.
- Drag cards to reorder them. The card you are dragging fades and the drop target highlights in green, and page numbers renumber once you release.
- Click the red × on any card to remove that image, or Add More Images to append another batch to the end of the queue.
- Choose a Page Size: A4, US Letter, or US Legal. Fit to Image places each image without a standard page frame.
- Set Orientation to Portrait, Landscape, or Auto, which picks per page based on whether each image is wider than it is tall.
- Pick a Margin: None, Small (10mm), Medium (20mm), or Large (30mm). Images are centered within the remaining space.
- Adjust Image Quality between 10% and 100%. Images are embedded as JPEG, so this directly controls the PDF’s file size. The default of 92% is close to visually lossless.
- Click Generate PDF. A progress bar tracks each image, and the finished file downloads automatically.
- Click Clear All to empty the queue and start again.
Example Usage
Task: combining four phone photos of a signed contract into one document
Settings: Page Size A4, Orientation Portrait, Margin Small (10mm), Quality 92%
Steps: upload all four, drag them into page order, click Generate PDF
Result: a four-page A4 PDF with each photo centered inside a 10mm margin, ready to email or upload to a portal
For a portfolio mixing landscape and portrait shots, set Orientation to Auto. Each page then matches the shape of its image, so a landscape photo gets a landscape page instead of being shrunk to fit a portrait one. This is the single setting that most improves how a mixed batch looks.
For receipts going into an expense claim, drop Quality to around 70% and use Margin: None. Receipt text stays readable at that quality, the images sit larger on the page, and the resulting PDF is small enough to attach anywhere.
One behavior to know about: transparent PNGs are flattened onto a white background before being embedded, because PDF pages have no concept of transparency in this context. A logo with a transparent background will come out on white, which is almost always what you want in a printed document.
Frequently Asked Questions
No. The PDF is assembled in your browser with JavaScript, so the images and the finished document stay on your device. That matters for ID scans, contracts, and financial paperwork.
Drag any card to a new position in the grid. The page number badges update as soon as you drop, and the PDF is built in whatever order the cards are showing.
There is no fixed limit, only your browser’s available memory. Very large batches of high-resolution photos will slow processing and can exhaust memory on a low-spec device.
A4 for most of the world, US Letter for the United States and Canada. Match whatever the recipient expects, since a mismatched size means their printer either scales your document or crops it.
It checks each image individually and gives landscape images a landscape page and portrait images a portrait page. For a batch with both, this uses the page area far better than forcing one orientation.
JPEG keeps the file size manageable, which matters because PDFs are frequently emailed. The quality slider gives you control over that tradeoff, and 92% is visually close to the original for most photos.
No. Transparency is filled with white before the image is embedded. This is standard for document PDFs and is normally the desired outcome for printing.
Lower the quality slider, which has the largest effect. Compressing or resizing the source images before conversion helps further, since a 12-megapixel photo carries far more detail than a printed page can show.
Yes. Click the red × on that card. The remaining images renumber automatically and the rest of your arrangement is preserved.
No. Images stay images, so text inside them is not selectable or searchable. Running the images through OCR first is the way to get a text layer.
