Photos of receipts, scans of certificates and screenshots all start life as separate image files, and forms usually want one PDF. Kwebby's JPG to PDF tool turns JPG, PNG, WebP, GIF and BMP images into a single PDF in your browser. You add the files, put them in order, pick a page size and download the result. Each image becomes one page. Your images stay on your device while the tool runs. This guide shows how to convert images to PDF, which formats work, and the small settings that decide whether the pages come out upright and the file stays a sensible size. More free PDF tools are a click away.
Key Takeaways
- Kwebby's JPG to PDF tool puts one or many JPG, PNG, WebP, GIF or BMP images into a single PDF, one image per page.
- Reorder pages with the ◀ and ▶ buttons on each thumbnail (they appear on hover on a computer and stay visible on a phone). Dragging only adds files, and × removes an image.
- Page size is A4, Letter or Fit to Image. Images are centred and scaled to fit, never cropped.
- WebP, GIF and BMP files are converted to PNG in your browser before they go into the PDF. A GIF gives its first frame only. TIFF and HEIC files do not open in most browsers, so save them as JPG or PNG first.
- JPG data goes into the PDF unchanged, so the PDF is about as large as your photos. Shrink large photos first.
- The file downloads as images.pdf, and nothing is uploaded.
What Is the Kwebby JPG to PDF Tool?
Kwebby's JPG to PDF tool is a free, browser-based utility that turns one or more images into a single PDF. Add JPG or PNG files, put them in the order you want, choose A4, Letter or Fit to Image and download. Each image becomes one page, and nothing is uploaded.
The tool also handles general image to PDF jobs. For PNG screenshots and graphics, the PNG to PDF page explains how transparency and file size behave.
Key Features and How It Works
Many Images, One PDF
Select several files at once or drop them onto the upload area. Each file appears as a thumbnail with its name and size, and the button label shows the count, for example Convert 3 Images to PDF.
Reorder and Remove
Hover over a thumbnail to show ◀ and ▶ (on a phone they are always visible). They move the image one place left or right. The × removes it. The page order in the PDF matches the thumbnail order.
Three Page Sizes
| Page size | Dimensions | Best for |
|---|---|---|
| A4 | 595 by 842 points | Forms, printing outside the US |
| Letter | 612 by 792 points | Forms, printing in the US |
| Fit to Image | The image's own pixel size | Scans where you want no blank space |
On A4 and Letter, each image is centred and scaled to fit the page without cropping. A wide image fills the page width and leaves blank bands above and below. A small image is enlarged to fill the page, so a low-resolution picture can look soft. Fit to Image avoids both effects.
Images Go In Without Extra Compression
The tool places JPG data in the PDF as it is. In a test, a 1.34 MB JPG produced a PDF of the same size. PNG files are stored without loss, and transparent areas of a PNG show the white page.
Local Processing and Automatic Download
The tool builds the PDF with pdf-lib, an open-source JavaScript library, inside your browser. When it finishes, your browser downloads the file as images.pdf.
Why Convert Images to PDF
A PDF is one file that opens the same way everywhere, which makes it the easy choice for sending several pictures. Common reasons to convert are:
- Forms and portals: many accept only PDF, and your certificate or ID may exist only as a photo.
- Expense reports: receipts become one attachment.
- Scans: a phone scan of several pages becomes a single document.
- Portfolios and inspections: product photos or site pictures go out as one report.
- Printing: every page has a fixed size.
How to Use the JPG to PDF Tool
You need at least one JPG or PNG image. The steps take under a minute.
- Click the upload area or drag your images onto it. You can pick several at once.
- Check the thumbnails. Use ◀ and ▶ to reorder, or × to remove.
- Under Page Size, choose A4, Letter or Fit to Image.
- Click the red convert button. Its label reads Convert N Images to PDF, with N as your image count.
- Open the downloaded images.pdf and check the page order and orientation.
Best Practices for Converting Images to PDF
Which Image Formats Work
JPG and PNG files go into the PDF as they are. WebP, GIF and BMP files are decoded by your browser and stored as PNG, which is lossless and can be larger than the original, and an animated GIF gives only its first frame. TIFF and HEIC photos do not open in most browsers (Safari is the usual exception), so the tool names the file it cannot read and stops. Save those files as JPG or PNG in any image editor, or use your phone's export option, then remove the file from the list and try again.
Check Photo Orientation
Phone photos often carry a hidden flag that says which way is up. Browsers read it, so thumbnails look upright, since MDN notes that the default is to use the image's EXIF information. The tool stores the raw pixels, so a photo can come out sideways in the PDF. If a page is turned, fix it with Rotate PDF.
Choose the Page Size for the Purpose
Use A4 or Letter when a form or printer expects a standard page. Use Fit to Image when you want each scan or screenshot at its own size with no blank bands.
Shrink Large Photos Before You Convert
Because JPG data goes in unchanged, ten 5 MB photos make a PDF of about 50 MB. Many upload forms cap files at a few hundred kilobytes, so make the images smaller first with Image Optimizer. Compress PDF rewrites the file structure afterwards, but it does not resample images, so it will not shrink photos much.
Remember That Text in Images Is Not Selectable
A scanned page is a picture, so you cannot search or copy its text. If you need selectable text, run the image through JPG to Text first.
Rename the Download
Every file is called images.pdf. Rename it before you send it, or you will end up with several files of the same name. If you have more PDFs to join, Merge PDF combines them.
Common Use Cases
- ID and certificate uploads: turn a photo into the PDF a portal asks for.
- Receipts and invoices: gather them into one expense attachment.
- Scanned homework or notes: make a multi-page PDF from phone pictures.
- Portfolio and product sheets: send one file instead of a folder of images.
- Site and inspection photos: put images in the order of the visit.
- Screenshots: capture steps in one document.
Related Kwebby Tools
- Merge PDF joins your image PDF with other documents.
- Rotate PDF turns sideways pages upright.
- Compress PDF rewrites the file structure after conversion. Savings vary with the content.
- Image Optimizer reduces image size before you convert.
- PNG to PDF covers PNG screenshots and graphics, with notes on transparency and file size.
- PDF to JPG goes the other way, from PDF pages to images.
Frequently Asked Questions (FAQs)
How do I convert a JPG to PDF?
Open Kwebby's JPG to PDF tool and add your JPG file. Choose A4, Letter or Fit to Image, click Convert to PDF and open the downloaded images.pdf.
Can I convert PNG or WebP images to PDF?
Yes. PNG files go in as they are, and WebP, GIF and BMP files are converted to PNG in your browser first. TIFF and HEIC files do not open in most browsers, so save them as JPG or PNG before you add them.
How do I combine multiple images into one PDF?
Add all the images together, then use the ◀ and ▶ buttons on each thumbnail to set the order. Each image becomes one page, in that order.
Does converting a JPG to PDF reduce quality?
No extra compression is applied. JPG data goes into the PDF unchanged and PNG is stored without loss. On A4 or Letter, a small image is enlarged to fit the page and can look soft. Fit to Image keeps its own size.
Why is my photo sideways in the PDF?
Phone photos can carry a hidden orientation flag. Your browser uses it for the thumbnail, but the PDF stores the raw pixels. Fix the page with Rotate PDF.
Is the Kwebby JPG to PDF tool free, and are my images uploaded?
The tool is free to use, with no account or payment. It converts your images in your browser and does not upload them to a server.
Final Thoughts
Turning images into a PDF is a three-minute job when the files are the right type, the order is right and the photos are not oversized. Kwebby's JPG to PDF tool handles the rest: a clean A4, Letter or fit-to-image page for every picture, built on your device. Save odd formats as JPG or PNG first, check the orientation and then merge, compress or rotate the result with the other PDF tools.