About JPG to PDF
A PDF page does not really contain a picture — it contains a reference to an image object plus instructions for where to paint it. That detail is the whole story here, because the image objects PDF carries natively include JPEG data in its original DCT-compressed form. So when this tool converts a JPG it reads the file’s bytes, wraps them in a PDF image object, and writes a page whose content stream draws that object. The compressed data is copied verbatim: nothing is decoded, resampled or re-compressed, and there is no second round of generation loss on top of whatever the camera or export already baked in. Only the geometry is calculated. The pixel dimensions come out of the JPEG header, are converted to points, and are used either to size the page to the image exactly (Auto) or to place the image inside a fixed page according to your fit and margin settings. All of that arithmetic happens in this tab, on your device.
How to JPG to PDF
- 01
Add your JPGs
Drop one file or a hundred onto the drop zone. The list order becomes the page order, and you can drag to rearrange it.
- 02
Pick the page geometry
Leave page size on Auto for pages that match each photo exactly, or choose A4 or Letter if the file will be printed.
- 03
Convert
Press Convert to PDF. Because the JPEG bytes are copied rather than re-encoded, this is fast even for large batches.
- 04
Download
Save the PDF. No file content was uploaded, and nothing persists once the tab closes.
What this tool does
- Original JPEG data embedded byte-for-byte — zero re-compression and zero added quality loss
- Auto page size makes each page exactly the size of its image, with no letterboxing
- Fixed page sizes with contain, cover or fill placement and a point-precise margin
- Batch conversion with drag-to-reorder page ordering
- Runs entirely in the browser tab: no upload, no queue, no watermark
Limitations worth knowing
Every PDF tool has constraints. Stating them plainly is more useful than discovering them halfway through your work.
- Progressive and CMYK JPEGs are re-encoded rather than copied verbatim, because PDF cannot carry those variants directly.
- This page keeps the stored JPEG orientation. Use Photo to PDF to apply JPEG EXIF rotation and mirror flags without re-encoding the image.
- The PDF is roughly the sum of your JPEG file sizes — embedding is lossless, so it cannot make photos smaller. Run Compress PDF afterwards if you need a smaller file.
- Very large batches of high-resolution photos are bounded by the memory your browser tab can use.
How your file is handled
This tool runs entirely inside this browser tab. When you choose a file, your browser reads it from your own disk and hands the bytes to JavaScript running on this page — no network request carries your document anywhere. You can confirm that yourself: open your browser’s developer tools, switch to the Network panel, and run the tool. You will see no upload.
Nothing is stored after the fact. Closing or reloading this tab discards the file, the result and everything derived from them, because none of it ever left your machine. Read how local processing works.
Questions about JPG to PDF
Does converting JPG to PDF reduce image quality?
No. The JPEG data is embedded in the PDF exactly as it exists in your file, with no decoding or re-compression step, so the image in the PDF is identical to the image you started with.
What does the Auto page size actually do?
It gives each page the natural dimensions of its own image, converted from pixels to points. Nothing is scaled and there are no white bars. A fixed size such as A4 instead scales the image to fit and may letterbox it.
Can I control the order of the pages?
Yes. Files are converted in the order shown in the list, and you can drag the cards to rearrange them before converting.
Is a multi-page PDF from many JPGs smaller than the JPGs themselves?
No, it is slightly larger — the same compressed data plus PDF structure. Lossless embedding cannot shrink a photo. Compress PDF can, at a quality cost you choose.
Are my photos uploaded anywhere?
No. Reading the files, computing the geometry and writing the PDF all happen in this browser tab. You can watch the network panel stay silent while you convert.
Tools that pair with this one
- PNG to PDFConvert PNG screenshots, diagrams and logos to PDF without softening a single edge.
- Images to PDFDrop a mixed pile of JPG, PNG, WebP and BMP files and get one coherent PDF.
- Photo to PDFHonour JPEG EXIF orientation, then choose the paper shape you need.
- PDF to JPGRender each page of a PDF as a JPG image, at the resolution you pick.
- Compress PDFMake a PDF smaller by re-encoding its images and cleaning up its internals.
- Merge PDFCombine several PDFs into a single document, in the order you choose.