Convert JPG to PDF — Free JPG to PDF Converter
Free JPG to PDF conversion, batches included — everything runs on your device.
A PDF puts your image on a page with a real physical size, which is what makes it the format to reach for when something has to be printed, signed or submitted. Worth knowing how ours does it: the image is re-encoded as JPEG at quality 92 before it goes onto the page, so this isn't a byte-for-byte passthrough of your original. On a photo you won't see the difference. On a JPEG you have already compressed hard, you're paying for a second pass.
How to Convert JPG to PDF
Select your JPG files
Drop images in — every common format works.
Convert to PDF
Runs automatically; open advanced settings to tune quality.
Download
Save files singly or as one ZIP.
Why Convert JPG to PDF?
PDF is the standard format for documents, reports, and printable files. Converting a JPG photo to PDF makes it easy to share as a formal document, include in a multi-page report, or prepare for professional printing. Many institutions and services specifically require PDF format for submissions.
The resulting PDF matches the exact dimensions of your original photo. The image is embedded at full quality without re-compression, so there is no quality loss during conversion. The PDF can be opened on any device with a PDF viewer — which is virtually every device.
LeanImg converts your JPG to PDF entirely in your browser. Your images never leave your device — no upload, no server processing, no data stored anywhere. This is especially important for sensitive documents like ID photos, receipts, or personal records.
For batch photo-to-PDF conversion, drop multiple images and download them individually. After converting, you may want to compress your images first for smaller PDF files.
Compress your images first · PNG to PDF · PDF to Text — Free Online Text Extractor
What changes going from JPG to PDF
A JPEG is a single image; a PDF is a page with an image on it. LeanImg decodes your JPEG to pixels, re-encodes them as a JPEG at quality 92 through the browser's own encoder, and places that image edge to edge on a page whose dimensions equal the pixel width and height, landscape when the picture is wider than it is tall. One input file gives one single-page PDF; several images are not merged into one document.
Because the page image is regenerated rather than copied, this is a lossy step even though both ends are JPEG. On a camera original saved at high quality the second pass is invisible; on a JPEG already squeezed hard for the web, quality 92 typically makes the file larger, not smaller, because the encoder spends bytes faithfully describing the first encoder's artifacts.
Metadata does not make the trip. EXIF orientation is applied while decoding, so a portrait phone photo lands upright, but the EXIF block itself, GPS, the capture date and any ICC profile are gone, and a CMYK or progressive JPEG comes out as baseline RGB. The page dimensions come from the pixel count rather than the DPI field in the JPEG, so a print dialog scales the page to fit the paper instead of honouring the size your scanner wrote, and the PDF holds no selectable text.
Don't do this when a form or portal simply wants the photo; attach the JPG itself and reach for PDF only when the recipient needs a page.
JPG vs PDF
| Feature | JPG | |
|---|---|---|
| File Type | Image | Document |
| Use Case | Photos, web | Documents, printing |
| Multi-page | No | Yes (one page per image) |
| Device Support | Universal | Universal |
| Printing | Basic | Professional |
| Sharing | As image | As document |
What is a PDF file?
PDF is a page description format Adobe shipped in 1993 and handed to ISO in 2008, where it lives as ISO 32000. It belongs in a converter because it's where images go when they need a physical page size. There's no such thing as PDF compression: every image stream inside declares its own filter, so a careful JPG to PDF converter can copy the JPEG in byte for byte and be genuinely lossless. Transparency depends on the header version, since alpha only arrived in PDF 1.4 in 2001.
| Released | 1993 by Adobe. ISO 32000 since 2008 |
| Compression | Per stream. Each embedded image declares its own filter |
| Transparency | 8 bit alpha through /SMask, only in PDF 1.4 and later |
| Color depth | Up to 16 bits per component, only in PDF 1.5 and later |
| Page size | Stored in points, independent of pixel count. It sets print DPI |
| MIME type | application/pdf |
How to open a PDF file
PDF needs an embed, object or iframe and a real viewer rather than an img tag, but every platform ships one anyway. macOS Preview renders, annotates, reorders and merges pages; Edge is the default handler on Windows 10 and 11; Linux has Evince, Okular and Firefox's PDF.js. For extraction work, poppler-utils gives you pdftoppm to rasterize pages and pdfimages to pull the embedded originals back out at full quality.
Convert other formats to PDF
Convert JPG to other formats
Frequently Asked Questions
How to convert JPG to PDF?
Open LeanImg in any browser and drop your JPG files into the converter. PDF files are created instantly on your device. It is free, requires no sign-up, and your images are never uploaded to any server. Each image becomes a single-page PDF.
Is it safe to convert JPG to PDF online?
Yes. LeanImg creates the PDF entirely in your browser. Your images are never uploaded, never stored on a server, and remain completely private. This is especially important for sensitive photos like ID cards, receipts, or personal documents.
How to convert JPG to PDF on iPhone?
Open Safari on your iPhone and visit LeanImg. Select your JPG photos from the camera roll and download PDF versions instantly. No app needed — the converter works directly in your mobile browser on any iPhone model.
Will the PDF have the same quality as my JPG?
Yes. The JPG is embedded in the PDF at full quality without re-compression. The PDF page size matches the original image dimensions exactly. There is no quality loss during the conversion process from JPG to PDF.