Why convert an image to PDF?
The most common reasons:
- A form or submission portal only accepts PDF files
- You need to combine multiple images into a single document
- You scanned a document with your phone and need it in PDF format
- You need to send a screenshot or photo in a professional format
- A service requires a document in A4 or letter page format
How to convert JPG/PNG to PDF free
- Open the free image to PDF converter
- Upload your image (JPG, PNG, or WebP)
- Select the page size (A4 for international use, Letter for US)
- Choose margin settings if needed
- Click Convert and download your PDF
No account required. Processing is done in your browser — the image is never uploaded.
Page size guide
| Page size | Dimensions | When to use |
|---|---|---|
| A4 | 210 × 297 mm | International documents, most of Europe and Asia |
| Letter | 215.9 × 279.4 mm | United States and Canada |
| Legal | 215.9 × 355.6 mm | US legal documents |
| Fit to image | Same as image dimensions | When you want no white borders |
Tips for the best result
- Use "Fit to image" for photos: if the image is a photo (not a document scan), fitting the PDF to the image size avoids white borders and keeps the aspect ratio natural.
- Use A4 or Letter for document scans: if the image is a scan of a page — a receipt, contract, or form — use the matching standard page size so it looks like a proper document.
- Compress the image first: if your source image is very large (over 5MB), compress it first before converting — this keeps the final PDF file size manageable.
Converting multiple images to a single PDF
If you have multiple images to combine into one PDF (multiple scanned pages, a photo series), most single-image converters require you to convert each separately and then merge the PDFs.
The fastest workflow for multiple images:
- Convert each image to PDF individually
- Merge the resulting PDFs using a PDF merge tool (iLovePDF and PDF24 both offer this free)
Alternative: print to PDF from any image viewer
On any modern operating system, you can right-click any image file and choose "Print," then select "Save as PDF" or "Microsoft Print to PDF" (Windows) or "PDF" from the print dialog (Mac). This works without any tool and produces a PDF sized to the paper format you select.
The limitation: less control over margins and image scaling compared to a dedicated converter.
Summary
Convert any image to PDF for free using the image to PDF converter— no account, no upload. Use A4/Letter for document scans and "fit to image" for photos. For multiple images, convert each separately then merge.