BlogPDF tool
Best image to PDF converter
Convert JPG, PNG, WebP, GIF, BMP, TIFF, and SVG images to a single PDF document in your browser. Reorder pages, set A4 or original size, add padding - no Adobe, no upload, completely free.
What does image to PDF conversion do?
Image to PDF takes one or more image files (photos, scans, screenshots, drawings) and packages them into a single .pdf document where each image becomes one page. The result opens in any PDF viewer, is easy to share by email, and is accepted by virtually every document management system.
Why convert images to PDF?
- Universal compatibility. PDF is accepted everywhere: email, courts, hospitals, schools, banks, and HR portals.
- Fixed layout. Unlike JPEG or PNG, PDF preserves exact positioning regardless of the viewer or device.
- Multi-page documents. Combine a dozen scanned pages into a single shareable file.
- Compression and archival. PDF/A is the ISO standard for long-term document preservation.
- Smaller email attachments. Bundle 20 scanned pages as one PDF instead of 20 separate JPEGs.
How to convert images to PDF online
- Open Image to PDF.
- Drag and drop your images onto the drop zone, or click to browse. You can add up to 20 images at once.
- Reorder pages by dragging the thumbnails. The sequence here matches the final PDF page order.
- Choose page size: A4 (210x297 mm, the global standard) or Original size (PDF page matches the image dimensions).
- Set padding (0-100 pt) if you want white margins around each image.
- Click Create PDF. Processing runs entirely in your browser.
- Preview the PDF inline, then download it.
No sign-up, no watermark, no file upload to a server.
Supported image formats
| Format | Notes |
|---|---|
| JPEG / JPG | Most common photo format. No transparency. |
| PNG | Lossless. Transparency is rendered against white. |
| WebP | Modern web format. Fully supported. |
| GIF | First frame used. Animation not preserved. |
| BMP | Lossless Windows bitmap. |
| TIFF | High-quality scans and print-ready images. |
| SVG | Vector. Rasterized before embedding. |
Page size options explained
A4 (ISO 216)
A4 (210 x 297 mm / 8.27 x 11.69 in) is the international standard for documents, used in Europe, Asia, Africa, and South America. If you are creating a document for printing, office use, or professional sharing, choose A4.
The image is scaled proportionally to fit within the A4 page, centered, with any requested padding applied.
Letter (US)
US Letter (216 x 279 mm / 8.5 x 11 in) is the North American equivalent. Most PDF viewers auto-scale between A4 and Letter, so A4 documents print well on Letter paper with slight margins.
Original size
The PDF page dimensions exactly match the image pixel dimensions (at 72 or 96 DPI). Use this for:
- Archiving photos at their native resolution
- Exporting design assets without margin adjustment
- Creating PDFs where exact pixel-level control matters
How page padding works
Padding adds a uniform white border around each image inside its PDF page. A value of 0 means the image fills the page edge to edge. At 20 pt you get roughly 7 mm of margin, which gives a clean look for document submissions.
Tip: Courts, notaries, and government offices often require margins of at least 10-15 mm. Use 30-40 pt padding for formal documents.
JPG to PDF: the most common conversion
JPEG is the most popular format for smartphone photos and scanned documents. Converting JPG to PDF is the quickest way to:
- Submit scanned IDs to banks or government portals
- Send invoices and receipts in a single file
- Share holiday photos as a printable album
- Deliver project mockups for client review
The converter keeps the JPEG data intact where possible, avoiding double compression that would degrade photo quality.
PNG to PDF: preserving transparency
When a PNG with a transparent background is embedded in a PDF, transparent areas are rendered as white (PDF pages have a white canvas by default). If you need true transparency, embed the PNG in a PDF with a custom background, or use an SVG-capable PDF workflow.
For logos, icons, and diagrams, PNG to PDF via this tool is the fastest path to a print-ready file.
Scanning documents to PDF: best practices
When you photograph physical documents (receipts, letters, contracts):
- Use good lighting. Even, diffuse light prevents shadows across the text.
- Shoot straight-on. Perspective distortion makes text harder to read and causes OCR tools to fail.
- Set at least 300 DPI on your scanner or use a scanning app (Microsoft Lens, Adobe Scan) on your phone.
- Crop before uploading. Remove any desk or background before converting.
- Order pages before converting. Drag thumbnails into the correct sequence before clicking Create PDF.
Combining multiple images into one PDF
The tool supports up to 20 images per PDF, each becoming one page in order. This covers:
- Multi-page forms scanned on a flatbed scanner
- Contact sheets of product photography
- Step-by-step instruction manuals with screenshots
- Comic and manga pages bundled for sharing
- Medical imaging (X-rays, scan printouts) for second-opinion submissions
Drag thumbnails to reorder before generating. The left-to-right order maps to pages 1, 2, 3 and so on.
Image to PDF vs PDF merge: which should I use?
| Scenario | Tool |
|---|---|
| Starting from image files (JPG, PNG, etc.) | Image to PDF (this tool) |
| Already have multiple .pdf files | PDF Merger |
| Mix of images and PDFs | Convert images to PDF first, then merge |
File size considerations
PDF file size depends on the source images:
- Smartphone photos (3-10 MB JPEG each): a 10-page PDF may be 30-80 MB. Resize or compress images first if email size matters.
- Scanned documents at 300 DPI: typically 200-500 KB per page in JPEG-embedded PDF.
- Screenshots and diagrams: very small, often under 50 KB per page.
To reduce PDF size, use the PDF Compressor after creating the file.
Privacy and security
Your images are never uploaded to any server. All processing uses pdf-lib running in your browser tab via WebAssembly and JavaScript. The tab can work offline after the page loads. Close the tab on shared or public computers to ensure no image data persists.
How to use the PDF on different platforms
Most email providers accept PDF attachments up to 20-25 MB. PDF is preferred over multiple image attachments for anything formal.
WhatsApp, Telegram, Signal
These messengers compress images but pass PDF files through untouched. Converting before sharing keeps quality intact.
Google Drive / OneDrive / Dropbox
PDF files are natively previewed in all three services. Sharing a PDF link is cleaner than sharing a folder of images.
Print shops
Print shops prefer PDF or TIFF. Use A4 page size and 300 DPI source images for the sharpest output.
Frequently asked questions
Is there a watermark on the generated PDF?
No watermark. The PDF is created entirely on your device. No service provider is involved, so no branding is added.
Can I convert a screenshot to PDF?
Yes. Take a screenshot (PNG or JPEG), drag it into the tool, and download the PDF. Useful for preserving web pages, error messages, or design references.
Can I create a PDF from photos on my phone?
Yes. The tool works in mobile browsers (Chrome for Android, Safari for iOS). Tap the drop zone to open your photo library, select images, and download the PDF.
How many images can I combine?
Up to 20 images per PDF conversion.
Does the PDF support text search?
No. Embedded images are bitmaps and are not selectable or searchable text. For searchable PDFs with OCR, you need an OCR tool after conversion.
Can I password-protect the PDF?
After downloading, run it through PDF Protect to add an open password.
What quality is the image inside the PDF?
Images are embedded at their original resolution. No additional compression is applied. The JPEG quality you started with is preserved in the PDF.
Related tools
- PDF Merger: combine existing PDF files.
- PDF Compressor: shrink the finished PDF.
- PDF to Image: reverse: extract each PDF page as a PNG.
- Image Compressor: reduce image size before converting.