Image to PDF Converter — Convert JPG, PNG, and WebP to PDF Free

Why Convert Images to PDF?

How to Convert Images to PDF

1. Open the image to PDF converter.
2. Click Upload Images or drag and drop your JPG, PNG, or WebP files onto the tool. Multiple files can be added at once.
3. Arrange the images in the correct order by dragging thumbnails. The order in the tool becomes the page order in the PDF.
4. Choose your page size (A4, Letter, A3, or Fit to Image) and page orientation (Portrait or Landscape).
5. Set image quality — higher quality means larger file size.
6. Click Create PDF. The PDF is generated in your browser and automatically downloads.

Page Size Options

Combining Multiple Images into One PDF

The ability to combine multiple images into a single PDF is one of the most useful features for practical document workflows. Without this capability, sharing 10 scanned document pages requires attaching 10 image files to an email, which is unwieldy and easily reordered by the recipient.

When combining images:

• Order matters: Arrange images in the correct reading order before generating. The first image in the upload list becomes page 1 of the PDF.
• Mix formats freely: You can combine JPGs and PNGs in the same PDF — the converter handles the format differences internally.
• Check orientation per image: If some images are landscape and some portrait, either rotate them before uploading or use "Fit to Image" page size so each page matches its image orientation.

Quality and File Size Trade-offs

Each image is embedded in the PDF at the quality level you specify. Higher quality preserves more detail but increases the file size — particularly important if the PDF will be emailed (attachment size limits) or uploaded (upload size limits).

Practical guidance on quality settings:

• High quality (100%): Use for documents you will print or archive. File size can be several MB per page for high-resolution photos.
• Medium quality (80%): Good for general sharing and on-screen reading. File size is reduced significantly with minimal visible quality loss.
• Low quality (60%): Acceptable for web viewing and quick sharing when file size is constrained. Noticeable compression artefacts on text-heavy images.

For scanned text documents (handwritten notes, printed forms photographed), keep quality high (80–100%) to preserve readability. For photographic content, medium quality (70–80%) typically provides an acceptable balance.

Privacy: Why Browser-Based Conversion Matters

Most online converters upload your images to a server, convert them, and send back the PDF. Your images — which may contain sensitive personal or professional content — are transmitted to and temporarily stored on a third-party server. Many services retain uploaded files for hours or days for processing infrastructure reasons.

The converter on PublicSoftTools uses the jsPDF library, which runs entirely in your browser. Your images are never transmitted anywhere — the PDF is generated locally and downloaded directly. This makes it appropriate for sensitive documents: medical records, legal papers, financial statements, proprietary designs.

Image Format Compatibility

JPEG / JPG

The most common format for photographs. JPEG uses lossy compression, so re-compressing a JPEG during conversion introduces additional quality loss. To minimise double-compression artefacts, use high quality settings when converting JPEGs.

PNG

PNG uses lossless compression and supports transparency. When a PNG with a transparent background is embedded in a PDF, transparency is usually filled with white (PDFs do not natively support image transparency in the same way as PNG files). If you need transparent images in a PDF, use vector graphics software instead.

WebP

WebP is a modern image format developed by Google offering better compression than JPG or PNG. Browser-based conversion handles WebP natively since modern browsers support it. If you are downloading images from the web, they may be in WebP format — the converter handles these directly without requiring a prior format conversion step.

HEIC (iPhone images)

HEIC is the default format for iPhone photos. Browser support for HEIC is limited — if you have HEIC images, convert them to JPG first using the HEIC to JPG converter, then use the image-to-PDF converter.

After Conversion: Common Next Steps

Compressing the PDF

If the resulting PDF is too large for email or upload limits, compress it using the PDF compressor. PDF compression can significantly reduce file size by optimising embedded images without requiring you to regenerate the PDF from scratch.

Adding text or annotations

Images-to-PDF conversion produces a PDF where text is not selectable (it is embedded as an image, not as actual text characters). To add searchable text, annotations, or form fields, open the generated PDF in a PDF editor (Adobe Acrobat, PDF-XChange Editor, or similar). For OCR (making the text in the image searchable), use an OCR tool on the generated PDF.

Merging with an existing PDF

If you need to insert images into an existing PDF document, convert the images to PDF first, then use the PDF merger tool to combine the two PDFs in the correct order. This is more reliable than trying to insert images directly into a PDF.

Mobile Use: Converting Photos from Your Phone

The converter works in mobile browsers (Chrome, Safari) as well as desktop. To convert phone photos:

1. Open the converter in your mobile browser.
2. Tap Upload Images. Your phone will offer to select from the camera roll or take a new photo.
3. Select the images, arrange if needed, and tap Create PDF.
4. The PDF downloads to your phone's Downloads folder or the location chosen by your browser's download manager.

This workflow is useful for quickly converting paper documents (receipts, notes, forms) photographed with your phone into a single PDF for submission or filing — without needing a desktop computer or third-party app.

Common Questions

How many images can I combine into one PDF?

The converter has no hard page limit, but very large PDFs with many high-resolution images may be slow to generate or exceed browser memory. For collections of 100+ images, consider splitting into separate PDFs of 20–50 pages and then merging them if needed.

Will my image quality be reduced?

At high quality settings (80–100%), visible quality loss is minimal. The original image is embedded in the PDF at the chosen quality level. If the original photo was low resolution, the PDF will reflect that — the converter cannot add detail that was not in the original image.

Can I convert a scanned document image and make the text searchable?

The image-to-PDF converter embeds the image as-is — text in the image is not recognised as text characters. To make text searchable, run the generated PDF through an OCR (optical character recognition) tool after conversion. This adds a text layer beneath the image layer, making the PDF text selectable and searchable.

What is the maximum image size?

Very large images (30+ megapixel photos) may take a few seconds to process. If you encounter memory issues with very large files, resize the images to a suitable resolution first using the image resizer. For document scanning, 200–300 DPI is sufficient for readable text; full-resolution camera photos are usually much higher than needed.