Convert Images to PDF Online Free - JPG, PNG to PDF

Images to PDF — Combine Any Image Format Into One Document

Whether you have a folder of JPEG photos from a scanner, a batch of PNG screenshots, a multi-page TIFF from your document camera, or HEIC shots straight from an iPhone, our free online converter turns them all into a single, shareable PDF in seconds. Unlike single-format converters, this tool accepts JPG, PNG, WEBP, TIFF, BMP and HEIC in the same session — you can mix formats freely, drag thumbnails to set the exact page order, and choose whether each image fills a standard A4 or Letter page or creates a PDF page sized precisely to its own pixel dimensions. No software to install, no watermark, and no account required.

How to Convert Images to PDF in 3 Steps

1. Upload your images — drag files onto the upload box, or click Select Images to choose JPG, PNG, WEBP, TIFF, BMP or HEIC files from your device. You can add more files after the first batch if needed.
2. Arrange the order — drag the image thumbnails into the exact sequence you want. Portrait and landscape images automatically determine their own page orientation in the output.
3. Convert and download — click Convert to PDF, wait a few seconds, then download your finished PDF or save it straight to cloud storage.

Supported Formats and What Makes Each Different

Most image-to-PDF tools accept only JPG and PNG. This converter handles the full range of formats you actually encounter:

Page Size, Orientation and DPI — How It Works

Understanding how your images map to PDF pages helps you get the right output the first time. Three aspects matter most:

• Fit-to-image mode creates one PDF page per image where the page dimensions exactly match the image's pixel size at its declared DPI. A 2480 × 3508 pixel image with 300 DPI metadata produces a 210 × 297 mm (A4) page — ideal for archiving scanned documents at their original physical size.
• A4 / Letter modes scale the image to fill the standard page while preserving the aspect ratio. Narrow margins are added where the image is shorter than the page. Use these when the output will be printed on standard paper or uploaded to a portal that expects consistent page sizes.
• Automatic portrait and landscape means you do not need to sort your images. An image wider than it is tall becomes a landscape page; taller-than-wide becomes portrait. Mixed batches — common with phone photos mixed with scanned A4 documents — are handled correctly in a single pass.
• DPI preservation for scans: TIFF and high-resolution JPEG files from document scanners typically embed DPI metadata (commonly 150, 200 or 300 DPI). The converter reads this metadata and sets the PDF's internal image resolution accordingly, so the file stays suitable for OCR processing or professional reprinting. Learn about the technical details in the PDF 32000 specification.
• Mismatched sizes in one batch: if you upload both 3:4 portrait phone photos and 16:9 landscape screenshots, each page is sized to its own image — so the resulting PDF has pages of varying dimensions. If you need uniform page sizes, choose the A4 or Letter option before converting.

Images to PDF vs. JPG to PDF vs. PNG to PDF — Which Should You Use?

PDF Awesome offers three related tools that overlap in purpose but each has a sweet spot:

• Images to PDF (this tool) is the right choice when your batch contains a mix of formats — for example, JPEG photos alongside WEBP downloads and a TIFF scan. It also handles HEIC, BMP and multi-page TIFFs that the single-format tools do not accept.
• JPG to PDF is a focused shortcut optimized for JPEG-only batches. If every file in your folder is a .jpg or .jpeg, this tool is marginally quicker to use because there is no format selection to worry about.
• PNG to PDF is likewise optimized for PNG-only workflows, particularly useful for screenshots, logos and graphics where the lossless format matters.

If you have a finished PDF and want to go the other direction — extracting its pages as images — use PDF to JPG or PDF to PNG. And if you need to combine the resulting PDF with other documents, pass it through Merge PDF afterwards.

Practical Use Cases

Converting images to PDF is useful in a surprisingly wide range of everyday and professional workflows:

• Digitizing paper documents — scan pages one at a time and bundle them into a single, searchable PDF. For best OCR results, scan at 300 DPI and use the TIFF or high-quality JPEG format, then convert. If the resulting file is large, run it through Compress PDF afterwards.
• Photo portfolios and lookbooks — designers and photographers combine full-resolution images into a polished PDF to send to clients. Use fit-to-image mode so every photo fills its page exactly, then protect the PDF with a password before sharing.
• Insurance and warranty claims — photograph damage or receipts on your phone and convert the HEIC shots directly to a multi-page PDF to attach to a claim email.
• Whiteboards and handwritten notes — photograph each board or page and convert the batch into a structured PDF for distribution after a meeting.
• Government and legal submissions — many portals accept PDF only. Convert scanned forms or supporting photos, then optionally add page numbers before uploading.
• Archiving negatives and slides — high-DPI TIFF scans of film negatives convert to a compact, portable PDF archive without any loss of the original resolution.

Tips for the Best Results

• Scan at 300 DPI for documents you will OCR or print. 150 DPI is fine for on-screen reading and produces smaller files; 600 DPI is rarely worth the size unless you are archiving fine print or detailed artwork.
• Name your files in the order you want them (01_, 02_, …) before uploading. They will load in alphabetical order, saving you drag-and-drop time for large batches.
• For mixed-size batches that need uniform pages, choose A4 or Letter rather than fit-to-image — this ensures every page has the same dimensions, which matters for printing and for some document management systems.
• Compress after converting, not before. If the PDF is larger than you need, run it through Compress PDF once conversion is done. Compressing individual images before conversion achieves less because the PDF compressor can de-duplicate repeated data across the whole document.
• Keep your originals. Converting to PDF is non-destructive — your source images are unchanged — but it is good practice to retain the originals at full resolution in case you need to re-export at a different DPI or format later.
• Need to edit the text in a scanned PDF? After converting, use Edit PDF to annotate or add text, or extract the raw text with Extract Text.

Frequently Asked Questions

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