Free Image to PDF Converter

How It Works

1. Select or drop one or more images above.
2. Images appear in the order they'll be added to the PDF.
3. Reorder images using the up/down buttons if needed.
4. Choose page size, orientation, and margins from the options above.
5. Click "Create PDF" to generate your document instantly.
6. The PDF downloads automatically to your device.

Page Size & Orientation

A4 (default) is the international standard for documents. Letter size is common in North America. Fit to Image automatically sizes each page to match the image dimensions, useful when you want minimal cropping or stretching.

Margins & Spacing

Choose None for images that fill the page edge-to-edge, Small for a 10 mm border, or Medium for a 20 mm border. Margins create white space around images for a more professional look.

Supported Image Formats

• JPEG · Best for photographs and complex images.
• PNG · Best for graphics, logos, and images with transparency.
• WebP · Modern format with excellent compression. Converted to PNG for PDF compatibility.

Frequently Asked Questions

Can I reorder images after uploading?

Yes! Each image has up/down arrow buttons to move it within the PDF. Use these to arrange images in the order you want.

What happens if my image is smaller/larger than the page?

Images are scaled to fit within the page while maintaining aspect ratio. With "Fit to Image" mode, each page is sized to match the image exactly with no scaling or cropping.

Are my images uploaded to a server?

No. All processing happens locally in your browser. Your images never leave your device, making this completely private and secure.

Can I add images from different sources?

Yes! You can upload images in any order, then reorder them before creating the PDF. Drop multiple images at once or add them one by one.

What is an image-to-PDF converter?

An image-to-PDF converter combines one or more bitmap images (JPEG, PNG, WebP) into a single Portable Document Format file. Each image becomes a page, the pages stack in order, and the result is a portable, printable document that opens identically on any device with a PDF reader (Adobe Acrobat, macOS Preview, Edge, Chrome, every smartphone). A photo, a scan, a screenshot turns into something you can email, archive or print.

PDF was invented by Adobe in 1991 as a way to make documents reproduce identically across systems and printers. Three decades later, it remains the universal format for receipts, contracts, signed agreements, invoices, certificates and any artifact that must look the same on paper, on iPhone Mail and on a corporate laptop. Combining images into a PDF brings the same portability and printability to your photos, scans and screenshots.

This converter runs entirely in your browser using the pdf-lib library by Andrew Dillon (2017). Drag images into the drop zone, reorder them, set the page size and margins, and click Create PDF. The resulting file downloads instantly. None of your images are uploaded to any server, which makes the tool safe for receipts with bank details, ID document scans and any image you would not want to share with a third-party cloud service.

What is inside the converter

The drop zone at the top accepts drag-and-drop or click-to-browse, with support for JPEG, PNG, WebP, GIF and BMP up to 50 MB per file. As you drop images, each appears in a list below with a 60-pixel thumbnail, filename, dimensions, and up/down arrows to reorder. The PDF respects the order of the list, top to bottom.

Below the drop zone, a collapsible Page Settings panel exposes three controls: page size (A4 default, Letter for US/Canada, or Fit to Image for borderless screenshot PDFs), margin (none, small 10 mm, or medium 20 mm), and orientation (portrait or landscape). The defaults produce a clean A4 portrait PDF with no margin, which is the most common case for scanned documents.

When you click Create PDF, the tool runs pdf-lib in the browser, embeds each image (with automatic format conversion for WebP), generates the pages, and triggers a download. A progress bar shows the encode-and-assemble step for large batches. The output file is named after the timestamp by default; rename it after download if you prefer.

History and background

Adobe Acrobat 1.0 and PDF 1.0 (1993)

Adobe co-founder John Warnock conceived the Camelot Project in 1991 to solve the document-portability problem: a Word file looked different on every printer, every Mac, every Windows machine. PDF 1.0 shipped with Adobe Acrobat 1.0 in June 1993, embedding fonts and graphics in a single page-faithful container. The format was proprietary until 2008.

PDF 1.2 and Acrobat 3.0 (1996)

PDF 1.2 (1996) added forms, annotations, security features and crucially file-attachments and Unicode. This was the version that made PDF mainstream beyond design and pre-press. Acrobat Reader (the free viewer) shipped the same year, removing the barrier to opening PDFs for end users. By the end of the decade, PDFs were the default e-document.

PDF/A for archival (2005)

PDF/A, standardized as ISO 19005-1 in 2005, is a PDF subset designed for long-term archival. It forbids audio, video, JavaScript, encryption, and external font references; everything must be self-contained. Governments and libraries adopted PDF/A as the legal-archive format. The Library of Congress, US National Archives and EU institutions all accept PDF/A as digital preservation.

ISO 32000-1 opens the spec (2008)

In 2008, Adobe handed PDF to the ISO, where it became ISO 32000-1:2008. The format was now open: anyone could implement a PDF reader, writer or library without licensing Adobe. The change unlocked the modern ecosystem of PDF tools, including the browser-side libraries that power tools like this one.

jsPDF and pdf-lib bring PDF to the browser (2015 to 2017)

James Hall released jsPDF in 2015, the first widely-used pure-JavaScript PDF generator. Andrew Dillon released pdf-lib in 2017 with better support for embedded images and existing-PDF modification. Both libraries removed the need for server-side PDF generation, allowing browser-based tools like this one to assemble PDFs locally without uploading anything.

PDF 2.0 (2017) and ongoing evolution

PDF 2.0 (ISO 32000-2:2017) added associated files, native digital signatures with PDF, geospatial metadata and improved accessibility tagging. Future revisions continue to add features (electronic seals, accessibility improvements). For the basic case of bundling images into a portable document, PDF 1.4 (2001) already covers everything this tool produces, and the format is stable.

Practical workflows

Photographing receipts for expense reports

Snap a photo of each receipt on your phone, transfer to your computer, drop all into the converter, click Create PDF. Submit the single PDF to your finance department or upload it to Expensify, SAP Concur, or Brex. The PDF stays in receipt order even if your photo filenames are random IMG_5421.jpg style.

Building a photo album PDF

For a birthday, wedding or family vacation, select 20 to 50 of the best photos, drop into the converter, pick Fit to Image and Landscape if your photos are mostly landscape, then download. The resulting PDF is share-friendly via email or print-shop upload. For a polished book-style album, use Blurb or Mixbook instead; this tool is for quick portable collections.

Compiling screenshot evidence

When documenting a bug, a UX flow or a screenshot collection of an event, paste or drop the screenshots, reorder them in the order the user would experience, and create a PDF. Attach to a Jira ticket, send to a stakeholder, or archive for compliance. Fit to Image keeps the original screenshot dimensions; A4 or Letter adds white space around them for printing.

Signed agreement scans

For a contract printed, signed, and scanned page-by-page (or photographed on a phone), the converter joins all pages into a single PDF. Set page size to A4 or Letter to match the printed original, and use small or medium margins if the scans have margins of their own. The result is a single file to email back to the counterparty.

ID and passport scans for online forms

Visa applications, KYC forms, and account openings often require a PDF rather than separate image files. Photograph or scan both sides of your ID, drop into the converter, set Fit to Image to avoid cropping the document edges, and download. The browser-only processing ensures the sensitive ID images never touch a third-party server.

Recipe book or how-to guide

Photograph each recipe page from a magazine, organize into the order you want, and produce a personal PDF cookbook. Great for taking on a trip without lugging the magazine. Be aware of copyright; this works for personal use of content you legally own, not for redistributing copyrighted material.

Common pitfalls

Output file size grows fast with photos

Each high-resolution photo (12 MP from a phone) adds roughly 3 to 8 MB to the output PDF, depending on JPEG compression. A 50-photo album can land at 250 MB. If you need smaller files, compress each photo (use the image-compressor tool) before dropping into the PDF builder. PDF/A optimization in Acrobat Pro reduces file size further but is not available in this browser-only tool.

Transparent PNGs flatten on white

PNG transparency does not survive PDF embedding when the page background is white; transparent pixels become white. If you need transparency preserved (a watermark for example), use a tool that produces vector PDFs (Adobe Illustrator, Affinity Designer) rather than this bitmap-to-PDF flow.

EXIF orientation can rotate images unexpectedly

A photo taken in portrait mode on a phone is often stored as landscape with an EXIF orientation tag telling viewers to rotate it. Some PDF embedders ignore the tag, producing sideways pages. pdf-lib reads the EXIF and orients correctly, but if your output shows rotated images, fix the rotation in the source photo first (using Preview on Mac, Photos on Windows, or any image editor).

No OCR included

The PDFs produced are image-only: a screen reader, search index, or copy-paste cannot retrieve any text inside them. For searchable PDFs of scanned documents, run OCR via Adobe Acrobat Pro, ABBYY FineReader, or a free tool like Tesseract.js after creating the PDF. Plan for the extra step when accessibility or searchability matters.

No password or encryption

PDFs can be password-encrypted (40-bit, 128-bit, or 256-bit AES), but this tool does not offer encryption. If your scans contain sensitive content (medical records, financial statements, IDs) and will be emailed or stored on a shared drive, run the output PDF through a password tool (Acrobat, PDFsam, qpdf) before sharing. Or use end-to-end encrypted file transfer (Signal, ProtonMail).

Single-page PDFs lose their landscape orientation in Mail

Some email clients (older Outlook, certain webmail previews) render single-page PDFs as fixed-portrait thumbnails even if the page itself is landscape. The recipient still sees the right content when they open the file, but the preview can mislead. If the preview matters (cold-pitch attachment for example), use a portrait-oriented page or render the landscape image rotated to fit portrait.

Privacy and data handling

All conversion happens in your browser via pdf-lib. Your images are read into memory, embedded into the PDF locally, and written out as a blob for download. We do not upload your images to any server, do not log filenames or dimensions, and do not store anything in cookies or localStorage. Reload the page and the queued images are gone.

Once the page is loaded (including the pdf-lib library from jsDelivr), the tool works offline. This makes it safe for confidential receipts, sensitive ID scans, internal screenshots, and any image content that should never touch a third-party service. The pdf-lib bundle is served with a Subresource Integrity hash, so the library cannot be silently swapped.

When not to use this converter

Editing an existing PDF

This tool builds a fresh PDF from images. It cannot open an existing PDF and add pages, delete pages, reorder pages, or annotate. For PDF editing use Adobe Acrobat Pro, Foxit, or a free tool like PDFsam Basic. If your input is already a PDF, you do not need this converter.

Searchable text (OCR) PDFs

When you need a PDF whose text is selectable, copyable and indexable by search engines, run OCR after the conversion. Tesseract.js, Adobe Acrobat Pro's recognize-text feature, and ABBYY FineReader all add a hidden text layer over the image. This tool produces image-only PDFs, which are fine for archival but not searchable.

Form-fillable PDFs

Interactive PDF forms (text fields, checkboxes, dropdowns) need a dedicated PDF authoring tool (Acrobat Pro, LibreOffice Draw, JotForm). This converter only embeds images as flat content. If your end use is form filling, design the form in a real PDF editor and let the user type into it.

Very large batches (100+ images, 500 MB+)

The converter keeps everything in browser memory while building the PDF. Above 100 high-resolution photos or 500 MB total, the browser tab may slow or run out of memory. For huge batches, use a desktop tool (Acrobat, ImageMagick command line, or a Python script using PyPDF2 / Pillow) that can stream images to disk without loading everything into RAM.

More questions

PDF vs ZIP vs combined image, which is best?

PDF is best when the recipient needs a printable, paginated document (receipts, contracts, scans). ZIP is best when the recipient needs to extract and modify the originals (photo batch, source files). A combined long image (vertical stitch) is best for social media or chat where readers scroll, not flip pages. Pick based on whether each item should be its own page (PDF) or one continuous flow (image) or independent files (ZIP).

How big will my output PDF be?

Roughly the sum of your image file sizes plus a small overhead (a few KB per page). 10 photos at 2 MB each produce a roughly 20 MB PDF. The PDF format does not re-compress JPEG images, so output size scales linearly with input size. To shrink, compress images first with a tool like image-compressor or TinyPNG.

Is there a maximum number of images?

No hard limit. The browser comfortably handles 30 to 50 images at typical phone-photo resolution. Above 100, the tab may slow noticeably as the PDF is assembled. Above 500, expect to run out of memory in most browsers. For large batches split into multiple smaller PDFs (chapters, by month, by event).

Will image quality degrade?

For JPEG and JPG: no, the original compressed bytes are embedded as-is, so quality is identical to the source. For PNG: no, but the file size stays large because PDF does not have an internal PNG-style compression for color-rich images. For WebP: the tool converts to PNG for PDF compatibility, which is lossless but produces larger files than the WebP original.

Can I e-sign the resulting PDF?

Not in this tool. Open the downloaded PDF in DocuSign, Adobe Sign, HelloSign, or any e-signature service to add a signature. For a quick visual signature (not legally binding), Preview on macOS lets you draw a signature with the trackpad. For binding signatures with audit trails, use a dedicated e-signature platform.

Will phone camera scans work well?

Yes, but consider using a dedicated phone scanner app (Adobe Scan, Microsoft Lens, Apple Notes Document Scan) before this tool. They auto-detect document edges, correct perspective, and clean up shadows. Export each page as JPEG from the scanner app, then drop the JPEGs into this converter. The combined workflow produces cleaner PDFs than raw phone photos.

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