How does the image to PDF converter work?

The tool uses pdf-lib, a JavaScript library for creating PDF documents, to embed your images into PDF pages. Each image is placed on its own page (or arranged in a grid if you choose 2-up or 4-up layout), scaled to fit within the margins while preserving its aspect ratio. Everything runs locally in your browser — no files are uploaded to any server.

What image formats are supported?

You can upload JPEG, PNG, and WebP images. WebP images are automatically converted to PNG format internally before being embedded in the PDF. Each file can be up to 20 MB, and you can add up to 50 images at once.

Can I change the page size and orientation?

Yes. Choose from A4 (default), US Letter, or Auto-fit (where each page matches the image dimensions). Orientation can be set to Portrait, Landscape, or Auto (which picks the best orientation based on each image's aspect ratio).

What are the layout options?

Single places one image per page — the simplest and most common option. 2-up puts two images per page in a vertical stack. 4-up arranges four images per page in a 2x2 grid. Grid layouts are great for contact sheets or saving paper when printing.

Can I customize the margins?

Yes. Quick presets for None, Small, and Normal margins are available as one-click buttons. You can also drag the slider to set any custom margin from 0 to 50 millimeters. The preset buttons highlight automatically when the slider matches their value.

Completely. This converter runs 100 percent in your browser using JavaScript. Your images are never uploaded to any server. No data leaves your device, there is no signup required, and no files are stored anywhere.

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What Image to PDF Does

Need to turn a batch of photos into a single, shareable PDF? Maybe you are compiling receipts for an expense report, assembling a portfolio of design work, or packaging screenshots into a document for a client. Whatever the reason, this tool takes your JPEG, PNG, and WebP images and combines them into one polished PDF file — with full control over page size, orientation, layout, and margins.

Everything runs 100% in your browser. Your images are never uploaded to any server. The conversion happens locally using pdf-lib, a JavaScript library for creating PDF documents, which means your files stay on your device from start to finish. There is no signup, no account, no daily usage cap, and no watermark on your output.

How It Works

Getting from images to a finished PDF takes just a few steps.

1. Add your images. Drop files into the upload area or click to browse your device. The tool accepts JPEG, PNG, and WebP formats. You can upload up to 50 images at once, with each file up to 20 MB in size. WebP files are automatically converted to PNG internally before being embedded in the PDF. As images load, each one appears in a list showing a thumbnail preview, the file name, pixel dimensions, and file size.

2. Arrange the order. Use the up and down arrow buttons next to each image to move it earlier or later in the sequence. If you added something by mistake, the remove button (the X icon) takes it out. You can also click Add More at the top of the list to bring in additional images, or Clear All to start over.

3. Configure your settings. Four settings panels let you fine-tune the output:

Page Size — Choose A4 (international standard), Letter (US standard), or Auto-fit, which sizes each page to match the image dimensions. Note that Auto-fit is only available in Single layout mode.
Orientation — Pick Portrait, Landscape, or Auto. The Auto option looks at each image’s aspect ratio and selects whichever orientation fits best.
Layout — Single places one image per page. 2-up stacks two images vertically on each page. 4-up arranges four images in a 2x2 grid. Grid layouts are ideal for contact sheets or saving paper.
Margins — Quick presets for None, Small, and Normal are available as one-click buttons. For finer control, drag the slider to set any custom margin from 0 to 50 millimeters. The preset buttons highlight automatically when the slider matches their value.

4. Generate and download. Click the Generate PDF button. The tool builds your document in seconds, then displays a success panel showing the page count and file size. Click Download PDF to save the file to your device.

Why Use Our Image to PDF Converter

Most online image-to-PDF tools upload your files to a remote server, process them there, and send the result back. That means your personal photos, financial documents, or confidential screenshots pass through someone else’s infrastructure. This converter does not work that way.

True privacy. No server upload. No cloud processing. Your images stay on your machine the entire time.
No account required. Open the page and start converting. There is nothing to sign up for and no email to hand over.
No limits or watermarks. Convert up to 50 images per batch, as many times as you want, with clean output every time.
Flexible formatting. Most free converters give you one layout and one page size. Here you get three page sizes, three orientations, three layout modes, and a full margin slider — enough to handle everything from a quick one-pager to a printed contact sheet.
Fast and lightweight. Because the tool runs locally in your browser, conversion speed depends on your own hardware rather than a server queue. Most batches finish in seconds.

Use Cases

Expense reports and receipts. Photograph your receipts, drop them in, arrange them chronologically, and generate a single PDF to attach to a reimbursement form. One file instead of a dozen loose images.

Photography portfolios. Compile your best work into a PDF you can email to clients or print at home. Use the Single layout for full-page impact, or 2-up to show comparison pairs side by side.

Real estate and property listings. Package property photos into a clean document for clients, agents, or internal records. Auto orientation ensures vertical and horizontal shots each get the right page rotation.

School and university assignments. Combine scanned homework pages, lab photos, or hand-drawn diagrams into one submission file. Many learning management systems accept PDF uploads more reliably than batches of images.

Design mockups and wireframes. Export your screens as PNGs, load them in order, and share a single PDF with stakeholders. The 4-up grid layout works well for presenting multiple states or screen variations at a glance.

Legal and compliance documentation. Scan signed contracts, IDs, or notarized pages and merge them into a unified document. Since nothing leaves your browser, this is a practical option for sensitive paperwork.

Tips and Best Practices

Choose the right layout for your audience. Single layout is best when each image needs to be seen at full size — think portfolios, presentations, or detailed screenshots. Grid layouts (2-up and 4-up) shine when you want an overview or need to conserve pages for printing.

Use Auto orientation for mixed batches. If your images include both landscape and portrait shots, set orientation to Auto. The tool will rotate each page individually so every image displays upright and fills the available space.

Optimize your images before converting. The PDF file size is largely determined by the size and format of the source images. If you need a smaller PDF, consider compressing your images first — EasyWebTools has an Image Compressor that can reduce file sizes before you bring them here.

Set margins to None for edge-to-edge prints. If you plan to print the PDF and want images to reach the paper edge, set margins to 0 mm. Keep in mind that most home printers have a non-printable border, so a small margin (5-10 mm) often produces cleaner results in practice.

Preview your page count before generating. The Generate button shows exactly how many images will be included. In grid mode, the tool calculates the total page count automatically — for example, 10 images in 4-up mode produces 3 pages. Use this to estimate output before committing.

Frequently Asked Questions

How does the image to PDF converter work?: The tool uses pdf-lib, a JavaScript library for creating PDF documents, to embed your images into PDF pages. Each image is placed on its own page (or arranged in a grid if you choose 2-up or 4-up layout), scaled to fit within the margins while preserving its aspect ratio. Everything runs locally in your browser — no files are uploaded to any server.
What image formats are supported?: You can upload JPEG, PNG, and WebP images. WebP images are automatically converted to PNG format internally before being embedded in the PDF. Each file can be up to 20 MB, and you can add up to 50 images at once.
Can I change the page size and orientation?: Yes. Choose from A4 (default), US Letter, or Auto-fit (where each page matches the image dimensions). Orientation can be set to Portrait, Landscape, or Auto (which picks the best orientation based on each image's aspect ratio).
What are the layout options?: Single places one image per page — the simplest and most common option. 2-up puts two images per page in a vertical stack. 4-up arranges four images per page in a 2x2 grid. Grid layouts are great for contact sheets or saving paper when printing.
Can I customize the margins?: Yes. Quick presets for None, Small, and Normal margins are available as one-click buttons. You can also drag the slider to set any custom margin from 0 to 50 millimeters. The preset buttons highlight automatically when the slider matches their value.
Is my data private?: Completely. This converter runs 100 percent in your browser using JavaScript. Your images are never uploaded to any server. No data leaves your device, there is no signup required, and no files are stored anywhere.