How to Convert Images to PDF Free — JPG, PNG, Screenshots (2026)
Need to turn a photo, screenshot, or stack of scanned pages into a PDF — without uploading anything or creating an account? Here's everything you need to know, including which page size to pick and why some formats need an extra step.
Quick Answer
- Drop your images (JPG, PNG, or WebP)
- Drag to reorder pages if needed
- Choose page size: A4, Letter, or Fit to Image
- Click Convert — the PDF downloads instantly
No upload. No sign-up. Up to 200 images per batch. Works on phone or desktop.
Convert Images to PDF Free →The 4 Most Common Reasons People Need Images as PDF
Most PDF converters exist for one of four real-world situations. Knowing which one applies to you also tells you which page size and settings to use.
1. Phone-scanned documents sent to someone who needs PDF, not JPG
You photographed a contract, receipt, passport, or insurance card with your phone. The other party — a landlord, HR department, bank — asks for PDF. Converting the JPG to PDF takes under 30 seconds and keeps the document looking exactly as photographed.
2. Multiple screenshots of a multi-page confirmation or form
Order confirmations, booking emails, or online forms that span several screens are annoying to share as a folder of numbered screenshots. Combining them into a single PDF makes them easy to email, archive, or print in order.
3. Product photos into a single presentation document
Freelancers, sellers, and designers frequently need to bundle product or portfolio images into a PDF to send to a client. The Fit to Image page size is ideal here — each photo fills its page without borders or padding.
4. Scanned homework or assignments for portals that only accept PDF
Many school and university submission portals reject JPG or PNG files. Photographing handwritten work with a phone and converting the images to PDF is now the standard workflow for students.
A4, Letter, or Fit to Image — Which Page Size to Choose
The tool offers three page sizes that match different use cases. The right choice depends on where the PDF will be read or printed.
| Page size | Dimensions | Best for |
|---|---|---|
| A4 | 210 × 297 mm | Documents shared internationally — contracts, reports, passports |
| Letter | 8.5 × 11 in | US documents — forms, homework submissions, US business docs |
| Fit to Image | Matches each image | Screenshots, product photos — no borders, no wasted space |
When in doubt: use A4 for anything going to a European or Asian recipient, Letter for US recipients, and Fit to Image whenever you want the PDF to look like the image itself with no extra whitespace around it.
How to Convert Images to PDF (Step by Step)
- 1
Drop your images into the tool
Go to SimpleTool's Image to PDF converter and drag your JPG, PNG, or WebP files onto the drop zone — or click to browse. You can add up to 200 images at once.
- 2
Drag to reorder the pages
Each image appears as a card in the list. Use the drag handle on the left side of any card to reorder it. The final PDF will follow this exact sequence.
- 3
Choose a page size
Select A4, Letter, or Fit to Image depending on your use case. A4 and Letter centre the image on a standard page with optional margins. Fit to Image creates a page exactly the size of each image.
- 4
Click Convert and download
Click the Convert button. pdf-lib builds the PDF entirely in your browser — no server involved. The download starts automatically when it is ready.
What Image Formats Work?
Not every image format goes straight into a PDF. Here's what to expect from the formats you're most likely to have.
- JPG / JPEG — fully supported, embedded directly with no quality loss or re-encoding.
- PNG — fully supported, embedded directly. Transparent backgrounds are preserved.
- WebP — supported, but re-encoded to JPEG at 92% quality before embedding. This is necessary because the PDF format does not natively support the WebP codec.
- HEIC / HEIF (iPhone camera default) — not directly supported. Convert to JPG first using SimpleTool's HEIC to JPG converter, then use the resulting JPG files here.
- GIF / TIFF — not directly supported. Save or export as JPG or PNG first.
Why Not Just Print-to-PDF from the Browser?
Browsers include a print-to-PDF option, but it has significant drawbacks that make it a poor choice for image conversion:
- Headers, footers, and the page URL are printed on every page by default. Removing them requires digging into print settings and they still appear in some browsers.
- Only one image at a time. To combine five screenshots you would need to open each one in the browser, print it, and manually merge five PDFs.
- No control over page order. The browser decides how the image fits on the page — you cannot choose A4 vs Letter vs fit-to-image.
- Unpredictable margins. Browser print margins vary by browser and OS setting. The image may be cropped or float on a large white border.
SimpleTool's converter uses pdf-lib, a pure JavaScript PDF creation library, to embed images directly into a proper PDF structure. There are no browser print dialogs, no headers, and full control over page dimensions and image placement.
Are My Photos Uploaded?
No. The conversion runs entirely inside your browser using pdf-lib, a JavaScript library that assembles PDFs locally. Your image files never leave your device — they are not sent to any server, not stored anywhere, and not seen by anyone else.
This matters most when your images contain sensitive content: a photo of your passport or national ID, a screenshot of a bank statement, a medical result, a signed contract, or tax documents. Uploading those to an external service — even one that promises deletion after processing — means the data transits someone else's infrastructure.
You can verify the tool works offline: after the page has loaded, disconnect from the internet and try converting an image. The PDF still downloads successfully because nothing about the conversion requires a network connection.
FAQ
Can I combine 50 screenshots into one PDF?
Yes. The tool supports up to 200 images per batch. Drop all your screenshots at once, drag them into the order you want, and download a single PDF with every image on its own page.
Does the image quality change when converting to PDF?
For JPG and PNG files, the image data is embedded directly into the PDF without any re-encoding — quality is unchanged. WebP images are re-encoded to JPEG at 92% quality before embedding, because the PDF format does not natively support WebP. The difference is not visible at normal viewing sizes.
Can I change the order of pages?
Yes. After dropping your images, each card shows a drag handle on the left side. Grab the handle and drag the card up or down to reorder pages before you convert. The PDF is built in the order you see on screen.
Does the image-to-PDF converter work on mobile?
Yes. The tool runs entirely in the browser, so it works on iOS and Android. You can tap to select images from your photo library or files app, reorder them by dragging, and download the PDF directly to your device.
Is there a file size limit?
There is no hard size limit enforced by the tool — the constraint is your device's available RAM. Very large batches of high-resolution photos may slow down older devices. As a practical guide, 200 typical phone photos work fine on any modern device.
Do I need to sign up or create an account?
No. The tool is completely free to use without any sign-up, account, or email address. Open the page, drop your images, and download your PDF.