How to Convert Image to PDF (Free & Online)

Alex Chen Updated 2026-07-01 pdf-toolkitimage-conversion

Upload your images to PDF24 — free, no limits, works directly in your browser. For batch conversion of 20+ images, iLovePDF is faster with its drag-and-drop reordering.

Step-by-step

Choose an image-to-PDF converter

For unlimited free conversion with no file limits, PDF24 is the top choice — browser-based, open-source, and processes everything locally. For quick batch jobs, iLovePDF handles up to 20 images at once with drag-and-drop page reordering. SmallPDF offers a polished interface with 2 free tasks per day.

Upload your images

Drag and drop one or multiple images into the upload area. PDF24 accepts JPG, PNG, WEBP, HEIC, BMP, and TIFF — it runs entirely in your browser so nothing uploads to a server. iLovePDF supports the same formats but uploads to the cloud for processing, which means it works on slower devices.

Arrange page order if needed

If converting multiple images, iLovePDF lets you drag and drop to reorder pages before conversion — useful when combining photos into a document. PDF24 sorts by filename by default; rename files beforehand (01-cover.jpg, 02-page1.jpg) to control the sequence. SmallPDF also supports drag-to-reorder.

Click Convert and wait

Processing typically takes 2-5 seconds for a single image or 5-10 seconds for a batch of 10 images. PDF24 processes locally so speed depends on your device — a 50-image batch may take 30 seconds on an older laptop. Cloud tools like iLovePDF finish faster regardless of file count.

Download the PDF

Click the download button to save your PDF. iLovePDF shows the final file size before downloading. PDF24 opens the PDF in its built-in viewer where you can also merge, split, or compress before downloading. If the PDF is too large, use PDF24's compress function to shrink it.

Check image quality in the PDF

Open the downloaded PDF and zoom to 200% on each page. Confirm that text in screenshots remains readable and photos are not pixelated. PDF24 preserves original image resolution — no compression is applied during conversion. If quality looks wrong, re-upload the original higher-resolution image.

Recommended Tools

PDF24

Fully free, unlimited conversions, processes locally for privacy, supports 10+ image formats

82 /100

iLovePDF

Best for batch conversion with drag-and-drop reordering, supports up to 20 images per task

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Smallpdf

Clean interface with preview, 2 free tasks per day, good for occasional use

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FAQ

How do I convert multiple images into one PDF?

Upload all images to PDF24 at once — it combines them into a single PDF in order. For more control over page order, use iLovePDF which supports drag-and-drop reordering before conversion.

Can I convert HEIC to PDF on a computer?

Yes — PDF24 accepts HEIC files directly in your browser. You can also convert HEIC to JPG first using CloudConvert, then to PDF.

Is there a free limit for image-to-PDF conversion?

PDF24 has no limits at all — unlimited conversions, no signup, no watermarks. iLovePDF allows 2 free batch tasks per day. SmallPDF also offers 2 free tasks daily.

Does converting image to PDF reduce quality?

No — PDF24 preserves the original image resolution inside the PDF. The file size increases because the PDF format adds structural overhead. Use PDF24's compress tool afterward if you need a smaller file.

How do I convert a screenshot to PDF?

Save your screenshot as PNG or JPG, then upload to PDF24. For Mac users, screenshots save to Desktop by default. For Windows, they go to Pictures > Screenshots. On mobile, share the screenshot directly to your browser and upload.

Can I convert images to PDF on my phone?

Yes — PDF24 and iLovePDF both work in mobile browsers. Open the tool URL in Safari or Chrome, upload from your photo library, and download the PDF.

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