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How to Convert Images to PDF on iPhone & Android — Free

By DocFila Team · February 13, 2026 · 4 min read

You took a photo of a whiteboard, a receipt, or a signed form — and now someone needs it as a PDF. Converting images to PDF is one of the most common everyday tasks, yet many people still email raw photos or screenshots instead. A proper PDF looks more professional, is easier to read, and keeps multiple pages in a single file.

Why Convert Images to PDF?

Images and PDFs serve different purposes. Here is why PDF is often the better format for sharing documents:

• Professional presentation. A PDF with proper margins looks polished. A raw camera photo looks like what it is — a quick snapshot.
• Multi-page documents. Five images are five separate files. A PDF combines them into a single document with numbered pages.
• Universal compatibility. PDFs render identically on every device and operating system. Images can display differently depending on the viewer.
• Smaller file size. A well-compressed PDF is often smaller than the original images, making it easier to email and store.
• Security. PDFs support password protection and restricted editing. Images do not.
• Searchability. When you convert images to PDF with OCR, the text becomes searchable and selectable.

How to Convert Images to PDF With DocFila

Step 1 — Open the Converter

Launch DocFila and navigate to the PDF Tools section. Select "Image to PDF" to open the converter.

Step 2 — Select Your Images

Tap "Add Images" to select photos from your camera roll, Files app, or cloud storage. DocFila supports all common image formats:

• JPG / JPEG — the most common photo format
• PNG — commonly used for screenshots and graphics
• HEIC / HEIF — the default format on modern iPhones
• BMP — older bitmap format still used in some workflows
• TIFF — high-quality format used in professional photography and printing

You can select multiple images at once for batch conversion.

Step 3 — Arrange and Edit

After importing, you see a thumbnail view of all selected images. From here you can:

• Reorder pages: Drag and drop thumbnails to change the page sequence.
• Rotate: Rotate individual images 90° clockwise or counterclockwise.
• Crop: Trim edges to remove unwanted borders or background.
• Delete: Remove images you no longer need in the PDF.
• Add more: Tap the "+" button to add additional images at any point.

Step 4 — Choose Quality Settings

DocFila offers three quality presets to balance file size and image clarity:

• High (Print Quality): 300 DPI, minimal compression. Best for documents you plan to print. Larger file size.
• Medium (Email): 150 DPI, moderate compression. Good balance of quality and size. Ideal for email attachments.
• Low (Web): 72 DPI, higher compression. Smallest file size. Best for uploading to websites or forms with size limits.

Step 5 — Convert and Export

Tap "Convert" and DocFila generates your PDF in seconds. From the export screen, you can:

• Save to your device
• Share via email, WhatsApp, Slack, or any messaging app
• Upload to iCloud, Google Drive, Dropbox, or OneDrive
• Store in the Secure Vault

Batch Conversion Tips

When converting many images at once, keep these tips in mind:

1. Sort images before importing. Rename files or sort by date so they appear in the correct order.
2. Use consistent orientation. Rotate all images to the same orientation (portrait or landscape) before converting for a uniform PDF.
3. Group related images. Convert related images into one PDF rather than creating separate files. For example, all pages of a single document should be one PDF.
4. Compress afterward if needed. If the resulting PDF is too large, use DocFila's PDF compression tool to reduce the file size.

File Size Guide

Understanding file sizes helps you choose the right quality setting:

• A single iPhone photo (12 MP, HEIC) is approximately 2–4 MB
• That same photo in a high-quality PDF: approximately 1–3 MB per page
• Medium quality: approximately 300–800 KB per page
• Low quality: approximately 100–300 KB per page

Most email providers limit attachments to 25 MB. At medium quality, you can fit approximately 30–80 pages in a single PDF under the email limit.

Adding OCR to Your Image PDF

If your images contain text — such as photos of documents, receipts, or book pages — you can run OCR after conversion to make the text selectable and searchable. This is especially useful for creating searchable archives of paper documents. Learn more in our document scanning guide.

Convert Your Images Now