How to Make a PDF on Mobile
Published: November 10, 2026
Source: Google Drive Help & your phone's built-in scanner
Turn photos or documents into one clean PDF using only your phone — no computer needed.
Before you start
- Keep the papers or photos you want in the PDF ready — place the first page on a flat surface in good light, and have the rest of the pages nearby in the order you want them.
- Check that your scanner app shows a “Scan” or camera button on its home screen before you start — if it asks you to sign in or pay before you can scan even one page, close it and try a different free app instead.
- Make sure the app has permission to use your camera — it will ask when it opens, so tap “Allow” or it cannot take photos of your pages.
Open a PDF maker app
You do not need a computer or a paid app for this. Most phones already have a free scanner built in: on iPhone, open the Notes app and tap the camera icon, then choose "Scan Documents"; on Android, open the Google Drive app, tap the "+" button, and choose "Scan". If you prefer a separate app, any free scanner app from your app store will do the same job.
When the app opens, it will ask for permission to use your camera — tap "Allow" so it can take photos of your pages. Before you start, check that the app shows a "Scan" or camera button on its home screen. If the app asks you to sign in or pay before you can scan even one page, close it and try a different free app instead.
Add your pages
Place the first page on a flat surface in good light, and hold your phone steady above it so the whole page fits inside the frame on screen. Most scanner apps find the edges of the page by themselves and take the photo automatically; if yours does not, tap the round shutter button yourself. Then move to the next page and repeat the same thing until all your pages are added.
If you already have photos of the pages in your gallery, you do not need to take new ones. Look for an "Import" or "Choose from gallery" button in the app, pick your photos, and check that they appear in the right order. The number at the corner of each page tells you its place in the file — if a page is out of order, you will fix it in the next step.
Clean and arrange
Tap a page to open it. You will see tools to crop the edges, rotate the page, and change the brightness. Drag the corners of the crop box so only the page is inside the frame — this cuts out the table or your fingers from the photo. If a page is upside down or sideways, tap the rotate button until the text reads the right way up.
Now look through all your pages one by one. Check that every page is readable and that no page is blurry or cut off. If two pages are in the wrong order, press and hold a page and drag it to its correct place. Only move on when you are happy with every page, because fixing a finished PDF takes longer than fixing it now.
Save and share as PDF
When your pages look right, tap "Done", "Save", "Export", or the share icon — the exact word depends on your app. Choose "PDF" as the file type if the app asks. The app will then show you where the PDF is saved, usually in your Files app or in the app itself. Give the file a clear name, like "Aadhaar-Copy" or "School-Form", so you can find it again later.
To send the PDF, tap the share icon and pick WhatsApp, email, or any other app. Before you send it to someone important, open the PDF once and check that all pages are there and readable. If you made this PDF for an official application, for example a passport application, check the file size too — many portals have a size limit, and a PDF made from many photos can get large.
Tips
- Keep the paper flat and shoot in good light for a clear scan — a shadow across the page is the most common reason a scan looks bad.
- Use a plain, dark surface under a white page so the app can find the edges easily.
- Scan one page at a time instead of rushing through all of them — a steady, straight photo saves you from redoing the whole file.
Keep in mind
- Check the file size before uploading it to a portal — many portals have a limit, and a PDF made from photos can be bigger than you expect.
- Some free scanner apps add a watermark or ask you to pay for a clean, full-quality export — check the finished PDF before you share it.
- Do not upload scans of your ID, bank, or personal documents to a random website or app you do not trust — use your phone's built-in scanner when you can.
- Always open the finished PDF and check every page before you send it — a missing or upside-down page is easy to miss on the small preview.
FAQs
Is it free?
Yes — the built-in tools on most Android and iPhone models make PDFs for free, and there are free scanner apps too. Some apps charge for extra features like removing watermarks or scanning many pages at once, but a simple PDF costs nothing.
Can I merge two PDFs?
Yes, most scanner apps have a Merge option for combining files. Open the app, look for "Merge" or "Combine PDF" in the menu, pick the two files in the order you want them, and save the result as a new PDF.
Why is my PDF file so big?
Photos of pages make large files, and the more pages you add, the bigger the PDF gets. Many scanner apps have a quality or size setting — choosing a lower quality makes a smaller file. If a portal rejects your file for being too big, try re-saving it at a lower quality and check it is still readable.
What if a page comes out blurry or cut off?
Go back to that page in the app, delete it, and scan it again with the paper flat, in better light, holding the phone steady. Do not try to fix a very blurry page with filters — a fresh scan is quicker and looks better.
