Scan documents to PDF with your phone camera

The short version

1. Photograph each page flat, in soft daylight, with the phone held straight above it and the page filling the frame.
2. Check each photo by zooming in on the smallest print. Retake any that are blurry or shadowed.
3. Make one PDF in JPG to PDF: choose the photos, put them in order, pick A4 and a Small margin, and convert.
4. Make it small enough for the website or email, with Resize PDF or our compressor.
5. Check once more and upload.

The photo is the whole scan: our converter puts each photo into the PDF exactly as it is, so a good photo makes a good page. That is why most of this article is about taking the photo.

Before you shoot: paper, surface and light

Wipe the camera lens. Phones live in pockets, and a greasy lens makes every page look hazy. A quick wipe with a soft cloth is the cheapest fix there is.

Flatten the paper. Unfold it fully and press out the creases. A page that was folded in three can rest under a heavy book for a few minutes. Curled paper bends the lines of text and casts small shadows along the folds.

Choose a plain, dark surface. A dark table, a file cover or a dark cloth makes the white page stand out, so its edges are clear. Avoid patterned bedsheets and wood grain, which compete with the text.

Use soft daylight. The best light is daylight near a window, but not direct sun. Indoors at night, use the brightest room light you have, and place the page so the light comes from one side, not from right behind you, or your own shadow falls across it.

Skip the flash. A flash leaves a bright patch in the middle of the page and can wipe out the text under it. Glossy paper, photographs and laminated cards are the worst for this. If you see a shiny patch, move the page or the light, not the angle of the phone.

Taking the photo

• Hold the phone straight above the page. Not at an angle: a tilted phone makes the far end of the page narrower than the near end, and the lines slope. Many camera apps can show grid lines on the screen; turning them on in the camera's settings helps you line up the page edges.
• Fill the frame with the page, leaving only a thin border of table around it. Move the phone closer rather than zooming in, which on many phones just enlarges part of the picture.
• Tap the screen on the text to focus there, then hold still. Rest your elbows on the table if your hands shake.
• Keep your shadow and fingers off the page. To hold a curling page down, put your fingers on the table side of the edge, or weigh the corners with coins.
• Use the normal photo mode. Portrait mode, beauty filters and colour effects are made for people and scenes, and can blur or tint parts of the page.
• Shoot the pages in order, page 1 first. Your photos then sort the right way by themselves, which saves dragging later.

Check before you put the paper away. Open each photo and zoom in on the smallest print: roll numbers, dates, stamps, signatures. If you can't read it on your phone, nobody else will. Retaking a photo now takes seconds; finding the paper again next week may not.

What our tool won't fix, and what will

To be clear about it: JPG to PDF doesn't crop, straighten or clean up photos. It doesn't find the page's edges, doesn't turn a slanted page into a neat rectangle, and doesn't whiten grey paper. It also has no text recognition (OCR), so the words in your PDF are part of the picture: you can read them, but you can't search or copy them. It puts each photo into the PDF exactly as you took it, at full quality, and that is all.

If your photos need more than a careful shot, these can help:

• Your gallery's edit tools. The Photos app on iPhone and most Android gallery apps can crop a photo and straighten a slightly tilted one. Cropping away the table also makes the photo, and so the PDF, smaller.
• The iPhone's built-in scanner. The Notes app and the Files app on iPhone have a Scan Documents option. It finds the page's edges, crops away the table, straightens a slanted page and can save the result as a PDF.
• Scanning in the Google Drive app on Android. Drive has a scan option that also finds and crops the page. The result is saved to your Google Drive, which means it is stored online in your Google account.
• Document modes in camera apps. Some Android phones' camera apps notice a document and offer to crop it. Look in your camera's modes or settings.

These work well, and you can combine them with our tools. If a scanner app saved a PDF, you can still join it with other PDFs in Merge PDF, or make it fit a size limit with Resize PDF, all on your phone. If it saved pictures, bring them to JPG to PDF.

Turning the photos into one PDF

Open JPG to PDF in Safari on an iPhone or Chrome on Android and tap Choose pictures. Then, for documents:

• Page size A4, unless the form asks for something else. It is the usual paper size in India and most countries. Use Letter in the USA and Canada.
• Margin Small. It keeps the edges of the page safe if someone prints it.
• Direction Auto, so a sideways certificate gets a sideways page.
• Make One PDF, unless the form wants each document as its own file. A PDF each then gives you a ZIP with one PDF per photo.

Check the order on the cards, turn any sideways card, then convert. Open the PDF and zoom in on names and numbers once more. The guide's step by step for a form lists the same path from paper to upload, and converting photos on your phone has every tap for iPhone and Android, including what happens to iPhone HEIC photos.

Front and back on one page? The converter puts one picture on each page, so the two sides of a card become two pages. If a form insists on both sides on one page, put the two photos side by side in a collage or photo editing app first, save that as one picture, and convert it.

Your location stays private. Photos taken at home carry hidden notes, often including where they were taken. These notes are left out of the PDF, and the result tells you when that happened.

Making it small enough for uploads

Photos from a phone camera are often several MB each, and our converter keeps them at full quality, so even a few pages make a PDF of many MB. Many job, exam, college and government portals want far less: 100 KB, 200 KB, 500 KB or 2 MB. Pick the tool by the kind of limit:

What to expect at 100 KB. Our tests used scanned PDFs, which are made of pictures just like a PDF of document photos. A 6-page colour scan of 6.37 MB came out at 91 KB for a 100 KB limit, with its pictures at 48 pixels per inch: normal text was still readable, though soft. A 4-page grayscale scan of 6.76 MB came out at 98 KB, at 57 pixels per inch, where text read easily. Each Resize PDF result tells you in one word (Sharp, Good, Readable or Rough) how sharp the pictures stayed, and the Resize PDF results list more files.

What to expect from the compressor. At its Recommended level, the same 6-page colour scan went from 6.37 MB to 1.48 MB, and the grayscale scan from 6.76 MB to 0.98 MB. That suits email and chats, where there is no fixed number to meet.

When a small limit makes the text rough:

• Send only the pages asked for. All the pages share one limit, so a blank back side or an extra copy steals room from the pages that matter.
• Fill the frame when you shoot. A page with less table around it gives more of the limit to the words.
• Take the photos in good light. Shadows and the grain of a dim photo take up room the text could use.
• Start from the original each time. Keep your full-quality PDF or photos, and make each smaller copy from them, not from a copy that was already shrunk.

Examples: common documents, start to finish

Marksheets for a college or exam portal

Say the portal wants your Class 10 and Class 12 marksheets as one PDF under 200 KB. Photograph each marksheet flat, in daylight, and check the marks and roll number are readable when you zoom in. Convert both photos on A4 with a Small margin, Class 10 first. Then pick 200 KB in Resize PDF. If the portal wants each marksheet separately, choose A PDF each, and resize each file.

Aadhaar or PAN card, front and back

Cards are small and often laminated, so glare is the main enemy: turn off the flash and keep lamps out of the reflection. Get close, so the card fills most of the frame. Two photos make a two-page PDF, front first. Because nothing is uploaded, your ID copies never sit on a stranger's server.

A rent agreement or bank papers

Long documents need the order to be right. Shoot in page order, check the numbers on the cards, and look at the last page too, where signatures usually are. For email, put the PDF through the compressor; Gmail takes attachments up to 25 MB and sends bigger files as a Google Drive link.

Receipts for an expense claim

Receipts are long and narrow, and many are printed on paper that fades over time. Photograph them soon after you get them, flat and in good light. A4 pages keep them all the same size for printing, with white space beside each narrow receipt.

Handwritten homework or notes

Pencil is faint, so light matters even more here. Shoot every page from straight above, in order, and convert on A4 with a Small margin, so the teacher can print it if they want.

Check before you upload

• Every page is there, including back sides that carry anything written.
• The order is right, as the form lists the documents.
• Every page is upright. If one isn't, turn it with Rotate PDF, which turns the page without drawing it again.
• Small print is readable when you zoom in, especially after making the file smaller.
• The file is under the limit. Resize PDF counts 1 KB as 1,000 bytes, so its result fits every website's limit.
• The name makes sense, like "Ravi-Kumar-certificates.pdf" rather than IMG_2041-4-pages.pdf.
• Nothing extra is in the frame, like another person's papers lying on the same table.

Keep your photos and the full-quality PDF afterwards. The next form will have a different limit, and starting from the originals gives the clearest result every time.