Scan to PDF Online - Turn Phone Photos into One PDF

Phone photos of a document, as one PDF

Jobsixo's Scan to PDF turns photos of paper into a single PDF, one photo per page, in the order you set. You take the pictures with your phone camera or any scanner app, add the files here, and press one button. It is a simple way to make a PDF from camera photos when a portal, a college or an employer asks for a document and all you have is a gallery full of JPG files.

Be clear about what it is. This phone scan to PDF tool is not a camera or a scanner app: it does not capture pictures, straighten a crooked page or sharpen faint print. It takes finished pictures and places each one on a proper sheet of paper. That narrow job is why it works reliably for marksheets, identity cards, receipts and signed letters.

How to make a PDF from photos, step by step

1. 1
   Photograph or scan each page in good, even light, with the page filling most of the frame and no shadow across it.
2. 2
   Drop the pictures on the box that says Drop files here, or click to browse. JPG, PNG, WebP and AVIF files are accepted, and you can mix them. Add more at any time.
3. 3
   Put the list in reading order. The arrows beside each file move it up or down, rows can be dragged, and the X removes a file. The list order is the page order.
4. 4
   Choose the settings: Page size, Orientation, Margin (pt), and Give me. The next section explains them.
5. 5
   Press Build PDF. Under Done, download images.pdf, or one PDF for each picture if you chose that. When there are several files, Download all as a ZIP collects them.

The settings, and what each one does

The defaults are chosen for portals that expect ordinary A4 paper, so most people can leave them alone. Change them only when you have a reason.

• Page size: A4 (most portals), US Letter, Legal, or Fit page to the image. A4 is 595 by 842 points, or 210 by 297 mm.
• Orientation: Match the image places wide pictures on a landscape sheet and tall ones on a portrait sheet. Portrait and Landscape force one orientation for every page. This is ignored when the page size is Fit page to the image.
• Margin (pt): white space around the picture, in points. 72 points is one inch, the default is 24, and 0 runs the picture to the edge of the sheet.
• Give me: One PDF with every image, or A separate PDF for each image. The second suits certificates that go to different forms. With two or more pictures, each file is named after its photo, so marksheet.jpg becomes marksheet.pdf.

The picture is always fitted whole. It is scaled to fit inside the margins and centred, never cropped, so every edge of what you photographed stays on the page.

A worked example with real numbers

A current phone photo is often 3024 by 4032 pixels. Placed on A4 portrait with the default margin of 24 points, the drawing area is 595.28 - 48 = 547.28 points wide and 841.89 - 48 = 793.89 points tall. The photo is scaled by the smaller of the two ratios, 547.28 / 3024 = 0.181 for width and 793.89 / 4032 = 0.197 for height, so the width is the limit.

The photo height is 4032 x 0.181 = 729.7 points, which leaves (841.89 - 729.71) / 2 = 56.09 points of white above and below. The resolution is 3024 pixels over 7.60 inches, close to 398 per inch, more than enough for a legible printout. If the same photo is taken sideways at 4032 by 3024 and the orientation is left on Match the image, the sheet turns landscape at 841.89 x 595.28 points and the picture lands at the same 729.71 x 547.28 size.

How the engine builds the file

The page is built by pdf-lib. For each picture the tool decides whether pdf-lib can embed it as it is. JPG and PNG files can: a JPG goes into the PDF byte for byte, with no second round of compression, and a PNG is embedded losslessly. WebP and AVIF cannot, so the browser decodes them onto a canvas over a white background and saves a JPEG at 92 per cent quality, which then goes in.

Each picture then gets its own new page of the chosen size. Without this step, a 3024 by 4032 photo would become a page 42 inches by 56 inches, which many upload forms refuse. On a normal paper size, the picture arrives on a sheet that prints and previews as expected. With Fit page to the image the page is sized to the picture at 96 pixels per inch, so 3024 by 4032 pixels becomes 2268 x 3024 points, and the margin still applies inside that page.

Choosing a page size

Stay with A4 unless the recipient says otherwise. Indian portals, colleges and government offices work in A4, which is 8.27 by 11.69 inches. US Letter (8.5 by 11 inches) and Legal (8.5 by 14 inches) exist for applications to American institutions and for documents that will be printed on that paper.

Fit page to the image makes the page as large as the picture. It is the right choice for a single visiting card, a small ID or a receipt, where an A4 sheet would be mostly white space. Remember that the margin still applies inside such a page, so a margin of 24 points shrinks the picture a little. With the 3024 by 4032 photo above, the page is 2268 x 3024 points and the drawing area is 2220 x 2976, so the picture is scaled by 2220 / 3024 = 0.734 and ends up 2220 x 2960 points. Set the margin to 0 when you want the picture to fill the page exactly.

Which image-to-PDF tool should you use

Jobsixo has a few tools that put pictures on pages, and they overlap. Scan to PDF is the one named for the document case: it opens with A4 pages, auto orientation and a margin that leaves room for a stamp, with a one-file-per-photo option for certificates. The general Image to PDF tool and JPG to PDF share the same engine and are aimed at people who arrive with those phrases in mind. If you have a pile of photos of paperwork, pick this one; if you have PDFs to join, the answer is the Merge PDF tool instead.

When a document has both sides, such as an ID card, photograph the front and the back, add them in that order, and choose Fit page to the image or A4 depending on whether the recipient wants a card-sized page. A bundle of two-sided cards can be one PDF with every card on its own page.

Reading the result and its size

Open the PDF and look at the page order and the clarity of the smallest text. Because JPG pictures are stored as they are, the PDF for a set of photos is close to the sum of their sizes (PNG files can differ a little). Six photos of 2.5 MB each give a file near 15 MB. If a portal limits you to 2 MB, the fix is upstream or downstream: take lower-resolution photos, or bring each photo down to a stated number of kilobytes before adding it, or reduce the finished PDF to an exact limit with Compress to size.

Pages made this way are pictures, so the text on them cannot be searched, copied or selected. That is normal for a scan and perfectly acceptable for submissions that are only read by eye. It will not satisfy a portal that insists on searchable text.

Taking better photos first

• Use daylight or an even lamp, and avoid your own shadow falling across the page.
• Lay the paper flat on a plain, dark surface so the edges are easy to see, and hold the phone parallel to it. A tilted camera makes one side of the page smaller than the other, and the tool cannot correct that.
• Fill the frame. A small page in a large photo wastes pixels and leaves a busy background; crop the page afterwards if that happens.
• Check small print and stamps by zooming in before you add the photo.
• Photograph pages in order and name them 1, 2, 3 so the list is easy to arrange.

Common uses in India

The usual jobs are exam and admission forms that want certificates as a PDF, scholarship applications, KYC bundles for banks and insurers, and job applications. For jobs where a portal fixes the size and format of each document, Exam documents holds presets for the common cases, and this tool is how a gallery of photographs becomes the PDF you feed into it.

Others include expense claims made from receipt photos, a signed letter photographed and sent as a PDF, and handwritten class notes turned into a single file for a study group.

Mistakes that cause rejections

Photos in the wrong order top the list, followed by sideways pages. The tool places each picture exactly as the file stores it. If a page comes out on its side, turn it afterwards with Rotate PDF and save. Some cameras record orientation in a hidden flag instead of in the pixels, and this tool does not read that flag, so check every page after building.

A second common mistake is adding PDFs. This tool accepts pictures only; to combine existing PDFs use Merge PDF. A third is leaving the margin at 0 for a document that will be printed, since many printers cannot print to the paper edge and may clip a stamp or signature. The default of 24 points is safer.

Limits and privacy

There is no fixed limit on the number of pictures; the real limit is your device's memory, so a very large batch of full-resolution photos is better done in two goes. A file that cannot be read as an image stops the run with a message naming the file. The pages are plain pictures: no automatic edge detection, perspective correction, contrast clean-up or text recognition.

Everything runs in your browser. The photos are read on your device, the PDF is built there, and nothing is sent to a Jobsixo server. That suits identity documents and financial papers. If you only need a single image on a page without these controls, the plain Image to PDF tool covers it.