Turn a PDF into a JPG that the form will accept

The quick answer: six steps

When a form says "JPG only" and your document is a PDF, turn the page into a picture first. You can do it in your phone's browser, with no app to install:

1. Read the form's rule. Note the file type, the limit in KB (or MB) and any size in pixels. The next part explains each one.
2. Open PDF to JPG and tap Choose PDF files.
3. Tap Choose pages and type the page the form wants, like 1. You get one picture, not a ZIP file.
4. Pick Small, Normal or High, and keep JPG. Small makes the smallest file.
5. Tap Convert, then read the line under the picture. It shows the pixels and the size.
6. Tap Download and upload the file from your Downloads.

Over the limit? Go one sharpness step down and convert again. Below the form's minimum? Go one step up. That loop of convert, read the size and adjust is the whole trick.

The page is drawn inside your own browser, so your Aadhaar, PAN card or marksheet never leaves your phone while you do this.

One honest warning. Our converter has three settings and shows each picture's size. It cannot aim at an exact number of KB, or make a picture an exact width and height. For most forms the three settings are enough, and the later parts cover the rest.

What the form is really asking for

Upload rules come in short, technical words, often in small print beside the button. Each word changes what you should pick:

Rules often come together, like "JPG, 50 KB to 200 KB, 200 DPI". Take a screenshot of the rule, so you can check your picture against every part of it. KB is a kilobyte and MB a megabyte. About a thousand KB make one MB, so "under 2 MB" is far roomier than "under 100 KB".

Does the form take a PDF somewhere else?

Look at the whole form first. Some forms ask for a PDF in one slot and a JPG in another, so convert only for the slots that need pictures. If a slot takes a PDF under a size limit, Resize PDF aims for the limit you pick or type, and tells you if the file can't get under it. Compress PDF to 100 KB is the same tool with that popular limit already picked. Photo and signature slots usually have their own pixel rules and want a picture of you or your signature, which this tool doesn't make.

KB, pixels and DPI are three different things

Size in KB

How much space the file takes. A "file too large" message is about this.

Size in pixels

How many tiny dots wide and high the picture is, like 1240 × 1754. More pixels means more detail and, usually, more KB.

DPI or ppi

How many of those dots cover each inch of the paper page. DPI is dots per inch, ppi is pixels per inch, and for a picture of a page they mean the same.

In our converter the three rise together. A higher setting gives more pixels, a higher ppi and a bigger file:

Doubling the ppi gives four times the pixels, so each step up is a big jump in detail and in KB. In our tests, High files were 2.4 to 4.3 times bigger than Normal ones. Each file also carries its ppi, so it prints at the page's real size.

Before you convert, the line under the sharpness choices tells you what the first page of your PDF will become, in words like "An A4 page becomes 1240 × 1754 pixels." The same setting does not give the same KB for every page, because what is on the page matters too. The next part uses real numbers.

Getting the size in KB right

Nobody can tell how many KB a picture will take until it is made. We converted these files in Chrome on our test computer and noted the sizes the page showed:

• Small is a real shrink, but not a promise. The same setting gives different sizes for a scan and for a page of text, so the page decides as much as the setting does. Always read the size of your own picture.
• PNG is wrong for a KB limit. The scan came to 1.58 MB as JPGs and 11.1 MB as PNGs. Keep JPG.
• High costs a lot of KB. Use it when the form asks for 300 DPI, or the limit is generous.

The adjust loop

1. Pick a starting point. For a tight limit like 100 KB, start with Small, as the guide's tips suggest. For a roomy limit, start with Normal, which is sharper. Your own page decides the rest.
2. Convert and read the size under the picture.
3. Too big? Go down a step. Too small for the form's minimum? Go up a step.
4. Stop at the sharpest setting that fits, not the smallest. The reviewer has to read your name, dates, roll numbers and stamps, and Small is soft on small print.

Leave a little room under the limit

Our page counts 1 KB as 1,024 bytes, while some websites count 1,000, so there the same file looks a little bigger: a picture that shows 98 KB here is just over 100 KB on such a site. The size we show is also rounded to a whole KB. So aim a little under the limit, not right at it.

When Small is still over the limit

Small is the smallest our tool goes. There is no lower setting and no quality slider: JPGs are always saved at quality 90 out of 100. If your picture is still too big, try these, easiest first:

1. Crop away empty paper. A scan often has wide margins, a blank half page or a shadow around the edge. Fewer pixels make a smaller file. Crop in your gallery or a photo editor, then check the size again, because saving an edited picture changes it.
2. Make the picture narrower in pixels. Photo editors and resize apps can set a smaller width. The file gets smaller and the text softer, so check that you can still read the small print.
3. Ask whether a PDF is allowed. Resize PDF aims a PDF at the limit you pick, which our JPG tool can't do for a picture.
4. Scan again more plainly, if you are still scanning. Lay the page flat in good light, crop to the paper's edges, and use grayscale if the form doesn't need colour. Shadows and grain add KB.

And when the file is too small

If a form has a minimum, such as 50 KB, a tiny file may be refused as "not clear". Go up to Normal. If your PDF is a scan, its pictures can only be as sharp as the scan, so High mostly makes the file bigger.

When the form wants an exact width and height

Our converter makes each picture the whole page, at one of three sizes. It can't make a picture exactly 800 × 1000 pixels, and it can't crop. This way works for most forms with a pixel rule:

1. Convert at High, which gives you more pixels than you need. Making a picture smaller keeps it clean, while making it bigger only stretches and blurs it.
2. Crop to the part you need, such as the ID card or a table, in your gallery or a photo editor.
3. Set the width and height in the editor to the numbers the form wants.
4. Check the pixels, then the KB. An edited JPG is saved again, so its size has changed.

A full A4 page is tall and narrow. If the form wants a square or wide picture, crop first and resize second, or the page will look squashed. A form that asks for something like "200 × 230 pixels" is usually asking for a photo or a signature, not a page.

More than one page, or both sides of a card

Each page has its own slot

Type all the pages you need, like 1-3, or 2, 5. You get one picture for each page, in page order, and each has its own Download button, which is handier on a phone than a ZIP file. Names look like marksheet-page-1.jpg. A form that asks for JPG will usually refuse a ZIP file, so use the buttons, or open the ZIP first, as the file names and ZIP part of the guide shows.

Several PDFs, one picture from each

Say you have a Class 10 marksheet, a Class 12 marksheet and a caste certificate as three PDFs. Add all three, tap Choose pages and type 1. You get page 1 of each, every picture named after its own PDF. The same page number is taken from each PDF.

The form wants both sides in one picture

Our tool makes one picture per page and can't join two pictures into one. You can:

• Check the PDF. If both sides are on one page, convert that page and crop it.
• Ask whether two uploads are allowed, one for each side.
• Use a photo editor or collage app to put the two pictures together, then check the size and pixels again.

Getting the page number right: count from the first page of the file, not by the number printed on the page. If you're not sure, open the PDF in our PDF Viewer: the page box in its toolbar shows which page you are on.

From PDF to upload on a phone

Save the PDF to your phone first. One that only sits inside a WhatsApp chat or an email may need saving before the browser can pick it. Then:

• On Android, open PDF to JPG in Chrome, Samsung Internet or another up-to-date browser. After you tap Download, the picture goes to your Downloads folder, where your gallery and Files apps can find it. On the form, choose to pick a file and look in Downloads.
• On iPhone and iPad, use Safari or Chrome and pick the PDF from the Files app. The picture usually goes to Downloads in the Files app. On a form, the upload button usually lets you pick from your photos, the camera or Files. Pick the Files choice (often called Choose File). If a form only lets you pick from Photos, first open the picture in Files, tap Share, then Save Image.

Checking the size yourself

Our page shows each picture's size, and you can check it again from the file. On an iPhone, touch and hold the file in Files and look for Get Info. On Android, open the file's menu in your Files app and look for an option such as Details or File info. On Windows, right-click the file and choose Properties. On a Mac, choose Get Info.

Keep the converter page open, with the screen on, until your picture is ready. One page is quick, even from a long PDF, because only the pages you ask for are drawn.

Check these before you upload

• Right page, right way up. A sideways page stays sideways in the picture.
• Readable small print. Zoom in on names, dates, roll numbers and stamps. If you can't read them, the reviewer can't either.
• Size inside the rule, with a little room under the limit and above any minimum.
• The file ends in .jpg. A PDF and a JPG can sit side by side with nearly the same name, so look at the ending.
• A plain name. Some portals refuse spaces and symbols. Something like marksheet-class12.jpg is a safer choice.
• You still have the PDF. A picture keeps how the text looks, not the text, so it can't be searched or copied.

Do this a few days before the last date, when a refused file is still easy to fix.

When the form still says no

"File too large"

Go one step down in sharpness, then crop away empty paper. See when Small is still over the limit.

"File too small" or "below the minimum"

Go up to Normal. A scan doesn't get sharper at High, only bigger.

"Invalid file type"

Check what you picked. A ZIP, a PDF or a PNG can be refused where JPG is asked. If you made several pictures, pick one from inside the ZIP.

"Invalid dimensions"

The form wants exact pixels. Use the crop and resize way.

"Image not clear"

Convert again at a higher setting if the limit allows. If the PDF is a scan, the picture is only as sharp as the scan.

The picture is sideways

The page is sideways in the PDF too. Turn it upright with Rotate PDF and convert the new file, or turn the picture in your gallery and check its size again.

The PDF asks for a password

Type it on the PDF's card in the converter and press Open. It is used only on your device.

"Only PDF files work here"

This is our converter's message, not the form's: you added a picture or another file. The converter takes PDFs only. For a JPG that is the wrong size, use a photo editor.

The troubleshooting part of the guide has more fixes. To turn pictures back into a PDF, use JPG to PDF.