What you can do with this tool
These are the things people use it for most. Each link opens a page with the tool already set up and a short guide for that job.
Resize photo to 20 KB to 50 KB
Most bank and government forms want a photo between 20 KB and 50 KB, usually 200 × 230 pixels. Choose “IBPS & SBI: Photograph”, add your photo and download it. The tool picks the best quality that still stays under 50 KB. Resize a photo to 50 KB · Resize a photo to 20 KB
Reduce photo size in KB
A phone photo is often 3 to 5 MB, which is far too big for most forms. Type the limit from your form in “Maximum size (KB)”, for example 10, 30, 100, 200 or 500 KB, and the tool will compress the photo to fit. You can also change the width and height in pixels. Resize an image to 100 KB
Increase photo size in KB
Sometimes the form says the file is too small. Type the minimum KB in “Minimum size (KB)”. The tool saves the photo at the best quality, and if it is still too small, it adds empty padding inside the file to reach the minimum. Your photo looks exactly the same. Most other resizers can’t do this. Increase photo size in KB
Resize signature to 10 KB to 20 KB
IBPS and SBI ask for a signature of 140 × 60 pixels and 10–20 KB. Take a photo of your signature on white paper, keep “Clean up the paper” turned on, and download. Open the signature resizer
Make a passport size photo (3.5 × 4.5 cm)
A passport size photo is 3.5 cm wide and 4.5 cm tall. At 300 DPI that is 413 × 531 pixels. The tool makes this size and saves the DPI in the file, so it shows the right size in cm. This is a digital photo for uploading. It does not make a sheet for printing. Make a passport size photo
Add name and date on a photo
UPSC and some other forms want your name and the date the photo was taken printed below the photo. Tick “Print my name and date below the photo”, type your name and pick the date. The tool adds them inside the required size. Make a photo with name and date
Change PNG or a screenshot to JPG
Most forms only accept JPG. If your photo or scan is a PNG or WebP file, just add it to the tool. The file you download is always a JPG.
Thumb impression and handwritten declaration
Bank exams also ask for a left thumb impression (240 × 240 pixels, 20–50 KB) and a handwritten declaration (800 × 400 pixels, 50–100 KB). IBPS & SBI sizes for all four documents
Photo and signature for your exam
The tool has ready sizes for IBPS PO, IBPS Clerk, IBPS RRB, IBPS SO, SBI PO, SBI Clerk, UPSC (Civil Services and other exams), NEET UG, JEE Main, CUET and the US visa (DS-160) photo. For any other form, like SSC, railway, state PSC, university or job forms, choose “My own rules” and type the sizes from your notification. Or paste the rule line and the tool will read it for you.
Why online forms reject photos and signatures
The form does not look at your photo like a person does. It only checks a few numbers. If one number is wrong, it rejects the file. Often it just says “invalid file” and nothing more. Here are the most common reasons, and how this tool handles each one.
- The file is too big. A phone photo is usually 2 to 5 MB. Many forms allow only 50 KB. The tool makes the file small enough, but keeps it as clear as possible.
- The file is too small. This happens a lot with signatures. A signature is mostly white paper, so the file can come out at 6 or 8 KB when the form wants at least 10 KB. Most resizers can only make files smaller, so they can’t help. This tool adds some empty padding inside the file to reach the minimum. Your signature does not change at all.
- The width and height are wrong. “200 × 230 pixels” means exactly 200 wide and 230 tall. It is hard to get this right by cropping by hand. The tool always gives the exact size. You just choose which part of the picture to keep.
- The file type is wrong. iPhones save photos as HEIC. Screenshots are PNG. Most government and bank forms only take JPG (also called JPEG). Every file from this tool is a normal JPG.
- The size is given in cm. If the form says “3.5 cm × 4.5 cm”, it really needs a pixel size. The tool changes cm to pixels for you. See the table below.
- The name and date are missing. Some exams, like UPSC, want your name and the photo date printed below the photo. Tick “Print my name and the date” and the tool adds it.
How to read the size rules in a notification
Most notifications give one line for each document. For example: “Photograph: 200 × 230 pixels, file size 20 KB to 50 KB, JPG”. This one line has three rules:
- 200 × 230 pixels is the width and height of the picture. Width always comes first.
- 20 KB to 50 KB is the file size. The same picture can be 8 KB or 80 KB, depending on how much it is compressed.
- JPG is the file type. JPG and JPEG are the same thing.
Not sure what to enter? Click “Paste the rules from your notification”, paste the line for one document and press “Read these rules”. The tool fills in the numbers for you. Check them against your notification once before you download.
Converting cm to pixels
The formula is: pixels = cm ÷ 2.54 × DPI. DPI means “dots per inch”. If your form gives a DPI, use it. If it only gives cm, use 200 DPI. That is the usual value for application forms. Here are some common sizes:
| Size | In cm | At 200 DPI | At 300 DPI |
|---|---|---|---|
| Passport size photo | 3.5 × 4.5 cm | 276 × 354 px | 413 × 531 px |
| Stamp size photo | 2.5 × 3.5 cm | 197 × 276 px | 295 × 413 px |
| 2 × 2 inch photo (US) | 5.08 × 5.08 cm | 400 × 400 px | 600 × 600 px |
| Signature box | 4.5 × 2 cm | 354 × 157 px | 531 × 236 px |
Why your computer shows a different KB
Some computers count 1 KB as 1,000 bytes. Others, like Windows, count it as 1,024 bytes. So a file of 20,200 bytes is 20.2 KB on one and 19.7 KB on the other. That small gap can decide if a 20 KB minimum passes or fails. To be safe, this tool picks a size that passes both ways.
How to take a photo on your phone that gets accepted
Resizing can’t fix a bad photo. A photo with the right size can still be rejected when someone checks it. So take a good photo first:
- Stand in front of a plain white or light coloured wall.
- Face a window so daylight falls on your face. Don’t stand with the window behind you.
- Ask someone else to take the photo at your eye level. Selfies often look tilted.
- Look straight at the camera. Keep your eyes open and your face relaxed.
- Don’t wear sunglasses, a cap or a mask. Normal glasses are usually fine if there is no shine on them.
- In the tool, zoom in until your face fills most of the photo. Most forms want the face to cover about 70 to 80% of the photo. For a US visa photo, your head should be 50 to 69% of the photo height.
- Use a new photo. Some exams, like UPSC, now take a live photo of you while you fill the form and compare it with the one you upload.
How to capture your signature, thumb impression or declaration
- Sign with a black pen on plain white paper. Don’t use a pencil or sketch pen.
- Sign a few times and use the best one.
- Take the photo in daylight. Hold the phone straight above the paper. Make sure your hand or phone doesn’t cast a shadow.
- Leave some white space around the signature. Then use zoom in the tool to fit it in the box.
- Don’t sign in capital letters. IBPS, SBI and many others don’t accept that.
- Keep “Clean up paper background” turned on. It makes grey or yellow paper white and the ink darker, so it looks like a proper scan.
- For a handwritten declaration, copy the exact text from your notification in your own handwriting. Write in English and not in capital letters. Then take a straight photo of the whole page.
Common upload sizes
These are the sizes from recent notifications. Rules can change every year, so please check your own notification too. Last checked: October 2026.
| Form | Document | Pixels | File size |
|---|---|---|---|
| IBPS & SBI (PO, Clerk, RRB, SO) | Photograph | 200 × 230 px | 20 to 50 KB |
| Signature | 140 × 60 px | 10 to 20 KB | |
| Left thumb impression | 240 × 240 px | 20 to 50 KB | |
| Handwritten declaration | 800 × 400 px | 50 to 100 KB | |
| UPSC (Civil Services and other exams) | Photograph with name and date | 350 × 350 to 1000 × 1000 px | 20 to 300 KB |
| Signature (three signatures, one below the other) | 350 × 350 to 500 × 500 px | 20 to 100 KB | |
| NTA (JEE Main, NEET UG, CUET) | Passport-size photograph | Not fixed | 10 to 200 KB |
| Signature | Not fixed | 4 to 30 KB | |
| Visas and general | US visa photo (DS-160), square | 600 × 600 to 1200 × 1200 px | Up to 240 KB |
| Passport-size photo 3.5 × 4.5 cm at 300 DPI | 413 × 531 px | Not fixed |
Is your form missing? Choose “My own rules” in the tool, or paste the line from your notification. If a size above has changed, or you want a form added, please contact us.
Your photo never leaves your device
Your photo and signature are personal documents. Many free resizers upload them to their server, and you can’t see what happens to them after that. This tool works inside your browser. Your image is never sent to us or anyone else, and nothing is saved after you close the page. Once the page has loaded, it even works without internet.
Frequently asked questions
Why does the form keep rejecting my photo when it looks fine?
The form only checks numbers. Most often the KB size is wrong, the width and height in pixels are wrong, or the file is not a JPG (for example a PNG, or a HEIC photo from an iPhone). Sometimes a file name with spaces or symbols causes it. Use the file checker on this page to see which rule your file breaks.
How do I reduce photo size to 20 KB or 50 KB?
Add your photo to the tool above, then type the limit in “Maximum size (KB)”, for example 20 or 50. If your form also wants a minimum, type it in “Minimum size (KB)”. Set the width and height in pixels, then download. The tool finds the best quality that fits the limit.
What size should my photo and signature be for IBPS, SBI or UPSC?
For IBPS and SBI: photo 200 × 230 pixels, 20–50 KB; signature 140 × 60 pixels, 10–20 KB. For UPSC: photo 350 × 350 to 1000 × 1000 pixels, 20–300 KB, with your name and date below the photo. See the “Common upload sizes” table on this page, and always check your own notification.
Is this photo resizer free, and does it work on mobile?
Yes, it is free and needs no sign-up. It works in Chrome, Safari and other modern browsers on Android phones, iPhones and computers. On a phone, you can pick a photo from your gallery or take a new one with the camera.
What is the difference between KB and pixels?
Pixels are the width and height of the picture, like 200 × 230. KB is how much space the file takes. Two pictures of the same pixel size can have very different KB sizes. That is why many forms ask for both.
My signature file is smaller than the minimum KB. How do I make it bigger?
A signature is mostly white, so the file comes out very small, sometimes under 10 KB. Stretching it only makes it look worse. This tool first saves it at the best quality. If it is still too small, it adds empty padding inside the file to reach the minimum. Your signature looks exactly the same.
How do I change cm to pixels?
Pixels = cm ÷ 2.54 × DPI. At 200 DPI, 3.5 cm is 276 pixels. At 300 DPI, it is 413 pixels. You can also paste the rule from your notification into the tool and it will do this for you.
What DPI should I use?
Use the DPI given in your notification. If it gives only pixels, you can leave DPI empty. If it gives cm but no DPI, 200 DPI is a safe choice for forms. 300 DPI is common for printed photos.
Why does my computer show a different KB size from the form?
Some systems count 1 KB as 1,000 bytes and some, like Windows, count it as 1,024 bytes. So the same file can show as 20.2 KB in one place and 19.7 KB in another. This tool picks a size that passes both ways.
Can this tool make my photo background white?
No. Automatic background removal often leaves rough edges around the hair and ears, and that can get a photo rejected. It is better to take the photo in front of a white or light wall. For signatures and thumb impressions, the clean-up option does make grey or yellow paper white.
Is my photo uploaded anywhere?
No. Your browser does all the work on your own phone or computer. The image is never sent to Dovnixa or anyone else, and it is gone when you close the page. Once the page has loaded, it works even without internet.
Are the sizes in the list official?
They come from recent notifications by IBPS, SBI, UPSC, NTA and the US visa office. But rules can change every year, so check your own notification. If the numbers are different, choose “My own rules” or paste the rule text, and the tool will use your numbers.