Increase image size in KB
Add your JPG or PNG, type the minimum size your application portal asks for (for example 20 KB) and download a file of exactly that size. The picture is not re-compressed: labelled filler bytes are added, so the width, height and every pixel stay the same.
Raise a file to an exact size
Nothing is uploaded1–5120 KB. This tool counts 1 KB as 1024 bytes, so 50 KB means 51,200 bytes exactly.
Use it when a portal rejects a file for being under a minimum size. It cannot rescue a blurry or low-resolution photograph, and no amount of extra bytes will. If the portal caps the size instead, use the photo resizer.
How to increase a photo or signature to the minimum KB.
Find the minimum in your notice. The notices FormAssets tracks give a range, not a single number. IBPS-run recruitments ask for a 20–50 KB photograph and a 10–20 KB signature; the SSC CHSL 2026 notice asks for a 10–20 KB signature. The photo size table lists each source.
Enter a target inside that range. The tool shows the exact byte count it will produce before you download. A target a little above the minimum is safer than one on the boundary.
Read the result panel. It separates your original image data from the filler added to reach the target, so you know which bytes are which.
Open the downloaded file once. Confirm it still looks right, then upload it. Extra bytes raise the file size; they never raise the resolution.
Raise the minimum without changing pixels
Each row raises the same computer-generated 140 × 60 test signature with the padding this tool uses. The pixels and the encoded picture stay the same: the tool adds filler bytes inside the file, which image viewers skip.
| Target | Pixels | Before | After | Bytes added |
|---|---|---|---|---|
| 10 KB | 140 × 60 px | 7,371 bytes | 10,240 bytes | 2,869 |
| 20 KB | 140 × 60 px | 7,371 bytes | 20,480 bytes | 13,109 |
Tested on 11 October 2026 by running this tool's own code outside the browser. A KB here is 1,024 bytes.
Sources
Checked 23 September 2026. The file-size ranges come from the issuing authorities’ own documents:
- IBPS RRB XV upload guidelines (opens in a new tab) : photograph 20–50 KB, signature 10–20 KB.
- SSC CHSL 2026 notice (opens in a new tab) , paragraph 9.6: signature in JPEG/JPG, 10 to 20 KB.
How the filler is added follows the two image formats’ own specifications:
- ITU-T Recommendation T.81 (JPEG) (opens in a new tab) : section B.2.4.5 defines the comment (COM) segment used for JPG filler.
- W3C PNG Specification, Third Edition (opens in a new tab) : the IEND chunk “marks the end of the PNG datastream”; PNG filler is placed after it.
Questions
Does increasing the size in KB improve image quality?
No. The extra bytes are filler that exists only to pass a minimum-size check. They do not add resolution or restore detail, so a blurry photograph stays blurry. If the portal rejects the picture itself, you need a better photograph or scan, not a bigger file.
Will the width and height in pixels change?
No. The image is never decoded and re-encoded. For a JPG, the filler goes into comment segments placed just before the end-of-image marker; for a PNG, it goes after the IEND chunk that ends the image data. Width, height and every pixel stay exactly as they were.
How many bytes is 20 KB here?
FormAssets counts 1 KB as 1,024 bytes, so a 20 KB target produces a file of exactly 20,480 bytes. That is above 20,000 bytes too, so it meets a 20 KB minimum under either convention. Aim a little inside the range rather than at its edge: for a 20–50 KB limit, a 25 KB target leaves room on both sides.
What if my file is already bigger than the target?
The tool refuses and leaves the file alone, because there is nothing to increase. If the portal says the file is too large, use the photo resizer or the signature resizer to bring it under the maximum instead.
Which formats and sizes are supported?
JPG and PNG, with targets from 1 KB to 5,120 KB (5 MB). The output keeps the input's format. WebP is not supported yet; save the image as JPG or PNG first.
Is my image uploaded to a server?
No. The file is read and padded inside your browser and downloaded straight back to your device. Google Analytics records anonymous site usage, such as the target size chosen, but never the image or its contents.
Bytes are not detail.
Compare the numbers in the pixels, KB and DPI guide, or start from an application preset linked to its official notice.
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