Compress Image to 45 KB
When a form says "maximum 50 KB", a file that your computer shows as 49 KB can still bounce. Compressing to 45 KB instead leaves a margin that survives every way of counting a kilobyte, while keeping nearly all the quality the 50 KB budget allows.
Compress Image
or drop JPG, JPEG, JFIF … files here ·
Max 95 MB per file· Up to 20 files· Deleted after 30 minutes
Files are processed on our servers and deleted after 30 minutes.
Never shrink below this width when downscaling. 0 means no minimum.
Optionally set the dimensions before compressing. Forms that specify pixels as well as KB need both.
Pixels for the side you chose above.
The search for the target size will not go below this quality; it downscales instead.
4:2:0 halves color resolution and saves a lot on photos; 4:4:4 keeps sharp edges on text, logos and screenshots.
Lossy PNG quantises colors (like TinyPNG) and is far smaller; lossless keeps every pixel.
How to use this tool
- 1
Add the photo or scan
Upload JPG, PNG, HEIC, WebP, BMP or TIFF files. Batches of up to 20 are compressed one by one to the same target.
- 2
Leave 45 KB and JPG
Target size is 45 KB and Output format is JPG. Open Advanced settings if the form also names pixel dimensions and set them under Resize first.
- 3
Compress to JPG
Press Compress to JPG. Every file comes back at or below 45 KB with its new size shown, ready to download one by one or together.
Forms with a 50 KB cap where 45 KB is safer
The 50 KB maximum is one of the most common numbers on Indian application portals. It covers the photograph on most central recruitment forms, the left thumb impression on bank exam forms and the scans on several identity applications. Because the limit is checked by a script, the server reads the exact byte count, and how it converts that to kilobytes depends on whoever wrote the form.
| Organisation | Requirement | Source |
|---|---|---|
| SSC (Staff Selection Commission) | Photograph 20–50 KB, JPEG | ssc.gov.in |
| IBPS and SBI recruitment | Photograph and left thumb impression 20–50 KB each | ibps.in |
| Protean (NSDL) online PAN application | Photo and signature scans at 200 DPI, up to 50 KB each | — |
| University and state admission portals | Frequently "below 50 KB" for the photo, sometimes for certificates too | — |
Compress image to 45 KB: the kilobyte math
There are two kilobytes in use. The SI kilobyte is 1,000 bytes; the binary one, which the IEC named the kibibyte in 1998, is 1,024 bytes. Windows still labels file sizes in binary units as KB, macOS Finder has used decimal units since Mac OS X 10.6, and web servers do whatever their programmer chose. A 50 KB limit therefore means anything from 50,000 to 51,200 bytes.
Targeting 45 KB removes the guesswork for the price of about 10% of the budget. On a portal-sized photo that is invisible. The tool lowers JPG quality first and only reduces pixel dimensions if quality would fall below the Lowest quality allowed, 40 by default. The guide to reducing image size in KB walks through those trade-offs.
Before you upload the 45 KB file
- The file name ends in .jpg or .jpeg, matching what the form lists
- Width and height match the notice, if it gives pixels
- The face fills most of the frame, with a plain light background
- The size shown is under 45 KB and above any stated minimum
- Photo, signature and thumb impression are separate files with clear names
45 KB image questions
Why does a 49 KB file fail a 50 KB limit?
The form and your computer may not mean the same thing by KB. Windows File Explorer counts 1 KB as 1,024 bytes, so 49 KB on screen can be 50,176 bytes, which is over a limit written as 50,000 bytes. At 45 KB the file is 46,080 bytes, under the cap whichever definition the server uses.
Is there a visible difference between 45 KB and 50 KB?
Not at portal sizes. The 5 KB difference costs only a few points of JPG quality on a 200 × 230 px photo, and no one checking your application will notice it. The difference only shows on much larger images.
Can I compress a thumb impression scan to 45 KB?
Yes. Scan the impression on white paper at the DPI the notice asks for, often 200 DPI, crop it to the box, and compress. Keep it in color unless the form says black and white, since a gray scan of blue ink can lose the ridge detail.
Will 45 KB pass a rule that also has a 20 KB minimum?
Yes, comfortably. The result lands just under 45 KB unless the source is already smaller than that, so it sits near the top of a 20–50 KB range. If you prefer the middle of the range, use compress image to 25 KB.
What if the PAN form asks for 200 DPI?
DPI is a number stored in the file and does not change its size in KB. What matters is the pixel count that 200 DPI implies for the printed size, for example 3.5 × 2.5 cm at 200 DPI is about 276 × 197 px. Set those pixels under Resize first and compress.
Can I get a PNG at 45 KB instead of JPG?
You can switch Output format to PNG, but forms that set a 50 KB cap almost always want JPG, and a photo stored as PNG needs far more bytes. For logos and graphics that must stay PNG, compress PNG to 50 KB explains the palette approach.