About Us
Hello. KBresizer is a small, free tool that changes a picture to an exact size in kilobytes, so an upload form stops refusing it.
It exists because that particular problem is far more frustrating than it ought to be. A form asks for 20 KB, your phone hands you four megabytes, and an application you spent weeks preparing stalls on a photograph. This page explains who built it, how it works, and what it deliberately refuses to do.
Who Runs This
KBresizer is built and run by Sanwal Joiya. It is one person rather than a company, which is worth knowing before you decide how much to trust it.
This started with a question rather than a plan. Millions of people in India search every month for a way to hit an exact file size, which is an odd thing for so many people to need. Looking into why, the answer turned out to be government exam portals and their upload rules.
What I did not expect was how many existing tools get it half right. Almost all of them respect the maximum a form sets. Very few respect the minimum, even though Indian portals routinely enforce both and reject a file for being too light without ever saying so. That gap is the reason this site exists.
I build and run small web tools. I am not a photographer or an imaging researcher, and nothing on this site is presented as expert opinion. What is here is the result of reading the specifications carefully, testing the tool against real files, and being willing to write down where the published figures disagree with each other.
The Problem This Solves
Plenty of tools already compress images. What most of them miss is that Indian exam portals enforce two limits rather than one, and the error message almost never tells you which one you broke.
The whole problem in one line
A tool that watches only the ceiling will cheerfully hand you a 6 KB signature for a form that requires at least 10 KB, and report it as a success.
So people compress harder, fail again, compress harder still, and never discover that the problem was the opposite of what they assumed. Fixing that was the whole reason to build another one of these.
What It Deliberately Does Not Do
There is no format converter here, no background remover, no PDF tool and no account system. Each was considered and left out, because a tool that does one job properly beats one that does eight adequately.
Four commitments follow from that, and each one costs something. They are listed with their price attached, since a promise that costs nothing is not worth much.
| Commitment | What it costs |
|---|---|
| No file is ever uploaded | No batch processing, no server-side features, no history across devices |
| No claim of lossless compression | Rivals advertise “no quality loss” and it reads more reassuring than the truth does |
| Exam figures are dated and rated | Admitting that published sources conflict looks less authoritative than simply stating a number |
| One job only | Format conversion alone is roughly 250,000 searches a month, left out on purpose |
The second is worth expanding on. JPEG is a lossy format, so saving at a smaller size always discards information. Any tool promising otherwise is either confused or hoping you are. What a good compressor really does is give up detail where your eye will not look, then tell you what it changed.
Why Nothing Is Uploaded
There is no server copy to delete
The files people bring to a tool like this are signatures, identity documents, caste and income certificates and exam photographs. Several well known compressors move those to a server and delete them after an hour or a day. Disclosing that is fair enough, but it was still a copy that existed.
You do not have to take this on faith. Load the page, switch your internet connection off, and resize a picture. It will work, because there was never anything to send.
How The Tool Works
No secret is being kept, and the method matters more than any marketing claim, so here it is plainly.
Your picture is decoded in the browser and re-encoded as JPEG several times at different quality settings. A binary search closes in on the highest quality that still fits underneath your target, usually within eight passes and under a second. The result always lands below the number you asked for, never on it and never above.
Where quality alone cannot reach the target, the pixel count comes down too. This part matters more than it sounds: a JPEG needs roughly 0.7 to 1.2 bits for every pixel it stores, so forcing a very large picture into a very small file guarantees the grey blocking people complain about. Cutting pixels first keeps what remains sharp, and the result panel prints the dimensions it settled on so the trade is visible rather than hidden.
Where a form sets a minimum as well as a maximum, the same search runs in the other direction until the file clears the floor.
How The Exam Figures Are Compiled
Carefully, and with the limits stated. The specifications on the government form photo and signature sizes page are gathered from published sources, cross-checked against one another, dated, and marked with a confidence level based on how many independent sources agree.
Where sources conflict, that is said out loud rather than settled by picking a favourite. Railway photograph sizes, for example, appear as anything between 20 and 100 KB depending on which page you read, so those entries carry a low confidence rating and the preset sets only what can be defended.
None of it is official, and no third-party page is. Your own notification is the only authority, and every table on this site says so.
How It Is Paid For
Advertising, and nothing else. There is no paid tier, no subscription and no feature held back from the free tool. Running costs are low precisely because no file is processed on a server, so the tool itself costs almost nothing to keep online.
None of that changes the tool. There is no premium version, no watermark to remove and no cap on how many pictures you resize.
Corrections And Contact
If a figure on this site is wrong, please say so. Exam specifications change every cycle and a page that is right today can be wrong by the next notification, so a correction with a link to the official document is genuinely welcome rather than an inconvenience.
The same goes for the tool itself. If a file will not reach a target it should reach, or a result looks wrong, that is worth reporting. You can reach us at contact@kbresizer.in.