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Resize Image to KB

Hit an exact file size limit in KB or MB, automatically.

Image Tools Reviews Free · no sign-up

Drop an image here, or click to choose one

JPEG, PNG, WebP, GIF or SVG · processed on your device, never uploaded

Quick Tool Overview

Resize Image to KB shrinks a photo until it fits an exact file size limit — the 200 KB cap on a job application, the 1 MB cap on a registration form. The tool searches for the highest quality that still fits, by bisection rather than guesswork, and reduces the dimensions as well if quality alone cannot get there. The result is never over the number you asked for.

What it does
Compresses an image to a target file size
You give it
A photo and a maximum size in KB or MB
You get back
A file at or under that size
Best for
Upload forms with a hard size limit
Image Tools Free, unlimited use No sign-up Runs in your browser

About the Resize Image to KB

Government portals, job applications and exam registrations are full of forms that reject anything over 200 KB, and no photo editor has a "make it exactly 200 KB" button. This one does.

Type the limit, and the tool searches for the highest quality setting that still fits under it, narrowing in by bisection rather than guessing. If quality alone cannot get there — which happens when a very large photograph is pushed under a very small cap — it reduces the dimensions as well and tells you it has done so. The result is always at or under the number you asked for, which is the only thing the form on the other end cares about.

Key features of the Resize Image to KB

Hits the number exactly

A bisection search converges on the best quality that stays under your cap, so you never overshoot or leave quality on the table.

Falls back to dimensions

When quality alone cannot reach the target, the pixel size is reduced too — and the tool tells you it has done so.

KB or MB

Type the limit in whichever unit the form quotes, so there is no converting in your head.

JPEG or WebP output

WebP fits noticeably more picture into the same bytes when the form accepts it; JPEG is the default because most do not.

Never goes over

Only a result at or under the limit is accepted, so the file you download always passes the check on the other end.

How to use the Resize Image to KB

  1. 1

    Load the photo

    Drop in the image the form rejected. Its current size is shown at the top.

  2. 2

    Type the limit

    Enter the maximum, in KB or MB — 200 KB and 1 MB are the two that come up most.

  3. 3

    Let it search

    The quality is narrowed automatically until the file fits, and the final size is reported.

  4. 4

    Download and upload

    Save the result and submit it. It will be at or under the cap you set.

Frequently asked questions

By bisection. It encodes at full quality, then repeatedly halves the search range between the settings that fit and those that do not, converging on the best quality that stays under your limit in about ten passes.

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