🎯 Resize Image to KB (Target File Size)
Need a photo under 50 KB or 100 KB for a form? Enter a target size and the tool compresses to fit — locally, no upload.
How the resize image to kb (target file size) works
Many upload forms — passport and visa portals, exam and job applications — cap the file size. The tool hits your target by binary-searching the JPEG or WebP quality: it re-encodes the image at different quality levels to find the highest one that still comes in at or under your target KB, and if even the lowest quality is too big, it progressively reduces the pixel dimensions until it fits. You get the best quality that satisfies the limit.
A target that's too tight for a large photo forces heavy compression or downscaling — if the result looks soft, raise the target a little or crop the image first so there are fewer pixels to fit. JPEG suits photos; WebP is smaller for the same quality but a few older upload forms reject it. The compression happens entirely on your device, so an ID photo for a government portal never passes through anyone else's server.
Frequently asked questions
How do I make an image under 50 KB?
Load the photo, set the target to 50 KB and choose JPEG, and the tool searches for the quality that lands at or under 50 KB, downscaling the dimensions if needed. It reports the final size and settings.
How is the file size reduced without picking a quality myself?
It binary-searches the encoder quality for you — encoding at several levels to find the highest quality that still meets your KB target — then downsizes the pixels only if compression alone can't reach it.
Why can't it hit a very small target?
A large, detailed photo has a floor below which it can't shrink without heavy downscaling. If the tool reports it can't reach your target, raise the target, crop the image, or accept the smallest achievable size it shows.
Should I choose JPEG or WebP?
JPEG is universally accepted by upload forms and best for photos. WebP produces a smaller file at the same quality, but a few older portals reject it — use JPEG if the form is strict.
Is my photo uploaded to resize it?
No — the encoding runs on your device with the browser's image codecs. Your image, often an ID or passport photo, never leaves your browser.