Resize Image to Any KB Size
Resize your image to an exact size in KB right here in your browser. Upload a photo or signature, pick the limit your form asks for — 10KB, 20KB, 50KB, 100KB or 200KB — and download instantly. Your image stays in your browser; nothing is uploaded.
50% smaller
More options
Used for Make Smaller and Width & Height. Exact KB sets quality automatically.
Private
Image stays in your browser.
Fast
No upload required.
Free
No signup or watermark.
Flexible
Smaller, exact KB, or dimensions.
How to use
- 1
Upload your image
Click the upload area or drag in a JPG, PNG or WebP file.
- 2
Choose the KB size
Tap a target such as 20KB, 50KB or 100KB, or enter a custom KB value your form needs.
- 3
Adjust if needed
Open the custom settings to set an exact width, height or quality. Otherwise the tool does it for you.
- 4
Download
Check the final size under the preview, then download your resized image.
Resize any image to an exact KB size
Online forms, exam portals and job applications almost always set a maximum file size in KB. A raw phone photo is several megabytes — far too big. This tool bridges that gap: pick the KB limit your form lists and it produces a file at or just under that size, ready to upload. It works for photographs, scanned signatures, ID photos and screenshots alike.
How resizing in KB works
When you choose a target such as 50KB, the tool lowers JPG quality step by step (a binary search) until the file fits, removing detail your eye barely notices first. If quality alone is not enough — usually with very large images — it gently reduces the dimensions and tries again. You always see the original and final size side by side, so there is no guesswork.
Private and free, with no limits
There is no upload, no account and no watermark. Your image is processed locally with the HTML5 Canvas API and never leaves your device, so it is safe for ID and signature files. Because nothing is sent to a server, you can resize as many images as you like.
Frequently asked questions
How do I resize an image in KB?
Upload your image, choose the target file size in KB (for example 50KB), and the tool automatically lowers JPG quality — and the dimensions if needed — until the file fits. Then download it. Everything happens in your browser.
Can I choose any KB size I want?
Yes. Use the preset chips for common limits (10–200KB) or tap "Custom KB" and type any value, such as 35KB or 150KB.
Does resizing in KB reduce the image quality?
Smaller targets remove more detail, but the tool always keeps the highest quality that still fits your chosen size. For the best result, resize the dimensions to what you actually need first.
Are my photos uploaded to a server?
No. Every step — resizing, cropping and compression — happens locally in your browser using the HTML5 Canvas API. Your image never leaves your device, and nothing is stored or transmitted.
What should I do if my image cannot be compressed enough?
Open the "Need exact width, height or quality?" section and reduce the width and height — a smaller image reaches a tiny KB target far more easily. Make sure the output format is JPG, and start from the original photo rather than a screenshot. If a target is physically impossible, the tool shows the smallest clear result it can make instead of a broken file.
Which output format should I choose?
Choose JPG for photographs and most form uploads because it gives the smallest file size. Use PNG only when you need a transparent background or razor-sharp line art. WebP gives excellent compression but some older government portals do not accept it — check the form requirements first.
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