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Guaranteed Exact KB Tool

Interactive Crop & Resizer

Touch/Mouse cropping with an advanced compression engine. Target any KB limit precisely without inflating the file size.

Upload Photo to Crop

Drag & Drop or Click (JPG, PNG, WEBP)

Picture
Width
Height
Crop box will automatically match this ratio.
KB
Our engine guarantees the downloaded file will be under this size.

Smart Image Resizer & Exact KB Compressor for Exam Portals

Online competitive exam forms (such as UPSC, SSC CGL/CHSL, JKSSB, IBPS, NEET, JEE, Railway RRB, and State PSCs) enforce strict criteria for uploading passport photos, signatures, and thumb impressions. Failing to upload an image within exact file size limits (like 20 KB to 50 KB) or precise dimensions (like 3.5 cm x 4.5 cm) often leads to application form rejections.

Our Free Online Image Resizer & Cropper is engineered specifically to eliminate this hassle. With interactive touch and mouse cropping, real-time centimeter-to-pixel conversion, and a guaranteed exact-KB compression engine, you can prepare all your exam documents in seconds without losing visual clarity.

Touch & Mouse Cropper

Freely frame your face or signature with a drag-and-drop crop box. Rotate, zoom, and adjust on both mobile phones and desktop computers.

Strict Target Size in KB

Input your exact target limit (e.g., 20 KB or 50 KB). Our multi-stage algorithm compresses your image without inflating the file size.

Centimeter & Pixel Support

Switch seamlessly between Pixels (px) and Centimeters (cm). We automatically calculate standard 300 DPI print resolutions for government portals.

100% Safe & Private

All image processing and compression takes place locally inside your web browser. No photos are ever uploaded or stored on any server.

Standard Image Dimensions & Sizes for Popular Exams

Quick reference guide for common government recruitment and entrance exam upload requirements:

Document Type Dimensions (cm / px) Required File Size (KB) Accepted Formats
Passport Size Photograph 3.5 cm × 4.5 cm (or 413 × 531 px) 20 KB – 50 KB JPG / JPEG
Candidate Signature 4.0 cm × 2.0 cm (or 472 × 236 px) 10 KB – 20 KB JPG / JPEG
Left Thumb Impression (LTI) 3.0 cm × 3.0 cm (or 354 × 354 px) 10 KB – 50 KB JPG / JPEG
Certificates & Marksheets A4 (21.0 cm × 29.7 cm) 100 KB – 300 KB JPG / PDF

Frequently Asked Questions (FAQs)

1. How do I resize an image to an exact size like 20 KB or 50 KB?
Upload your photo, set the crop box to frame your picture, enter your desired number in the Strict Target Size (KB) field (e.g., 20 or 50), and click "Crop & Download". Our engine compresses the file to stay strictly at or below your target.
2. How do I convert centimeters (cm) to pixels (px) for exam forms?
Select Centimeters (cm) from the unit dropdown, enter the required dimensions (e.g., 3.5 Width and 4.5 Height for passport photos), and the tool will automatically calculate the required pixels at standard 300 DPI resolution.
3. Why does my signature photo turn black when converted to JPG?
Transparent PNG files do not have a background color, causing standard converters to render the background as black. Our tool automatically applies a clean white background behind transparent signatures to ensure clear and readable results.
4. Can I use this image resizer on Android and iPhone?
Yes, this tool is fully touch-optimized. You can use your fingers to pinch, zoom, drag the crop box, and download resized images directly onto your mobile device without installing third-party apps.
5. Is my uploaded photo kept safe and private?
Absolutely. The resizing, cropping, and compression are handled entirely on your device via client-side HTML5 Canvas and JavaScript. No image files or personal data are ever transmitted to our servers.
6. Which image formats are supported?
You can upload images in JPG, JPEG, PNG, and WEBP formats. The final output is automatically exported as a standard, form-compliant JPG image.