Welcome to DocReady.in, the most advanced and free online image resizer tool designed specifically for students, job seekers, and web developers. Whether you are applying for a government job like SSC, UPSC, or Railway, or you simply need to compress image to 20kb for a website upload, you have landed on the right page.
In today's digital world, almost every online application form has strict limits on file sizes. You might have faced errors like "File size is too large" or "Upload image between 20kb to 50kb". Our tool solves this problem instantly. We help you reduce image size in kb and mb without losing quality.
Table of Contents (Click to Close)
- What is Image Resizing?
- Why Do You Need to Compress Images?
- Step-by-Step Guide to Use DocReady Tool
- Ultimate Guide: Photo Sizes for Indian Exams (2025-2026)
- Understanding KB vs MB vs Pixels
- How to Resize Photos on Mobile?
- JPG vs PNG: Which is Better?
- Common Upload Errors & Solutions
- Frequently Asked Questions
What is Image Resizing and Compression?
Image resizing refers to changing the dimensions (width and height) of a digital image. For example, changing a photo from 1920x1080 pixels to 350x350 pixels (passport size). However, resizing isn't just about dimensions; it's also about file size compression.
When you click a photo with a modern smartphone, the size is usually between 2MB to 5MB. However, online servers cannot handle such large files for millions of users. That is why they ask you to compress JPEG to 50kb or less. DocReady.in uses advanced algorithms to remove unnecessary metadata from your image, reducing the file size drastically while keeping the image looking sharp and clear.
Why Do You Need to Compress Images Online?
There are several reasons why reducing image size is crucial in 2025:
- Faster Website Loading: If you are a blogger or web developer, large images slow down your site. Google prefers fast-loading sites. Compressing images helps in SEO.
- Online Application Forms: Government portals (Sarkari Result, UPSC Online, SSC Nic) have strict bandwidth limits. They reject files larger than 50KB or 100KB to save server space.
- Email Attachments: Gmail and Outlook have attachment limits (usually 25MB). Sending smaller images ensures your email is delivered instantly.
- Save Data & Storage: Smaller images take up less space on your phone and use less mobile data when sharing on WhatsApp or Telegram.
How to Use DocReady Image Resizer Tool?
We have designed our tool to be the simplest photo resizer online. You don't need technical skills. Follow these steps:
Step 1: Upload Your Photo
Click on the "Upload" or "Select Image" button. You can choose files from your Gallery, File Manager, or even take a fresh photo using your camera.
Step 2: Choose Your Requirement
You have three options:
- By Dimensions (px/cm): If the form asks for 3.5cm width x 4.5cm height, enter these values.
- By File Size (KB): If the form asks for "Max 50KB", simply enter '50' in the target size box. Our AI will adjust the quality automatically.
- By Percentage: Simply reduce the image by 50% or 75% to make it smaller.
Step 3: Download
Click "Resize" and wait for a second. Your optimized image is ready. Click "Download" to save it. We recommend checking the file size in your file manager to be sure.
Ultimate Guide: Photo & Signature Sizes for Indian Exams (2025-2026)
This is the most important section for students. Every exam has different requirements. If you upload the wrong size, your admit card might be rejected. Use the data below with our DocReady Resizer.
1. SSC Exams (CGL, CHSL, MTS, GD Constable)
The Staff Selection Commission (SSC) is very strict about photos. The photo must not be older than 3 months.
| Document | File Size | Dimensions | Format |
|---|---|---|---|
| Photograph | 20 KB to 50 KB | 3.5 cm (W) x 4.5 cm (H) | JPEG/JPG |
| Signature | 10 KB to 20 KB | 4.0 cm (W) x 2.0 cm (H) | JPEG/JPG |
2. UPSC Civil Services (IAS/IPS) & NDA
Union Public Service Commission (UPSC) changed its rules recently. The name and date on the photo are often required.
| Document | File Size | Dimensions (Pixels) |
|---|---|---|
| Photograph | 20 KB to 300 KB | 350px x 350px (Min) |
| Signature | 20 KB to 300 KB | 350px x 350px (Min) |
Note: UPSC requires the dimensions to be square (same width and height) in pixels.
3. IBPS & SBI (Banking Exams)
Banking exams like IBPS PO, Clerk, and SBI PO require a "Left Thumb Impression" and a "Handwritten Declaration" along with the photo.
- Photo: 20kb - 50kb (4.5cm x 3.5cm)
- Signature: 10kb - 20kb (Black Ink is preferred)
- Thumb Impression: 20kb - 50kb (Blue or Black ink)
- Handwritten Declaration: 50kb - 100kb (Must be in English only)
4. NEET (UG/PG) & JEE Main (NTA)
For medical and engineering aspirants, NTA requires a postcard-size photo as well.
- Passport Photo: 10kb - 200kb
- Postcard Photo (4"x6"): 10kb - 200kb
- Signature: 4kb - 30kb
Understanding KB vs MB vs Pixels
Many users get confused between these terms. Here is a simple explanation:
What is a Pixel (px)?
Pixels are the tiny dots that make up an image. More pixels mean higher quality but larger file size.
Example: A Full HD wallpaper is 1920x1080 pixels.
What is KB and MB?
This represents the "weight" of the file on the disk.
1 MB (Megabyte) = 1024 KB (Kilobyte).
Most forms ask for KB. If your photo is 2 MB, you need to compress it by roughly 40 times to reach 50 KB. Our image compressor to 20kb tool does this calculation for you.
How to Resize Photos on Mobile (Android/iPhone)?
You don't need a computer to fill out forms anymore. DocReady.in is fully mobile-responsive.
- Open Chrome or Safari on your mobile.
- Visit www.docready.in.
- Tap "Upload Image" and select "Camera" to take a selfie against a white wall, or select from "Files".
- Use the Crop feature to remove background objects.
- Set the target size (e.g., 20kb).
- Download and upload directly to the form website.
Warning: Do not take photos of existing physical photos. This reduces quality. Try to upload the original digital file if possible.
JPG vs PNG vs WEBP: Which Format to Choose?
Our tool allows you to convert between formats. But which one should you use?
- JPG / JPEG: The King of formats. 99% of government forms (SSC, UPSC, Railways) accept ONLY JPG. It is best for photos as it keeps file size low.
- PNG: Best for logos, transparent backgrounds, and text-heavy images. However, PNG file sizes are usually larger than JPG. Avoid using PNG for exam forms unless specified.
- WEBP: A modern format by Google. It is very small in size and great for websites, but many old government websites do not accept WEBP yet.
- PDF: Document format. Use our JPG to PDF converter if the form asks for a document upload.
Common Image Upload Errors & Solutions
Even after resizing, sometimes uploads fail. Here is how to fix them:
Error 1: "Invalid Image Dimension"
Solution: The website wants a specific Width x Height. Use the "Dimensions" tab in our tool and enter the exact pixels (e.g., 132x170 px).
Error 2: "Image is Blurry or Unclear"
Solution: This happens when you compress a very large image too much (e.g., 5MB to 10kb). Try to take the photo in lower resolution initially or ensure good lighting. Avoid compressing below 20kb unless mandatory.
Error 3: "Format Not Supported"
Solution: You might be uploading a PNG or HEIC (iPhone format). Use DocReady to convert your file to JPG and try again.
Frequently Asked Questions (FAQ)
1. Can I resize multiple images at once?
Currently, for high precision required in government forms, we recommend processing one image at a time to check quality. However, we are working on a bulk image resizer feature coming soon to DocReady.
2. How to compress JPEG to 20kb for SSC?
Upload your photo, go to the "Compress by Size" section, enter "20" in the text box, and click Resize. The tool will automatically calculate the best quality to fit 20kb.
3. Is this tool free forever?
Yes, DocReady.in is a 100% free web tool. We support the website through ads so that students can use it without paying any subscription fees.
4. My photo signature is very light, can you darken it?
While resizing, ensure you scan the signature with good contrast. In future updates, we will add brightness/contrast adjustment tools.
Conclusion:
Image resizing shouldn't be a headache. With DocReady.in, you have a powerful, secure, and fast image resizer tool in your pocket. Whether you are resizing for Instagram, a blog post, or the all-important government exam, we ensure your visual content is perfectly optimized. Bookmark this page now and share it with your friends who are struggling with online forms!
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