DocConvert Blog

How to Resize Photos for Government Exam Forms in India

Published: June 2026 | Reading time: 5 minutes

Every year, millions of candidates apply for government examinations in India, from SSC CGL and CHSL to IBPS banking exams, RRB railway recruitment, UPSC Civil Services, and NEET medical entrance. Almost every online application form requires candidates to upload a photograph and signature that meet specific technical requirements.

Why Do Forms Have Strict Photo Requirements?

Government portals enforce specific photo dimensions and file sizes to ensure consistency in printed admit cards and examination records. A non-compliant photo can lead to application rejection, wasting both time and application fees. The most common technical requirements include:

• Pixel dimensions: Specified as width x height in pixels (e.g., 200 x 230 pixels for SSC)
• File size limit: Usually between 20 KB to 100 KB maximum
• Format: Almost always JPG/JPEG format is required
• Background: White or light-coloured background is standard
• Recency: Photo should be taken within the last 3-6 months

Common Photo Specifications by Exam

Note: Requirements may change with each examination cycle. Always verify specifications from the official notification.

Step-by-Step Guide to Resizing Your Photo

1. Start with a good original photo: Take a well-lit photo with a plain white or light background. Face the camera directly with a neutral expression.
2. Choose the right preset: On DocConvert, select your exam from the government preset dropdown. This automatically fills the correct dimensions and target file size.
3. Upload your photo: Click the upload area or drag your image file. Supported formats are JPG, PNG, and WebP.
4. Review the preview: Check that the resized image looks clear and the face is properly centred.
5. Download: The tool compresses the image to meet the file size requirement while preserving quality.

Tips for Better Results

• Use the highest resolution original photo available. Starting with a better source image produces cleaner results after compression.
• Crop your photo to show head and shoulders only before resizing. This gives the algorithm more useful data to work with.
• If the file is still slightly above the limit, try reducing the target KB by 2-3 KB and converting again.
• Always download and verify the final file size in your file manager before uploading to the application form.

Open the Government Photo Resizer tool

Understanding Image Compression: JPG vs PNG vs WebP

Published: June 2026 | Reading time: 4 minutes

When working with images online, choosing the right format can significantly affect file size, quality, and compatibility. Here is a practical comparison of the three most common web image formats.

JPG (JPEG)

JPG uses lossy compression, meaning it permanently removes some image data to reduce file size. This makes it ideal for photographs and complex images where small quality losses are not visible to the naked eye.

• Best for: Photos, screenshots with gradients, images with many colours
• Not ideal for: Text, logos, images with sharp edges, images requiring transparency
• Supports transparency: No
• Typical compression: Can reduce photos to 5-10% of original size with acceptable quality

PNG

PNG uses lossless compression, preserving every pixel exactly as the original. This makes file sizes larger than JPG for photographs, but ensures no quality loss for graphics and text.

• Best for: Logos, text images, screenshots, icons, images needing transparency
• Not ideal for: Large photographs (file sizes become very large)
• Supports transparency: Yes (alpha channel)
• Typical compression: Lossless, so files are larger but pixel-perfect

WebP

WebP is a modern format developed by Google that supports both lossy and lossless compression. It typically produces smaller files than both JPG and PNG at equivalent quality levels.

• Best for: Web use where smaller file sizes matter, modern websites and apps
• Not ideal for: Situations requiring universal compatibility (some older software cannot open WebP)
• Supports transparency: Yes
• Typical compression: 25-35% smaller than equivalent JPG at same visual quality

Which Format Should You Use?

Understanding File Size vs Quality

When you compress an image, you are making a trade-off between file size and visual quality. Here is how compression quality levels typically affect a photograph:

• 90-100% quality: Nearly indistinguishable from original; file size reduced by 40-60%
• 70-89% quality: Minor quality loss visible only on close inspection; file size reduced by 60-80%
• 50-69% quality: Noticeable compression artefacts in detailed areas; file size reduced by 80-90%
• Below 50%: Visible blocky artefacts; only suitable when extreme compression is needed

DocConvert uses a binary search algorithm to find the optimal quality setting that meets your target file size while maximizing visual quality.

Try the Image Compressor tool

How to Merge PDF Files Without Installing Software

Published: June 2026 | Reading time: 3 minutes

Combining multiple PDF files into a single document is one of the most common document tasks. Whether you are assembling application materials, combining scanned pages, or creating a report from multiple sources, merging PDFs should be quick and easy.

Why Merge PDFs in the Browser?

Traditional PDF merging requires installing desktop software like Adobe Acrobat (which costs money) or free tools that may contain adware. Browser-based merging offers several advantages:

• No installation required: Works on any device with a modern browser
• Privacy: With DocConvert, PDFs are merged entirely in your browser and never uploaded to a server
• Speed: No waiting for server-side processing; merging happens instantly
• Cross-platform: Works on Windows, Mac, Linux, Android, and iOS

How to Merge PDFs with DocConvert

1. Open the Merge PDF tool: Navigate to DocConvert and click on "Merge PDF" in the PDF Tools section.
2. Select your files: Click the upload area and select two or more PDF files. You can also drag and drop files directly.
3. Review the order: Files are listed in the order they will be merged. The first file listed becomes the first pages of the output.
4. Click Merge: The tool combines the PDFs using pdf-lib, a JavaScript library that processes files in your browser.
5. Download: After a brief sponsored message, your merged PDF is ready to download.

Tips for PDF Merging

• If your PDFs have different page sizes (e.g., A4 and letter), the merged file preserves each page at its original size.
• For very large PDFs (over 50 MB), the browser may need extra time to process. Be patient and keep the tab open.
• Password-protected PDFs must be unlocked before merging. Use the Unlock PDF tool first.
• After merging, you can use the Rotate PDF or Delete Pages tools to further organize your document.

Common Use Cases

• Combining multiple scanned documents into one file for email attachment
• Assembling application packages (cover letter + resume + certificates)
• Creating a single document from multiple reports or invoices
• Combining front and back scans of ID documents

Open the Merge PDF tool

Creating the Perfect Passport Photo at Home

Published: July 2026 | Reading time: 5 minutes

Getting a professional-quality passport photo does not require a visit to a photography studio. With a decent smartphone camera and the right technique, you can create compliant passport photos at home.

Equipment You Need

• A smartphone with a decent camera (8 MP or higher)
• A plain white wall or white bedsheet for background
• Natural light from a window (or a bright lamp)
• A steady surface or tripod to keep the camera still

Taking the Photo

1. Set up the background: Stand about 30-50 cm away from a plain white wall. This prevents shadows on the background.
2. Position the lighting: Face a window or light source so your face is evenly lit. Avoid harsh overhead lighting that creates shadows under eyes and nose.
3. Frame yourself: The photo should show your head and the top of your shoulders. Keep the camera at eye level.
4. Expression: Keep a neutral expression with mouth closed. Look directly at the camera.
5. Take multiple shots: Take 5-10 photos and choose the best one. Check that eyes are open, face is centred, and there are no shadows.

Common Rejection Reasons

• Background not plain white (shadows, other objects visible)
• Face too small or too large in the frame
• Photo too dark or overexposed
• Red-eye effect
• Glasses causing glare (many agencies now prefer photos without glasses)
• Head tilted or not facing directly forward
• Photo older than 6 months

Processing with DocConvert Passport Photo Maker

1. Upload your best photo to the Passport Photo Maker tool
2. Select your target size (3.5 x 4.5 cm is standard international passport size)
3. Use the crop tool to position your face correctly within the frame
4. Enable "AI Remove Background" to replace the background with clean white
5. Set DPI to 300 for print-quality output
6. Adjust the target KB to meet your specific requirement
7. Click "Create" and download the finished photo

Standard Passport Photo Sizes Worldwide

Open the Passport Photo Maker tool

PDF Security: Password Protection and Unlocking Explained

Published: July 2026 | Reading time: 4 minutes

PDF files can be protected with passwords to restrict who can open or modify them. Understanding how PDF passwords work helps you manage document security effectively.

Two Types of PDF Passwords

PDF files support two different types of password protection:

• User password (Open password): Required to open and view the PDF. Without this password, the document cannot be read at all.
• Owner password (Permissions password): Restricts what actions can be performed on the PDF (printing, copying text, editing). The document can still be opened and read without this password.

When You Might Need to Remove a Password

• You set a password on your own document and now find it inconvenient for sharing
• Your bank or employer sent you a password-protected statement that you need to merge with other documents
• You know the password but want a copy without protection for easier access
• You need to merge a locked PDF with other documents (merging requires an unlocked file)

Important: You must know the correct password to remove protection. DocConvert does not crack or bypass passwords - it simply creates a new copy without the restriction after you provide the correct credentials.

How PDF Encryption Works

PDF documents use AES (Advanced Encryption Standard) or RC4 encryption to protect content. When you enter the correct password, the encryption key is derived from it and used to decrypt the document content. The security level depends on:

• Encryption strength: Modern PDFs use AES-256, which is computationally impossible to break without the password
• Password complexity: Longer passwords with mixed characters are significantly more secure
• PDF version: Newer PDF versions support stronger encryption standards

Best Practices for PDF Security

• Use strong passwords (12+ characters with letters, numbers, and symbols) for sensitive documents
• Share passwords through a separate communication channel (not in the same email as the PDF)
• Consider using owner passwords for documents you want viewable but not editable
• Remove passwords from personal documents you no longer need to protect to avoid losing access
• Keep unprotected backup copies of important documents in a secure location

Open the PDF Unlock tool