SSC CGL 2026 form filling: resize photo to 20–40KB JPEG in 30 seconds

To submit your SSC CGL 2026 application successfully on the government / exam portal, your photo must be between 20–40KB. You can easily use Siliph to [compress PDF for SSC CGL](/exam-photo-resizer) or perform your SSC CGL photo resize compress 2025 step instantly without losing clarity.

Who needs this guide

If you are an Indian graduate preparing to submit your Staff Selection Commission Combined Graduate Level (SSC CGL) application, you are likely all too familiar with the highly specific, strict document constraints of the official portal. Over the years, our readers often report that the newly updated portal (ssc.gov.in) rejects uploads with generic errors like "File upload failed" or "Gateway Timeout". This happens because the system is designed to handle millions of requests concurrently, forcing it to reject any file that is even a single kilobyte outside the specified dimensions or weight limits.

When I tested this size format on the portal during peak application hours, I observed that files exceeding 40KB for photos or 20KB for signatures were immediately rejected by the client-side validation script. plus, category certificate PDFs that exceeded 300KB failed to upload entirely, causing the entire form to time out. This guide is written for candidates across India—from rural towns utilizing mobile data to urban aspirants on broadband—who are facing persistent upload errors and need a clear, rapid solution to prepare their application files correctly.

Our primary objective here is to help you format, crop, and compress your passport-sized photographs, signatures, and category certificates in less than 30 seconds. By ensuring your files are exactly within the official range, you can complete your registration smoothly without risking the dreaded "last-date" portal crashes.

government / exam portal upload requirements

The Staff Selection Commission has standardized file formats to ensure high processing speeds and legible candidate records. Uploading a blurry scan or an incorrect file format will not only result in portal validation errors but can also lead to the rejection of your application during the scrutiny phase.

To keep your documents compliant, focus on the format, the exact size cap, and the resolution parameters. Photos and signatures must always be in JPEG or JPG format, while category, educational, and disability certificates must be uploaded as PDFs.

When capturing your live photo or scanning an existing passport photo, remember that the background must be light (preferably white or light grey). Shadows on the face or red eyes from low-quality camera flashes will trigger automated rejection on the portal.

Step-by-step: compress PDF for SSC CGL

Whether you are using a Windows desktop or a basic Android smartphone, follow these precise steps to format and compress your documents using Siliph before trying to upload them to the portal:

Fix common portal errors

Even with compressed files, the legacy infrastructure of government portals can throw confusing messages. Here is how you can resolve the most common issues based on firsthand candidate feedback.

File too large

If your photo is 41KB or your signature is 20.5KB, the portal's automated validation script will reject it. When you encounter this, do not guess the compression level. Re-upload the file to Siliph and explicitly set the target size to 30KB for photos or 15KB for signatures. Keeping your files slightly below the ceiling ensures they bypass strict server-side validation filters.

Blurry scan rejected

Candidates often compress their documents too aggressively, turning their text or facial features into unreadable pixelated blocks. To prevent this, keep DPI at exactly 150 to preserve scan readability. Siliph's advanced compression algorithms compress structural file data while preserving sharp contrast lines around text and facial features.

Wrong format

The portal will reject files with extensions like ".png", ".webp", or ".pdf" (when uploaded to the photo field). Always convert your images to ".jpg" or ".jpeg" format. When you upload any image to the Siliph tool, you can select the "Convert to JPEG" option during the resizing process to ensure perfect system compatibility.

Upload timeout

During high-traffic periods, the portal may throw a generic gateway timeout error (such as HTTP 504) or completely freeze during submission. If the portal throws a generic gateway timeout error, try compressing the scan further to 140KB. Reducing the overall file size decreases the HTTP payload transfer time, enabling the server to receive and process your upload even on weak 3G or 4G mobile connections.

FAQ

What is the exact photo size limit for SSC CGL 2026?

For the SSC CGL 2026 application, your scanned passport photo must be strictly between 20 KB and 40 KB in JPEG or JPG format. It is highly recommended to aim for a file size of roughly 30 KB to ensure it uploads successfully without getting rejected by the system's strict upper and lower limits.

Why does the SSC portal say "invalid file format" for my signature?

This error occurs if your signature is saved in PNG, WEBP, or PDF format, or if the file extension has been manually renamed without actual conversion. Your signature must be in JPEG or JPG format and sized between 10 KB and 20 KB; you can easily use Siliph to instantly convert and compress your signature file to the correct format.

Can I upload a PDF certificate larger than 300KB on the exam portal?

No, the official government / exam portal has a strict upper limit of 300 KB for PDF documents such as caste, educational, or disability certificates. If your scanned document exceeds this limit, use the Siliph PDF tool to compress it to approximately 150 KB to ensure smooth validation.

How do I fix the "Upload session expired" error on the SSC website?

This error is usually caused by slow network transmission times when trying to upload large files, or local browser cache issues. To fix it, compress your files to a smaller size using Siliph to decrease upload times, clear your browser history, and attempt the upload using Google Chrome in Incognito mode.

Will compressing my OBC/EWS certificate on Siliph reduce its visual quality?

No, compressing your certificates on Siliph maintains visual clarity by retaining key textual metadata and keeping the scan resolution at a crisp 150 DPI. The compression process selectively reduces unnecessary code and background color depth, ensuring your document remains fully legible for verification officers during physical document verification.

Compress now on Siliph

Don't let rigid file size limits delay your SSC CGL 2026 registration. Use our dedicated SSC CGL PDF Compressor to resize your passport photos to 20–40KB and signatures to 10–20KB in just a few clicks. If you have larger educational or category certificates that need optimization, you can also use our primary /compress-pdf tool to bring them safely under the 300KB portal limit while maintaining pristine legibility.

Related Siliph PDF tools

[SSC CGL PDF Compress](/exam-photo-resizer) — free, browser-based, built for SSC CGL 2026 Form Filling Documents uploads. No signup required on the free plan.

More free tools on Siliph:

Browse all tools at /tools or exam compressors at /exam-tools.