Compress PDF to 300KB for Government Portals

Published August 1, 2026 · 7 min read

You scanned your degree certificate, your photo, your signature — everything the SSC portal asks for. Then the upload form rejects your file: “Document must be between 100 KB and 300 KB.” Your scan is 4 MB. This is the single most common technical hurdle for Indian government job applicants, and it happens on every major portal: UPSC, SSC, RRB, IBPS, state PSCs, and railway recruitment boards. Here is exactly how to hit those tight size targets without your documents becoming unreadable blurs.

Typical size requirements by portal

These ranges are typical for 2025–2026 recruitment cycles. Always check the specific notification for your exam, as limits vary by post and year.

Why your scans are too large

Phone cameras shoot at 12+ megapixels. A scanner defaults to 300 or 600 DPI. Both produce images far larger than what a 300 KB limit allows. A single A4 page scanned at 300 DPI in color is roughly 3–5 MB as a JPEG and 8–15 MB as a PDF. You need to get that down by a factor of 10–50x.

The good news: government documents are mostly text with a stamp or seal. Text compresses extremely well because it is high-contrast (black on white). You can drop quality aggressively and the characters stay legible.

Step-by-step: compress a PDF to 300 KB

1. 1Open LoveMyFile's Compress PDF tool and drag in your scanned document.
2. 2Set the target size to 0.3 MB (300 KB). The tool will iteratively reduce image quality until the file fits.
3. 3Click Compress. Processing happens in your browser — your certificate or marksheet never leaves your device.
4. 4Download the result. Check the file size in your file explorer. If it is still over 300 KB, run it through once more at a lower quality setting.
5. 5Open the compressed PDF and verify that all text, stamps, and seals are still readable. Zoom to 100% — that is how the verification officer will view it.

For photos and signatures (JPG, not PDF)

Most portals want your photo and signature as JPG files, not PDFs. For these, use LoveMyFile's Image Compressor instead. The workflow:

• Photo (20–50 KB): Crop to passport dimensions (35×45 mm ratio), resize to 200×260 pixels, compress at 60–70% JPEG quality.
• Signature (10–30 KB): Crop tightly around the signature, resize to 200×80 pixels, compress at 50–60% quality. A signature is just lines on white — it survives heavy compression perfectly.

You can also use the Image Resize tool to set exact pixel dimensions before compressing.

What stays sharp and what degrades

Understanding this helps you set expectations:

• Text stays sharp. Black text on white background has extreme contrast. Even at 30% JPEG quality, characters remain crisp because the compression algorithm preserves hard edges well.
• Stamps and seals stay readable. Round stamps with bold text survive compression. Faint pencil marks or watermarks may fade.
• Photographs degrade first. If your document contains a photo (like a marksheet with a student photo), that area will show JPEG artifacts before the text does. This is acceptable for verification purposes.

Tips for getting under tight limits

• Scan in grayscale, not color. A grayscale scan is roughly 1/3 the size of a color scan. Government documents rarely need color to be valid.
• Scan at 150 DPI, not 300. For on-screen verification, 150 DPI is more than enough. You can always rescan at higher DPI if an officer requests it.
• Crop the margins. Remove the white border around your document. Less pixels = smaller file.
• One document per file. Do not merge your degree + marksheet + ID into one PDF. Upload them separately as the portal expects.

Why local compression matters here

You are uploading caste certificates, income proofs, educational marksheets, and identity documents. These are the most sensitive personal documents you have. Using an online compressor that uploads your file to a server means a third party gets a copy of your Aadhaar card or degree certificate — stored on their infrastructure, subject to their retention policy, potentially in another country's jurisdiction.

LoveMyFile's tools run entirely in your browser. The compression happens on your device using JavaScript. No file is transmitted anywhere. You can verify this yourself: open your browser's Network tab (F12 → Network) while compressing, and you will see zero outgoing requests with your file data.

Quick reference: target sizes

Always aim 10–20% under the stated maximum. Portals measure file size differently (some use 1 KB = 1024 bytes, others use 1000), and you do not want a rejection over a 2 KB rounding difference.