Filled out the entire GDS application and got stuck at the signature upload step? You’re not alone. The India Post GDS portal rejects a lot of signature files not because anything is wrong with the signature itself, but because the image is the wrong size or shape. The fix is simple once you know the numbers: your signature needs to be 320×160 pixels, in a 5:2 landscape ratio, saved as a JPG under 20KB.
Below is the exact specification, a step-by-step way to fix your file, and a rundown of the mistakes that cause most GDS signature rejections in the first place.
Why Signature Size Matters for India Post GDS
The GDS application form isn’t manually checked at the upload stage — it’s an automated filter. If your signature file doesn’t match the required pixel size, ratio, format, and file size, the system flags it before a human even sees your application. This has nothing to do with how good your signature looks; it’s purely a technical check. Getting the file specs right the first time means one less thing to worry about while you’re focused on the rest of your application.
Official Signature Specifications for GDS Application
- Pixel Dimensions: 320 width × 160 height
- Aspect Ratio: 5:2 landscape (±10% tolerance)
- Format: JPG/JPEG only
- Size Limit: Under 20 kilobytes
- Background Colour: White background mandatory
- Signature Style: Clear and legible
- File Type: Image file only, not PDF
Note: Always cross-check these numbers against the latest official GDS notification for your recruitment cycle, since India Post has revised specifications in the past.
How Our India Post GDS Signature Resizer Works
- Resizes to exactly 320×160 pixels
- Locks the 5:2 landscape ratio automatically
- Compresses intelligently to stay under 20KB
- Corrects the background to pure white
- Converts any format to GDS-accepted JPG
- Works smoothly on mobile — no app needed
No technical know-how required — upload, let it process, and download. If you still need your photo resized for the same application, our Post GDS Photo Resizer handles that separately.
Step-by-Step Signature Preparation Guide
1. Create Your Signature Properly
- Sign on plain white paper with black or blue pen
- Leave a small margin around the signature — don’t let it touch the paper’s edge
- Photograph or scan at 200 DPI for a sharp result
- Keep it consistent with your usual signature style
- Sign with even, steady pressure so the ink doesn’t look patchy
- Try a couple of versions and pick the cleanest one
2. Scan or Capture Your Signature
A scanner at 200 DPI gives the cleanest result, but a smartphone photo in good daylight works just as well. Just make sure the background stays pure white with no shadows falling across the paper.
3. Upload to Resizer Tool
Use the button at the top of this page to upload your signature image.
4. Let the Tool Adjust to GDS Requirements
The resizer automatically sets your image to 320×160 pixels, corrects it to a 5:2 ratio, converts it to JPG, and compresses it below 20KB — you don’t need to touch any settings manually.
5. Download and Verify
Download the resized file and check its properties — confirm it reads 320×160 pixels and sits comfortably under 20KB before you upload it to the official India Post GDS portal.
Common Signature Errors & Solutions
| Common Error | Solution |
|---|---|
| File name too complex | Rename to a simple name like signature.jpg |
| Signature blurry or pixelated | Start with a higher-quality original photo |
| Signature touches the edges | Add a small margin/padding around it before resizing |
| File size exceeds 20KB | Run it through the compression step |
| Ink too light to read | Increase contrast during scanning or retake in better light |
| Wrong dimensions or ratio (not 320×160 / 5:2) | Resize using the tool above — it locks the exact ratio |
Digital Signature vs Scanned Signature
- Scanned Signature: Sign on paper, then scan or photograph it. More natural-looking and closer to your real signature.
- Digital Signature: Drawn directly with a mouse or touchpad. Handy in a pinch, but often looks less like your actual signature.
- Best Practice: Go with whichever method gives you the clearest, most natural-looking result — for most people, that’s the scanned version.
Pro Tips for a Trouble-Free GDS Signature
- Practice your signature a few times before settling on the final one
- Keep it consistent with what you use on other official documents
- Save a backup of both the original and resized files
- Rename the file to something simple before uploading
- Double-check your file against your ID documents before submitting
- Make sure there’s good contrast between the ink and the white background
Final Checklist Before Submission
- ✓ Dimensions: 320×160 pixels
- ✓ Aspect Ratio: 5:2 landscape
- ✓ File size: Under 20KB
- ✓ Format: JPG/JPEG
- ✓ Background: Pure white
- ✓ Clarity: Signature clearly visible
- ✓ File name: Simple and appropriate
- ✓ DPI: 200 DPI recommended
- ✓ Colour: Good contrast (black/blue on white)
Important: The signature you upload should match the one you use on your other official documents — verification staff do check this.
Conclusion
Most GDS signature rejections come down to the same handful of technical issues — wrong size, wrong ratio, or file too large. Once your signature matches 320×160 pixels, a 5:2 ratio, and stays under 20KB, that part of your application is done and won’t come back to cause trouble. Run it through the resizer above, tick off the checklist, and move on to the rest of your GDS application with confidence.
Frequently Asked Questions
Yes, a pure white background is mandatory. An online resizer can automatically correct the background if your original scan or photo isn’t perfectly white.
Keep it simple, such as signature.jpg or gds_signature.jpg. Avoid spaces, special characters, or overly long file names.
Yes, use the same signature style you currently use on your other official documents and ID proofs, since this may be checked during verification.
Yes, you can sign in any language or script you normally use, as long as it fits clearly within the required 320×160 pixel frame.
Double-check the file matches 320×160 pixels, a 5:2 ratio, and under 20KB. If it still fails, the original signature photo may be too blurry or low-contrast — retake it with better lighting and try again.