Convert Signature to JPG Under 20KB
Your signature was rejected because it is a PNG with transparency, or an iPhone HEIC file that the portal does not recognize. This tool does two things at once: converts any image format to JPEG (replacing transparency with a white background) and compresses it under 20KB - the standard limit for SSC, UPSC, and banking exam portals.
Input formats
PNG, HEIC, WebP, BMP
Output format
JPG (JPEG)
Target file size
≤ 20 KB
Transparency
Auto-filled white
Format conversion details
Accepted inputs
PNG, HEIC, WebP, BMP, TIFF
Output format
JPEG (.jpg)
Transparent areas
Replaced with white background
Target dimensions
140 x 60 px (configurable)
Target file size
≤ 20 KB
Processing
100% browser-based, private
How it works
Upload your PNG, HEIC, or WebP signature
The tool detects the format automatically. Transparent PNG backgrounds are replaced with solid white during conversion.
Auto-convert to JPEG and resize
The image is converted to JPG format and resized to standard 140x60 px signature dimensions if needed.
Compress under 20KB and download
JPEG quality is optimized to bring the file strictly under 20KB while maintaining readable ink strokes. Download the portal-ready file.
Frequently asked questions
Why do portals reject PNG signatures?
Many government exam portals only accept JPEG/JPG format. PNG files - especially those with transparent backgrounds - fail validation checks because the portal expects a solid white background and a .jpg extension.
What happens to the transparent background?
When a PNG with transparency is converted to JPEG, the transparent areas are automatically filled with a solid white background. This prevents the signature from appearing on a black or checkered background.
Will converting from HEIC reduce quality?
No significant quality loss. HEIC is already a compressed format. Converting to JPEG at the right quality level produces a clean, sharp signature image suitable for portal uploads.
Can I set a different KB target or dimensions?
Yes. After the tool opens, you can change the target KB (e.g., 10KB or 50KB) and dimensions (e.g., 200x100 px) to match your specific portal requirements.
Bharat Kumar G.verified
Technical SEO & Document Processing Expert
Bharat is the founder of ReadyToSubmit. With years of experience in technical web development, he builds privacy-first, client-side tools to help Indian government exam aspirants format their applications accurately and securely without server uploads.