Signature Resizer & Compressor
Resize pixels, Fix Rotation, Set Exact DPI & Compress to Exact KB for Govt Forms.
Select Or Drag & Drop Signature Here
Supports JPG, PNG, WEBP
1. Select Form Preset
Ultimate Signature Resizer & Compressor for Govt Jobs
Applying for government jobs like SSC CGL, India Post (GDS), UPSC, or Railway (RRB)? Or perhaps you are filling out an online form for a PAN Card (NSDL/UTI)? Document rejection due to incorrect signature size is a common issue. The OnlineSuru Signature Resizer PRO is your ultimate free solution. It allows you to accurately resize signature dimensions in pixels, set strict DPI levels (like 200 DPI for PAN), and compress the file size to exact KB limits (e.g., 10KB, 20KB, 50KB) without making the ink blurry.
1-Click Signature Maker
Resize, Fix Rotation, Apply B&W Filter, Set Exact DPI & Compress
How to Use the Signature Resizer Online?
Follow this step-by-step guide to perfectly format your signature:
- Upload Image: Click the upload box and select your JPG, PNG, or WEBP signature photo from your mobile or PC gallery.
- Fix Rotation: If your photo was clicked sideways, use the Rotate Left or Rotate Right buttons below the image canvas to make it straight.
- Select Predefined Preset: Click on direct form presets like Post Office / SSC (140x60), PAN NSDL/UTI (400x200 & 200 DPI), or choose Custom Crop for manual dimensions.
- Adjust Crop Box: Drag the highlighted blue box exactly over your pen strokes. Avoid leaving too much empty white space.
- Apply Black & White Filter (Optional): Many Govt forms reject blue ink. Turn on the B&W Ink Mode toggle to convert your blue signature to pure black instantly.
- Generate & Download: Click "Resize & Compress". Our Exact-KB engine will process the file, and you can download a perfectly sized, highly clear JPG image.
Premium Technical Features of Our Tool:
- Super-Sampling Anti-Aliasing (HD Quality): Standard tools make signatures blurry when shrinking them to 10KB. Our advanced engine processes your signature at High-Resolution first, ensuring the pen ink never looks pixelated or jagged upon compression.
- Exact KB Compressor (Magic Padding): Need exactly 20KB? Our binary-search padding algorithm guarantees your file hits exactly under your target size (e.g., 19.6 KB) so it is never rejected for being "too small" or "too large".
- Advanced JFIF DPI Modifier: Unlike basic tools, this tool legally rewrites the image metadata (JFIF header) to set accurate 100, 200, 300, or 600 DPI. This is strictly required by NSDL/UTI PAN card verification systems.
- 100% Secure & Local Processing: Your signatures are highly confidential personal data. Our tool is built on pure JavaScript, meaning your images are processed completely locally in your browser. No files are ever uploaded or saved to our servers.
Frequently Asked Questions (FAQs)
1. What is the standard signature size for Post Office (GDS) and SSC?
The standard requirement for SSC and India Post (GDS) forms is 140 x 60 pixels with a file size strictly between 10 KB to 20 KB.
2. How to fix a sideways signature photo?
Upload your photo in our tool and use the L Rotate or R Rotate buttons located directly below the image canvas to make it straight before cropping.
3. What are the strict signature requirements for an NSDL/UTI PAN Card?
For online PAN Card applications, the signature must be scanned at 200 DPI with dimensions of 400 x 200 pixels (or proportional) and the file size must not exceed 20 KB. Our PAN preset handles all this automatically.
4. How does the DPI Setter work?
DPI (Dots Per Inch) is a printing metric. Our tool modifies the internal JPEG metadata (JFIF header) to exactly embed 200 DPI or 300 DPI so that Govt verification systems accept the image instantly.
5. How can I make my blue pen signature black?
Turn on the B&W Ink Mode toggle. It automatically converts your blue or colored signature into a pure black and white format required by many Govt portals.
6. Why does my signature get blurry when reducing to 10KB?
Standard compressors lower the quality blindly. Our "Super-Sampling" engine uses an optimized looping algorithm that maintains maximum edge sharpness while hitting your target.
7. Can I free-crop my signature without a locked box?
Yes! Click on the Free Custom Crop preset. This will unlock the cropper box ratio, allowing you to manually stretch and select any part of the image.
8. Is it safe to upload my private signature here?
Absolutely 100% safe. This tool processes your image entirely inside your local web browser. Your signature is never uploaded or saved to any servers.
9. What is the UPSC signature dimension limit?
UPSC forms require the signature dimensions to be a minimum of 350 x 350 pixels, with a file size strictly between 20 KB and 300 KB.
10. Can I use this tool on my mobile phone?
Yes! The tool is completely mobile-responsive. You can take a photo from your mobile camera, upload it, rotate it, crop it, and download easily.
Running Exact KB Algorithm...
Optimizing ink and setting DPI...