If you’re filling out an SSC form, your signature has to be exactly 4.0 cm × 2.0 cm (400 x 200 px) and between 10KB and 20KB, or the portal will reject it. This free SSC signature resizer crops, compresses, and converts your signature to those exact specs in seconds, right inside your browser.
Drop, paste, or browse your image.
Supports JPG, PNG, WebP, AVIF, HEIC/HEIF, GIF, BMP, TIFF, SVG, PDF, and ICO. Processed locally in your browser.
Batch mode: up to 5 images at once.
Your files never leave your browser. All processing happens locally on your device, keeping your images private and secure. Nothing is uploaded to our servers...Learn More. Free to Use. No Sign-Up Required. No Watermarks. No Usage Limits.
This tool was built specifically for SSC candidates who need to meet the exact 4.0 cm × 2.0 cm and 10KB to 20KB requirement. It runs entirely in your browser using HTML5 Canvas technology. Your signature is never uploaded to any server, never stored, and never shared. The crop box is locked to the 2:1 aspect ratio that SSC requires, so you cannot accidentally submit a signature in the wrong shape. Compression is done using adaptive quality tuning that preserves thin ink lines and keeps the signature readable for SSC verification systems.
What to Do Before Uploading Your Photo for Compression
Most SSC rejections happen before compression even starts. Applicants either upload the photo directly or compress the first image they have, without checking if the original is usable. A blurry, shadowed, or angled photo cannot be fixed by any tool. Here is what to do before you compress.
Capture It Right
- Plain white unruled paper, black pen only. Blue ink and ruled paper are common rejection triggers.
- Sign in running handwriting. Block capitals are treated as typed text, not a signature.
- Shoot from directly above in daylight. Angled shots distort the 2:1 ratio; shadows look like smudges.
Prepare Before Compressing
- Zoom in and check clarity first. If the ink lines are broken or fuzzy, retake the photo. Do not compress a blurry image.
- Crop to the signature only. Remove paper edges, table surface, and background.
- Skip filters and manual resizing. Let the tool handle format conversion, resizing, and compression in one pass to avoid double quality loss.
Compress With the Right Settings
- Target 20KB, output JPG. This gives the best quality within SSC’s 10KB–20KB limit.
- Preview before downloading. Zoom in and confirm the strokes are still sharp and readable.
Final Checks Before Upload
- File size: between 10KB and 20KB.
- Dimensions: 400 × 200 pixels (4.0 cm × 2.0 cm).
- Format: .jpg or .jpeg only—renaming a PNG does not convert it.
Following these steps takes a few extra seconds and prevents the most common SSC rejection: an unclear or incorrectly formatted signature. The tool above handles the technical part. The quality of the original photo is in your hands.
How to Resize Your Signature for SSC (Step-by-Step)
- Step 1: Upload your signature. Drag the photo into the box above or click to browse.
- Step 2: Crop to 2:1 ratio. The tool automatically locks the aspect ratio to 2:1, which is what SSC requires. Just drag the crop box to frame your signature. Make sure no shadows or ruled lines are inside the frame.
- Step 3: Set target size and download. Type 20 in the target KB box. Click the compress button. Once the file is ready, click download. Your signature is now a JPG file ready to upload to the SSC portal.
SSC Signature Requirements by Exam: CGL, CHSL, MTS, and GD Constable
While most SSC exams use the same signature specifications, some portals apply slightly different upload rules. Use the table below to confirm the exact requirement for your exam before submitting your application.
| Exam | Signature Dimensions | File Size | Format | Ink Color |
|---|---|---|---|---|
| SSC CGL | 4.0 cm × 2.0 cm (400 × 200 px) | 10KB to 20KB | JPG / JPEG | Black |
| SSC CHSL | 4.0 cm × 2.0 cm (400 × 200 px) | 10KB to 20KB | JPG / JPEG | Black |
| SSC MTS | 4.0 cm × 2.0 cm (400 × 200 px) | 10KB to 20KB | JPG / JPEG | Black |
| SSC GD Constable | 4.0 cm × 2.0 cm (400 × 200 px) | 10KB to 20KB | JPG / JPEG | Black |
| SSC OTR (One Time Registration) | 4.0 cm × 2.0 cm (400 × 200 px) | 10KB to 20KB | JPG / JPEG | Black |
All SSC portals reject signatures that are blurry, signed in capital letters, or photographed on ruled paper. Always sign in running handwriting with black ink on plain white paper.
Complete Specification Reference
| Parameter | Official SSC Requirement | Recommended Setting |
|---|---|---|
| File Size | 10KB to 20KB | 14KB to 18KB (safe center) |
| Format | JPG / JPEG only | JPG (MIME: image/jpeg) |
| Physical Size | 4.0 cm × 2.0 cm | Locked 2:1 landscape ratio |
| Pixel Size | Min 140 × 60 px | 400 × 200 px (standard) |
| Resolution | 200–300 DPI | 300 DPI for sharpest output |
| Background | Plain white | Solid white, no shadows or lines |
| Ink Color | Black (recommended) | Black ballpoint or gel pen |
| Writing Style | Running handwriting | Never block capital letters |
Why Generic Image Compressors Fail for SSC Signatures
Most free image compressors on the internet were built for photos, not signatures. A signature is made of thin ink lines on a white background. When a generic compressor shrinks the file size, it blurs those thin lines first. The result is a signature that looks fine on your phone but gets rejected by the SSC portal’s automated checker.
SSC signature verification uses optical character recognition to read the strokes of your signature. If the lines are broken or fuzzy, the system flags it as unreadable. This is why so many candidates get the error message: “Signature is not clear” or “Signature does not match the required format.”
This SSC signature resizer handles signatures differently from a general purpose compressor. It preserves the black ink contrast, keeps the white background clean, and compresses only the parts of the image that do not affect readability. That is why the output passes SSC verification even at 10KB to 20KB.
Final Checklist Before Submitting Your SSC Signature
Before you upload your signature to the SSC portal, run through this quick checklist. Signature is in black ink on plain white paper. Dimensions are 4.0 cm × 2.0 cm. File size is between 10KB and 20KB. Format is JPG. Signature is in running handwriting, not capital letters. No shadow or ruled lines visible. If all six are checked, your signature is ready. Use the tool above one more time if you need to adjust anything.
Common SSC Signature Upload Errors and How to Fix Them
If your SSC application was rejected because of your signature, the fix is usually one of the five problems below. Find your error message and apply the solution.
File size exceeds the allowed limit
This means your signature is larger than 20KB. Open the tool above, upload the same signature, and set the target KB to 20. The compressor will shrink it to under 20KB automatically while keeping the ink lines sharp.
Image dimensions do not match the required specification
This error appears when your signature is not in the 2:1 ratio that SSC requires. The tool above locks the crop box to 2:1, so you cannot accidentally upload a square or portrait signature. Just drag the crop box and download.
Signature is not clear or readable
Blurry signatures are rejected because the SSC verification system cannot read the strokes. This usually happens when the original photo was taken in low light, at an angle, or with a shadow across the paper. Retake the photo on plain white paper in daylight, then run it through the tool above.
Invalid file format. Only JPG is allowed
SSC portals accept only JPG or JPEG files. If your signature is a PNG, WebP, or HEIC file, the portal will reject it. This tool converts any of those formats to JPG during download, so you do not need a separate converter.
Signature appears to be in capital letters
SSC requires signatures in running handwriting. Block capital letters are treated as typed text, not a signature, and are rejected during verification. If your signature looks like printed capitals, sign again in cursive or running hand on plain white paper.
Why 100% Client-Side Processing Protects Candidate Privacy
This SSC signature resizer runs entirely inside your browser using HTML5 Canvas technology. Your signature never leaves your device. It is never uploaded to a server, never stored in any database, and never shared with third parties.
For government exam applications that include personal identity documents, local-only processing is the safest option. You can verify this yourself: disconnect your internet after the page loads and the tool will still work perfectly. That is proof your file is being processed on your own device, not on a remote server.
Frequently Asked Questions About SSC Signature Resizer
What is the correct signature size for SSC exams?
The correct size is 4.0 cm × 2.0 cm, which translates to 400 × 200 pixels. The file size must be between 10KB and 20KB, and the format must be JPG or JPEG.
Can I use a blue pen for my SSC signature?
No. SSC requires black ink only. Signatures in blue ink are sometimes accepted but are frequently flagged during verification. Always use a black ballpoint or gel pen on plain white paper.
What happens if my SSC signature is more than 20KB?
The SSC portal will reject your application with the error “File size exceeds the allowed limit.” Use the tool on this page to compress your signature to under 20KB without losing clarity.
Can I sign in capital letters for SSC?
No. SSC requires signatures in running handwriting. Signatures in block capital letters are treated as typed text and rejected during verification.
Is this SSC signature resizer free to use?
Yes. It is completely free. There is no signup, no watermark, and no daily limit. You can resize as many signatures as you need.
Does this tool upload my signature to a server?
No. Everything runs inside your browser. Your signature photo never leaves your device. This keeps your personal document completely private.
What paper should I use for my SSC signature?
Use unruled plain white paper. Ruled paper, graph paper, or paper with any lines or marks will cause your signature to be rejected during verification.
Can I resize my SSC signature on a mobile phone?
Yes. This tool works on Android and iPhone. Take a photo of your signature with your phone camera, upload it here, crop it, and download the compressed JPG directly to your phone.
Related Tools
What Makes This Tool Different
Most online resizers treat signatures the same way they treat photos. They shrink the file size by blurring the image. For a photo that is fine, but for a signature it causes rejection. This tool is built only for signatures. It keeps the black ink sharp, the white background clean, and the 2:1 ratio locked. The result is a file that passes SSC verification on the first upload.