How can I resize my signature to 20KB for an online form?
Upload your signature image above and the tool will resize signature to 20KB automatically. It removes extra paper, cleans the grey background to white, and fits your name into 140 × 60 pixels. Then it saves a sharp JPG between 10KB and 20KB, which is the range many bank and SSC forms ask for. Press Download and your file is ready to upload.
Why 10KB–20KB is the most common signature size
If you have filled a bank, SSC, or state recruitment form, you have probably seen the line "signature: 10KB to 20KB, JPG". It is the most widely used signature rule in India. The upper limit keeps the database light. The lower limit of 10KB is there so the image is not too blurry to verify. That lower limit is where many applicants get stuck.
A clean 140 × 60 px signature on white paper often compresses to only 3KB–6KB. Many free tools happily give you that file, and then the portal says "file size must be at least 10KB". This tool handles both sides. It keeps the best quality under 20KB. If the result is still below your minimum, it adds a small, invisible padding block inside the JPG, so the file reaches 10KB without changing a single pixel of your signature.
Signature specifications at a glance
| Recruiting body | File size (recent notices) | Dimensions | Ink |
|---|---|---|---|
| IBPS (PO, Clerk, SO, RRB) | 10KB – 20KB | 140 × 60 px (preferred) | Black ink on white paper |
| SBI recruitment | 10KB – 20KB | 140 × 60 px | Black ink on white paper |
| SSC (OTR / CGL / CHSL / MTS) | 10KB – 20KB | About 4 cm × 2 cm | Running signature, no capitals |
| Many state PSCs and boards | 10KB – 20KB or up to 30KB | Varies by notice | Usually black or blue |
These values come from recent public notifications and can change. Check the latest notice on the official site, for example ibps.in, SBI Careers or ssc.gov.in.
How to use the Signature to 20KB tool
- 1Upload or paste
Choose a JPG, PNG or WebP image, drag it in, or paste a screenshot with Ctrl+V.
- 2Keep the defaults for bank/SSC forms
Maximum 20KB, minimum 10KB, size 140 × 60 px. Auto-crop and background cleaning are already on.
- 3Adjust only if needed
Faint pencil-like strokes? Lower the cleaning strength. Signature sideways? Tap Rotate 90°. Different size in your notice? Choose another preset or type custom pixels.
- 4Confirm the green status and download
The pill should read "✓ Valid (10–20 KB)". Download the JPG and upload it to the signature field.
Tips from real form-filling experience
Over many application cycles, the same few issues cause most signature rejections. Here is what works:
- Sign three times and pick the best. Use a fresh white A4 sheet and a black ballpoint. Choose the signature that is smooth and similar to the one you will sign at the exam centre.
- Fill the frame. Your name should cover most of the width. The auto-crop helps, but a signature written very small on a big page will still look thin.
- Stay consistent. The signature you upload is matched with what you sign on the attendance sheet and during document verification. Do not change your style between forms.
- Avoid scanned PDFs. Portals want a JPG image. If you only have a PDF, take a screenshot of the signature area and upload that.
- Keep the photo and signature separate. Resize your photograph with the Photo to 20KB or Passport Photo Resizer tools.
Why use PhotoKB instead of a mobile app?
Most "photo compressor" apps are designed for holiday pictures. They do not crop signatures, do not clean paper shadows, and do not respect a minimum KB rule. They also ask for gallery permissions and show ads between every step. This page is built only for application forms. It works in any modern browser, needs no installation, and does all processing on your device with the HTML5 Canvas API. Nothing is uploaded, so it is safe to use in a cyber café too.
Need a smaller file? Try Signature to 10KB. Need a higher-quality one? Try Signature to 50KB. For a heavily shadowed photo, start with Clean Signature Background.
Frequently Asked Questions
How do I resize my signature to 20KB?
Upload the signature on the PhotoKB Signature to 20KB tool. Keep the defaults (max 20KB, min 10KB, 140 × 60 px) and click Download once the status shows Valid.
Why does the portal say my signature is less than 10KB?
Small signatures compress to only a few KB. This tool can add a harmless padding block inside the JPG so the file reaches the 10KB minimum without changing the image.
What is the correct signature size for IBPS and SBI?
Recent IBPS and SBI notices ask for 10KB–20KB at 140 × 60 pixels in black ink on white paper. Always confirm in the current notification.
Can I sign in blue ink?
Banking exams usually ask for black ink. Some other exams accept blue. Black ink on white paper is the safest choice for all forms.
Is a signature in capital letters accepted?
No. Many recruitment boards state that signatures in CAPITAL letters will not be accepted. Use your normal running signature.
Does this tool work offline?
After the page loads, all processing runs in your browser, so it keeps working even if your connection drops.
Is it free?
Yes, it is completely free with no sign-up, no watermark and no limit on the number of signatures.
About this tool
Built and maintained by the PhotoKB Editorial Team. We test every tool with real phone photos, scans and PDFs before each update. Exam and portal values are based on public official notifications. PhotoKB is not linked to any exam body, so always confirm current rules on the official website. Last updated: 8 November 2026.