ExamMint Resizer

Online Signature Compressor

Compress scanned signature images to target KB size limits (e.g., 10KB to 20KB) while maintaining readability.

Settings

Min Size (KB)
Max Size (KB)
Brightness 0
Contrast 0
Signature Clean Up 235

Cleans up shadows from scanned paper.

Privacy First: All image resizing and compression happens locally in your browser. No files are uploaded to any server.

Upload Image

Drag & drop or click to upload
Supports JPG, PNG, WEBP, HEIC (Max 15MB)

How to Compress Your Scanned Signature

Follow these simple steps to crop and compress your signature to under 20KB in seconds.

1. Upload Image

Take a photo of your signature with your phone and upload it. The processing is kept 100% private.

2. Apply Filters

Adjust the contrast slider. This turns grey backgrounds white and sharpens the ink strokes for scan machines.

3. Compress & Download

Set target boundaries to 10KB - 20KB, align the crop box around the signature strokes, and save.

Advanced Signature Optimization Engine

Crafted to make signature compression stress-free for competitive exam applications.

10KB - 20KB Presets

Auto-configured for official signature guidelines. Guarantees your final file is never rejected for being too large.

Ink stroke Preservation

Preserves the sharpness of thin pen lines, preventing digital blurring and pixelation.

100% Client-Side Privacy

All image processing runs entirely in your browser using local resources. No photos are sent to a server.

Background Cleaner

Easily wash out phone camera shadows and paper textures, producing a neat, pure white background.

Universal Compatibility

Works smoothly on Safari, Chrome, and Firefox on both mobile phones and desktop computers.

Zero Ads & Free Forever

No watermarks, no registration, and no hidden subscriptions. Totally free for students.

Guidelines for Application Signature Uploads

Government exams and banking portals (SBI PO, IBPS Clerk, SSC CGL, RRB) require scanned signatures to be clear and clean. A signature with shadows or illegible pen strokes can cause application rejections or delays.

Tips for Perfect Signature Uploads

  • Use Black Ink: Most portals explicitly request signatures in black ink on white paper for optimum computer legibility.
  • Avoid Capital Letters: Do not sign your name in all capital letters. Portals require signatures in a normal running handwriting.
  • Crop Closely: Frame your signature closely with minimal border margin to ensure details are readable when scaled.
  • Clear Shadows: Always ensure the background paper appears white and not grey or shadowed when uploading.

Exam-wise Signature Limits Table

Exam Body Standard KB Size Guidelines
SSC (Staff Selection Commission) 10 KB - 20 KB Black Ink, 4.0 cm x 2.0 cm
IBPS / SBI Bank Exams 10 KB - 20 KB Black Ink, 140 x 60 px
UPSC (Union Public Service Commission) 20 KB - 300 KB Black Ink, Min 350x350 px
NEET / JEE Entrance Exams 4 KB - 30 KB Black Ink, 3.5 cm x 1.5 cm

Frequently Asked Questions about Signature Compression

Helpful answers to guide your signature preparation.

What is the standard file size limit for signature uploads on official forms?
For most central and state exams (like SSC, IBPS, SBI, LIC, and Railways), the signature file size must be strictly between 10 KB and 20 KB. Some portals (like UPSC) permit larger file sizes, up to 300 KB, but require minimum pixel resolutions.
How do I compress my scanned signature to less than 20KB?
Upload your signature to our specialized tool. Our default configuration is already set to compress within the 10 KB to 20 KB range. Adjust the crop box to frame your signature, adjust brightness/contrast if needed to remove grey background noise, and click Download.
Why does my signature look distorted after compression, and how do I prevent it?
Distortion occurs when generic compression algorithms drastically downsample line art. Our tool uses customized thresholding and contrast optimization to keep high-frequency line strokes intact, ensuring your signature remains perfectly legible even under 10KB.
Can I take a picture of my signature using my phone and compress it?
Yes, you can! Put your signature on a plain sheet of white paper and snap a photograph under bright light. Upload it here, and use our contrast booster to turn shadows and grey backgrounds pure white, then save it as a highly compressed, portal-compliant JPG.
Why is a signature written in capital letters rejected?
All official recruitment agencies require signatures in running handwriting for biometric authenticity. Capital block letters do not represent a valid personal signature, which is why portals automatically reject them during verification.