Signatures for digital forms
Signature Under 10 KB — 140×60 px
Preset and ready: drop a file and the output lands under 10 KB as JPEG, capped at 140×60 px — processed entirely in your browser.
Drop your image here or browse
JPEG, PNG, WebP — everything stays on your device
Why this exact limit matters
One hundred forty by sixty pixels, ten to twenty kilobytes: the IBPS signature rule, exactly as the guidelines state it. A signature scan almost never struggles with the KB half — black strokes on white paper compress to almost nothing — so in practice this preset’s real job is the pixel box, shrinking an over-enthusiastic scan into the 140×60 frame the portal expects.
A signature is high-contrast line art, which compresses extremely well — hitting a small kilobyte target normally costs almost nothing in legibility. 10 KB is one of the tightest limits you will meet online, and this page is preset to exactly that ceiling.
This page locks both constraints for you: the output is capped at 140×60 px and at 10 KB total size, which is the combination application forms actually check.
How to compress to 10 KB
- Drop your signature scan into the box above — it stays on your device.
- Confirm the target: under 10 KB as JPEG, dimensions set to at most 140×60 px.
- The MozJPEG encoder searches its quality range so the JPEG output lands just under your limit. Dimensions are set to at most 140×60 px.
- Preview the result, compare it with the original if you want, and download — the filename carries its actual size.
Tip: If your scan has a grey or shaded background, the encoder spends bytes on that noise. A clean white background is the single biggest size saver for signature files.
Measured: the IBPS signature preset on a real scan
Our signature-style test file — 1600×700, dark strokes on plain white — through the 10 KB + 140×60 lock:
Source file
22.4 KB
1600×700 JPEG
Size check
2.1 KB
far under 10 KB
Dimension check
137×60
inside 140×60
Quality setting
q100
maximum
The striking number is quality 100: inside this frame the encoder could not spend the KB budget even at maximum quality — 2.1 KB is what the shrunk line art honestly costs. If your form enforces the 10 KB floor strictly, scan at higher resolution (a 600-pixel-wide signature lands near the band) rather than padding the file.
Signature dimension rules worth knowing
| Form | Photo size rule | Dimensions | Format |
|---|---|---|---|
| IBPS PO & Clerk — signature | 10–20 KB | 140×60 px | JPG |
| SSC CGL — signature | 10–20 KB | 236×79 px | JPG |
| SSC CHSL — signature | 10–20 KB | 200×80 px | JPG |
| IBPS — photograph (the other file) → | 20–50 KB | 200×230 px | JPG |
From the 2025–26 cycles. Dimensions, not kilobytes, are where signature uploads actually fail — most scans are several times wider than the boxes these forms allow.
Frequently asked questions
2.1 KB is below the 10 KB minimum — will IBPS reject it?
If the portal enforces the floor mechanically, use a larger canvas: cap at 300×130 instead of 140×60 and the same signature lands around the 10 KB mark at still-excellent quality. The frame on this page can be edited — the KB lock stays.
My scan is landscape A4 — will it fit the 140×60 box?
Only after cropping. The box preserves aspect ratio, so a wide scan shrinks until its height fits 60 pixels — and the signature becomes a hairline. Crop to the strokes plus a small margin first; that is the entire skill of signature preparation.
Black-and-white scan or photo of the signed page?
A scan or a well-lit photo with the background cropped away — what matters is pure black strokes on pure white. Grey shadows from overhead lighting are the one thing that inflates a signature file.
Should my signature be PNG or JPEG?
JPEG is accepted by virtually every form and reaches very small sizes on line art. If you need PNG specifically, this tool optimizes it losslessly and offers a JPEG alternative when the lossless result cannot fit your limit.
Why JPEG and not another format for my upload?
JPEG is the most universally accepted image format on upload forms and gives the smallest files for photographs. If your destination accepts only "images", JPEG is the safe choice.
Do I need an account or app install?
No account, no install, no watermark. The page you are on is the whole tool.