Pre-set target · 20 KB
Compress your signature to 20 KB.
Exam and job portals ask for the signature as a small JPEG — most sit in a 10–20 KB window. This editor arrives pre-set, lands just under the ceiling, and never uploads your file: the scan is read and rewritten entirely on your device.
Drop images to compress
or click to pick from your device. Paste withCtrl + V works too.
JPG · PNG · WebP · GIF up to 50 images stays on your device
Recommended for web pages and sharing
Perfect for upload portals and ID documents — we probe encoding quality automatically until each file fits.
Aspect ratio is always preserved — leave a box empty to ignore that axis. We never upscale.
Downloads as a new .min JPEG — the original stays untouched on your disk.
What the forms actually check
Indian recruitment portals grade an upload four ways — format, byte window and often the drawn shape. Get them together once and the upload passes first try:
| What | Typical requirement |
|---|---|
| Format | JPEG / JPG only (no PNG, no PDF) |
| File size | A window, e.g. 10–20 KB — under the ceiling and off the floor |
| Shape | Roughly 6.0 × 2.0 cm — about 140×60 px at typical scan settings |
| Ink & paper | Black or blue ballpoint on plain white paper, running script (not block capitals) |
Figures taken from the Staff Selection Commission's photo/signature upload instructions (ssc.gov.in, notice of August 2024), checked October 2026. Each cycle can differ — confirm your live notice before submitting.
Why a window and not just "under 20 KB"
A 3 KB file is technically "under 20 KB" — and exactly the kind of washed-out, miniature signature that portals reject summarily. Bytes are a proxy for quality at fixed dimensions, so serious forms declare both ends: small enough for their pipeline, big enough to review. That's why a target landing just under the ceiling — around 18–19 KB on this page — is the sweet spot: inside the window with margin, and the sharpest any 20 KB signature file can be.
You don't need tiny pixels to reach 20 KB
Signatures compress extremely well — black strokes on white paper with empty space in between is the easiest possible content for a JPEG encoder. A clean crop at reasonable pixel dimensions (rather than a whole A4 page) crosses under 20 KB at honestly-useful quality, no blurry sacrifices needed. Crop first, compress second — and the pixels stay working for the reviewer, not for the paper you scanned.
Three steps, two minutes
- 01
Scan or photograph it
Sign on white paper, black or blue ballpoint, and scan at ~300 DPI — or shoot it square-on in bright light. Crop tight: no empty paper margins.
- 02
Compress to ~19 KB
The editor arrives pre-set at 20 KB and lands just under it — inside the usual 10–20 KB window without touching the floor.
- 03
Upload as JPEG
The download is a fresh JPEG. Portals ask for JPG/JPEG specifically — a PNG, however clean, gets bounced.
Signature size, answered
What size does my signature file need to be?
For SSC-style central examinations the notice asks for a JPEG/JPG of 10 to 20 KB, roughly 6.0 cm × 2.0 cm (about 140×60 px to 200×60 px depending on the year's instructions). Other portals recur on the same theme — a small JPEG window your scan must sit inside. Always confirm on the live notice before you submit; portal rules change between cycles.
My compressed signature came out at 5 KB — is that a problem?
It can be. Rules are usually a window (10–20 KB), not just a ceiling, and a file under the floor looks weak in the reviewer's preview — "miniature" or washed-out signatures are a stated rejection reason. Aim for the top of the window: the tool on this page lands around 18–19 KB, comfortably inside the range with headroom on both sides.
How do I keep a signature readable at 20 KB?
The pixels do the legibility work, not the bytes. Crop away white paper before compressing — blank margins cost bytes while the reviewer zooms your ink into a tiny corner of the box. Keep the width near the asked pixel count; a 140×60 px JPEG at 19 KB stores far more usable detail than a 900×400 JPEG crushed to the same size.
Can a signature be PNG or does it have to be JPG?
JPEG/JPG — every central exam notice states it explicitly, and transparent PNG areas can baffle the portal's preview. If your scan is a PNG, the converter page turns it into a JPEG first; the white background comes along free because JPEG has no transparency.
Is a phone photograph of my signature accepted?
A scan is ideal (300 DPI). A phone photograph works when the ink is dark, the paper is evenly lit and the shot is perfectly straight — tilted or glare-laced images read as "blurry", the other stated rejection reason. Shoot from directly above, crop to the strokes, then compress to ~19 KB on this page.
Preparing the matching photo too? Compress a photo to 20 KB or get the 20–50 KB window, and the resize tool handles the exact pixel shape. Building one bundle from several documents? The JPG to PDF tool assembles them — never uploading anything.