Compress Signature to 20KB Online
Last reviewed: May 2026
Most Indian government portals — UPSC, SSC, IBPS, state PSCs, online OTR systems — accept a scanned signature only if it lands inside a narrow KB window. 20 KB is the most common minimum (and often the maximum on lighter forms). Sukat hits that ceiling precisely: drop your signature scan, type 20 KB, and download. No upload, no signup, no watermark.
How to compress your signature to 20 KB
- Upload your scan. Drop the signature file (JPG, PNG, or directly from a phone scan app) onto Sukat's drop zone, click to browse, or paste from clipboard.
- Set 20 KB as the limit. Type
20in the Maximum File Size field and select KB. Choose JPEG as the output format — that's what UPSC, SSC, and IBPS portals expect. - Convert and download. Click Convert & Download. Sukat binary-searches for the highest quality that still fits under 20 KB and saves the result locally. Signatures are line art, so the output stays crisp.
When do you need a 20 KB signature?
The 20 KB ceiling shows up in nearly every Indian government recruitment workflow. Common scenarios:
- UPSC One Time Registration (OTR) — the signature upload step typically requires JPG between 20 KB and 300 KB. Many candidates aim for the floor (20 KB) to keep file sizes tight across multiple exam applications.
- SSC CGL, CHSL, MTS, and JE applications — SSC's portal historically caps signature at the 20 KB lower bound; older notifications were stricter still.
- IBPS PO, Clerk, RRB, and SBI bank exams — most banking exam portals run on the same upload widget and require a 10–20 KB signature.
- State PSC and university exam portals — KPSC, BPSC, MPPSC, RPSC, and many university entrance forms specify a 20 KB signature ceiling.
- Tender and procurement portals like GeM and CPP — vendor signatures often require a 20 KB upload to keep document bundles small.
- Online affidavit and notary services that ask for a digital signature scan attached to a PDF — 20 KB is the typical embedded-image budget.
If the form you're filling out also asks for a passport-size photo, see UPSC Photo & Signature Compressor — it covers the full upload workflow.
Why Sukat for signature compression
Hits the limit precisely, not "approximately." Generic compressors give you a quality slider and hope. Sukat reverses the problem — you set 20 KB as the ceiling and the algorithm searches for the highest quality that fits. You don't have to recompress three times to get under the form's hard limit.
Privacy that matches the document. Your signature is sensitive — it's the literal piece of identity attached to your application. Compression runs entirely in your browser. The file never leaves your device. Switch to airplane mode after the page loads and the tool still works; that's how you know.
Batch the whole application. Most candidates fill multiple forms in a single sitting. Drop signature, photo, ID, and certificates together, set per-file targets, and download everything at once.
Multilingual UI including Hindi. Sukat's interface is available in 10 languages. Most signature compressors are English-only, even when 90% of their traffic comes from India.
FAQ
What format does my signature need to be — JPG or PNG?
Most Indian government portals (UPSC, SSC, IBPS, state PSCs) require JPG / JPEG. Set Sukat's output format to JPEG before compressing. A few forms accept PNG; check the specific instructions on the notification you're applying under, since dimensions and KB ranges shift between cycles.
Will my signature still be legible at 20 KB?
Yes. A signature is high-contrast line art — black ink on white paper — and JPEG compresses that pattern very efficiently. A 600 × 200 pixel scan fits cleanly under 20 KB with no visible quality loss. Sukat picks the highest quality that fits, so you don't have to guess a percentage.
What are the typical KB and dimension requirements?
Common ranges seen on UPSC, SSC, and IBPS portals are 10–20 KB minimum, 20–300 KB maximum, with dimensions around 6 cm × 2 cm or roughly 140 × 60 to 600 × 200 pixels. Specifications change between cycles — always verify against the current notification before submitting.
Does Sukat upload my signature anywhere?
No. Compression runs in your browser via the Canvas API. Your signature never reaches a server. You can verify by opening Sukat, switching to airplane mode, then compressing — the conversion still works because there's no network call.
My scan has a beige or coloured paper background — can I clean it up first?
Yes. Sukat has a Remove Background button that runs an AI segmentation model in your browser to drop the paper. Use it for off-white or noisy scans, then compress the cleaned PNG to 20 KB. For ink-on-near-white-paper scans, simple JPEG compression is usually enough — no cleanup needed.
Can I batch-compress signature scans for multiple applications?
Yes. Drop several scans at once, set 20 KB as the target, and Sukat compresses each independently. Choose the ZIP option to download everything as one file, or get individual JPGs.
Other signature and image sizes
- UPSC Photo & Signature Compressor — full UPSC upload workflow (photo + signature in one place)
- Passport Photo Compressor — country-by-country KB + dimension targets for passport-style photos
- Reduce Image Size in KB — pick any KB target for any image
- Compress Image to 50 KB — neighbour size for slightly larger budgets
- Compress Image to 100 KB — common photo-upload ceiling
- Image Size Guide — full file-size reference for every platform