⚡ 100% Free • Unlimited • Batch • No Upload • Private

Compress Signature to 10KB Online Free

Instantly reduce your scanned signature to exactly 10KB or less. Keep black or blue ink sharp, crisp, and fully legible for strict official application portals. Squoosh-grade WASM codecs (MozJPEG, WebP, AVIF, OxiPNG), exact target-size mode, and batch ZIP export — all directly in your browser.

Upload Images

Drop, paste, or click to upload images (batch supported)

Compression Settings

Output format

Target size (KB)

We binary-search quality (and downscale if needed) to land at or just under 10 KB.

Max Width (px, 0 = original)

Flexible Image Compression for Every Need

Instantly reduce your scanned signature to exactly 10KB or less. Keep black or blue ink sharp, crisp, and fully legible for strict official application portals.

Use Case

Crucial for candidates filling out strict online applications for UPSC, UPPSC, SSC, banking exams, and university admissions where signature uploads are capped at an extreme 10KB limit.

How It Works

Hitting a strict 10KB file limit for a signature upload is one of the most frustrating parts of filling out official forms. Standard image compressors often destroy the image quality, turning your signature into a blurry, illegible mess that risks getting your application rejected. Our specialized 10KB signature compressor solves this by smartly downsizing the physical image width to 300 pixels while applying a highly tuned 30% JPEG quality constraint. This exact combination strips away unnecessary background data while preserving the high-contrast strokes of your pen. You get a perfectly compliant, crystal-clear file in seconds. Plus, because the compression runs securely in your browser, your highly sensitive signature is never exposed to external servers.

What You Get

Optimized images that balance quality and file size for faster uploads — with exact target sizes, AVIF/WebP/MozJPEG codecs, and unlimited batch ZIP export.

Frequently Asked Questions

Everything you need to know about compressing images online.

The secret is reducing the physical dimensions (width and height) rather than just destroying the quality slider. By limiting the maximum width to 300px, our tool naturally drops the file size to around 10KB while keeping the ink strokes crisp and easy to read.

While PNG is generally excellent for text and lines, hitting an extreme sub-10KB limit is significantly easier using the JPEG format. Our tool defaults to JPEG at 30% quality to ensure you reliably pass the strict file size limits of government and exam portals.

If your original scan was taken in poor lighting and has a heavy grey background, it might still hold too much data. Simply use our tool's settings to lower the 'Max Width' to 250px or 200px. Signatures don't need to be wide to look perfect on an application form.

Yes, it is 100% safe. Your privacy is protected because the image processing happens entirely locally on your own phone or computer. Your official signature is never uploaded, saved, or visible to our servers, preventing any risk of identity theft.

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