Compress Image to 20KB

Reduce photos and signatures to under 20KB for exam applications, government forms, and strict upload limits. Free, instant, and 100% private.

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Open 20KB Compressor →

Pre-configured: Tiny preset + JPEG + 800px max width

Compress Image to 20KB — Free, Fast & Private

20KB is one of the strictest file size limits you will encounter — common for signature uploads and small profile photos on Indian government exam portals. UPSC, SSC, RRB, IBPS, state PSC, and various recruitment boards often require signature images between 10-20KB and passport photos between 20-50KB.

To hit 20KB, you need aggressive compression combined with dimension reduction. MiniPx makes this straightforward: use the Tiny preset (quality 40%), JPEG format, and set max width to 400-800px depending on the portal requirements. For signature images, 400px width with Tiny preset reliably produces files under 15KB. For passport-style photos, 640px width with Tiny preset typically achieves 15-25KB.

The key to reaching very small file sizes is reducing pixel dimensions. A 4000px wide phone photo compressed to 20KB would be extremely blurry. But the same photo resized to 400-640px width and then compressed looks perfectly clear at the small display sizes used by government portals. MiniPx handles both the resizing and compression in a single step.

MiniPx shows the exact compressed file size next to your image, so you can verify it meets the 20KB requirement before downloading. If you are still slightly over, reduce the max width further. MiniPx processes everything in your browser — your exam photos, signature scans, and identity documents never leave your device.

Common portals requiring photos under 20KB include: UPSC Civil Services, SSC CGL/CHSL, RRB NTPC, IBPS PO/Clerk, various state PSC exams, and university entrance exam forms. MiniPx works with all of them.

How it works

Upload your photo or signature: Add the image you need to compress. Works with phone photos, scanned signatures, and images from any source.
Set Tiny preset + JPEG: Tiny preset provides maximum compression. JPEG format produces the smallest files for photos and signatures.
Set max width to 400-640px: For signatures, use 400px. For passport photos, use 640px. This is the key to hitting very small file sizes while maintaining clarity.
Check the file size: After compression, verify the size shown next to your image is under 20KB. If over, reduce the width further.
Download and upload: Save the compressed file and upload it to the exam portal or application form.

Frequently asked questions

How do I compress a signature to under 20KB?

Upload your signature scan or photo, set JPEG format, Tiny preset, and max width to 400px. Signatures typically compress to 8-15KB with these settings. If your signature has a colored background, crop it to just the signature area before compressing for smaller results.

How do I compress a photo to under 20KB for UPSC?

UPSC typically requires photos between 20-300KB depending on the field. For the 20KB requirement (usually signatures), use Tiny preset + JPEG + 400px width. For the photo field (usually 20-50KB), use Tiny + JPEG + 640px width. Check the specific UPSC notification for exact requirements.

Will the photo look clear at 20KB?

At 400-640px width, a 20KB JPEG is perfectly clear at the small display sizes used by government portals and exam forms. These portals display photos at 100-200px, so even a compressed 400px image has more than enough detail.

What if my image is still over 20KB?

Reduce the max width further: try 320px for signatures or 400px for photos. You can also crop the image to remove unnecessary background before uploading to MiniPx. White or solid-color backgrounds compress much better than complex backgrounds.

Can I compress photos for SSC/RRB/IBPS forms?

Yes. These exam portals typically require JPEG photos between 10-50KB. Use Tiny preset with appropriate max width (400px for under 20KB, 640px for under 50KB). MiniPx shows the exact compressed size so you can verify compliance with the specific portal requirements.

Is it safe to compress exam photos online?

With MiniPx, yes. Your photos never leave your browser — everything is processed locally using JavaScript. Unlike other online tools that upload your images to their servers, MiniPx keeps your identity documents and exam photos completely private on your device.