Compress Image to 100KB

1. 1

   Upload your photo — use the highest-resolution original available for the best starting point.

2. 2

   Enter 100 as the target size and select KB as the unit.

3. 3

   Click Compress. SizeSnap searches for the optimal quality level that fits exactly under 100KB.

4. 4

   Download your file and upload it to the portal. No more rejected submissions.

A 100KB limit is one of the tightest you will face, and it is surprisingly common. Indian government services — including the SSC (Staff Selection Commission), UPSC, railway recruitment boards, and state public-service commissions — routinely cap photo and signature uploads at 100KB or even lower. Banking KYC (Know Your Customer) portals in South and Southeast Asia, military recruitment applications, and competitive-exam registration systems are other frequent sources of this constraint. At 100KB, a full-frame photograph must be aggressively compressed or resized, which is why these portals usually also specify small pixel dimensions (often 200x230 or 150x200 pixels). The challenge is maintaining facial clarity — biometric checks and manual reviews both need a clean, recognizable image. SizeSnap's quality-search algorithm squeezes maximum visual fidelity out of every byte, which is critical when the budget is this tight. Unlike generic resizers that simply lower quality until the file is small enough, SizeSnap targets the exact byte count so you do not undershoot and waste quality headroom.

• Crop tightly around your face and shoulders before compressing — background pixels consume bytes without adding useful information for ID photos.

• If the portal requires a signature image under 100KB, scan at 200 DPI in grayscale rather than color to keep the raw file small before compression.

• Use JPEG format for photographs at this size — PNG files at 100KB will be noticeably lower resolution because PNG uses lossless compression.

• Check the portal's minimum dimensions. Compressing a 4000x3000 photo to 100KB will force extreme quality loss; resize to the required pixel dimensions first.

Is compressing to 100KB free?

Yes, SizeSnap is free for up to 3 compressions per day. No account needed.

Does SizeSnap work on mobile?

Yes, SizeSnap runs entirely in your browser and works on any device — iPhone, Android, tablet, or desktop.

Will my image lose quality when compressed to 100KB?

SizeSnap uses smart compression that minimizes visible quality loss. For 100KB, some quality loss is expected, but SizeSnap optimizes to keep the image looking good at this size.

What image formats are supported?

SizeSnap supports JPEG, PNG, WebP, and HEIC images. All formats can be compressed to exactly 100KB.