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Compress, resize, crop, convert and watermark images in a single workflow - with live before/after preview and bulk processing.
What is compress image to 100kb?
Many platforms - email clients, online forms, CMS uploads - enforce a 100KB image limit. Vakru automatically finds the best JPEG quality setting that keeps your image at or under 100KB, preserving maximum sharpness. The binary search runs entirely in your browser in under a second. No upload, no watermark, no signup. Free forever.
How it works
Auto-target a 100KB output for JPG, PNG and WebP - matches the most common upload limit for forms, CMSes and email clients.
Upload your image
Drop a JPG, PNG, WebP, GIF or BMP file. The image stays on your device - no cloud upload involved.
Target is locked at 100KB
The 100KB target is pre-selected. You can switch output between JPEG and WebP for even sharper results.
Binary-search compression runs
Our engine iterates through quality levels to find the highest-fidelity image that still fits under 100KB.
Download the 100KB image
Save the optimized image with one click - ready for forms, CMS uploads and email attachments.
💡 Pro Tips
Resize before compressing for best quality
Scaling a 3000px image to 1200px before hitting the 100KB target will preserve far more detail than compressing the full-resolution version.
WebP gives better quality at 100KB
Switch output to WebP - it achieves 25-35% better visual quality than JPEG at the same file size.
Bulk mode for batch workflows
Upload up to 50 images and compress them all to 100KB in one pass - each file is optimized independently.
PNG originals need format conversion
PNGs are lossless and often large. Converting to JPEG or WebP before targeting 100KB yields much sharper results.
Frequently Asked Questions