Compress Image to Exact Target KB.
Compress images to under 20KB, 50KB, 100KB, 200KB, or 1MB with iterative binary-search optimization.
Drop your images here to compress
or, drag and drop images here
Reduce image file size with zero quality loss • Processed locally
How Binary Search Compression Works
Set Target KB Ceiling
Click a preset button (20KB, 50KB, 100KB, 200KB, 500KB, 1MB) or type any custom target size.
Iterative Convergence
Our engine iteratively tests canvas quality levels within milliseconds until the file lands exactly within the required byte window.
Smart Downscale Fallback
If an image cannot reach a very low target (e.g. <20KB) by quality reduction alone, dimensions are subtly scaled down to guarantee compliance.
Frequently Asked Questions
How does the binary search algorithm achieve an exact target KB?
Our engine runs a rapid client-side binary search on Canvas compression parameters, checking the resulting blob size against your specified KB boundary. It converges on the highest possible visual quality that strictly satisfies your file size ceiling, eliminating the frustrating trial-and-error guesswork of manual percentage sliders.
What happens if my image cannot reach the target KB even at low quality?
When an image contains too much high-frequency detail to fit the target KB at normal dimensions, our algorithm intelligently downscales pixel dimensions slightly until the resulting file comfortably satisfies your exact KB limit, ensuring your photo remains compliant without failing strict portal upload requirements.
Which target KB presets are commonly needed for government and job forms?
Most competitive exams and official portals enforce limits between 20KB and 50KB for candidate photographs, 10KB to 20KB for signatures, and under 100KB to 200KB for scanned certificates and ID documents. Our preset buttons give you instant one-click access to these common portal thresholds.
Will compressing an image to 50KB make it too blurry to read?
Not for standard portrait or document crops. By preserving essential contrast and edges while optimizing color compression, text on ID cards and facial features on passport photos remain clear and easily identifiable, satisfying automated biometric scanners and human verification reviewers alike.
Can I compress multiple photos to the same target KB simultaneously?
Yes. You can upload a batch of photos, specify your required target KB (such as under 100KB), and our engine will compress each image individually to meet that exact threshold before packaging them into a convenient ZIP download, saving you valuable time on bulk submissions.