Resize Image to KB — Compress Photo to Exact File Size Free
Compress any photo to a specific file size — 20KB, 50KB, 100KB, 200KB, or a custom target. Free online tool with no watermark and no signup. Your image stays in your browser.
✓ Free · ✓ No upload · ✓ Works offline in your browser
Drop image here or click to upload
JPG, PNG, WebP — compressed entirely in your browser
Common File Size Requirements
| Use Case | Max Size | Recommended Target |
|---|---|---|
| Passport / visa photo | 50–100 KB | 50 KB |
| Government portal upload | 100–200 KB | 100 KB |
| Job application / resume photo | 50–200 KB | 100 KB |
| Email attachment (single) | 1 MB | 500 KB |
| WhatsApp / messaging | Varies | 200 KB |
| University admission portal | 100–500 KB | 200 KB |
| Instagram / social (web upload) | 30 MB | 1 MB |
The tool uses JPEG compression (binary search on quality) to reach your target size. For very aggressive targets (e.g. 20KB from a large image), it also scales pixel dimensions down to achieve the required size while preserving the best possible quality.
Frequently Asked Questions
How do I resize an image to a specific KB size?
Upload your photo above, choose a target size (20KB, 50KB, 100KB, 200KB, 500KB, or 1MB), then click Compress Image. The tool uses binary search on JPEG quality to hit your target as closely as possible — all in your browser. Download the result instantly.
How do I decrease image size in KB online for free?
Upload your image, set the target file size in KB using the preset buttons or the custom field, and click Compress Image. The tool compresses the image using JPEG quality reduction to bring it under your target size. Free, no signup, no upload to server.
How do I compress an image to exactly 20KB?
Select the 20KB preset and click Compress Image. The tool runs a binary search on JPEG compression quality to find the highest quality that produces a file at or under 20KB. For very large images, it may also scale down the pixel dimensions to meet the target.
Why do I need to resize an image to a specific KB?
Many online forms, visa applications, job portals, and government websites have strict file size limits (e.g. under 50KB for passport photos, under 100KB for document uploads). This tool lets you hit those limits exactly without manual trial and error.
What happens to image quality when compressing to a small size?
JPEG compression reduces quality as the file size decreases. Compressing to 100KB from a 3MB photo typically produces a visually good result. Compressing to 20KB from the same photo will show visible compression artifacts. The tool always uses the highest quality achievable within your target.
Is there a limit on input file size?
No server-side limits — compression runs entirely in your browser. Very large images (20+ megapixels) may take a few seconds to process.