Compress Image Online - Target File Size
Compress JPG, PNG or WEBP images toward your desired file size directly in your browser.
Check each image name and size before starting compression.
How to Compress Image to Target Size
Upload
Select JPG, PNG or WEBP images.
Set Target
Choose your required file size in KB or MB.
Set Target
Enter your required KB or MB.
Download
Check actual details and download.
Features
Custom Target
Set your own target file size.
Image Quality
Adjust quality and reduce dimensions automatically when needed.
Aspect Ratio
Keep original image proportions.
Private
Processing happens locally in your browser.
Related Image Tools
Compress Images Online to Your Target File Size
Need to reduce an image for an online form, website, email or application? ZeroKB Image Compressor helps you compress JPG, PNG and WEBP images toward a target size in KB or MB. Choose your preferred output format, adjust image quality and review the actual output size before downloading.
Why Compress Images Before Uploading?
Large images can take longer to upload, share or load on a webpage. Compressing images can reduce file size, save storage space and lower data use. It is especially helpful when an application or website has a file-size limit for photographs or scanned images. For format-specific compression, try our Compress JPG tool, Compress PNG tool or Compress WEBP tool. Website owners can also use optimized images as one part of improving page performance.
How to Compress JPG, PNG and WEBP Images
First, click Browse Images or drag supported files into the ZeroKB Upload Pro area. You can select multiple images, and the selected-image panel shows their names and original sizes. Choose JPG, WEBP, PNG or Keep Original from Output Format. Enter your desired file size and select KB or MB, then adjust Starting Quality if needed. If quality changes alone cannot get close to the target, enable automatic dimension reduction. Click Compress to Target and wait for processing to finish. Your completed files appear in the ZeroKB Download list, where you can preview, download or delete each result.
Choose the Right Target Size and Format
A target such as 100 KB is a goal, not a promise that every image will be exactly that size. Results depend on the source image, visual detail, dimensions and output format. JPG and WEBP are often practical choices for photographs and smaller file sizes. PNG is useful when transparency or lossless image data matters, although its output may be larger. If an image remains above your target, try another format or allow automatic dimension reduction. Always check that the final image remains clear enough for its intended use.
Browser-Based Image Compression
ZeroKB processes images locally in your browser, so the compression workflow does not require uploading your images to a compression server. Processing time can vary with the image size, browser and device memory. The tool accepts JPG, PNG and WEBP images up to 25 MB per file. Keep the original image if it is important, because changing format or quality can affect appearance.
Explore More Free ZeroKB Tools
Need a different file tool? Use the Image Compressor for general image compression, convert photographs with Images to PDF, or choose a dedicated JPG compressor, PNG compressor or WEBP compressor. Select the tool that matches your task, check the actual output and download the finished file when it is ready.
Frequently Asked Questions
Yes. Enter the target in KB or MB. The tool calculates the actual encoded output and shows its final size.
This version keeps the original dimensions. If the target size cannot be reached through quality changes, enable automatic dimension reduction.
Not always. Browser image encoders cannot guarantee an exact byte size for every image. The tool shows the closest actual result instead of faking the target.
JPG and WEBP normally provide better practical size control than PNG.
No. Processing is performed locally in your browser.