Image Compressor to a Target File Size
Reduce JPG, PNG, and WebP images to a chosen maximum file size (such as 20KB, 50KB, or 100KB) directly in your browser with live preview.
Make an image fit an upload limit
Check the required format, maximum file size and minimum dimensions first. Choose a size such as 20 KB, 50 KB or 100 KB, compress the image and inspect the actual result. A smaller file is useful only if its details remain readable.
Example Walkthrough: Reducing a High-Resolution Photo
A high-resolution camera photograph may measure several megabytes due to large pixel dimensions. When an upload form specifies a 50KB limit, the tool helps you reach that threshold through quality iteration and optional dimension scaling.
- Select a Target File Size: Choose a preset (such as 50KB) or enter a custom limit in kilobytes.
- Quality Iteration: The browser runs progressive encoding passes to find a quality setting that stays within your chosen byte ceiling.
- Dimension Scaling when Needed: If an image contains too many pixels to reach the target size without severe compression noise, enabling downscaling reduces pixel dimensions proportionally.
- Compare and Download: Review the original and compressed images side-by-side in the split comparison viewer to inspect clarity before downloading.
File Size, Resolution, and Encoding Quality
Digital image file size depends on two factors: total pixel count (width x height) and compression efficiency. When an image contains millions of pixels, reducing file size purely by lowering quality can introduce compression noise and banding. Allowing proportional dimension scaling enables the compressor to maintain clearer visual contrast while meeting strict byte limits.
Common questions
What happens if my target size cannot be reached?
If the target limit is extremely small for the image's original dimensions and downscaling is turned off, the tool will produce the smallest file possible at the minimum quality floor and display a notice explaining that further reduction requires downscaling.
What is the difference between compression and resizing?
Compression lowers the number of bytes used to encode the pixel data while keeping or slightly adjusting dimensions. Resizing explicitly alters the image width and height in pixels.
Should I choose WebP or JPEG for compression?
WebP generally provides better compression efficiency than standard JPEG at similar visual quality. However, if your destination portal explicitly requires a .jpg or .jpeg file, choose JPEG.
Are my images stored or transmitted?
Files selected from your device stay in this browser tab for processing; we do not upload them to our server. If you choose Google Drive import, Google sends the selected files directly to your browser after you grant access.