Compress Image to 45 KB
Make an image 45 KB or smaller for upload limits while keeping the best quality possible.
or drop an image here
JPG · JPEG · PNG · WebPCompress an image to 45 KB or less
Use this page when a form, portal or website requires an image no larger than 45 KB. SmallPNG processes JPG, JPEG, PNG and WebP locally and searches for the best practical result that fits the limit.
When is a 45 KB image useful?
- Government and application portals with strict photo limits
- ID, signature and profile-image uploads
- Small scanned documents or form attachments
- Legacy systems with very low upload limits
How to compress an image to 45 KB
- 1Choose a JPG, JPEG, PNG or WebP image.
- 2Keep 45 KB as the target or enter your own limit.
- 3SmallPNG processes the image locally in your browser.
- 4Download the result when it meets the target.
How SmallPNG reaches the target size
For JPG and WebP, SmallPNG first searches encoding quality. If that is not enough, it gradually reduces image dimensions. PNG uses browser PNG encoding and can also require smaller dimensions for aggressive targets.
Supported image formats
The v1 tool supports JPG/JPEG, PNG and WebP in modern browsers.
| Format | Method |
|---|---|
| JPG / JPEG | Quality + dimensions |
| PNG | PNG encode + dimensions |
| WebP | Quality + dimensions |
Does 45 KB mean exactly 45 KB?
No. The compression target means 45 KB or smaller. A result such as 96.8 KB on a 100 KB page is successful because it fits the upload limit.
Private browser-based processing
Supported images are decoded and processed locally in your browser. They are not sent to a SmallPNG image-processing server.
All common target sizes
Related tools
Frequently asked questions
Are my images uploaded?
No image-processing upload is required for the supported v1 formats. Processing runs locally in the browser.
Will the result always be 45 KB or smaller?
The compressor searches quality first and then reduces dimensions if needed. If a target cannot be reached safely, the tool reports a failure instead of marking an oversized result as successful.
Why can a very small target reduce image resolution?
Very small file limits may not contain enough data for the original resolution, so reducing dimensions can be necessary to meet the requested size.