Step 1: Check the size and format
The tool above is preselected to 512 KB. Choose one JPEG, PNG or WebP image from your device. If a service specifies JPG or another supported type, use the Output format control to match it.
Private exact-size compression
Compress image to 512 KB
Use this page to make an image fit under, below, less than, up to or maximum 512 KB. It is useful for document uploads, profile images and email attachments when you need a specific target size without sending the image to a server.
- Target already set
- Result verified before download
- Private metadata removed
Private image compressor
Prepare your image
Choose one image, set the limit, and download a verified result. Your original is never changed.
Loading workbench...
Advanced size range
Use this only when a form requires your image to be between two file sizes.
Resize image
Manual dimensions
Enter a width, a height, or both. No crop or fill is applied in this step.
Choose an image to preview planned dimensions.
Aspect ratio is off. Exact width and height may distort the image.
Selected image
Ready to compress
- Original size
- -
- File type
- -
- Output format
- Auto recommended
- Dimensions
- -
- Planned output
- Original dimensions
- Target
- Under 512 KB
Preparing your image
Checking the image safely in your browser.
Verified result
Your image is ready
Safely below your selected limit.
- Dimensions
- Output format
- Reduction
- Target status
- Private metadata
- Checking
The downloaded file was created and verified entirely in this browser.
Instructions for this target
How to compress an image below 512 KB
512 KB is a binary half-megabyte-style size budget. Here KB means 1024 bytes, so the configured target differs from 500 KB.
Step 2: Adjust settings for 512 KB
Check whether the receiving service uses decimal or binary units. When it is ambiguous, leave a margin below the stated maximum instead of relying on an exact boundary.
If you enter a width or height, use Resize and compress and keep Keep aspect ratio checked to avoid stretching. Resize only does not enforce a file-size limit.
Step 3: Verify the download
Select the compress button, inspect the before-and-after previews and check the output size and dimensions. Download only after the size verifies below 512 KB and the image still looks suitable.
A file-size pass does not mean it meets every third-party image requirement.
About this example
The use case above illustrates what someone might do with a 512 KB budget. It is not a claim that any named organisation requires this exact limit. Check your receiving service's published maximum, accepted format and required dimensions.
Nearby exact sizes
Other useful target sizes
Medium KB targets often balance acceptable visual quality with common upload limits. The workbench keeps the selected target editable if you need a nearby exact size.