SparkpondYour pixels stay in this tab.
Compress an image to 50 KB
The 50 KB limit is prefilled. Sparkpond runs a bounded series of real encodes on this device and reports whether the target was reached.
- Add images
- Adjust
- Download
Drop images here
or choose files from this device
JPEG, PNG, WebP, AVIF, HEIC/HEIF · batch size adapts to your deviceTry a sample:
- ✓ No upload
- ✓ No account
- ✓ Works locally
Weight, dimensions and format are verified.
No account, queue or upload.
From image to download in three steps
- 1 Add
Choose one or more images.
- 2 Adjust
Adjust only the settings for this tool.
- 3 Download
Get the validated result.
Guide · EN
How it works
Add an image; its real format is checked locally.
Review the visible preset and adjust it if needed.
Process and download only the validated result.
Formats and settings
- The 50 KB limit is prefilled. Sparkpond runs a bounded series of real encodes on this device and reports whether the target was reached.
A concrete example
A 1.8 MB photo can be tested at several safe quality levels to find the best candidate at or below 50 KB.
Know before you start
- 50 KB is a target ceiling, not a promise of an exact byte count.
- Complex images may require dimension reduction, and some targets cannot be reached safely.
FAQ · 3
Frequently asked questions
Will the result be exactly 50 KB?
No. The value is a target ceiling. The best safe encode may be smaller or may remain above it.
Are my files uploaded?
No. Decoding, searching and encoding run in a Worker in this browser.
Can the dimensions change?
Yes, only when dimension reduction is allowed and needed to approach the target.