MB to KB Image Compressor
Reduce your image to a chosen KB or MB target. Preview the real result, then download—all in your browser.
Your result will appear here.
WebP preserves transparency and uses quality adjustment. AVIF is available only if this browser can encode and decode it. PNG is lossless at the chosen dimensions; reaching a target may require smaller dimensions. JPEG fills transparency with your chosen background.
AVIF encoding is unavailable in this browser.
Only need to convert MB to KB? Use our numerical file size converter →
A little help for every file.
From a quick conversion to a perfectly sized image.
File size converters
Make sense of every byte. Convert decimal and binary storage units with confidence.
10 tools to explore →▧↗Image tools
Resize, compress, and convert your images. Keep your files on your device.
8 tools to explore →▤↗PDF & document tools
Check documents, build PDFs from images, and prepare files for sharing.
6 tools to explore →◷↗Storage & upload calculators
Plan your storage, estimate upload times, and check attachment limits.
6 tools to explore →Small tools. Big time-savers.
A handpicked selection for the tasks that come up often.
Image Compressor
Reduce image size with adjustable quality and a live output comparison.
PROCESSED ON YOUR DEVICE▧Image Resizer
Resize to exact pixel dimensions, with an optional aspect ratio lock.
PROCESSED ON YOUR DEVICE▤PDF Compressor
Make a smaller rasterized copy of a PDF, with explicit quality trade-offs.
PROCESSED ON YOUR DEVICE◷File Upload Time Calculator
Estimate upload duration from file size, connection speed, and overhead.
FREE ONLINE TOOL▤Image to PDF Converter
Arrange multiple images and create a PDF with page and margin controls.
PROCESSED ON YOUR DEVICE⇄File Size Converter
Convert between bits, bytes, and all common decimal and binary file units.
FREE ONLINE TOOLGood to know.
Simple tools deserve simple answers.
Are these tools really free?
Yes. Every tool on this site works without payment or registration.
Are my images or PDFs uploaded?
No. Our file tools use browser APIs and locally served libraries. Your files are processed on your device and are not sent to a processing service.
Can I compress an image to an exact KB size?
The tool searches quality settings and reduces dimensions when necessary. It reports actual bytes and whether your target was reached, rather than promising an exact size. KB means 1,000 bytes and MB means 1,000,000 bytes.
Can I use the tools on my phone?
Yes, in a current browser. Processing limits help protect device memory; large files may still be too demanding for some phones.
Will compressing a file always make it smaller?
No. Some files are already well optimized. Check the original and output sizes, and inspect the quality before replacing your original.