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Compress an image to a target file size

Give a target size in kB and a quality floor. The compressor searches encoder settings for a result that respects your floors, and says plainly when the target cannot be reached.

Choose files

Tap to pick files from your device

Free plan: up to 3 images per job. Each file up to 20,000,000 bytes and 24,000,000 pixels (width x height). All selected files together up to 100,000,000 bytes. Animated images are not supported.

This operation runs in your browser. Your files are not uploaded for processing.

Results

Results appear here after you run the conversion.

    How to compress an image to a target file size

    1. 1

      Select or drop the images you want to make smaller.

    2. 2

      Enter a target size in kB.

    3. 3

      Set the lowest quality and the smallest width you are willing to accept.

    4. 4

      Run it, then check whether each result says Ready or Target not reached.

    What this tool does

    • Target size in kB with a quality floor
    • Minimum width floor, so an image is not shrunk past usefulness
    • Bounded search of at most 12 encode attempts
    • An honest Target not reached result instead of a faked percentage
    • Reads the file signature instead of trusting the file extension.
    • Applies EXIF orientation once, so a rotated photo exports the way you see it.
    • Flattens transparent areas onto the background color you choose when you export JPG.
    • Rejects animated images instead of exporting a single frame without telling you.
    • Reports the measured size of the file your browser produced.

    Questions about Compress image to a target size

    Is the target size guaranteed?
    No, and a tool that promises it is not telling you the truth. A target is a constraint the encoder tries to meet without crossing the quality and dimension floors you set. When it cannot, the result is marked Target not reached and the file is still given to you, so you can decide whether to lower a floor or accept the size.
    How does the compression actually work?
    Your browser re-encodes the image. The tool tries a ladder of quality values and, where allowed, smaller dimensions, stopping as soon as a result fits the target. It never runs more than 12 encodes, so the page stays responsive.
    Does compressing reduce image quality?
    Yes. JPG and WebP compression is lossy, so a smaller file means some detail is discarded. That is what the quality floor is for: the tool returns a file that is too large rather than crossing the floor you chose.
    Are my files uploaded to a server?
    No. This tool runs inside your browser tab, so the file bytes are read and written on your own device and are never sent to us for processing. Closing the tab discards everything, which is also why results cannot be restored after a reload.
    How much does it cost?
    The tools on this page are free to use, with up to 3 files per job. Paid plans for larger batches are described on the pricing page but are not on sale yet.

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