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Compress to 20 KB

Re-encode as JPEG under 20 KB. Quality drops first; pixels shrink only if needed. Runs locally in your browser.

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Compress image to 20KB

Image compress to 20KB free. Shrink a JPG under 20KB in your browser for strict upload limits. Local-first, no sign-in.

What does compress to 20 KB mean?

Compressing to 20 KB means re-encoding an image as JPEG so the download is at or under 20 KB. People search for “image compress to 20kb” when a form rejects larger files. This free local-first tool adjusts JPEG quality and, if needed, pixel size until the file fits.

Compress to 20 KB features

Hit a hard JPG size limit without leaving the browser.

  • Target 20 KB

    Binary-search JPEG quality to land at or under the cap.

  • Auto scale if needed

    If quality alone is not enough, dimensions shrink until the file fits.

  • Local-first

    Encode stays on your device.

  • Free

    No account and no watermark.

How to image compress to 20kb

Three steps to a JPG under 20 KB.

  1. Upload

    Drop a JPG, PNG, WebP, GIF, or BMP.

  2. Compress

    The tool re-encodes toward 20 KB automatically.

  3. Download

    Save the JPG when the size readout looks right.

Tips

Better results under 20 KB.
  • 01

    Start from a clear photo

    Heavy noise makes tiny targets harder without looking soft.

  • 02

    Portal uploads

    Many forms want at or under 20 KB—this tool aims for that cap.

  • 03

    Need a larger file instead?

    Use Increase JPG Size when a form asks for a minimum KB size.

Great for

When uploads reject files over 20 KB.

  • Application portals

    Meet photo size rules without desktop software.

  • Email and forms

    Shrink a picture that is just over the limit.

  • Private compress

    Keep ID photos on your device.

Why compress here

A focused 20 KB JPEG path.

  • Free

    Compress to 20 KB with no signup.

  • Exact target

    Built for a hard byte cap, not a vague quality slider alone.

  • Local-first

    No cloud upload for compression.

Technical notes

How 20 KB compression works.
Input
JPG, PNG, WebP, GIF, or BMP up to the shared image upload limit.
Output
JPEG at or under 20 KB when possible.
Method
Browser canvas JPEG encode with quality search, then optional downscale.
Privacy
Client-side only—no network upload.

Sources & References

References for JPEG compression.
  • “JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography.”
    — Wikipedia — JPEG

    JPEG: This tool uses lossy JPEG re-encoding to meet a byte target. en.wikipedia.org/wiki/JPEG

  • “Creates a Blob object representing the image contained in the canvas.”
    — MDN Web Docs

    HTMLCanvasElement.toBlob(): Quality passes are encoded with canvas toBlob as image/jpeg. developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/toBlob

Frequently Asked Questions

Quick answers about this tool—open a question to read more.