Compress Image to 20KB
Preconfigured to target ~20 KB (20,480 bytes) — a common cap for signatures, ID photos, and legacy portal uploads.
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Results
About this tool
Twenty kilobytes is a size that shows up again and again on identity, exam, and government form portals — particularly for signatures and small profile photos. This landing sets up the compressor to aim near 20 KB and iteratively re-encodes your image until the output size is close. It works with JPG, PNG, WebP, and AVIF sources, and prefers JPG output for photo-like inputs because JPG usually reaches these small targets with the least visible damage. All processing happens in your browser.
FAQ
Yes. The tool aims slightly under 20 KB so the file passes typical portal validators.
Yes. Signatures compress well because they are mostly white space.
You can type any value between 5 and 500 KB — the workflow stays the same.
No. Everything runs in the browser tab.
Yes. The output is a standard JPG or PNG that portals recognize.
More about this tool
How it works
- Add one image that needs to land near about 20 KB.
- The tool aims for about 20 KB for very strict attachment or roster uploads. Results are approximate, not exact bytes.
- Check the preview. If the target is unrealistic, crop or resize the source and try again, then download.
Tips
- Center the subject — Crop empty background first so bytes go to the face or product.
- Avoid dense screenshots — UI captures need higher budgets; try 50 KB+ for readable text.
- Watch color banding — Gradients suffer at 20 KB—flatten backgrounds when you can.
- Keep EXIF out of mind — Metadata is stripped or irrelevant at this size; focus on pixels.
Supported formats
Input: JPG, PNG, WebP, AVIF. Output: JPG (most common at this size) or PNG when transparency is important.
Input
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JPG jpg, jpeg
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PNG png
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WEBP webp
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AVIF avif
Output
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JPG jpg, jpeg
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PNG png
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WEBP webp
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AVIF avif
Common uses
- Signature uploads for exam and job applications
- Small ID photos on legacy government portals
- Bank KYC forms with tight photo caps
- College admission portals
- Old-style CMS avatar fields
Limitations
- Landing within a KB or two of 20 is expected but not guaranteed.
- Photos with many colors may need a resize to fit under 20 KB cleanly.
- Signatures scanned as PNG will usually be converted to JPG for size.
- Very fine handwriting can lose crispness at this budget.
- About 25 MB per file, processed one at a time.