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Compress Picture

Pass the strictest upload limits

Compress image to 20 KB

Drop a photo or scanned signature and get it back at or under 20 KB — or type 10, 15, or any custom limit. Quality and dimensions are tuned automatically, right in your browser.

  • Exact 20 KB limit
  • 100% free
  • No upload
  • No signup
  • Batch up to 30

Drop pictures here or click to browse

JPG, PNG, WebP · up to 30 files at once · stays in your browser

photo.jpg2.4 MB412 KB−83%

Quality is tuned automatically so each picture lands at or under this size.

Resizing the longest edge often shrinks files dramatically.

How to compress an image to 20 KB

Three steps to a file that passes even the strictest application form — without leaving your browser.

  1. Drop your image

    Drag a JPG, PNG, or WebP file into the upload area, or tap to pick one (or up to 30) from your device. Photos, scanned signatures, ID pictures — nothing is uploaded, everything runs in your browser.

  2. Keep the 20 KB preset (or type your own)

    20 KB is preselected. The tool lowers JPEG quality step by step and, because 20 KB is a tight limit, also scales the dimensions down until the file genuinely fits. Need 10 or 15 KB for a signature field? Type it in the custom box.

  3. Download and upload it anywhere

    Each file comes back at or under 20 KB, ready for exam registrations, visa portals, and government forms. Check it with the before/after slider, then save one file or all of them.

Frequently asked questions

How does the tool get an image under 20 KB?
It re-encodes the picture as JPEG at progressively lower quality levels and measures the real output size after each pass. Because 20 KB is a very tight budget, quality alone is rarely enough — so the tool also steps the dimensions down until the file fits. You always get the largest, sharpest version that stays under the limit.
Is 20 KB enough for a clear photo?
Yes, for the kind of photo these forms expect. 20 KB comfortably holds a sharp JPEG around 400–600 px on the longest side — exactly the passport-style range most portals ask for. It will not hold a full-resolution phone photo at full size, which is why the tool resizes as part of hitting the limit.
Can I compress a signature to 10 KB or 15 KB?
Yes. Type any limit in kilobytes into the custom field. Scanned signatures compress extremely well — they are mostly white background — so 10–20 KB is usually enough for the 140×60 px signature images that exam and banking forms request.
Why do application forms demand images under 20 KB?
Exam registrations, government portals, visa services, and bank KYC systems process millions of submissions, so they cap photo uploads at 20–50 KB and signatures at 10–20 KB to keep storage and review fast. This tool exists so you can hit those caps in one pass instead of guessing.
Will my image look blurry at 20 KB?
Viewed small — as the form will display it — no. The tool always keeps the highest quality and largest dimensions that fit, and you can inspect the result with the built-in before/after slider before downloading. If a very detailed image cannot reach 20 KB cleanly, the tool stops at the smallest achievable size and tells you.
What happens to PNG files?
PNG is lossless, so its size cannot be tuned to a byte target directly. The tool converts PNG input to JPEG — which is what size-limited upload forms expect — and flattens transparency onto a white background. To shrink a PNG while keeping transparency, use the compress PNG tool instead.
Are my images uploaded to a server?
No. Compression happens locally in your browser using the Canvas API. Your photos and signatures never leave your device — worth knowing when the file is an ID photo or a signature.
Can I compress several images to 20 KB at once?
Yes. Drop up to 30 files — a photo and a signature, or a whole family's application pictures — and each one is compressed to the limit individually. Use Download all to save every result.

Built for the tightest size caps

A 20 KB limit is a different problem from a 100 KB one. At 100 KB, lowering JPEG quality is usually enough; at 20 KB it almost never is, because even a heavily compressed full-size photo weighs more than that. The only honest way down is to reduce dimensions and quality together — which is exactly what this tool automates, instead of you exporting, checking the size, and trying again.

Everything runs in your browser with the Canvas API. The tool encodes your picture at several quality levels, checks the real byte size each time, and when quality alone cannot reach 20 KB it scales the image down in steps and repeats. The result is the largest, sharpest file that genuinely fits — typically a sharp 400–600 px JPEG, which is precisely the passport-photo range strict forms ask for. Nothing is uploaded, and your files never leave your device.

Prefer to control quality by eye instead of by file size? Use the main picture compressor with its live quality slider. Facing a milder limit? Compress image to 100 KB keeps more detail when the form allows it.

Your files never leave your browser

Compression runs locally with the Canvas API. We do not store, upload, or analyse your pictures. The tool keeps working even if you disconnect from the internet after the page loads.